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How To Obtain Underlying Provider Errors by Using ADO.NET in Visual C# .NET

This article was previously published under Q308650
This article has been archived. It is offered "as is" and will no longer be updated.
For a Microsoft Visual Basic .NET version of this article, see 308043.
For a Microsoft Visual C++ .NET version of this article, see 308651.

This article refers to the following Microsoft .NET Framework Class Library namespace:
  • System.Data.OleDb


Managed providers can raise several exceptions. To obtain more detailed information about the cause, you need access to provider-specific error information.

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The following list outlines the recommended hardware, software, networkinfrastructure, and service packs that you need:
  • Microsoft .NET Framework
  • Microsoft Visual C# .NET
This article assumes that you are familiar with the following topics:
  • Exceptions
  • Microsoft OLE DB
  • Error handling
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Steps to Obtain Underlying Provider Errors

To obtain more detailed information about the cause of an exception, wrap your code in a try-catch block, catch the exception, and process the Errors collection from the OleDbException class.
  1. Open a new Visual C# .NET Windows Application project.
  2. Open Form1.cs in code, copy the following code, and paste the code at the beginning of the form:
    using System.Data.OleDb;					
  3. Copy the following code into the Form1 Load event:
    {    OleDbConnection cn        = new OleDbConnection("Provider=SQLOLEDB.1;Data Source=MyWrongServerName");    try    {        cn.Open();    }    catch (OleDbException ex)    {        for (int i = 0; i < ex.Errors.Count; i++)        {            MessageBox.Show("Index #" + i.ToString() + "\n" +                "Message: " + ex.Errors[i].Message + "\n" +                "Native: " + ex.Errors[i].NativeError.ToString() + "\n" +                "Source: " + ex.Errors[i].Source + "\n" +                "SQL: " + ex.Errors[i].SQLState + "\n");        }    }}					
  4. Run the application. A message box should appear after 10 to 15 seconds.
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If you have a server named "MyWrongServerName," you may not receive an error.

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Fore more information on .NET managed providers, refer to the following MSDN Web site:back to the top

Article ID: 308650 - Last Review: 01/16/2015 23:35:30 - Revision: 3.4

Microsoft ADO.NET 1.0, Microsoft Visual C# .NET 2002 Standard Edition, Microsoft ADO.NET 1.1, Microsoft Visual C# .NET 2003 Standard Edition

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