Using SqlTransaction Object Across Functions
Jun 27, 2006
I have a class which has connection, transaction object and BeginTransaction of that method opens the transaction. This class has an array of objects of a base class which refers to their derived classes at runtime and passes the reference of connection and transaction object to the derived class. Now from the main class I call BeginTransaction and then from any of the array element some insert update will be called using the same connection and transaction which has been opened from parent class.
I get the following exception while executing the sql statement in the method of derived class
Unhandled Exception: System.InvalidOperationException: ExecuteNonQuery requires
the command to have a transaction when the connection assigned to the command is
in a pending local transaction. The Transaction property of the command has no
t been initialized.
at System.Data.SqlClient.SqlCommand.ValidateCommand(String method, Boolean as
ync)
at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult res
ult, String methodName, Boolean sendToPipe)
at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
I tried using isolation level but transaction control does not work. I can not change the design...
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Nov 6, 2003
updatestring = "Update [Flow] set received=1 where flowid=@flowid"
insertstring = "Insert into [Flow] (barcode, copyid, floworder, recvdate, recvuser, recvdepartment) "
insertstring += "values (@barcode, @copyid, @floworder, @recvdate, @recvuser, @recvdepartment)"
is it can't use sqltransaction in the same table ???
when i not apply the sqltransaction, then the about two queries can work success, but when i apply the sqltransaction, then have an error in following.
error :
Object reference not set to an instance of an object
Source Error:
Line 278: message.Text = "Recebido o documento " & barcodetx.Text & "!!"
Line 279: Catch ex As Exception
<red>Line 280: objtransaction.Rollback()</red>
Line 281: message.Text = "Não se conseguiu registar!!"
Line 282: Finally
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Apr 4, 2006
Hi,
I am getting this error message
"This SqlTransaction has completed; it is no longer usable"
What's really strange is that I am getting this error from a page where I am not even using SqlTransaction.
How can I find the root cause and solve this problem?
Help Please!
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Oct 16, 2007
hi,Is it over head to use SqlTransaction(begin, commit, rollback) for a single transaction.am not using application block or enterprise library.only a single insert statement.
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Mar 15, 2006
Hi,
I use SqlTransaction to add record to the database. But I got a warning message on the "objTransact.Rollback()" that said "Variable 'objTransact' is used before it has been assigned a value, A null reference exception could result at runtime". what does this mean? how can I fix it? The following is the code. Thanks.
---------------------------------------------------------------------------------
Dim objTransact As SqlTransaction
Try
objConnect.Open()
objTransact = objConnect.BeginTransaction()
cmd.Connection = objConnect
cmd.Transaction = objTransact
-----do some sql query here............
objTransact.Commit()
Catch objError As Exception
objTransact.Rollback()
Finally
objConnect.Close()
End Try
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Oct 17, 2007
Hi,
I am getting the below error when using the SqlTransaction's for doing DML operations for different tables,
"System.Data.SqlClient.SqlException: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding."
Thanks in advance.
With regards,
Mani
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Apr 4, 2007
Hello,
I want to know, if you can use SqlTransaction even if you only execute one statement/query? I am particularly interested in Rollback(), which is called when the user presses the cancel button to abort a long file transfer.
Does rollback immediatley cancel the transfer and return control? Or, what is the best way of implementing a cancel option for transferring data?
Thank you
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Dec 31, 2007
I want to know if it's a good practice to use sql-transaction in both c# and sql procedures code.
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Jul 23, 2005
Hi All,I am using a SQLTransaction to insert records into a table. At onetime, there are 5000 or more records to be inserted one by one. Ittakes some 20-25 mins for the entire process to run.Another application accesses the same table.As long as the insert process within the transaction isn't completed,the second application is not getting any response from the server. Ieven tried to run a SELECT on the table in SQL Query Analyzer while theinsert process was running and it also did not respond till the timethe insert process finished!Is this normal that a transaction is locking up a table? How do Iovercome it? I am using IsolationLevel.ReadUncommitted for thetransaction.If I do not run the process within a SQLTransaction, the second processor running the SELECT in Query Analyzer does not hang.Thanks,Sanjeev Mahajan
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Mar 13, 2007
Hi,
So I'm having an issue with a SqlTransaction and retrieving the auto-increment ID after an insert. Presumably this is because I have to commit the transaction before the ID's are generated, but I need the ID's before I commit the transaction (because their is another part of the transaction that requires them).
Is there any way to get these id's other than maybe getting the Max(ID) and auto-incrementing them myself in code to what they will be when the transaction is committed. If this is the best way how do I ensure no other connections can insert stuff while this transaction is going on?
Or is there a better way to do this whole thing? (i don't know really know how to do stored procedures, and presumably this would be the best way, but is there a good way to do it not Stored Procedures)
Thanks!
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Apr 4, 2008
can anyone tell me what is the origin of this error "This SqlTransaction has completed; it is no longer usable".
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Jun 2, 2005
Hello,I am trying to begin a transaction is ASP.NET that acts as a temporary lock on a record so that another web user can not gain access to that row of information. My problem is that when I begin the transaction, if the user then closes out of the browser completely, the temporary lock that is put on my table from the transaction does not go away. Further, I have no idea if it will or if there is a time range you can specifiy to do so.What I am wondering is if anyone has ever tried this before, or does anyone have a definite answer to the following question, "If I begin a transaction, and then I do NOT rollback or committ that transaction, will it ever rollback on its own and if so where can I set this time frame?"Thanks in advance for any help.
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Jul 12, 2006
Hi,
I want to make SQLTransaction as global and use it checking the State.
But then where there are Only Select queries are going to fire, it will open transaction.
So, Does it locks database/tables when Only Select query comes in SQLTransaction.
If you have another successful way of doing this, Please suggest.
Thanking you.
tats
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May 26, 2006
I was playing around with the new SQL 2005 CLR functionality andremembered this discussion that I had with Erland Sommarskog concerningperformance of scalar UDFs some time ago (See "Calling sp_oa* infunction" in this newsgroup). In that discussion, Erland made thefollowing comment about UDFs in SQL 2005:[color=blue][color=green]>>The good news is that in SQL 2005, Microsoft has addressed several of[/color][/color]these issues, and the cost of a UDF is not as severe there. In fact fora complex expression, a UDF in written a CLR language may be fasterthanthe corresponding expression using built-in T-SQL functions.<<I thought the I would put this to the test using some of the same SQLas before, but adding a simple scalar CLR UDF into the mix. The testinvolved querying a simple table with about 300,000 rows. Thescenarios are as follows:(A) Use a simple CASE function to calculate a column(B) Use a simple CASE function to calculate a column and as a criterionin the WHERE clause(C) Use a scalar UDF to calculate a column(D) Use a scalar UDF to calculate a column and as a criterion in theWHERE clause(E) Use a scalar CLR UDF to calculate a column(F) Use a scalar CLR UDF to calculate a column and as a criterion inthe WHERE clauseA sample of the results is as follows (time in milliseconds):(295310 row(s) affected)A: 1563(150003 row(s) affected)B: 906(295310 row(s) affected)C: 2703(150003 row(s) affected)D: 2533(295310 row(s) affected)E: 2060(150003 row(s) affected)F: 2190The scalar CLR UDF function was significantly faster than the classicscalar UDF, even for this very simple function. Perhaps a more complexfunction would have shown even a greater difference. Based on this, Imust conclude that Erland was right. Of course, it's still faster tostick with basic built-in functions like CASE.In another test, I decided to run some queries to compare built-inaggregates vs. a couple of simple CLR aggregates as follows:(G) Calculate averages by group using the built-in AVG aggregate(H) Calculate averages by group using a CLR aggregate that similatesthe built-in AVG aggregate(I) Calculate a "trimmed" average by group (average excluding highestand lowest values) using built-in aggregates(J) Calculate a "trimmed" average by group using a CLR aggregatespecially designed for this purposeA sample of the results is as follows (time in milliseconds):(59 row(s) affected)G: 313(59 row(s) affected)H: 890(59 row(s) affected)I: 216(59 row(s) affected)J: 846It seems that the CLR aggregates came with a significant performancepenalty over the built-in aggregates. Perhaps they would pay off if Iwere attempting a very complex type of aggregation. However, at thispoint I'm going to shy away from using these unless I can't find a wayto do the calculation with standard SQL.In a way, I'm happy that basic SQL still seems to be the fastest way toget things done. With the addition of the new CLR functionality, Isuspect that MS may be giving us developers enough rope to comfortablyhang ourselves if we're not careful.Bill E.Hollywood, FL------------------------------------------------------------------------- table TestAssignment, about 300,000 rowsCREATE TABLE [dbo].[TestAssignment]([TestAssignmentID] [int] NOT NULL,[ProductID] [int] NULL,[PercentPassed] [int] NULL,CONSTRAINT [PK_TestAssignment] PRIMARY KEY CLUSTERED([TestAssignmentID] ASC)--Scalar UDF in SQLCREATE FUNCTION [dbo].[fnIsEven](@intValue int)RETURNS bitASBEGINDeclare @bitReturnValue bitIf @intValue % 2 = 0Set @bitReturnValue=1ElseSet @bitReturnValue=0RETURN @bitReturnValueEND--Scalar CLR UDF/*using System;using System.Data;using System.Data.SqlClient;using System.Data.SqlTypes;using Microsoft.SqlServer.Server;public partial class UserDefinedFunctions{[Microsoft.SqlServer.Server.SqlFunction(IsDetermini stic=true,IsPrecise=true)]public static SqlBoolean IsEven(SqlInt32 value){if(value % 2 == 0){return true;}else{return false;}}};*/--Test #1--Scenario A - Query with calculated column--SELECT TestAssignmentID,CASE WHEN TestAssignmentID % 2=0 THEN 1 ELSE 0 END ASCalcColumnFROM TestAssignment--Scenario B - Query with calculated column as criterion--SELECT TestAssignmentID,CASE WHEN TestAssignmentID % 2=0 THEN 1 ELSE 0 END ASCalcColumnFROM TestAssignmentWHERE CASE WHEN TestAssignmentID % 2=0 THEN 1 ELSE 0 END=1--Scenario C - Query using scalar UDF--SELECT TestAssignmentID,dbo.fnIsEven(TestAssignmentID) AS CalcColumnFROM TestAssignment--Scenario D - Query using scalar UDF as crierion--SELECT TestAssignmentID,dbo.fnIsEven(TestAssignmentID) AS CalcColumnFROM TestAssignmentWHERE dbo.fnIsEven(TestAssignmentID)=1--Scenario E - Query using CLR scalar UDF--SELECT TestAssignmentID,dbo.fnIsEven_CLR(TestAssignmentID) AS CalcColumnFROM TestAssignment--Scenario F - Query using CLR scalar UDF as crierion--SELECT TestAssignmentID,dbo.fnIsEven_CLR(TestAssignmentID) AS CalcColumnFROM TestAssignmentWHERE dbo.fnIsEven(TestAssignmentID)=1--CLR Aggregate functions/*using System;using System.Data;using System.Data.SqlClient;using System.Data.SqlTypes;using Microsoft.SqlServer.Server;[Serializable][Microsoft.SqlServer.Server.SqlUserDefinedAggregate (Format.Native)]public struct Avg{public void Init(){this.numValues = 0;this.totalValue = 0;}public void Accumulate(SqlDouble Value){if (!Value.IsNull){this.numValues++;this.totalValue += Value;}}public void Merge(Avg Group){if (Group.numValues > 0){this.numValues += Group.numValues;this.totalValue += Group.totalValue;}}public SqlDouble Terminate(){if (numValues == 0){return SqlDouble.Null;}else{return (this.totalValue / this.numValues);}}// private accumulatorsprivate int numValues;private SqlDouble totalValue;}[Serializable][Microsoft.SqlServer.Server.SqlUserDefinedAggregate (Format.Native)]public struct TrimmedAvg{public void Init(){this.numValues = 0;this.totalValue = 0;this.minValue = SqlDouble.MaxValue;this.maxValue = SqlDouble.MinValue;}public void Accumulate(SqlDouble Value){if (!Value.IsNull){this.numValues++;this.totalValue += Value;if (Value < this.minValue)this.minValue = Value;if (Value > this.maxValue)this.maxValue = Value;}}public void Merge(TrimmedAvg Group){if (Group.numValues > 0){this.numValues += Group.numValues;this.totalValue += Group.totalValue;if (Group.minValue < this.minValue)this.minValue = Group.minValue;if (Group.maxValue > this.maxValue)this.maxValue = Group.maxValue;}}public SqlDouble Terminate(){if (this.numValues < 3)return SqlDouble.Null;else{this.numValues -= 2;this.totalValue -= this.minValue;this.totalValue -= this.maxValue;return (this.totalValue / this.numValues);}}// private accumulatorsprivate int numValues;private SqlDouble totalValue;private SqlDouble minValue;private SqlDouble maxValue;}*/--Test #2--Scenario G - Average Query using built-in aggregate--SELECT ProductID, Avg(Cast(PercentPassed AS float))FROM TestAssignmentGROUP BY ProductIDORDER BY ProductID--Scenario H - Average Query using CLR aggregate--SELECT ProductID, dbo.Avg_CLR(Cast(PercentPassed AS float)) AS AverageFROM TestAssignmentGROUP BY ProductIDORDER BY ProductID--Scenario I - Trimmed Average Query using built in aggregates/setoperations--SELECT A.ProductID,CaseWhen B.CountValues<3 Then NullElse Cast(A.Total-B.MaxValue-B.MinValue ASfloat)/Cast(B.CountValues-2 As float)End AS AverageFROM(SELECT ProductID, Sum(PercentPassed) AS TotalFROM TestAssignmentGROUP BY ProductID) ALEFT JOIN(SELECT ProductID,Max(PercentPassed) AS MaxValue,Min(PercentPassed) AS MinValue,Count(*) AS CountValuesFROM TestAssignmentWHERE PercentPassed Is Not NullGROUP BY ProductID) BON A.ProductID=B.ProductIDORDER BY A.ProductID--Scenario J - Trimmed Average Query using CLR aggregate--SELECT ProductID, dbo.TrimmedAvg_CLR(Cast(PercentPassed AS real)) ASAverageFROM TestAssignmentGROUP BY ProductIDORDER BY ProductID
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Oct 11, 2006
Hi There,This is related to a ms access database but since I use the SqlDataSource control I thought I should post here.I have a project that I was working on with this ms access db and using sql controls, everything was working just finesince one day I started getting "Object reference not set to an instance of an object" messages when I try to designa query or retrieve a schema, nothing works at design time anymore but at runtime everything is perfect, its a lotof work for me now to create columns,schemas and everything manually, I've tried reinstalling visualstudio, ado componentsbut nothing seems to fix it, did this ever happen to any of you guys?any tip is really appreciated thanks a lot
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Dec 17, 2007
Does any one has any clue for this error ? I did went through a lot of articles on this error but none helped . I am working in Visual studie 2005 and trying to upload image in sql database through a simple form. Here is the code
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Web.Configuration;
using System.IO;
public partial class Binary_frmUpload : System.Web.UI.Page
{protected void Page_Load(object sender, EventArgs e)
{
}protected void btnUpload_Click(object sender, EventArgs e)
{if (FileUpload.HasFile == false)
{
// No file uploaded!lblUploadDetails.Text = "Please first select a file to upload...";
}
else
{string str1 = FileUpload.PostedFile.FileName;
string str2 = FileUpload.PostedFile.ContentType; string connectionString = WebConfigurationManager.ConnectionStrings["GSGA"].ConnectionString;
//Initialize SQL Server Connection SqlConnection con = new SqlConnection(connectionString);
//Set insert query string qry = "insert into Officers (Picture,PictureType ,PicttureTitle) values(@ImageData, @PictureType, @PictureTitle)";
//Initialize SqlCommand object for insert. SqlCommand cmd = new SqlCommand(qry, con);
//We are passing Original Image Path and Image byte data as sql parameters. cmd.Parameters.Add(new SqlParameter("@PictureTitle", str1));
cmd.Parameters.Add(new SqlParameter("@PictureType", str2));Stream imgStream = FileUpload.PostedFile.InputStream;
int imgLen = FileUpload.PostedFile.ContentLength;byte[] ImageBytes = new byte[imgLen]; cmd.Parameters.Add(new SqlParameter("@ImageData", ImageBytes));
//Open connection and execute insert query.
con.Open();
cmd.ExecuteNonQuery();
con.Close(); //Close form and return to list or images.
}
}
}
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.Source Error:
Line 32:
Line 33: string str2 = FileUpload.PostedFile.ContentType;
Line 34: string connectionString = WebConfigurationManager.ConnectionStrings["GSGA"].ConnectionString;
Line 35:
Line 36: //Initialize SQL Server Connection Source File: c:UsersManojDocumentsVisual Studio 2005WebSitesGSGABinaryfrmUpload.aspx.cs Line: 34
Stack Trace:
[NullReferenceException: Object reference not set to an instance of an object.]
Binary_frmUpload.btnUpload_Click(Object sender, EventArgs e) in c:UsersManojDocumentsVisual Studio 2005WebSitesGSGABinaryfrmUpload.aspx.cs:34
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +107
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102
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Aug 17, 2007
Hello All
Not sure if this is the right forum to post this question to, so if it's not, please accept my apologies.
I'm working in SQL Server 2005 with a database that was migrated to 2005 from SQL Server 2000. I have to alter a trigger on a table for some functionality changes, and when I modify the trigger and then access it through the application the database is working with, I receive this error:
There was a error in the [stored procedure name] procedure. Error Number: -2147217900 Error Description: [Microsoft][ODBC SQL Server Driver][SQL Server]The definition of object '[trigger name]' has changed since it was compiled.
[stored procedure name] and [trigger name] are where the actual names appear in the message.
I've tried running sp_recompile on the trigger, stored procedure, and table that are associated with this, and nothing works. I have dropped the trigger, which allows the save process to complete (but doesn't perform the required functionality, of course), and then re-created the trigger, but the error message still comes up. The compatibility level for the database is SQL Server 2000 (80) (as it was migrated from SQL Server 2000 as I mentioned above).
Has anyone seen this, and if so, how can I fix it?
Thanks in advance for your help!
Jay
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Dec 21, 2006
Help! I have posted this before and I had hoped that the VS2005 SP1 would help my problem. It didn't. My code is shown below. I have dropped a sqlconnection, sqldataadapter and a strongly-typed dataset from the toolbox onto the component designer for my page and written my code. It compiles without any errors but at runtine I receive the system error "Object reference not set to an instance of an object." The error occurs at the first line where the sqldataadapter is mentioned. I have shufflled the code and the error still occurs at first mention of the dataadapter. I have set parameters to a simple string such as "myemail." It hasn't helped. I have used the "Dim" statement as "Dim DaAuthorLogin as System.Data.SqlClient.SqlDataadapter and Dim DaAuthorLogin as New ......) at the start of the private sub generated by the event requiring the data. Nothing helps. Here is my simple code to select data from a sqlserver 2000 database. Why do I continue to get this error?
Partial Class AuthorLogin
Inherits System.Web.UI.Page
Protected WithEvents AuthorInformation As System.Web.UI.Page
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.SqlSelectCommand1 = New System.Data.SqlClient.SqlCommand
Me.DaAuthorLogin = New System.Data.SqlClient.SqlDataAdapter
Me.MDData = New System.Data.SqlClient.SqlConnection
Me.DsAuthorLogin = New MedicalDecisions.DsAuthorLogin
CType(Me.DsAuthorLogin, System.ComponentModel.ISupportInitialize).BeginInit()
'
'SqlSelectCommand1
'
Me.SqlSelectCommand1.CommandText = "SELECT AuthorAlias, AuthorEmail, AuthorPassword, LastName, PreferredName" & Global.Microsoft.VisualBasic.ChrW(13) & Global.Microsoft.VisualBasic.ChrW(10) & "FRO" & _
"M T_Author" & Global.Microsoft.VisualBasic.ChrW(13) & Global.Microsoft.VisualBasic.ChrW(10) & "WHERE (AuthorEmail = @AuthorEmail) AND (AuthorPassword =" & _
" @AuthorPassword)"
Me.SqlSelectCommand1.Connection = Me.MDData
Me.SqlSelectCommand1.Parameters.AddRange(New System.Data.SqlClient.SqlParameter() {New System.Data.SqlClient.SqlParameter("@AuthorEmail", System.Data.SqlDbType.NVarChar, 50, "AuthorEmail"), New System.Data.SqlClient.SqlParameter("@AuthorPassword", System.Data.SqlDbType.NVarChar, 50, "AuthorPassword")})
'
'DaAuthorLogin
'
Me.DaAuthorLogin.SelectCommand = Me.SqlSelectCommand1
Me.DaAuthorLogin.TableMappings.AddRange(New System.Data.Common.DataTableMapping() {New System.Data.Common.DataTableMapping("Table", "T_Author", New System.Data.Common.DataColumnMapping() {New System.Data.Common.DataColumnMapping("AuthorAlias", "AuthorAlias"), New System.Data.Common.DataColumnMapping("AuthorEmail", "AuthorEmail"), New System.Data.Common.DataColumnMapping("AuthorPassword", "AuthorPassword"), New System.Data.Common.DataColumnMapping("LastName", "LastName"), New System.Data.Common.DataColumnMapping("PreferredName", "PreferredName")})})
'
'MDData
'
Me.MDData.ConnectionString = "Data Source=CIS1022DAVID;Initial Catalog=CGData;Integrated Security=True;Pooling" & _
"=False"
Me.MDData.FireInfoMessageEventOnUserErrors = False
'
'DsAuthorLogin
'
Me.DsAuthorLogin.DataSetName = "DsAuthorLogin"
Me.DsAuthorLogin.SchemaSerializationMode = System.Data.SchemaSerializationMode.IncludeSchema
CType(Me.DsAuthorLogin, System.ComponentModel.ISupportInitialize).EndInit()
End Sub
Friend WithEvents SqlSelectCommand1 As System.Data.SqlClient.SqlCommand
Friend WithEvents MDData As System.Data.SqlClient.SqlConnection
Friend WithEvents DaAuthorLogin As System.Data.SqlClient.SqlDataAdapter
Friend WithEvents DsAuthorLogin As MedicalDecisions.DsAuthorLogin
'NOTE: The following placeholder declaration is required by the Web Form Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As System.Object
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs)
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
'no code here
End Sub
Private Sub AuthorLoginRegister_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AuthorLoginRegister.Click
'for new author registration
Response.Redirect("AuthorInformation.aspx")
End Sub
Private Sub AuthorLoginBack_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AuthorLoginBack.Click
'to navigate back
Response.Redirect("MainPaths.aspx")
End Sub
Protected Sub AuthorLoginPassword_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AuthorLoginPassword.TextChanged
'pass the parameters to the dataadapter and return dataset
DaAuthorLogin.SelectCommand.Parameters("@AuthorEmail").Value = AuthorLoginEmail.Text
DaAuthorLogin.SelectCommand.Parameters("@AuthorPassword").Value = AuthorLoginPassword.Text
MDData.Open()
DaAuthorLogin.Fill(DsAuthorLogin, "T_Author")
MDData.Close()
'set session objects
If DsAuthorLogin.T_Author.Rows.Count > 0 Then
Session("AuthorAlias") = DsAuthorLogin.T_Author(0).AuthorAlias
Session("LastName") = DsAuthorLogin.T_Author(0).LastName
Session("PreferredName") = DsAuthorLogin.T_Author(0).PreferredName
Response.Redirect("AuthorPaths.aspx")
Else : AuthorLoginNotValid.Visible = True
AuthorLoginEmail.Text = ""
AuthorLoginPassword.Text = ""
End If
End Sub
End Class
Thanks in advance,
David
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Sep 12, 2006
Anyone know what this error means and how to get rid of it?
Public Sub Main()
Dim myMessage As Net.Mail.MailMessage
Dim mySmtpClient As Net.Mail.SmtpClient
myMessage.To(20) = New Net.Mail.MailAddress(me@hotmail.com)
myMessage.From = New Net.Mail.MailAddress(someone@microsoft.com)
myMessage.Subject = "as;dlfjsdf"
myMessage.Priority = Net.Mail.MailPriority.High
mySmtpClient = New Net.Mail.SmtpClient("microsoft.com")
mySmtpClient.Send(myMessage)
Dts.TaskResult = Dts.Results.Success
End Sub
Thanks,
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Mar 17, 2008
Hi,
I am trying to develop a custom algorithm. I have implemented and tested training methods, however I fail at prediction phase. When I try to run a prediction query against a model created with my algorithm I get:
Executing the query ...
Obtained object of type: Microsoft.AnalysisServices.AdomdClient.AdomdDataReader
COM error: COM error: DMPluginWrapper; Object reference not set to an instance of an object..
Execution complete
I know this is not very descriptive, but I have seen that algorith doesn't even executes my Predict(..) function (I can test this by logging to a text file)
So the problem is this, when I run prediction query DMPluginWrapper gives exception -I think- even before calling my custom method.
As I said it is not a very descriptive message but I hope I have hit a general issue.
Thanks...
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Apr 2, 2008
I am trying to send some data back to our as/400 from SQL server. Before I do so I need to delete entries from the table. I have an odbc connection set up and have used it sucessfully in a datareader compoenent but but when I try to use it for a delete SQL task it give me the followign error. what am I doing wrong? I even tried hardcoding in the system name/library name.
Here is my delete sql script
DELETE FROM DSSCNTL Where Companycode = 10
TITLE: SQL Task
------------------------------
Object reference not set to an instance of an object.
------------------------------
BUTTONS:
OK
------------------------------
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Feb 15, 2007
When I try and run Report Builder Reports i get this error message "Object reference not set to an instance of an object. "
I can run reports locally but not from Report manager
here is the stack trace info
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[NullReferenceException: Object reference not set to an instance of an object.]
Microsoft.Reporting.WebForms.WebRequestHelper.GetExceptionForMoreInformationNode(XmlNode moreInfo, XmlNamespaceManager namespaces) +18
Microsoft.Reporting.WebForms.WebRequestHelper.ExceptionFromWebResponse(Exception e) +358
Microsoft.Reporting.WebForms.ServerReport.ServerUrlRequest(Boolean isAbortable, String url, Stream outputStream, String& mimeType, String& fileNameExtension) +482
Microsoft.Reporting.WebForms.ServerReport.InternalRender(Boolean isAbortable, String format, String deviceInfo, NameValueCollection urlAccessParameters, Stream reportStream, String& mimeType, String& fileNameExtension) +958
Microsoft.Reporting.WebForms.ServerReportControlSource.RenderReport(String format, String deviceInfo, NameValueCollection additionalParams, String& mimeType, String& fileExtension) +84
Microsoft.Reporting.WebForms.ExportOperation.PerformOperation(NameValueCollection urlQuery, HttpResponse response) +143
Microsoft.Reporting.WebForms.HttpHandler.ProcessRequest(HttpContext context) +75
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +154
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64
Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.210
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May 13, 2015
Getting the following error-message:
OS: Windows Server 2008 R2 Standard
64bit
Office 2010
Power Pivot Tables are fed by Power Query queries.
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Apr 8, 2008
Hi Everyone,
Please help me on this issue. I'm a new SSIS User.
I've installed Sql Server 2005 Developer Edition
When I create a new SSIS Project in Business Intelligence Development Studio,
I get the following message:
"Microsoft Visual Studio is unable to load this document: Object reference is not set to an instance of an object".
Error loading 'package.dtsx'bject reference is not set to an instance of an object
When I try to debug the package, I get the below message:
parameter Component(System.Design) is null.
I've uninstalled and installed SS 2005 several times, yet the problem persists.
Please help.
This is the package.dtsx
<?xml version="1.0"?><DTS:Executable xmlnsTS="www.microsoft.com/SqlServer/Dts" DTS:ExecutableType="MSDTS.Package.1"><DTSroperty DTS:Name="PackageFormatVersion">2</DTSroperty><DTSroperty DTS:Name="VersionComments"></DTSroperty><DTSroperty DTS:Name="CreatorName">USkothand1</DTSroperty><DTSroperty DTS:Name="CreatorComputerName">US6051KOTHAND1</DTSroperty><DTSroperty DTS:Name="CreationDate" DTSataType="7">4/8/2008 10:53:39 AM</DTSroperty><DTSroperty DTS:Name="PackageType">5</DTSroperty><DTSroperty DTS:Name="ProtectionLevel">1</DTSroperty><DTSroperty DTS:Name="MaxConcurrentExecutables">-1</DTSroperty><DTSroperty DTS:Name="PackagePriorityClass">0</DTSroperty><DTSroperty DTS:Name="VersionMajor">1</DTSroperty><DTSroperty DTS:Name="VersionMinor">0</DTSroperty><DTSroperty DTS:Name="VersionBuild">0</DTSroperty><DTSroperty DTS:Name="VersionGUID">{FBD98635-EDDE-4F58-9D53-356E8CB653FB}</DTSroperty><DTSroperty DTS:Name="EnableConfig">0</DTSroperty><DTSroperty DTS:Name="CheckpointFileName"></DTSroperty><DTSroperty DTS:Name="SaveCheckpoints">0</DTSroperty><DTSroperty DTS:Name="CheckpointUsage">0</DTSroperty><DTSroperty DTS:Name="SuppressConfigurationWarnings">0</DTSroperty><DTSroperty DTS:Name="ForceExecValue">0</DTSroperty><DTSroperty DTS:Name="ExecValue" DTSataType="3">0</DTSroperty><DTSroperty DTS:Name="ForceExecutionResult">-1</DTSroperty><DTSroperty DTS:Name="Disabled">0</DTSroperty><DTSroperty DTS:Name="FailPackageOnFailure">0</DTSroperty><DTSroperty DTS:Name="FailParentOnFailure">0</DTSroperty><DTSroperty DTS:Name="MaxErrorCount">1</DTSroperty><DTSroperty DTS:Name="ISOLevel">1048576</DTSroperty><DTSroperty DTS:Name="LocaleID">1033</DTSroperty><DTSroperty DTS:Name="TransactionOption">1</DTSroperty><DTSroperty DTS:Name="DelayValidation">0</DTSroperty>
<DTS:LoggingOptions><DTSroperty DTS:Name="LoggingMode">0</DTSroperty><DTSroperty DTS:Name="FilterKind">1</DTSroperty><DTSroperty DTS:Name="EventFilter" DTSataType="8"></DTSroperty></DTS:LoggingOptions><DTSroperty DTS:Name="ObjectName">Package</DTSroperty><DTSroperty DTS:Name="DTSID">{191D188C-EA6E-46D6-A46A-8C9F3C21C321}</DTSroperty><DTSroperty DTS:Name="Description"></DTSroperty><DTSroperty DTS:Name="CreationName">MSDTS.Package.1</DTSroperty><DTSroperty DTS:Name="DisableEventHandlers">0</DTSroperty></DTS:Executable>
Thanks
Best Regards
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May 27, 2008
Hi All,
i have a table in MS Access with CandidateId and Image column. Image column is in OLE object format. i need to move this to SQL server 2005 with CandidateId column with integer and candidate Image column to Image datatype.
its very udgent, i need any tool to move this to SQL server 2005 or i need a code to move this table from MS Access to SQL server 2005 in C#.
please do the needfull ASAP. waiting for your reply
with regards
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May 22, 2008
Just installed VS 2005 & SQLServer 2005 clients on my workstation. When trying to create a new Integration Services Project and start work in the designer receive the MICROSOFT VISUAL STUDIO 'Object reference not set to an instance of an object.' dialog box with message "Creating project 'Integration Services project1'...project creation failed."
Previously I had SQLServer 2000 client with the little VS tool that came with it installed. Uninstalled these prior to installing the 2005 tools (VS and SQLServer).
I'm not finding any information on corrective action for this error.
Any one have this problem and found the solution?
Thanks,
CLC
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Dec 28, 2004
Each time I press submit to insert data into the database I receive the following message. I use the same code on another page and it works fine. Here is the error:
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
Line 125: MyCommand.Parameters("@Balance").Value = txtBalance.Text
Line 126:
Line 127: MyCommand.Connection.Open()
Line 128:
Line 129: Try
Source File: c:inetpubwwwrootCreditRepairCreditor_Default.aspx.vb Line: 127
Stack Trace:
[NullReferenceException: Object reference not set to an instance of an object.]
CreditRepair.CreditRepair.Vb.Creditor_Default.btnSaveAdd_Click(Object sender, EventArgs e) in c:inetpubwwwrootCreditRepairCreditor_Default.aspx.vb:127
System.Web.UI.WebControls.Button.OnClick(EventArgs e)
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
System.Web.UI.Page.ProcessRequestMain()
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
If (Page.IsValid) Then
Dim DS As DataSet
Dim MyCommand As SqlCommand
Dim AddAccount As String = "insert into AccountDetails (Account_ID, Report_ID, Balance) values (@Account_ID, @Report_ID, @Balance)"
MyCommand = New SqlCommand(AddAccount, MyConnection)
MyCommand.Parameters.Add(New SqlParameter("@Account_ID", SqlDbType.Char, 50))
MyCommand.Parameters("@Account_ID").Value = txtAccount_ID.Text
MyCommand.Parameters.Add(New SqlParameter("@Report_ID", SqlDbType.Char, 50))
MyCommand.Parameters("@Report_ID").Value = txtReport_ID.Text
MyCommand.Parameters.Add(New SqlParameter("@Balance", SqlDbType.Char, 50))
MyCommand.Parameters("@Balance").Value = txtBalance.Text
MyCommand.Connection.Open()
MyCommand.ExecuteNonQuery()
Response.Redirect("Customer_Details.aspx?SS='CustHeadGrid.Columns[0].Item.lblSS.Text)")
MyCommand.Connection.Close()
End If
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Sep 13, 2006
I am trying to execute this code feom Script task while excuting its giving me error that "Object reference not set to an instance of an object." The assemblies Iam referening in this code are there in GAC. Any idea abt this.
Thanks,
Public Sub Main()
Dim remoteUri As String
Dim fireAgain As Boolean
Dim uriVarName As String
Dim fileVarName As String
Dim httpConnection As Microsoft.SqlServer.Dts.Runtime.HttpClientConnection
Dim emptyBytes(0) As Byte
Dim SessionID As String
Dim CusAuth As CustomAuth
Try
' Determine the correct variables to read for URI and filename
uriVarName = "vsReportUri"
fileVarName = "vsReportDownloadFilename"
' create SessionID for use with HD Custom authentication
CusAuth = New CustomAuth(ASCIIEncoding.ASCII.GetBytes(Dts.Variables("in_vsBatchKey").Value.ToString()))
Dts.Variables(uriVarName).Value = Dts.Variables(uriVarName).Value.ToString() + "&" + _
"BeginDate=" + Dts.Variables("in_vsBeginDate").Value.ToString() + "&" + _
"EndDate=" + Dts.Variables("in_vsEndDate").Value.ToString()
Dim request As HttpWebRequest = CType(WebRequest.Create(Dts.Variables(uriVarName).Value.ToString()), HttpWebRequest)
'Set credentials based on the credentials found in the variables
request.Credentials = New NetworkCredential(Dts.Variables("in_vsReportUsername").Value.ToString(), _
Dts.Variables("in_vsReportPassword").Value.ToString(), _
Dts.Variables("in_vsReportDomain").Value.ToString())
'Place the custom authentication session ID in a cookie called BatchSession
request.CookieContainer.Add(New Cookie("BatchSession", CusAuth.GenerateSession("EmailAlertingSSIS"), "/", Dts.Variables("in_vsReportDomain").Value.ToString()))
' Set some reasonable limits on resources used by this request
request.MaximumAutomaticRedirections = 4
request.MaximumResponseHeadersLength = 4
' Prepare to download, write messages indicating download start
Dts.Events.FireInformation(0, String.Empty, String.Format("Downloading '{0}' from '{1}'", _
Dts.Variables(fileVarName).Value.ToString(), Dts.Variables(uriVarName).Value.ToString()), String.Empty, 0, fireAgain)
Dts.Log(String.Format("Downloading '{0}' from '{1}'", Dts.Variables(fileVarName).Value.ToString(), Dts.Variables(uriVarName).Value.ToString()), 0, emptyBytes)
' Download data
Dim response As HttpWebResponse = CType(request.GetResponse(), HttpWebResponse)
' Get the stream associated with the response.
Dim receiveStream As Stream = response.GetResponseStream()
' Pipes the stream to a higher level stream reader with the required encoding format.
Dim readStream As New StreamReader(receiveStream, Encoding.UTF8)
Dim fileStream As New StreamWriter(Dts.Variables(fileVarName).Value.ToString())
fileStream.Write(readStream.ReadToEnd())
fileStream.Flush()
fileStream.Close()
readStream.Close()
fileStream.Dispose()
readStream.Dispose()
'Download the file and report success
Dts.TaskResult = Dts.Results.Success
Catch ex As Exception
' post the error message we got back.
Dts.Events.FireError(0, String.Empty, ex.Message, String.Empty, 0)
Dts.TaskResult = Dts.Results.Failure
End Try
End Sub
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Nov 14, 2006
Hi all,
I'm getting this problem 'Object reference not set to an instance of an object.' whenever I try to review a report and I checked the log file and this is what it had
w3wp!ui!1!11/14/2006-10:54:20:: Unhandled exception: System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.Reporting.WebForms.WebRequestHelper.GetExceptionForMoreInformationNode(XmlNode moreInfo, XmlNamespaceManager namespaces)
at Microsoft.Reporting.WebForms.WebRequestHelper.ExceptionFromWebResponse(Exception e)
at Microsoft.Reporting.WebForms.ServerReport.ServerUrlRequest(Boolean isAbortable, String url, Stream outputStream, String& mimeType, String& fileNameExtension)
at Microsoft.Reporting.WebForms.ServerReport.GetStyleSheet(String styleSheetName)
at Microsoft.Reporting.WebForms.ReportServerStyleSheetOperation.PerformOperation(NameValueCollection urlQuery, HttpResponse response)
at Microsoft.Reporting.WebForms.HttpHandler.ProcessRequest(HttpContext context)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
Some previous forums stated checking the webconfig file but the web config file look okay. Is there another way to fix this.
Much Thanks,
Carl
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Jan 14, 2008
Hello -
For the life of me I cannot figure out why i'm getting the "Object Refence Not Set To an Instance of An Object" error after I try and create a Report Services project in Business Intelligence Studio. I've followed all of the steps in similar posts such as checking the ReportServer/web.config file but everything checks out.
Does anyone have any other ideas as to how I can get rid of this annoying error and start creating some reports?
Thanks!!!
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Dec 27, 2007
Hello,
I've ran into trouble while creating a rather simple transformation script component (one input, one output). The only thing it has to do is test the values coming from it's input rows and set the values of the output rows according to some rules; something like:
Code Block
Public Overrides Sub InputBrowser_ProcessInputRow(ByVal Row As InputBrowserBuffer)
If Row.UserAgent.Contains("MSIE") Then 'test input
Row.BrowserName = "Internet Explorer" 'set output
End If
End Sub
This raises an "Object reference not set to an instance of an object." exception. Commenting out the input (Row.UserAgent) solves the exception, but I actually do need to test the contents of the input row (and by leaving only the output manipulation, the script won't reach it's end, the components remain yellow). What can I do about this?
Thanks in advance!
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Feb 18, 2007
Hi, I am deploying my web through a web hosting services which provides SQL database support. I got following errors whenever I try to open my webpage,which never happen when I run my web on the local machine. I have my connection string configured in my web.config as below:
<add name="ArtHouseConnection" connectionString="Server=serveripaddress; Integrated Security=True; Database=arteh3_database;User Id=username;Password=password;" providerName="System.Data.SqlClient"/>
<add name="ASPNETDBConnectionString1" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|ASPNETDB.MDF;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient"/>
This is the source code where error was generated:
public static class ArtHouseConfiguration
{
//cache connection string
private readonly static string dbConnectionString;
//cache data provider name
private readonly static string dbProviderName;
private readonly static string siteName;
//initialize constructor properties
static ArtHouseConfiguration()
{
dbConnectionString = ConfigurationManager.ConnectionStrings["ArtHouseConnection"].ConnectionString;
dbProviderName = ConfigurationManager.ConnectionStrings["ArtHouseConnection"].ProviderName;
siteName = ConfigurationManager.AppSettings["SiteName"];
}
and finally this is the error mg I got:
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.Source Error:
Line 30: static ArtHouseConfiguration()
Line 31: {
Line 32: dbConnectionString = ConfigurationManager.ConnectionStrings["ArtHouseConnection"].ConnectionString;
Line 33: dbProviderName = ConfigurationManager.ConnectionStrings["ArtHouseConnection"].ProviderName;
Line 34:
Source File: d:inetpubvhostsartehouse.orghttpdocsApp_CodeArtHouseConfiguration.cs Line: 32 Stack Trace:
[NullReferenceException: Object reference not set to an instance of an object.]
ArtHouseConfiguration..cctor() in d:inetpubvhostsartehouse.orghttpdocsApp_CodeArtHouseConfiguration.cs:32
[TypeInitializationException: The type initializer for 'ArtHouseConfiguration' threw an exception.]
ArtHouseConfiguration.get_EnableErrorLogEmail() in d:inetpubvhostsartehouse.orghttpdocsApp_CodeArtHouseConfiguration.cs:74
Utilities.LogError(Exception ex) in d:inetpubvhostsartehouse.orghttpdocsApp_CodeUtilities.cs:100
ASP.global_asax.Application_Error(Object sender, EventArgs e) in d:inetpubvhostsartehouse.orghttpdocsGlobal.asax:20
System.EventHandler.Invoke(Object sender, EventArgs e) +0
System.Web.HttpApplication.RaiseOnError() +182
Anyone got any ideas? thank you!
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Jan 2, 2008
Hi,
I am using a stored procedure and places the value into a dataset.
But it prompts me an error.
And here is my code:
Dim cmd As New SqlCommand("testProc", mySqlConnection)
cmd.CommandType = CommandType.StoredProcedure
cmd.Parameters.Add("@PrdCode", SqlDbType.VarChar, 50).Value = strBonPrdCode
cmd.Parameters.Add("@keyWord", SqlDbType.VarChar, 250).Value = srchKeyword
cmd.Parameters.Add("@keyWord_Count", SqlDbType.Int).Value = Keyword_count
Dim da As New SqlDataAdapter(cmd)
Dim ds As New DataSet
da.Fill(ds, "Results")
recCount = ds.Tables("Results").Rows.Count
Can you give me a solution to solve this problem. Thanking you in advance.
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