迁移项目至新环境后Telerik组件无法运行求助

Hey there, let's work through this assembly loading issue you're hitting after migrating your project to a new environment. That specific HRESULT (0x80131515) typically signals issues related to file permissions, blocked files, or mismatched assembly versions. Here are the most common fixes to try:

• Unblock the Telerik assembly file
  If you copied the Telerik.Web.UI.dll from another machine or downloaded it from the web, Windows might have marked it as "blocked" for security reasons. Right-click the DLL file in your project's bin directory, go to Properties, and look for an "Unblock" checkbox at the bottom of the General tab. Check it and click Apply—this is one of the most frequent causes of this error.

• Verify assembly version consistency
  Double-check that the version of Telerik.Web.UI referenced in your project matches the DLL in your bin folder:

  1. In Visual Studio, right-click the Telerik.Web.UI reference in your project and select Properties.
  2. Note the version number (should be 2016.2.504.45).
  3. Navigate to your project's bin directory, right-click the Telerik.Web.UI.dll file, go to the Details tab, and confirm the file version matches exactly.
     If there's a mismatch, update your project reference to point to the correct DLL, or re-deploy the right version to the new environment.

• Ensure proper folder permissions
  Make sure the identity running your application (e.g., IIS AppPool user, local service account) has read access to the bin directory containing the Telerik DLL. For IIS:

  1. Open IIS Manager, find your application pool.
  2. Check the identity under Advanced Settings > Identity.
  3. Navigate to your project's root folder, right-click > Properties > Security, and add the app pool identity with Read permissions.

• Confirm all dependent assemblies are present
  Telerik.Web.UI often relies on companion DLLs like Telerik.Web.UI.Skins.dll or other Telerik components. Ensure all these related DLLs are also present in your bin directory, and their versions match the main Telerik.Web.UI assembly.

• Check web.config for correct assembly bindings
  Open your web.config file and look for the <assemblyBinding> section under <runtime>. Make sure there's a <dependentAssembly> entry for Telerik.Web.UI that specifies the correct version and public key token:

  <dependentAssembly>
    <assemblyIdentity name="Telerik.Web.UI" publicKeyToken="121fae78165ba3d4" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-2016.2.504.45" newVersion="2016.2.504.45" />
  </dependentAssembly>
  

  If this entry is missing or has incorrect version numbers, update it to match your target assembly.

• Reinstall the Telerik NuGet package (if applicable)
  If your project uses NuGet to manage Telerik dependencies, try uninstalling and reinstalling the specific version (2016.2.504.45) in the new environment. This ensures all dependencies are properly restored and deployed.

Advanced Troubleshooting #

If none of the above fixes work, use the Assembly Binding Log Viewer (fuslogvw.exe) to get detailed logs about why the assembly is failing to load. This tool will show you exactly where the runtime is looking for the DLL, whether it's finding a mismatched version, or hitting a permission block.

内容的提问来源于stack exchange，提问作者Ezell Buoee