Prevent Page Submitting While Uploading File

Prevent page submit if file upload is in progress

Clicking on submit button if file upload is in progress

prevents the page submit and pops up a message that explains why the action is cancelled.

The following code snippets demonstrate how it can be used:

Prevent page submit when RadAsyncUpload is in Classic RenderMode

<telerik:RadAsyncUpload RenderMode="Classic" runat="server" ID="RadAsyncUpload1">
</telerik:RadAsyncUpload>
<input type="button" onclick="submitPage()" value="submit page" />

var $ = $telerik.$;

function submitPage() {
    //finds all file uploads that are currently in progress
    var uploadingRows = $(".RadAsyncUpload").find(".ruUploadProgress");
    //iterates and checks if there are any file uploads that are successfully completed or failed and if yes - pop-up an alert box and prevent page submitting 
    for (var i = 0; i < uploadingRows.length; i++) {
        if (!$(uploadingRows[i]).hasClass("ruUploadCancelled") && !$(uploadingRows[i]).hasClass("ruUploadFailure") && !$(uploadingRows[i]).hasClass("ruUploadSuccess")) {
            alert("you could not submit the page during upload :)");
            return;
        }
    }

    theForm.submit();
}

Prevent page submit when RadAsyncUpload is in Lightweight RenderMode

<telerik:RadAsyncUpload RenderMode="Lightweight" runat="server" ID="RadAsyncUpload1">
</telerik:RadAsyncUpload>
<input type="button" onclick="submitPage()" value="submit page" />

var $ = $telerik.$;

function submitPage() {
    //Checks if there are file uploads that are currently in progress
    var uploadingRows = $(".RadAsyncUpload").find(".ruUploading");
    if (uploadingRows.length > 0) {
        alert("you could not submit the page during upload :)");
        return;
    }

    theForm.submit();
}