A guide on fixing the BC30002 The type Global.Telerik.Web.UI.RadGrid is not defined error

Environment

Product	Telerik UI for ASP.NET AJAX / RadGrid
Version	all

Description

I am getting a compilation error "BC30002: The type 'Global.Telerik.Web.UI.RadGrid' is not defined" in Visual Studio. This issue persists despite removing all references to old DLLs, cleaning, and recompiling the project.

Cause

This error may arise upon migration from RadControls for ASP.NET (Classic) to Telerik UI for ASP.NET AJAX due to improper assembly references, outdated entries in the web.config file, or issues related to the licenses.licx file.

Solution

Follow these steps to resolve the error:

• Ensure Correct Assembly Reference: Update the Telerik.Web.UI assembly reference in your project. Remove the existing reference and re-add it, ensuring it points to the new DLL file. Reference update instructions can be found here.

• Web.config Update: Ensure your web.config file's assembly version matches the version of the Telerik UI for ASP.NET AJAX DLLs you're using. Include an assembly binding redirect like the following:

xml

<configuration>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Telerik.Web.UI" publicKeyToken="121fae78165ba3d4" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-2024.2.513.462" newVersion="2024.2.513.462" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

• Delete the licenses.licx File Contents: Clear the contents of the licenses.licx file as described in the How To Fix License File Related Errors article.

• Update Control Registered Directive: If not using the Global Assembly Cache, update or remove fully qualified names from the control registered directive. For global access in all project pages, add the following to your web.config:

xml

<system.web>
  <compilation debug="true" targetFramework="4.8" />
  <httpRuntime targetFramework="4.8" />
  <pages>
    <controls>
      <add tagPrefix="telerik" namespace="Telerik.Web.UI" assembly="Telerik.Web.UI" />
    </controls>
  </pages>
</system.web>

• Clean Visual Studio and ASP.NET Cache: Follow the instructions to Clean Up ASP.NET and Visual Studio Cache and Temp Files.

• Restart Visual Studio and Your Development/Server Machine: This can help refresh any cached configurations or assemblies.

Additionally, check out this forum thread and the official Microsoft article for more information on the error.

If the issue persists after following these steps, please share any additional error messages or project configuration details for further assistance.

See Also

• Migration from ASP.NET (Classic) to ASP.NET AJAX
• Common Update Assembly Reference
• How To Fix License File Related Errors
• Clean Up ASP.NET and Visual Studio Cache and Temp Files