Performance Sqlclient Data Provider
Dec 12, 2005
Well, I hope, after my endless search in the web... maybe, somebody can help me here.
I'm passing a application to a web-based application, therefore I have to use ADO.net to access a sql server DB. But the performance is extremly poor!!!!
Just to compare: with the normal application or with the SQL Query Analyzer, the query needs about 2 seconds. Well, by using ado.net, it's about 200 seconds......!!!!
Of course, the query is quite long. But the difference is extrem... too extrem for using the same query....
I already tried a lot... actually everything I found on the web. What is really strange is that neither the processor nor the memory is fully used... And the web server use more of the cpu power than the sql server itself (the 2 server are still on my machine where I'm programming). So, could it be that the problem is by filling up the dataset with the sqladapter or something similar?
Thx for your help!!
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Jun 26, 2007
Hi,
After reading this helpful blog entry:
http://blogs.msdn.com/sql_protocols/archive/2007/05/13/sql-network-interfaces-error-26-error-locating-server-instance-specified.aspx
I think this might be a good place to ask the following question.
I am writing the error handling code for my data access layer for a web application. I am using the Enterprise Library Data Access Application Block. Although this supports generic database connections, I realized that I need to handle errors specific to each database type. Microsoft SQL is the only database type I am using for now, so I am using a try...catch (SqlException e).
In testing my code, I intentionally changed the instance name in web.config to a name that does not exist. I get the very popular error 26 - Error Locating Server/Instance Specified. This is returned as a SqlException, but the SqlError.Number property is set to -1.
Am I getting "-1" because the provider hasn't actually connected to SQL yet, so it doesn't have an actual SQL error number?
Can I assume that (SqlError.Number == -1) is always a fatal, provider-level connection exception?
Will the provider ever use another SqlError.Number of its own? Or do all numbers besides -1 come from the SQL sysmessages table?.
Is there a comprehensive list of what exceptions might be raised by the SqlClient provider, including #26?
The reason for all the questions is that in a web application, I want to prevent the end-user from seeing the "real" exception if it has to do with configuration errors. However, maybe there are other errors that the user should see and handle? It's hard to know without a full list of SqlClient provider errors, along with the SqlError.Number that each error maps to.
Thanks and regards,
Mark
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Mar 18, 2008
While learning ASP.net 2.0, I was taught that the the default provider for the SqlDataSource was System.Data.SqlClient, and that I only needed to specify it as a provider when I put it in the web.config file. However, now (in VWDE 2008) when I add a SqlDataSource to a page, it adds ProviderName="System.Data.SqlClient". Does this mean that it isnt the default anymore?
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Nov 2, 2006
Hi,
Does anyone else have this error message pop up in SSMS when you try to parse sql statements:
.Net SqlClient Data Provider: Msg 0, Level 11, State 0, Line 0
A severe error occurred on the current command. The results, if any, should be discarded.
There was a thread back in March 2006 that mentioned this error, but the posted resolution was to install SP1. I have SP1 installed but I still get the error.
I only receive the error when I'm parsing statements, if I run the statement it's fine.
Thanks
Matt
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May 26, 2007
trying to connect to sql server 2005 over the internet. (its a third paty hosting company i'm using)
so i have to connect via tcp/ip using sql server authentication.
my laptop is running vista.
the version of sql server 2005 on my laptopis developer edition with service pack 2.
it worked fine from windows xp and the connection details are valid as it runa fine from .net on the hosting website.
i have added sql serer managemnt studio to the exceptions list in the firewall.
ihave made sure tcpip is enabled in the sql server connection management console.
i have also enabled it in the cliconfg tool
firewall on/off seems to make no difference.
its almost enough to make you turn to oracle and thats saying something considering how long i've been in the microsoft camp...
the error returned is:
Login failed for user 'SQL2005_152092_garethbowen'. (.Net SqlClient Data Provider)
------------------------------
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=18456&LinkId=20476
------------------------------
Server Name: 'xxxx',1433
Error Number: 18456
Severity: 14
State: 1
Line Number: 65536
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Jun 8, 2007
All,
One of our developers decided to load 2K5 client tools on to their laptop. They cannot connect getting the following error:
....Error: 26 Error Locating the Server/instance specified (.NET SQLClient Data Provider)....
1.) Allowing remote connections IS enabled.
2.) SQL Browser Service is ON
3.) Windows Firewall is NOT running
4.) All protocols (except VIA) are enabled
Others at this office, including myself, can connect fine in Management Studio. Only this one developer cannot.
Any thoughts and/or help would be much appreciated. I think that the problem has something to do with the first sentance above but I am not positive.
Thanks in advance,
DBA Ben
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Jan 19, 2007
Hi,
I am using VS2005 and Sql Server 2000 (personal edition). I am able to connect with SqlClient Provider on Local Machine (when db server and VS2005 on same machine). But I try to connect SqlServer on different machine it is not allowing me to connect. If I use SqlOledb Provider it got connected.
Please tell me how could I connect with DB server (Sql Server 2000) from remote machine.
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Apr 16, 2008
Hi when i try and open a database in sql server management studio i get the error "Cannot open user default database. Login failed. Login failed for user 'DOMAINUser'. (.Net SqlClient Data Provider)", what can i do to rectify this, i have googled around and still havent found no answers.
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Aug 31, 2004
Hi There,
I'm using C# to get a value for a DOUBLE precision variable, called "Length", from a textBox using the following line:
Length = Convert.ToDouble( txtLength.Text )
I'm also using the following lines to prepare my stored procedure call:
arParms[9] = new SqlParameter("@Length", SqlDbType.Decimal, 5);
arParms[9].Value = record.Length;
My stored procedure has the following parameter definition:
@Length decimal(9,3)
My problem is that if someone types a value bigger than 999999 in the textbox he will get for sure the following error:
System.Data.SqlClient.SqlException: Error converting data type numeric to decimal.
I don't know how to either make sql or C# to truncate the value or catch the exception to automatically assign 0 to the parameter.
Please Help.
Moshe
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Aug 31, 2006
I am using a stored procedure which returns a value of charecter datatype 'V' to the calling program.I am getting an sql exception System.Data.SqlClient.SqlException: Syntax error converting the varchar value 'V' to a column of data type inti didnot define any int datatype in my tablethis is my codeSqlCommand com = new SqlCommand("StoredProcedure4", connection);com.CommandType = CommandType.StoredProcedure; SqlParameter p1 = com.Parameters.Add("@uname", SqlDbType.NVarChar);SqlParameter p2 = com.Parameters.Add("@opwd", SqlDbType.NVarChar);SqlParameter p3 = com.Parameters.Add("@role", SqlDbType.NVarChar);p3.Direction = ParameterDirection.ReturnValue;p1.Value = username.Text.Trim();p2.Value = password.Text.Trim();com.ExecuteReader();lblerror2.Text = (string)(com.Parameters["@role"].Value); can your figure out what is the error ? Is it a coding error or error of the databse
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Mar 20, 2004
Aaarrgghhhhhhh, still searchin' for a nice step-by-step article to learn data access (all insert delete update commands) with the SQL Server .NET Data Provider found in [System.Data.SqlClient] namespace....
Can anyone plz help me to find it?
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Aug 17, 2007
Hi!
I have just installed Microsoft OLEDB provider for DB2 on a SQL server 2005. I created a Linked server against our DB2 V.8 Z/OS database. I tested the connection via execution of a simple select call, something like:
SELECT FIELD_A FROM DB2SRV.DB2DB.CREATOR_A.TABLE_A
WHERE FIELD_A='ABC'
I traced the call on the DB2 site. The SQL running on DB2 site was to my surprise without the €śwhere clause€?:
SELECT FIELD_A FROM DB2DB.CREATOR_A.TABLE_A
So, all rows are moved to SQL server before the where clause is executed, resulting in bad performance. The index on FIELD_A is not used and so on €¦ !
If anyone out there has an idea of what could be wrong, please let me know!
NB. I know that by using OPENQUERY pass-through query, all execution is done on the DB2 site.
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Sep 22, 2007
i have installed visual express and sql express.
but the problem is i want to add the connection string manuallty in visual studio express 2005.
so i want to add a reference of sql.data.sqlclient but could not add ?
i am not sure what is the problem or is am i missing anything
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Feb 1, 2008
I am not able to add the namespace "system.data.SqlClient" and not able to get the intellisense for sqlconnections. I have only vs2005. i do not have sql management express
or sql server 2005
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Feb 19, 2004
Hi All,
I am new to ASP.NET and trying to learn. I am getting the problem when I try to insert data into SQL. The exception that I am getting is
Exception Details: System.Data.SqlClient.SqlException: An explicit value for the
identity column in table 'Customers' can only be specified when a column list is used and IDENTITY_INSERT is ON.
My table name is 'Customers' and its as below.
-----------------------------------------------------------------------
CustomerID--numeric---Identity Seed is 1000---Identity Increment is 1---No Nulls.
Name--------varchar---No Nulls.
address------Varchar---No Nulls.
State--------Varchar---No Nulls.
Zip-----------VarcHar---No Nulls.
PhoneNumber-Varchar---No Nulls.
Email---------Varchar---No Nulls.
and my code is (No fun of my code please--I am a learner)
-----------------------------------------------------------------------
Imports System.Data
Imports System.Data.SqlClient
Public Class register
Inherits System.Web.UI.Page
Protected WithEvents cnNWind As SqlConnection
'Protected drCustomers As SqlDataReader
Protected WithEvents lbladd As System.Web.UI.WebControls.Label
Protected WithEvents lblState As System.Web.UI.WebControls.Label
Protected WithEvents lblcity As System.Web.UI.WebControls.Label
Protected WithEvents lblzip As System.Web.UI.WebControls.Label
Protected WithEvents lblPhone As System.Web.UI.WebControls.Label
Protected WithEvents lblEmail As System.Web.UI.WebControls.Label
Protected WithEvents TxtName As System.Web.UI.WebControls.TextBox
Protected WithEvents txtAdd As System.Web.UI.WebControls.TextBox
Protected WithEvents txtState As System.Web.UI.WebControls.TextBox
Protected WithEvents txtCity As System.Web.UI.WebControls.TextBox
Protected WithEvents txtZip As System.Web.UI.WebControls.TextBox
Protected WithEvents txtPhone As System.Web.UI.WebControls.TextBox
Protected WithEvents TxtEmail As System.Web.UI.WebControls.TextBox
Protected WithEvents BtnSubmit As System.Web.UI.WebControls.Button
Protected WithEvents Label1 As System.Web.UI.WebControls.Label
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
End Sub
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
'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 System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
End Sub
Private Sub BtnSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BtnSubmit.Click
cnNWind = New SqlConnection()
cnNWind.ConnectionString = "Data Source=(local); Initial Catalog=cart; Integrated Security=SSPI"
cnNWind.Open()
If cnNWind.State = ConnectionState.Open Then
Dim cmCustomers As New SqlCommand("INSERT INTO Customers VALUES ('',' " & TxtName.Text & "','" & txtAdd.Text & "','" & txtState.Text & "','" & txtZip.Text & "','" & txtPhone.Text & "','" & TxtEmail.Text & "')", cnNWind)
cmCustomers.ExecuteNonQuery()
cmCustomers.ExecuteNonQuery()
cnNWind.Close()
End If
End Sub
End Class
The Error I am getting:
-----------------------------------------------------------------------
Server Error in '/SCart' Application.
--------------------------------------------------------------------------------
An explicit value for the identity column in table 'Customers' can only be specified when a column list is used and IDENTITY_INSERT is ON.
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.Data.SqlClient.SqlException: An explicit value for the identity column in table 'Customers' can only be specified when a column list is used and IDENTITY_INSERT is ON.
Source Error:
Line 46: If cnNWind.State = ConnectionState.Open Then
Line 47: Dim cmCustomers As New SqlCommand("INSERT INTO Customers VALUES ('','" & TxtName.Text & "','" & txtAdd.Text & "','" & txtState.Text & "','" & txtZip.Text & "','" & txtPhone.Text & "','" & TxtEmail.Text & "')", cnNWind)
Line 48: cmCustomers.ExecuteNonQuery()
Line 49: cnNWind.Close()
Line 50: End If
Source File: d:inetpubwwwrootSCart
egister.aspx.vb Line: 48
Stack Trace:
[SqlException: An explicit value for the identity column in table 'Customers' can only be specified when a column list is used and IDENTITY_INSERT is ON.]
System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
SCart.register.BtnSubmit_Click(Object sender, EventArgs e) in d:inetpubwwwrootSCart
egister.aspx.vb:48
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()
--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:1.1.4322.573; ASP.NET Version:1.1.4322.573
The code works fine If I Dont use Identity Column, But I need to use Identity Column in my Project :( ...Please Help.
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Apr 14, 2007
I'm trying to retrieve an image from my ms sql server 2005, and i'm using VS2005....however, i have the following error during the compilation process Code in webform2.aspx.vb:Partial Class webform2 Inherits System.Web.UI.Page Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim connstr As String = "Data Source=DCPRJ007SQLEXPRESS;Initial Catalog=mydatabase;Integrated Security=True" Dim cnn As New Data.SqlClient.SqlConnection(connstr) Dim cmd As New Data.SqlClient.SqlCommand("select * from dbo.images where id=" & Request.QueryString("id"), cnn) cnn.Open() Dim dr As Data.SqlClient.SqlDataReader = cmd.ExecuteReader() Dim bindata() As Byte = dr.GetValue(1) Response.BinaryWrite(bindata) End SubEnd Class System.Data.SqlClient.SqlException was unhandled by user code Class=15 ErrorCode=-2146232060 LineNumber=1 Message="Incorrect syntax near '='." Number=102 Procedure="" Server="DCPRJ007SQLEXPRESS" Source=".Net SqlClient Data Provider" State=1 StackTrace: at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlDataReader.ConsumeMetaData() at System.Data.SqlClient.SqlDataReader.get_MetaData() at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader() at webform2.Page_Load(Object sender, EventArgs e) in C:Documents and SettingsAdministratorMy DocumentsVisual Studio 2005WebSitesWebSite7webform2.aspx.vb:line 10 at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
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Nov 7, 2007
im getting this error when i try to access the application from the network. but in my computer work fine
Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
please help... thanxs
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Jul 2, 2006
Hi,
I had make one Desktop application in VB.net, having 6 threads simultaneously running. And each thread connect to sql server and stored the value in DB at every one second. Now my problem is that when I start the application its working fine but after 20-30 minutes exception is occuring.
Login failed for user 'sa'.
Exception StackTrace:
at System.Data.SqlClient.ConnectionPool.CreateConnection()
at System.Data.SqlClient.ConnectionPool.PoolCreateRequest(Object state)
can anybody help me
- Hiren
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Jul 12, 2006
I download the DAAB CF version. However, most of them use SQLCEClient to connect to the database. Is there any DAAB that use SQLClient?
One workaround that I made is I replaced all SQLCEClient objects with the SQLClient objects. I only test one method "ExecuteDataset" and it works so far. However, my question is "does my workaround a good solution?"
Thanks,
Hendra
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Jul 13, 2006
Hi All,
I have a form (asp website with the default.aspx and default.aspx.cs) which I use to connect to the SQL Server 2005 database and insert, update,get and delete data to and from it. In the table I have a column called Picture to insert a photo (usually bmp files) which I declared as a varbinary(max). ID is the primary key and is an int (i tried it to be numeric & varchar).
I am trying to insert data into the table using a form with this syntax:
SqlConnection enter_conn = new SqlConnection("user id=;" +
"password=;server=servername;" +
"Trusted_Connection=yes;" +
"database=Member Profiles; " +
"connection timeout=30");
enter_conn.Open();
string insertSql = "Insert dbo.Details(ID,Last_Name,First_Name,Middle_Initial,Project, Organization,Manager,Current_Skills,Biography,Hobbies, Picture) Select 1001, 'ABC','XYZ','R',' Website Development','ACT',LKM','ASP.Net, C#.Net, SQL Server 2005, SharePoint, Java, ',' developing the new website for ACT using SharePoint and SQL Server 2005', ' Singing, Listening to Music, Dancing, Cooking, Swimming', BulkColumn from Openrowset( Bulk 'C:\photos\rose.bmp', Single_Blob) as Picture";
SqlCommand myCommand = new SqlCommand(insertSql, enter_conn);
int i = myCommand.ExecuteNonQuery();
I have no data in the table and am doing the first insert. Though the data gets inserted I am getting this exception:
System.Data.SqlClient.SqlException: Violation of PRIMARY KEY constraint 'PK_Details'. Cannot insert duplicate key in object 'dbo.Details'. The statement has been terminated. at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async) at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) at System.Data.SqlClient.SqlCommand.ExecuteNonQuery() at _Default.Enter_Click(Object sender, EventArgs e) in c:Documents and SettingskrkondaXMy DocumentsVisual Studio 2005WebSitesMember ProfilesDefault.aspx.cs:line 82
Can someone please suggest anything???? I appreciate a quick response please!!!!
Thanks,
Kavya
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Dec 19, 2006
I am getting this error message
System.Data.SqlClient.SqlException: Invalid object name 'RacingHeritage'
I have noticed from other posts where the database owner is the login name
I rebuilt the table and the owner is now dbo
Here is the Code
Function GetCustomers() As System.Data.DataSet Dim connectionString As String = Application("HiddenConnection") Dim dbConnection As System.Data.IDbConnection = New System.Data.SqlClient.SqlConnection(connectionString)
Dim queryString As String = "SELECT [RacingHeritage].[RHID], [RacingHeritage].[UserID], [RacingHeritage].[Clie"& _ "ntFirstName] FROM [RacingHeritage]" Dim dbCommand As System.Data.IDbCommand = New System.Data.SqlClient.SqlCommand dbCommand.CommandText = queryString dbCommand.Connection = dbConnection
Dim dataAdapter As System.Data.IDbDataAdapter = New System.Data.SqlClient.SqlDataAdapter dataAdapter.SelectCommand = dbCommand Dim dataSet As System.Data.DataSet = New System.Data.DataSet dataAdapter.Fill(dataSet)
Return dataSet End Function
Any Ideas
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May 15, 2007
Hello,
we have asp.net apps on a windows 2003 server that connect to an instance of sql server 2005 enterprise edition on another windows 2003 server. We get this error at random times. Anyone know what could be causing it?
System.Web.HttpUnhandledException: Exception of type System.Web.HttpUnhandledException was thrown. ---> System.Data.SqlClient.SqlException: SSL Security error. at System.Data.SqlClient.ConnectionPool.GetConnection(Boolean& isInTransaction) at System.Data.SqlClient.SqlConnectionPoolManager.GetPooledConnection(SqlConnectionString options, Boolean& isInTransaction) at System.Data.SqlClient.SqlConnection.Open()Thanks
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Jul 26, 2007
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:NWHCConnectionString %>" SelectCommand="SELECT * FROM [AI_news]" OnSelecting="SqlDataSource1_Selecting"> </asp:SqlDataSource> This is my code, I have followed the wizard perfectly the way its supposed ot be, well not 100% perfectly. This is how its supposed to be. When using a XXXX.MDF file I could use the wizard and it works fine. I do not know why my above code won't work. I am connected to the database and can view code manually. but not on a aspx page. i am using master page, now trying to add this into default.aspx Any help will be appreciated. I am currently losing some hair.
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Mar 8, 2008
I keep getting this error whenever I try to run my query: System.Data.SqlClient.SqlException: Incorrect syntax near '>'.
I'm just trying to fill a dataset with three tables that contain the past few days headlines...what am I doing wrong?? Private Sub fishHeadlines()
Dim dateNow As DateTime = DateTime.Now()Dim dateThen As DateTime = DateTime.Today.AddDays(-2)
'create the table array so we can create the sql statement in a moment
Dim table() As Stringtable = New String() {"Snapper", "Scissor", "MahiMahi"}
Dim strSelect As String
'Create a dataset to hold the tables containing the headlinesDim headlinesDS As New DataSet()
'create the connection string - SnapshotConnectionString is in web.config file
Dim strConnect As StringstrConnect = ConfigurationManager.ConnectionStrings("fishConnectionString").ConnectionString
'create a connection object to the databaseDim objConnect As New SqlConnection(strConnect)
objConnect.Open()
Dim i As Integer
'fill the datatablesFor i = 0 To table.Length
strSelect = "SELECT Event FROM " & table(i) & "WHERE (DateOfEntry > '" & dateThen & "')"
'create a data adapter object using connection and sql statementsDim objDA1 As New SqlDataAdapter(strSelect, objConnect)
'fill the dataset
objDA1.Fill(headlinesDS, table(i))
Next
Dim strTable As StringDim dr As DataRow
strTable = "<table>"For i = 0 To table.Length
For Each dr In headlinesDS.Tables(table(i)).Rows
strTable += "<tr><td>" & dr(0).ToString() & "</td></tr>"
Next
Next
strTable += "</table>"
'display the data
lblHeadlines.Text = strTable
End Sub
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Apr 6, 2008
Hello,
I see the following in connection strings all the time: providerName="System.Data.SqlClient"/>
For example:<connectionStrings><add name="classifiedsConnection" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|classifiedsdb.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient"/></connectionStrings>
What is providerName="System.Data.SqlClient" ? What is it used for?Thanks, Jim
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May 1, 2008
Hi there, i copied some insert code from one page to another and it keeps throwing me this error, i was wondering if anyone can help me out. Here is the error
System.Data.SqlClient.SqlException: The name "Credit" is not permitted in this context. Valid expressions are constants, constant expressions, and (in some contexts) variables. Column names are not permitted. at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async) at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) at System.Data.SqlClient.SqlCommand.ExecuteNonQuery() at Admin_expenses.Button1_Click(Object sender, EventArgs e) in d:hostingmemberashdfhtdocswwwAdminexpenses.aspx.cs:line 40
This is my code, i cant see anything obvious and as i said i just copied it across, the only things changed were the names and the sqlstringprotected void Button1_Click(object sender, EventArgs e)
{decimal intamount = Convert.ToDecimal(txtAmount.Text);
string sConnectionStringExpense = "Data Source=xxxx;Initial Catalog=xxxx;User ID=xxxx;Password=xxxx";SqlConnection objConnExpense = new SqlConnection(sConnectionStringExpense);
using (objConnExpense)
{
objConnExpense.Open();string sqlExpense = "INSERT INTO tbl_expenses (expense_amount, expense_payment_type, expense_type, expense_description) " +
"VALUES (" + intamount + "," + ddlPaymentType.SelectedItem + "," + ddlExpenseType.SelectedValue + "," + txtDescription.Text + ")";SqlCommand objCmdExpense = new SqlCommand(sqlExpense, objConnExpense);
try
{
objCmdExpense.ExecuteNonQuery();
}catch (Exception ex)
{lblcomplete.Text = "!!Adjust stock for product at location " + Convert.ToString(ex);
}
finally
{
objConnExpense.Close();
}
}
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May 31, 2008
Yesterday, in response to an error msg (something like Login failed for user ''), I deleted the 'providerName=System.Data.SqlClient'in my connectionStrings from Web.config. Then the aspx website worked.I understand that the value "System.Data.SqlClient" specifies that ASP.NET should
use the ADO.NET provider System.Data.SqlClient
when making a connection. Why deleting providerName solved the error? Jeffrey
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Mar 9, 2004
Hi everybody,
We are developing Asp.Net Application in following environment.
Windows 2003
Dot Net 2003
SQL Server 2000
Problem :
We have team of four people. We made one machine as database server and rest of the people trying to connect to that database server. we are getting error "SQL server not found.".
We are using following string as a connection string.
"DATA SOURCE=192.292.7.105;DATABASE=xxx;User ID=xxx;password=xxxx"
We have tried same connection string with the VB.Net program. It is working fine.
But when we are trying same string in the web application. It is giving me the above mentioned error.
Can any one help me ?
Thanks is advance.
From
Jigar Shah
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Sep 2, 2005
I am getting the exception -System.Data.SqlClient.SqlException: Timeout expired.The timeout period elapsed prior to completion of the operation or the server is not respondingWhen I am executing the stored procedureHow to resolve this?
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Apr 16, 2006
I am getting the error below
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Dec 3, 2007
We have some big problems with our SQL Server 2000 database right now.
The code has not been changed for over halv an year and some days ago we started to get this error.
System.Data.SqlClient.SqlException: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
Both web and database server is running fine.
Any help is appreciated!
(We are now pretty sure that all errors occurs when we are doing inserts to the database.)
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Jul 21, 2007
Hi there,
I am not sure it is the right forum. The Exception is thrown in C# app while saving a few databases. Small databases are being saved OK but this one has 12,934,142KB after the last backup. I am not even sure what the words "last backup" mean in this case. It is possible that is the size of the database from two months ago when first the problem appeared. Since then I've neglected backup being preoccupied with other problems although the database grew.
The backup is executed by this store procedure:
USE [hist_OHLC]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER OFF
GO
ALTER PROCEDURE [dbo].[backUphist_OHLC]
AS
BEGIN
SET NOCOUNT ON;
ALTER DATABASE hist_OHLC SET RECOVERY FULL
BACKUP DATABASE hist_OHLC TO DISK = 'L:SQLServerBackupshist_OHLChist_OHLCFullRM.bak'
BACKUP LOG hist_OHLC TO DISK = 'L:SQLServerBackupshist_OHLChist_OHLCFullRM.log';
END
What can I do about it? What is the rational way of backing up databases of this size?
What is the rational way of maintaining databases of this size in SQLEXPRESS? Shall I perhaps break this database down into fragments?
The tables contain daily records, about 500 per day. I can conceivably create another database every month or so but it will be a hassle.
How can I increase the timeout?
I just repeated the backup. All databases have been saved except this last one--Imoved that backup operation down the chain to be the last one. One database with about 1.5GBytes was saved fine.
I checked the timeout it is 15 sec. One has not control over it in C#. It does not have a Set option.
15
MyHandler caught : Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.
The backup or restore was aborted.
Thanks.
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May 15, 2007
Hello,
we have asp.net apps on a windows 2003 server that connect to an instance of sql server 2005 enterprise edition on another windows 2003 server. We get this error at random times. Anyone know what could be causing it?
System.Web.HttpUnhandledException: Exception of type System.Web.HttpUnhandledException was thrown. ---> System.Data.SqlClient.SqlException: SSL Security error.
at System.Data.SqlClient.ConnectionPool.GetConnection(Boolean& isInTransaction)
at System.Data.SqlClient.SqlConnectionPoolManager.GetPooledConnection(SqlConnectionString options, Boolean& isInTransaction)
at System.Data.SqlClient.SqlConnection.Open()
Thanks
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