Bulk Update Of All Changes From DataView To DataSet (only Opening Connection Once)?
Feb 15, 2008
(Hope this isn't a "stupid" question, but I haven't been able to find a straight-forward answer anywhere)"
I currently have code that iterates through a dataview's records, making a change to a field in some of the records. The way I have this coded, a conection has to opened & closed for each individual record that's updated:
dsrcUserIae.UpdateCommand = "UPDATE UserIAE SET blnCorrect = @blnCorrect WHERE (ID = @ID)"
dsrcUserIae.UpdateParameters.Add("blnCorrect", SqlDbType.Bit)
dsrcUserIae.UpdateParameters.Add("ID", SqlDbType.Int)
Dim myDataView As DataView = CType(dsrcUserIae.Select(DataSourceSelectArguments.Empty), DataView)
For Each myRow As DataRowView In myDataView
If myRow("FkUsersAnswerID") = myRow("AnswerID") Then
intCorrect = 1
Else
intCorrect = 0
End If
dsrcUserIae.UpdateParameters.Item("blnCorrect").DefaultValue = intCorrect
dsrcUserIae.UpdateParameters.Item("ID").DefaultValue = myRow("ID")
intUpdateResult = dsrcUserIae.Update()
Next
It seems like I should be able to do something like this (call update once), but I'm not sure how...
dsrcUserIae.UpdateCommand = "UPDATE UserIAE SET blnCorrect = @blnCorrect WHERE (ID = @ID)"
dsrcUserIae.UpdateParameters.Add("blnCorrect", SqlDbType.Bit)
dsrcUserIae.UpdateParameters.Add("ID", SqlDbType.Int)
Dim myDataView As DataView = CType(dsrcUserIae.Select(DataSourceSelectArguments.Empty), DataView)
For Each myRow As DataRowView In myDataView
If myRow("FkUsersAnswerID") = myRow("AnswerID") Then
myRow("blnCorrect") = 1
Else
myRow("blnCorrect") = False
End If
Next
intUpdateResult = dsrcUserIae.Update() 'Want all changed myRow("blnCorrect") to be updated to datasource
Can anybody explain how to do the bulk update? I've seen some info about AcceptChanges and Merge, but I'm not sure if they apply here, or if they more for Transactions.
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Dec 23, 2006
Question related to Visual Basic Video Lesson 09 (Databinding.wmv) by Bob Tabor.
Made a table and a UI form according to this lesson (table colums: CustomerID, FirstName, LastName).
Is it possible to use the same or an identical looking query form to find "Bob" by typing Bob in the Fist Name textbox or "Tabor" by typing Tabor in the Last Name textbox as in FileMaker?
Thanks,
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Sep 27, 2007
I have to update a field within a table of 60 records or so. Each record has a different field value. it's type varchar. i was given an excel file with the field values and was thinking of a bulk update like bulk insert, but i don't recall that it's possible that way.
Is the only way to create a table, bulk insert, then merge the two tables together with UPDATE?
Just wanted to see if there was an easier way to do it, otherwise i'll take the latter route. Thanks!
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Jul 14, 2006
Hi
I access a DB by as abvious creating a DB Connection and then sending a querry to it. Finally creating an SQL Command and then exuting it.
But the thng is I am using a static function:
which opens a new connection and returns a data reader based on the querry. i.e
pubblic static SqlConnection OpenConnection()
{
try
{
string connectionString = "Data Source=mm\SQLEXPRESS;Initial Catalog=monsoonDB;Integrated Security=True";
SqlConnection conn = new SqlConnection(connectionString);
conn.Open();
return conn;
}
catch (Exception ex)
{
throw;
}
}
Now I have the execute selectquerry function.....
public static SqlDataReader ExecuteSelectQuerry(string querry)
{
try
{
SqlConnection conn = OpenConnection();
SqlCommand scomm = new SqlCommand(querry, conn);
SqlDataReader sdr = scomm.ExecuteReader();
return sdr;
}
catch (Exception e)
{
return null;
}
}}
now my question is....the instance of conn is limited only to that function only, and not returned outside. Whereas only the SqlDataReader is returned outside. Does that have any abnormal affect on the application. Since my ASP Application is getting locked (not doing anything, nt even post back!) sometimes after a few DB operation.
Arent these connections and instances Managed (auto garabage collection)?? Can memory leaks under such a situation occur.
Please help
Thanks
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Jun 26, 2007
I have created my query to do what it needs to do but i'm getting error when i click the button, it says there is an error opening my connectiong....
I.E.
Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
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: Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.Source Error:
Line 28:
Line 29: //open the connection
Line 30: myConnection.Open();
Line 31:
Line 32: //create a commandSource File: c:Documents and SettingsplanPlanDatabaseBZAvuAdd.aspx.cs Line: 30 Stack Trace:
[SqlException (0x80131904): Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.]
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +171
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +199
System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +2305
System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK) +34
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +606
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +193
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +502
System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +28
System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +429
System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +70
System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +512
System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +85
System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +89
System.Data.SqlClient.SqlConnection.Open() +160
_Default.insertIntoVU() in c:Documents and SettingsplanPlanDatabaseBZAvuAdd.aspx.cs:30
_Default.addAppButton_Click(Object sender, EventArgs e) in c:Documents and SettingsplanPlanDatabaseBZAvuAdd.aspx.cs:127
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +75
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +98
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) +4919
therefor is this saying that I have to login before even testing this thing or what??
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Mar 16, 2008
Hi most of my code follows the following format in a lot of my pages, my question is; Am i approaching it the right way in terms of performance, sql injection attacks and anything someone more knowledgeable than myself can think off, please feel free to criticise the code. Thank youprotected void Page_Load(object sender, EventArgs e)
{string strID = Request.QueryString["id"];
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["streamConnectionString"].ConnectionString);SqlCommand command = new SqlCommand("stream_EventsByID", conn);
command.CommandType = CommandType.StoredProcedure;command.Parameters.Add("@eventID", SqlDbType.Int).Value = Request.QueryString["id"];
conn.Open();
SqlDataReader reader = command.ExecuteReader(CommandBehavior.CloseConnection);
eventList.DataSource = reader;
eventList.DataBind();
conn.Close();
}
}
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Apr 3, 2006
hi,
I have developed an application in c#.net 2.0 for Pocket PC. And even i developed a webservice to communicate between sql server 2005 and sql mobile 2005. Webservice returns the data in a dataset format from sql server 2005, but while inserting the data row by row from dataset, it is taking a huge amount of time. I would like to know, is there any way where i can copy the bulk data from dataset into the sql mobile 2005 using c#.And how this can be achieved.
Thank you
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Apr 4, 2006
I'm developing an intranet site in ASP.NET 2.0 but I can't seem to connect to the DB from within my code. I've created a .vb class that houses a private Connection() that other functions within the class can call to connect to the database. In the calling function, I've declared my connection object and called the "Open" method on the object. However, when I attempt to execute the stored procedure command by calling the "ExecuteScalar" method, I get the following error:
"ExecuteScalar requires an open and available Connection. The connection's current state is closed."
Here's the code from my class:
Imports System.Data
Imports System.Data.SqlClient
Namespace Encompass
Public Class EncompassSecurity
Public Shared Function GetHRIDByNTUserID(ByVal strNTUserID) As String
Dim strHRID As String
'Create command object
Dim cmd As New SqlCommand("usp_Get_HRID_By_NTUserID", Connection())
cmd.CommandType = CommandType.StoredProcedure
'Open DB connection
Dim DBConnection As SqlConnection = Connection()
DBConnection.Open()
'Input parameters
Dim inNTUserParam As New SqlParameter("@NT_UserID", SqlDbType.VarChar)
inNTUserParam.Direction = ParameterDirection.Input
inNTUserParam.Value = strNTUserID
cmd.Parameters.Add(inNTUserParam)
'Output parameters
Dim outHRIDParam As New SqlParameter("@HRID", SqlDbType.Int)
outHRIDParam.Direction = ParameterDirection.Output
cmd.Parameters.Add(outHRIDParam)
'Run stored procedure
strHRID = cmd.ExecuteScalar()
Return (strHRID)
'Close DB connection
DBConnection.Close()
End Function
Private Shared Function Connection() As SqlConnection
Dim strConnectionString As String
strConnectionString = ConfigurationManager.ConnectionStrings("Conn").ConnectionString
Return New SqlConnection(strConnectionString)
End Function
End Class
End Namespace
Here's the code from my web.config file:
<?xml version="1.0"?>
<!--
Note: As an alternative to hand editing this file you can use the
web admin tool to configure settings for your application. Use
the Website->Asp.Net Configuration option in Visual Studio.
A full list of settings and comments can be found in
machine.config.comments usually located in
WindowsMicrosoft.NetFrameworkv2.xConfig
-->
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
<connectionStrings>
<add name="Conn" connectionString="Data Source=ServerName;Initial Catalog=NPASDV;uid=UserName;password=*******;"
providerName="System.Data.SqlClient" />
</connectionStrings>
<system.web>
<!--
Set compilation debug="true" to insert debugging
symbols into the compiled page. Because this
affects performance, set this value to true only
during development.
Visual Basic options:
Set strict="true" to disallow all data type conversions
where data loss can occur.
Set explicit="true" to force declaration of all variables.
-->
<roleManager defaultProvider="AspNetWindowsTokenRoleProvider" />
<compilation debug="true" strict="false" explicit="true" />
<pages>
<namespaces>
<clear />
<add namespace="System" />
<add namespace="System.Collections" />
<add namespace="System.Collections.Specialized" />
<add namespace="System.Configuration" />
<add namespace="System.Text" />
<add namespace="System.Text.RegularExpressions" />
<add namespace="System.Web" />
<add namespace="System.Web.Caching" />
<add namespace="System.Web.SessionState" />
<add namespace="System.Web.Security" />
<add namespace="System.Web.Profile" />
<add namespace="System.Web.UI" />
<add namespace="System.Web.UI.WebControls" />
<add namespace="System.Web.UI.WebControls.WebParts" />
<add namespace="System.Web.UI.HtmlControls" />
</namespaces>
</pages>
<!--
The <authentication> section enables configuration
of the security authentication mode used by
ASP.NET to identify an incoming user.
-->
<authentication mode="Windows" />
<!--
The <customErrors> section enables configuration
of what to do if/when an unhandled error occurs
during the execution of a request. Specifically,
it enables developers to configure html error pages
to be displayed in place of a error stack trace.
<customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
<error statusCode="403" redirect="NoAccess.htm" />
<error statusCode="404" redirect="FileNotFound.htm" />
</customErrors>
-->
</system.web>
</configuration>
What am I doing wrong? Any help would be most appreciated!!
Manuel
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Jan 2, 2005
Hello, Im new with databases.
I know that opening a connection to a DB is expensive. Usually I write a method that opens a connection to the DB then I execute a query and then close the connection. Pretty standard.
OK, so how do I handle opening connections to the database when I need to run multiple queries. For example, i have a webpage that need to query the database to see if the user has moderator privledges, then depending on that query I have to query the DB again for moderator specific information or non-modertaor information.
So in this case how do i handle opening connections to the DB. Is it ok to generally have to open a connection to a DB multiple times on a page load?
The obvious solution is to keep the connection open. That is, open a connection, query the Db, keep the connection open, do the conditional statment ( if is_Moderator) then query the DB again for the info that I need, and then close the connection. But, from all the books that Ive been reading this is not a good practice because business logic should not been in the dataAccess layer.
Any help would be much appreciated.
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Dec 31, 2007
When the databse file's "copy to output" property is set to "copy always" my data is not saved and when I
change it to "do not copy" it gives me the error "cannot attach the database file", and does not open my connection.
I dont know what to do.....
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Oct 31, 2006
i have a loop that can run say 30k times. in there i am using the try / catch / finally blocks to handle ADO.NET Transactions (thanks CADDRE!)Should i open and close the SQL Connection for each record? or open it and close it outside of the loop only once ?thanks in advance, mcm
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Oct 29, 2004
Well here is my connection string, I used these details to succesfully access the server from mySQL gui.
SqlConnection shhfd = new SqlConnection ("Data Source=http://www.mydomain.co.uk; " +
"user id=mteccles; password=mypass; connection timeout=30; "
then... try { shhfd.Open(); blah blah blah.
The exception caught is as follows.
at System.Data.SqlClient.ConnectionPool.GetConnection(Boolean& isInTransaction) at System.Data.SqlClient.SqlConnectionPoolManager.GetPooledConnection(SqlConnectionString options, Boolean& isInTransaction) at System.Data.SqlClient.SqlConnection.Open() at WebService1.Service1.HelloWorld() in g:inetpubwwwrootwebservice1service1.asmx.cs:line 120
My guess is that something in the web.config isn't right or maybe the host (webfusion) is strange. Thanks if anyone can help.
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Apr 26, 2008
Hi,
I have a application running on Biztalk server , VS 2008 and SQL server 2008.
I have opened a SQL connection string and referring some DB which works absoluetly fine.
But in my code in C#, i try to open another connection with some different database, as i apply the connection.open(), it gives me a very strange error of Sql server 2005. And i dont have Sql 2005 on my box.
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (Microsoft SQL Server, Error: 53)
Can you please help me out??
Thanks.
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Feb 15, 2007
I am getting the error message below when trying to connect to SQL Server 2000. Here are the details:
Problem is occuring with a new website trying to connect to SQL Server. The error occurs right at the open statement.
Using SQL Server 2000
Web server is on a different machine than SQL Server
I have many websites connecting to this SQL Server. Websites are all on the same webserver.
I can connect to this SQL Server using the Query Analyzer using the same ID and PW as in my connection string
My web application runs OK using this SQL Server when I run it from my laptop - just changed the connection string Initial Catalog parameter.
Any help would be appreciated.
Jay
---
Error Message
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
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Apr 15, 2008
Hi,
I'm writing an application with Visual Studio 2005 (Visual Basic .NET 2.0) which uses a SQL Compact Edition 3.5 database. On my HTC Touch with Windows Mobile 6.1 installed the application crashes, without any error message, if I try to open a connection. But...On the Windows Mobile 6 Pro emulator the connection opens normaly. The whole application runs perfect.
On both "devices" are the same dll's, of version 3.5.0.0.
I'm using the following code to open the connection:
Code Snippet
Private mySQLce_strConnection As String = "Data Source ='" & App_Path() & "MControl_SQLce.sdf" & "';"
Dim localConnection As New SqlCeConnection(mySQLce_strConnection)
localConnection.Open()
I tried so many things but without any success. But...I'm able to open the database (MControl_SQLce.sdf) with the Query Analyzer 3.5 on the Mobile. No problem.
This is my configuration:
Dev PC:
Windows XP SP2
Visual Studio 2005 Pro
.NET Framework 2.0 SP1
.NET Compact Framework 2.0
SQL Server Compact Edition 3.5 (this version I reference to in my VS project)
Mobile Device (HTC Touch):
Windows Mobile 6.1
SQL Server Compact Edition 3.5
Any suggestions? I can't figure this out.
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Jan 4, 2006
I came across something strange today. I was wondering I was doing something wrong.
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Jan 16, 2005
Hello everyone. I'm very new to asp.net. I've been coding in vb.net for a while now (getting my associates degree in desktop application programming) and my boss wants all of my new applications to be web based now. Well, i decided to take some initiative on this and begin a new project for my department. This is a very small project. So far, everything is coming along alright (i found an eBook that's helped me quite a bit). Everything was cool until yesterday when i tried to connect to our sql server database. I get an error message stating:
Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
Because i'm testing this on my system as well as the remote system which hosts the application, i can see the error message on the remote system. Here is the error it's giving me:
Server Error in '/' Application.
--------------------------------------------------------------------------------
Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
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: Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.
Source Error:
Line 57: sConnString = "Server=F11602A2120564OPS;Initial Catalog=OpsMonitor;User ID='public';Password=;Integrated Security=SSPI;"'Connection String
Line 58: sConn = New SqlConnection(sConnString)'Initialize New Connection
Line 59: sConn.Open'Open the connection
Line 60: End Sub
Line 61: </script>
Source File: c:inetpubwwwrootatm_reporting.aspx Line: 59
Stack Trace:
[SqlException: Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection.]
System.Data.SqlClient.ConnectionPool.GetConnection(Boolean& isInTransaction) +474
System.Data.SqlClient.SqlConnectionPoolManager.GetPooledConnection(SqlConnectionString options, Boolean& isInTransaction) +372
System.Data.SqlClient.SqlConnection.Open() +383
ASP.atm_reporting_aspx.OpenConn() in c:inetpubwwwrootatm_reporting.aspx:59
ASP.atm_reporting_aspx.Page_Load(Object Src, EventArgs E) in c:inetpubwwwrootatm_reporting.aspx:23
System.Web.UI.Control.OnLoad(EventArgs e) +67
System.Web.UI.Control.LoadRecursive() +35
System.Web.UI.Page.ProcessRequestMain() +731
You can see my SQL Connection string in there as well. Can someone please help me with this? I can post the code to the entire page as well if that would help. I'm developing this with Dreamweaver MX 2004 (i like dreamweaver MUCH better than visual studio, especially for web design/development). Thanks,
Eric
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Oct 15, 2007
I am getting an error in Replication between SQL Server 2005 and SQL Express when "Connecting to Subscriber". Detailed error message is given below. Do we need to increase the logintimeout for "Connecting to Subscriber". How can we increase it?
Message
2007-10-15 06:37:58.398 Startup Delay: 8503 (msecs)
2007-10-15 06:38:06.898 Connecting to Distributor 'ACR-MANGO'
2007-10-15 06:38:06.976 Initializing
2007-10-15 06:38:06.976 Parameter values obtained from agent profile:
-bcpbatchsize 2147473647
-commitbatchsize 100
-commitbatchthreshold 1000
-historyverboselevel 1
-keepalivemessageinterval 300
-logintimeout 15
-maxbcpthreads 1
-maxdeliveredtransactions 0
-pollinginterval 5000
-querytimeout 1800
-skiperrors
-transactionsperhistory 100
2007-10-15 06:38:06.991 Connecting to Subscriber 'ACR-ANJILISQLEXPRESS'
2007-10-15 06:38:46.133 Agent message code 20084. The process could not connect to Subscriber 'ACR-ANJILISQLEXPRESS'.
2007-10-15 06:38:46.148 Category:NULL
Source: Microsoft SQL Native Client
Number: 08001
Message: Unable to complete login process due to delay in opening server connection
2007-10-15 06:38:46.148 The agent failed with a 'Retry' status. Try to run the agent at a later time.
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Feb 26, 2007
Hi, I am trying to figure out how to update a dataset. Below is my sample code but it gives me this error on the mySqlDataAdapter.Update line.Dynamic SQL generation for the UpdateCommand is not supported against a SelectCommand that does not return any key column information. I looked around and it seems like I'm supposed to add a Primary Key but I did that and still get nothing. Below is my page load code... it is based on the quickstart at http://quickstarts.asp.net/QuickStartv20/howto/doc/adoplus/UpdateDataFromDB.aspx but I'm still having trouble and not sure what I'm missing. 1 // Create a new Connection and SqlDataAdapter
2 SqlConnection myConnection = new SqlConnection("Server=localhost;uid=user;pwd=password;database=northwind");
3 SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter("Select * from Customers", myConnection);
4 DataSet myDataSet = new DataSet();
5 DataRow myDataRow;
6
7 // Create command builder. This line automatically generates the update commands
8 // for you, so you don't have to provide or create your own.
9 SqlCommandBuilder mySqlCommandBuilder = new SqlCommandBuilder(mySqlDataAdapter);
10
11 // Set the MissingSchemaAction property to AddWithKey because Fill will not cause
12 // primary key & unique key information to be retrieved unless AddWithKey is specified.
13 mySqlDataAdapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;
14 mySqlDataAdapter.Fill(myDataSet, "Customers");
15
16 showData(myDataSet);
17
18 // Set PK of table to CustomerID ??
19 DataColumn[] pk = new DataColumn[1];
20 pk[0] = myDataSet.Tables["Customers"].Columns["CustomerID"];
21 myDataSet.Tables["Customers"].PrimaryKey = pk;
22
23 // Edit some data
24 myDataSet.Tables["Customers"].Rows[0]["ContactName"] = "Maria Anders2";
25 //DataRow myDataRow1 = myDataSet.Tables["Customers"].Rows.Find("ALFKI");
26 //myDataRow1["ContactName"] = "Maria Anders2";
27
28 showData(myDataSet);
29
30 //Update DB
31 mySqlDataAdapter.Update(myDataSet, "Customers");
32 Thanks!
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Jul 23, 2005
I know this is very very silly.But I am stuck and don't know what to do.I have a simple form which has 1 textbox and a 'Save' button.I have created a Database connection and an Adapter with Dataset withthe help of Wizards.I have binded by text box control to one of the database field.When the form gets loaded it displays the field information correctly."Me.SqlDataAdapter1.Fill(DsBasicData1)"However, when I press the save button it does not update the databasebehind it.I have given the following code to the click event of save button."Me.SqlDataAdapter1.Update(DsBasicData1)"Strangely I don't know why the code does not work.
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Apr 25, 2008
I have an unusual question... I have a table that I have to select the top 300 records from, check the date on each record, and using an if... then... statement, loop through each record updating a field based on criteria.
The problem is that it takes so long to do this. Is there a way to populate an object and pass that object with the data to a SQL stored procedure to have the SQL server do all the updating as opposed to the application doing the record updating? Does that make sense? Here's a sample of the code and you'll see what I'm talking about.
Thanks in advance for any help or advice you can give.
Imports Microsoft.SqlServer.Server
Imports System.Data.SqlClient
Imports CallTracker_AgingCheck
Module CallTracker
Sub Main()
GetWebAgingData()
GetWebCallsData()
End Sub
#Region "Get Data"
Public agingStatusNumber As New ArrayList
Public agingEscalationNumber As New ArrayList
Public callStatusNumber As New ArrayList
Public CallStatus As New ArrayList
Public Sub GetWebCallsData()
Dim dt As New DataTable
Dim Criteria As String = "SELECT TOP 300 CallID, TIMEOFCALL, Status, StatusNumber " & _
"FROM WebCalls " & _
"WHERE (Status = 'OPEN') OR " & _
"(Status = 'IN PROCESS') OR " & _
"(Status = 'WORKORDER') OR " & _
"(Status = 'PRIORITY') OR " & _
"(Status = 'PENDING') " '& _
'"ORDER BY TimeOfCall DESC"
Dim Fa As String = String.Empty
Dim fromDATE As String = String.Empty
Dim toDate As String = String.Empty
Dim ds As New DataSet()
Dim tbl As String = "WebCalls"
Dim x1 As Integer = 0
Try
Using cn As New SqlClient.SqlConnection(Database.SQLConnection)
cn.Open()
Using cm As SqlClient.SqlCommand = cn.CreateCommand()
cm.CommandText = Criteria
cm.CommandType = CommandType.Text
cm.Parameters.AddWithValue("@CALLID", Fa)
cm.Parameters.AddWithValue("@TIMEOFCALL ", Fa)
cm.Parameters.AddWithValue("@STATUS", Fa)
cm.Parameters.AddWithValue("@STATUSNUMBER", Fa)
Dim Age As TimeSpan = Nothing
Dim _totalHours As Integer = Nothing
Dim EscalateTime As Integer = agingEscalationNumber.Count
Dim DAUpdateCmd As SqlCommand
Using da As New SqlDataAdapter(Criteria, cn)
da.Fill(dt)
Dim callID As Integer = Nothing
Dim statNO As Integer = Nothing
Dim toc As Integer = dt.Rows.Count
Dim x As Integer = 0
For x = 0 To toc - 1
Dim y As Date = dt.Rows(x).Item(1) 'gets the date from the first row in WebCalls for comparison with WebAging
Age = Today.Subtract(y)
_totalHours = Age.TotalHours
If _totalHours > 744 Then
Console.WriteLine("This record is older than 30 days")
Else
callID = dt.Rows(x).Item(0)
DAUpdateCmd = New SqlCommand("Update WebCalls SET STATUSNUMBER = @STATUSNUMBER where CALLID = @CALLID", da.SelectCommand.Connection)
DAUpdateCmd.Parameters.Add(New SqlParameter("@STATUSNUMBER", SqlDbType.Int))
DAUpdateCmd.Parameters("@STATUSNUMBER").SourceVersion = DataRowVersion.Current
DAUpdateCmd.Parameters("@STATUSNUMBER").SourceColumn = "STATUSNUMBER"
DAUpdateCmd.Parameters.Add(New SqlParameter("@CALLID", SqlDbType.Int))
DAUpdateCmd.Parameters("@CALLID").SourceVersion = DataRowVersion.Original
DAUpdateCmd.Parameters("@CALLID").SourceColumn = "CALLID"
da.UpdateCommand = DAUpdateCmd
da.Fill(ds, tbl)
Dim z As Integer = 0
Dim _stat0 As Integer = agingEscalationNumber(0)
Dim _stat1 As Integer = agingEscalationNumber(1)
Dim _stat2 As Integer = agingEscalationNumber(2)
Dim _stat3 As Integer = agingEscalationNumber(3)
Dim StatusNo_0 As Integer = agingStatusNumber(0)
Dim StatusNo_1 As Integer = agingStatusNumber(1)
Dim StatusNo_2 As Integer = agingStatusNumber(2)
Dim StatusNo_3 As Integer = agingStatusNumber(3)
If _totalHours <= _stat0 Then
Try
ds.Tables(tbl).Rows(3)("STATUSNUMBER") = StatusNo_0
da.Update(ds, tbl)
Console.WriteLine("Status Number: " & Str(StatusNo_0) & " callID = " & callID)
Catch ex As Exception
Console.WriteLine(ex)
End Try
End If
If _totalHours >= (_stat0 + 1) And _totalHours <= _stat1 Then
Try
ds.Tables(tbl).Rows(3)("STATUSNUMBER") = StatusNo_1
da.Update(ds, tbl)
Console.WriteLine("Status Number: " & Str(StatusNo_1) & " callID = " & callID)
Catch ex As Exception
Console.WriteLine(ex)
End Try
End If
If _totalHours >= (_stat1 + 1) And _totalHours <= _stat2 Then
Try
ds.Tables(tbl).Rows(3)("STATUSNUMBER") = StatusNo_2
da.Update(ds, tbl)
Console.WriteLine("Status Number: " & Str(StatusNo_2) & " callID = " & callID)
Catch ex As Exception
Console.WriteLine(ex)
End Try
End If
If _totalHours >= (_stat2 + 1) And _totalHours <= _stat3 Then
Try
ds.Tables(tbl).Rows(3)("STATUSNUMBER") = StatusNo_3
da.Update(ds, tbl)
Console.WriteLine("Status Number: " & Str(StatusNo_3) & " callID = " & callID)
Catch ex As Exception
Console.WriteLine(ex)
End Try
Else
End If
End If
Next
End Using
End Using
End Using
Catch ex As Exception
Console.WriteLine(ex)
End Try
End Sub
Public Sub GetWebAgingData()
Dim dt As New DataTable
Dim Fa As String = String.Empty
Dim fromDATE As String = String.Empty
Dim toDate As String = String.Empty
Dim Criteria As String = "Select RecordID, StatusNumber, EscalationTime from WebAging" 'create a selection statement"
'don't forget the email addys for sending based on escalation rates.
Dim x1 As Integer = 0
Try
Using cn As New SqlClient.SqlConnection(Database.SQLConnection)
cn.Open()
Using cm As SqlClient.SqlCommand = cn.CreateCommand()
cm.CommandText = Criteria
cm.CommandType = CommandType.Text
cm.Parameters.AddWithValue("@RecordID", Fa)
cm.Parameters.AddWithValue("@StatusNumber ", Fa)
cm.Parameters.AddWithValue("@EscalationTime", Fa)
Using da As New SqlClient.SqlDataAdapter(cm)
da.Fill(dt)
Dim dtCnt As Integer = dt.Rows.Count
Dim x As Integer = Nothing
Dim escalateTime As Integer = Nothing
Dim _StatusNumber As Integer = Nothing
For x = 0 To dtCnt - 1
escalateTime = dt.Rows(x).Item(2)
_StatusNumber = dt.Rows(x).Item(1)
agingEscalationNumber.Add(escalateTime)
agingStatusNumber.Add(_StatusNumber)
Next x
End Using
End Using
End Using
Catch ex As Exception
Console.WriteLine(ex)
End Try
End Sub
#End Region
#Region "Get Status Information From WebCalls"
#End Region
End Module
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Oct 26, 2007
I have a gridview and a dataset. When I start my application I see the results in my gridview. When I clic on edit and chanche some value and click on update it wil give me this error:ObjectDataSource 'ObjectDataSourcePersoon' could not find a non-generic method 'Update' that has parameters: naam, tussenvoegsel, achternaam, adres, woonplaats, telefoonnummer, original_id, Original_naam, Original_tussenvoegsel, Original_achternaam, Original_adres, Original_woonplaats, Original_telefoonnummer. Does someone know whats the problem??
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Dec 31, 2007
I am using Visual Studio's Report creator and I'm trying to use a custom built assembly that has business logic in it. I would like to evoke one of it's methods. One of the parameters for the constructor of MyClass is a connection string. Is there any way to access one of the report's DataSet's connection string so I can pass it on to other functions in my custom assembly? Thank you for your help.
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Feb 5, 2008
I am currently wrapping up a website upgrade for a client and I am working on a development server/database. The development server/database will become the live version. When the upgrade goes live, I will need to update that database with the latest data from specific datatables (no all of them) in the previously live database, but I don't know how to do a bulk refresh of datatables.
Problem: specific datatables (not all datatables) from Database1 need to be updated with the data from Database2. Database1 and Database2 are copies of each other with vast differences in some of the data.
Result: All of the current, up-to-date data needs to reside on Database1.
Solution: Any ideas?
I am using MSSQL 2000 and the databases reside on the same server.
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Mar 8, 2006
We are planning to add a new attribute to one of our tables to speed updata access. Once the attribute is added, we will need to populatethat attribute for each of the records in the table.Since the table in question is very large, the update statement istaking a considerable amount of time. From reading through old postsand Books Online, it looks like one of the big things slowing down theupdate is writing to the transaction log.I have found mention to "truncate log on checkpoint" and using "SETROWCOUNT" to limit the number of rows updated at once. Or "dumptransaction databaseName with No_Log".Does anyone have any opinions on these tactics? Please let me know ifyou want more information about the situation in order to provide ananswer!
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Jul 1, 2004
I have dataadapter and dataset that reads/writes to SQL tables.
I can read. I can create "new" records.
However, I have not been able to master the "updating" of an existing row.
Can someone provide me specific code for doing this please or tell me what I doing wrong in the code below.
The code I using is below. I don't get error, but changes do not get written to SQL dbase.
For starters, I think I "not" supposed to use the 2nd line(....NewRow). I think this is only for new row, not updating of existing row - but I don't know any other way to get schema of row.
thanks to any who can help
Dim drow As DataRow
drow = Me.dsRequests1.Tables("REQUESTS").NewRow
drow.BeginEdit()
drow.Item("Request_Name") = Me.txtRequestName.Text
drow.Item("Request_Comments_Txt") = Me.txtRequestComments.Text
drow.Item("Requestor_Contact_Id") = Me.txtRequestor.Text
drow.Item("Request_BigX_Status_Type_Cd") = Me.ddlBigXStatus
drow.Item("Request_Action_Type_Cd") = Me.ddlRequestActionRequested.SelectedItem.Text
drow.EndEdit()
Me.DaREQUESTS.Update(Me.dsRequests1.Tables("REQUESTS"))
Me.dsRequests1.AcceptChanges()
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Feb 6, 2007
Do I have to use condition split?, then union all?
if in script, I can use update from <tablename> Set column = isnull(column, 'NA'). It's so simple.
I'm also wondering can we run SQL Script against input dataset in a SSIS component?
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Feb 5, 2007
I'm bothered by an issue of updating a column in input dataset from a update query. It looks like SSIS has a very poor function on this.
Example, I have an input dataset of name, salary, dept_no, and I have another table called departments which has fields of dept_no, Dept_name, basic_salary
now I want to update salary column in input dataset with basic_salary if it's salary is smaller than the basic_salary.
update #tmp set salary = basic_salary where #tmp.salary <departments.basic_salary and #tmp.dept_no = departments.dept_no
how could I impletement this in SSIS package?
I tried with lookup, modify scripts by enabling memory restriction. It doesn't say any error when I save the package, but I never get pass debug.
HELP!!
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May 23, 2007
Here is my problem: I've created a table in MSSQL named MyReferences and then a typed dataset to connect to it.
Then I realized that I needed to add a column to MyReferences table and then I did it.
The problem is that I cannot find a way to add the new column to the typed dataset. I am unable to view it in the available columns.
Can anyone help me?
I'm using Visual Studio 2005 sp1 and C#.
Best regards
Alessandro
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Aug 11, 2006
[EDIT #2]
Using this query:
Code:
INSERT INTO Users (userName, UserSalt, UserHash1, UserHash2, UT_memberID)
select memberFirstName + '.' + memberLastName + '56' as userName, '{AxxxxxDE-6xx6-4xxD-Bxx9-3xxxx79xxxxE}',
'{4xxxxxx6-8xx5-6xxD-Cxx6-4xxxFxxx1xx9}', '{0xxx8xxE-Cxx4-6xx8-ExxB-Dxxxx4xxx2xC}', members.memberID
From members
Inner Join groupLeaders ON members.memberID = groupLeaders.memberID
SELECT @@Identity AS UserID
How can I modify the portion that is inserting the '56' at the end of each username to do the following:
1) check to see if username already exists in the database (using a query with "LIKE %'")
2) if not, create the username "as-is" or how it should be without the number
3) if already exists, get a count of records matching your search criteria .... now make a new username + + (count + 1).ToString();
Any thoughts... I am struggling to put these two pieces together.
Thanks,
Zoop
[EDIT - original post below this]
I have modified my method to make this a bit easier. I added a memberID field to my [Users] table so that I can update my [Members] table in a difference statement after the insert takes place.
I have the following query, and it completes succesfully in query analyzer (though I haven't actually executed the SP, just testing the syntax...) anyway, here is what I have:
Code:
INSERT INTO Users (userName, UserSalt, UserHash1, UserHash2, UT_memberID)
select memberFirstName + '.' + memberLastName + '56' as userName, '{AxxxxxDE-6xx6-4xxD-Bxx9-3xxxx79xxxxE}',
'{4xxxxxx6-8xx5-6xxD-Cxx6-4xxxFxxx1xx9}', '{0xxx8xxE-Cxx4-6xx8-ExxB-Dxxxx4xxx2xC}', members.memberID
From members
Inner Join groupLeaders ON members.memberID = groupLeaders.memberID
SELECT @@Identity AS UserID
I am hoping this will create a user for all members whose 'memberID' can be found in the groupLeaders table... is this correct?
Also, notice the 56 being appended to the end of each username. I would like this to be a random number generated within a given range... can this be done? any advice?
Thanks,
Zoop
[Original post below - provide more background]
I have three tables involved with this insert/update:
[Members]
-memberID
-memberFirstName
-memberLastName
-UserID
[GroupLeaders]
-groupLeaderID
-memberID
[Users]
-UserID
-Username
-UserSalt
-UserHash1
-UserHash2
I want to insert into the [Users] table the memberFirstName.memberLastName + randomNum into the 'UserName' column from the [Members] table. Also, I want to make all passwords the same, in this case I know the Salt, Hash1, Hash2 I will be using and would like to pass these in for the 'UserHash1' 'UserHash2' fields.
Now, I only want to make this insert where the memberID is in the GroupLeaders table. and Finally, I need to Update my Members table with a UserID where the memberID matches the one used from the groupLeaders table.
Does anyone have any ideas on how I can accomplish this, even if it requires adding a temporary field to one of my tables... here is what I have so far, but am recieving errors and can't quite figure this one out. (btw - I also don't know how to gen the rand num and was using the literal 23 as a placeholder.) Thanks...
Code:
INSERT INTO Users (userName, UserSalt, UserHash1, UserHash2)
select a.memberFirstName + '.' + a.memberLastName + '23' + as userName, '{AA99FCDE-6E06-437D-B9E9-3E3D27955C3E}',
'{7xxxxxx2-4xx6-9xx1-7xx9-4x3xx4Axxx59}', '{0xx8xxE-Cxx4-6xxx-xxxx-Fxx3xxxx3xxF}', b.memberID as newMemID
From members a, groupLeaders b
Where a.memberID = b.memberID
SELECT @@Identity AS UserID
Update Members Set UserID = Ident_Current('Users')
where memberID = newMemID
Any help is appreciated!
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Apr 8, 2004
I need a fresh set of eyes.
On a daily basis I need to perform a bulk update. Table totals about 50,000 records with approximately 5,000 changing (deletes, edits, and new records) per day. I'd like to push just the updates somehow, but VB is too slow and I haven't found a way in to handle it in DTS. Not much experience w/ DTS.
I'm transfering between two SQL 2000 servers w/ a VB app sitting in the middle.
Any ideas?
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Feb 13, 2008
Hello,
I am trying to read in from a csv file which works like this:
DECLARE @doesExist INT
DECLARE @fileName VARCHAR(200)
SET @fileName = 'c:file.csv'
SET NOCOUNT ON
EXEC xp_fileexist "' + @fileName + '", @doesExist OUTPUT
SET NOCOUNT OFF
IF @doesExist = 1
BEGIN
BULK INSERT OrdersBulk
FROM "' + @fileName + '"
WITH
(
FIELDTERMINATOR = ',',
ROWTERMINATOR = ''
)
END
ELSE
print('Error cant find file')
What I want to do is check another table before each line inserts, if the data already exists I want to do an UPDATE.
I think i can do what i need with a cursor but I think the bulk update just pushes all the data up and will not allow me to put in the cursor.
So is there a way i can read the csv in a cursor instead of using the bulk insert so i can examine each row?
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Feb 8, 2006
Hello,
I am using a sqldatareader to get back a whole set of data.
The columns are id, data_id and data_desc
for example, the collection is id data_id data_desc0 100 this is name for id 00 101 this is address for id 00 102 this is gender for id 01 100 this is name for id 11 101 this is address for id 11 102 this is gender for id 12 100 this is name for id 22 101 this is address for id 22 102 this is gender for id 23 100 this is name for id 33 101 this is address for id 33 102 this is gender for id 3
I want to be able to go thru' this list and break up for each id and create a txt file. So, i will have four text files.
txt0.txt will contain100, this is name for id 0 101, this is address for id 0102, this is gender for id 0
I would like to know, how do i use a dataview to break up the sqldatareader so i can then repeat the loop for each id and generate the text file.
I don't have a problem generating the text file.
Please let me know, how should i go about it.
Thanks a bunch,-Sean
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