How do I trace the origin of "String or binary data would be trunc -- asp.net

asp.net : How do I trace the origin of "String or binary data would be trunc

Dave
7/14/2007 8:26:00 PM

I get this error: "String or binary data would be truncated" when I try to
insert data in the database. But the stack trace gives no clue as to what is
the offending data column. How can see the offending column?

Stack Trace
System.Data.SqlClient.SqlException was unhandled by user code
Message="String or binary data would be truncated.\r\nThe statement has
been terminated."
Source=".Net SqlClient Data Provider"
ErrorCode=-2146232060
Class=16
LineNumber=1
Number=8152
Procedure=""
Server="jones\\sqlexpress"
State=2
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.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.InternalExecuteNonQuery(DbAsyncResult
result, String methodName, Boolean sendToPipe)
at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
at
System.Web.UI.WebControls.SqlDataSourceView.ExecuteDbCommand(DbCommand
command, DataSourceOperation operation)
at
System.Web.UI.WebControls.SqlDataSourceView.ExecuteInsert(IDictionary values)
at System.Web.UI.WebControls.SqlDataSourceView.Insert(IDictionary
values)
at System.Web.UI.WebControls.SqlDataSource.Insert()
at CreateUser.CreateUserWizard1_CreatedUser(Object sender, EventArgs
e) in c:\Documents and Settings\Llewelyn Jones\My Documents\Visual Studio
2005\webRetail\CreateUser.aspx.cs:line 33
at System.Web.UI.WebControls.CreateUserWizard.OnCreatedUser(EventArgs
e)
at System.Web.UI.WebControls.CreateUserWizard.AttemptCreateUser()
at
System.Web.UI.WebControls.CreateUserWizard.OnNextButtonClick(WizardNavigationEventArgs e)
at System.Web.UI.WebControls.Wizard.OnBubbleEvent(Object source,
EventArgs e)
at System.Web.UI.WebControls.CreateUserWizard.OnBubbleEvent(Object
source, EventArgs e)
at
System.Web.UI.WebControls.Wizard.WizardChildTable.OnBubbleEvent(Object
source, EventArgs args)
at System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs
args)
at System.Web.UI.WebControls.Button.OnCommand(CommandEventArgs e)
at System.Web.UI.WebControls.Button.RaisePostBackEvent(String
eventArgument)
at
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler
sourceControl, String eventArgument)
at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
at System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

--

Eliyahu Goldin
7/15/2007 12:00:00 AM

The error is reported by the sql server whereas the stack trace comes from
your app. That's why you don't see in the stack any additional info. Catch
the actual query sent to the server either with the database tracer or with
a breakpoint in the application and see what column has a too long value.

--
Eliyahu Goldin,
Software Developer
Microsoft MVP [ASP.NET]
http://msmvps.com/blogs/egoldin
http://usableasp.net

[quoted text, click to view]

Alexey Smirnov
7/15/2007 12:56:11 AM

[quoted text, click to view]

The Insert statement of the SqlDataSource was failed, because some of
your columns could be bigger than the defined size, and db doesn't
allow you to insert data larger than a column definition. You should
either 1) perform validation to ensure that the form input parameters
are correct or 2) conform the data to the required internal db
structure.

1) Use MaxLength property, or a RegularExpressionValidator

<asp:TextBox MaxLength=3D"X"

2) Use Left function

INSERT .... Left(@parameter,X).....

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