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LinqDataSourceUpdateEventArgs.Exception Property

Gets the exception that was thrown while the data was being validated before the update operation.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web.Extensions (in System.Web.Extensions.dll)

public LinqDataSourceValidationException Exception { get; }

Property Value

Type: System.Web.UI.WebControls.LinqDataSourceValidationException
The exception, if an error occurred; otherwise, null.

If a validation exception is raised before the update operation is performed, the exception is stored in the Exception property. In an event handler for the Updating event, you can retrieve the exception through the Exception property.

The following example shows an event handler for the Updating event. It displays any validation exception messages by using a Label control.

Protected Sub LinqDataSource_Updating(ByVal sender As Object, _
        ByVal e As LinqDataSourceUpdateEventArgs)
    If (e.Exception IsNot Nothing) Then
        For Each innerException As KeyValuePair(Of String, Exception) _
               In e.Exception.InnerExceptions
            Label1.Text &= innerException.Key & ": " & _
                innerException.Value.Message & "<br />"
        Next
        e.ExceptionHandled = True
    End If
End Sub

[C#]

protected void LinqDataSource_Updating(object sender, 
        LinqDataSourceUpdateEventArgs e)
{
    if (e.Exception != null)
    {
        foreach (KeyValuePair<string, Exception> innerException in 
             e.Exception.InnerExceptions)
        {
        Label1.Text += innerException.Key + ": " + 
            innerException.Value.Message + "<br />";
        }
        e.ExceptionHandled = true;
    }
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5
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