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Getting Started with ASP.NET Web Forms and MS Visual Studio

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The .NET Framework (pronounced dot net) is a software framework developed by Microsoft that runs primarily on Microsoft Windows. It includes a large class library known as Framework Class Library (FCL) and provides language interoperability (each language can use code written in other languages) across several programming languages. Programs written for .NET Framework execute in a software environment (as contrasted to hardware environment), known as Common Language Runtime (CLR), an application virtual machine that provides services such as security, memory management, and exception handling. FCL and CLR together constitute .NET Framework. Read more.

 

The following are some resources to learn about ASP.NET, Visual Studio and other Microsoft products:

— W3Schools ASP.NET 4 Tutorial
— Tutorial Points ASP.NET Tutorial
— MS Introduction to ASP.NET Web Forms
— ASP.NET Hands On Project ASP.NET Project
— Free Microsoft Training Delivered by Experts

 

ASP.NET Issue: The SqlDataSource control does not have a naming container…

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I have received the following .NET error several times in the past when developing nested databound controls. I have found the solution does not have good coverage on the Internet. The curious thing about this error is that it does not appear until 2nd or 3rd postback on the page.

[box]The SqlDataSource control does not have a naming container. Ensure that the control is added to the page before calling DataBind[/box]

The cause is simple, however. It occurs when you use a ControlParameter on a DataSource that is within another data control. I ran into it again today on a Gridview within a DataList for example. The error occurs because the inner control cannot find the control containing the parameter for some reason.

The solution is simple as well. You must remove the ControlParameter from the DataSource that is inside the other control. This can be accomplished by using a normal <asp:Parameter> and assigning a DefaultValue to it when the outer control binds.