This article describes Silverlight settings to check when trying to upload a file in the media library, and the upload dialog doesn’t load.
You can find general information about uploading multiple files at once by using the following link:
File management - Uploading multiple files at once.
• The first requirement is Microsoft Silverlight needs to be installed on your computer or server.
• The second item to check is disk permissions for the
~/App_Data/CMSTemp/MultiFileUploader/ folder. Please ensure the application pool account on which IIS is running for your site, has the correct write disk permissions as mentioned in our documentation:
Disk permissions problems.
• Another item to check for your application to work correctly is, the MIME types used for Silverlight. These are used so your web server will recognize Silverlight content appropriately.
• Extension: .xaml
• MIME type: application/xaml+xml
• Extension: .xap
• MIME type: application/x-silverlight-app
You can find an example on how to add these to IIS by using the link below:
Silverlight IIS configuration.
• In some cases when using Internet Explorer, it may be necessary to add the domain name as a trusted site in your browser.
• Finally, you can force the system to only use the single-file uploader, by adding following key into your web.config file:
<add key="CMSUseSilverlightUploader" value="false" />