How to obtain underlying provider errors by using ADO.NET in Visual C++ .NET

This article was previously published under Q308651
This article has been archived.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 308650.

This article refers to the System::Data::OleDb namespace in the Microsoft .NET Framework Class Library.
SUMMARY
Managed providers can raise several exceptions. To obtain more detailed information about the cause, you need access to provider-specific error information. This article shows how to gather this information.

Requirements

The following list outlines the recommended hardware, software, network infrastructure, and service packs that are required:
  • Microsoft .NET Framework
  • Microsoft Visual C++ .NET
This article assumes that you are familiar with the following topics:
  • Exceptions and error handling
  • Microsoft OLE DB

Technique description

You must wrap your code in a "try... catch" block to catch the exception and process the error collection from the OLEDBException.

Create project and add code

  1. Create a new Managed C++ application. Name the project ProviderError.
  2. Open the ProviderError.CPP file. Copy the following code and paste it in to replace the default code built in by Microsoft Visual Studio .NET:
    #include "stdafx.h"#using <mscorlib.dll>#using <System.dll>#using <System.Data.dll>using namespace System;using namespace System::Data::OleDb;// This is the entry point for this application#ifdef _UNICODEint wmain(void)#elseint main(void)#endif{        OleDbConnection *myCn = new OleDbConnection("Provider=SQLOLEDB.1;Data Source=MyWrongServerName");        try	{            myCn->Open();	}        catch(OleDbException *ex)	{            Int32 i;            for (i = 0; i <= ex->Errors->Count - 1; i++)	   {				Console::WriteLine("Index # {0} \n Message: {1} \n Native: {2}" 					"\n Source: {3} \n SQL: {4} \n", i.ToString(), ex->Errors->Item[i]->Message, 					ex->Errors->Item[i]->NativeError.ToString(), ex->Errors->Item[i]->Source, 					ex->Errors->Item[i]->SQLState);	   }	}	return 0;}
  3. On the Debug menu, click Run without Debugging to run the application. A console window that contains the provider error should appear after about 10 to 15 seconds.

Troubleshooting

If you have a server called "MyWrongServerName", you may not get an error message.
Properties

Article ID: 308651 - Last Review: 01/16/2015 23:35:46 - Revision: 4.1

  • Microsoft ADO.NET 1.1
  • Microsoft ADO.NET 1.0
  • Microsoft Visual C++ .NET 2003 Standard Edition
  • Microsoft Visual C++ .NET 2002 Standard Edition
  • kbnosurvey kbarchive kbhowtomaster kbsystemdata KB308651
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