Not working in some IE10s

2 posts, 0 answers
  1. Thomas E
    Thomas E avatar
    6 posts
    Member since:
    Oct 2013

    Posted 03 Oct 2013 Link to this post


    Using the RadAsync Upload and it's failing for some IE10s. (Red Dot after Upload).
    Forms Authentication.
    Location specific authorization for Telerik.Web.UI.WebResource.axd.
    Windows8 Client
    IE10 browser only fails. -- Some client systems with IE10 succeed.

    Any help would be appreciated
  2. Hristo Valyavicharski
    Hristo Valyavicharski avatar
    975 posts

    Posted 08 Oct 2013 Link to this post

    Hi Thomas,

    The red dot usually appears, when the file validation fails. This happens when uploaded file exceeds the maximum allowed file size or when it is of file type that is not allowed. Try to handle OnClientValidationFailed event and check if this event will be fired:
    <telerik:RadAsyncUpload runat="server" ID="RadAsyncUpload1" OnClientValidationFailed="OnClientValidationFailed"></telerik:RadAsyncUpload>

    function OnClientValidationFailed(sender, args) {
        var fileExtention = args.get_fileName().substring(args.get_fileName().lastIndexOf('.') + 1, args.get_fileName().length);
        if (args.get_fileName().lastIndexOf('.')!=-1) {//this checks if the extension is correct
            if (sender.get_allowedFileExtensions().indexOf(fileExtention)==-1) {
                alert("Wrong Extension!");
            else {
                alert("Wrong file size!");
        else {
            alert("not correct extension!");

    Hristo Valyavicharski
    If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to the blog feed now.
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