Within a page, I have the following -
<telerik:GridAttachmentColumn ... AllowedFileExtensions=".png,.gif,.jpg,.jpeg" ... />
When editing an item within the grid, and clicking the 'Select' option on the grid's edit column related to the GridAttachmentColumn, I'm receiving this popup -
I want to restrict the files a user can select to upload through this dialog to those defined within the 'AllowedFileExtensions' property of the control, either from within the HTML, or in the code behind.
How can I go about doing that? If this is not the correct place to be asking this question, where on the forum should I be asking this question?