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How to Solve “Error Creating Control” Error Message (ASP.Net Site)

If you face this error while trying to open a web application project

Error Creating Control – control_Name
‘/LM/W3SVC/1/Root/Project_Name’ is not a valid IIS application.

ErrorCreatingControlSnapshot

 

You can resolve this error by following the below steps , the root cause of this error is the incorrect mapping between web application project and the virtual directory in your IIS.
To Resolve this error , follow the following steps:

1-Right click – you web application project and select Properties -> Web
2- in the server section choose Use IIS Web Server -> then click Create Virtual.
3- Clean your project from any DDLs that was previously complied and compile your project again.

By doing the above steps this issue should got resolved.

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Develop .Net 1.1 Web Application on windows Vista (IIS 7)

To develop Web application using .Net 1.1 and Visual Studio 2003 on Vista OS (IIS 7), follow the below steps:

  •   First of all you have to install Visual Studio 2003. this will install .Net 1.1 also

  •   Install all service packs for .Net framwork 1.1.

  •   Open the IIS Manager and navigate to the server root. (Not a website root, above that – the machine name.) and double click on "ISAPI and CGI restrictions."

  •   Add the v1.1 aspnet_isapi.dll to "Allowed" restrictions

                  (it’ll be at %WinDir%\Microsoft.NET\Framework\v1.1.4322\aspnet_isapi.dll)

  •   Navigate to the website root in IIS manager and double-click "ISAPI Filters."

  •   Add the ASP.NET 1.1 ISAPI filter from %WinDir%\Microsoft.NET\Framework\v1.1.4322\aspnet_filter.dll

  •   Go to the website root again in IIS manager and loo at "Advanced Settings."

  •   Ensure the website is using an ASP.NET 1.1 Application Pool (Vista created one for me when I installed .NET 1.1 – you may need to create one yourself.)

    Done.. Now you can develop and debug .Net 1.1 Web Applications on Vista OS and IIS 7.0