Resolving RadAsyncUpload does not have permission to write files in the TemporaryFolder Error

Environment

Property	Value
Product	RadAsyncUpload for ASP.NET AJAX
Version	all

Description

I encountered an error message that says "RadAsyncUpload does not have permission to write files in the TemporaryFolder" while using RadAsyncUpload for ASP.NET AJAX. How to solve it?

Solution

To resolve the "RadAsyncUpload does not have permission to write files in the TemporaryFolder" error, you can try the following solutions:

1. Give write permission to both the Temporary and Target folders. Right-click on the folder, go to Properties, navigate to the Security tab, click on Add, add a new user or select Everyone, and check the "Full Control" checkbox.
2. Delete the file or folder named 'RadUploadTestFile' from the 'TemporaryFolder' directory.
3. If you are running Telerik RadAsyncUploader inside an Azure App Service, you need to set the Temporary folder to a shared folder among all used instances. Refer to the following resources for more information:
   • Microsoft Azure blog post on sharing folders in Azure
   • Telerik forum post on using AsyncUpload with Azure and Blob Service

Notes

• Make sure to adjust the folder permissions according to your specific setup and security requirements.
• Ensure that the Temporary folder is accessible and has the necessary write permissions for the RadAsyncUpload control to function properly.