Roadmap for using ADO in .NET (308044)

Caution ADO and ADO MD have not been fully tested in a Microsoft .NET Framework environment. They may cause intermittent issues, especially in service-based applications or in multithreaded applications. The techniques that are discussed in this article should only be used as a temporary measure during migration to ADO.NET. You should only use these techniques after you have conducted complete testing to make sure that there are no compatibility issues. Any issues that are caused by using ADO or ADO MD in this manner are unsupported. For more information, see the following article in the Microsoft Knowledge Base:

840667 You receive unexpected errors when using ADO and ADO MD in a .NET Framework application

MORE INFORMATION

Key Concepts

For more information about key concepts, see the following Microsoft Web sites:

General ADO Overview:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconoverviewofadonet.asp

General ADO Documentation:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/ado270/htm/dasdkadooverview.asp

ADO Rocks and Rolls in .NET:
http://www.microsoft.com/downloads/details.aspx?FamilyID=8bfe85a3-a957-4744-88ec-89112eae45c3&DisplayLang=en

Revisiting the Use of ADO in .NET Applications:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dndive/html/data08092001.asp

Help topic: COM Interop Part 1: C# Client Tutorial

How Tos

For how-to information, see the following resources:

Help topic: Accessing an ADO Recordset or Record from ADO.NET

Help topic: ADO Type mapping to .NET Framework Type

Help topic: Filling a DataSet with an ADO Recordset or Record

Quick Start: ADO Interoperability Technology Sample

The following sample illustrates how to retrieve data via an ADO Recordset on an ASPX page.

NOTE: The following path may be different, depending on where you installed the Microsoft .NET Framework Solution Developer Kit (SDK):

C:\Program Files\Microsoft.NET\FrameworkSDK\Samples\technologies\interop\basic\aspxtoado

Troubleshooting

If you encounter problems and need answers to your questions, it is recommended that you refer to the Microsoft Newsgroups, where you can share your experiences with your peers, or the Microsoft Knowledge Base, where you can search for articles about specific issues.

Microsoft ADO .NET public newsgroup:
news:microsoft.public.dotnet.framework.adonet

Search the Knowledge Base online:
http://support.microsoft.com/

Use the following keywords in your search to narrow the scope to ADO via COM Interop:

kbADONET kbInterop kbADO

MSDN .NET site:
http://msdn.microsoft.com/net/

Data access technologies Web site:
http://msdn.microsoft.com/dataaccess

Another useful method for learning and troubleshooting is first to verify that the ADO code works in Visual Basic 6, and then open the Visual Basic 6 project in Visual Studio .NET. The Upgrade Wizard creates a new Visual Basic .NET project that contains the converted ADO code.

Migration to ADO.NET

For information about migrating to ADO.NET, see the following:

Help topic: Comparison between ADO and ADO.NET

ADO.NET for the ADO programmer:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dndive/html/data09132001.asp