Issue with multiple Ajax AsyncFileUpload in a single aspx page

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Hi all,
I am using two AsyncFileUpload in a page ...
It works fine if I browse the correct formats which is specified in the OnClientUploadStarted event. But if I browse the wrong formats, it shows alert as I mentioned in the method then it throws error like
"Server Response Error:'Unknown Server Error'.
Here is my javascript code

JavaScript

function uploadError(sender, args) {
        try {
            checkExtension(sender, args);
            alert('Error: File not uploaded');
        }
        catch (e) {
          //  alert(e.message);
        }
    }



    function checkExtension(sender, args) {


        try{
            var filename = args.get_fileName().toLowerCase();
            var ext = filename.substring(filename.lastIndexOf(".") + 1);
            if (ext != 'jpg' && ext != 'png' && ext != 'jpeg' && ext != 'gif') {

                alert('Invalid File Type (Only .png, .gif and .jpg)');

                return false;
            }
            else
                return true;
        }
        catch (e) {
        }
    }



    function uploadComplete(sender, args) {
        try {
            alert('File uploaded successfully');
        }
        catch (e) {
         //   alert(e.message);
        }
    }

ASP.NET

<cc1:AsyncFileUpload
           ID="AsyncFileUpload1"
            runat="server"
           OnUploadedComplete="AsyncFileUpload1_UploadComplete"
           OnClientUploadComplete="uploadComplete"
           OnClientUploadError="uploadError"
            önClientUploadStarted="checkExtension"
           CompleteBackColor="SkyBlue"
           UploaderStyle="Traditional"
           BackColor="IndianRed"
           ErrorBackColor="Salmon" />

       <cc1:AsyncFileUpload
           ID="AsyncFileUpload2"
            runat="server"
           OnUploadedComplete="AsyncFileUpload2_UploadComplete"
           OnClientUploadComplete="uploadComplete"
           OnClientUploadError="uploadError"
            önClientUploadStarted="checkExtension"
           CompleteBackColor="SkyBlue"
           UploaderStyle="Traditional"
           BackColor="IndianRed"
           ErrorBackColor="Salmon" />

where cc1 represents

HTML

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>

If I use only one Asnfileupload control, it works fine. But using multiple controls and browsing to wrong file formats throws the Error "Server Response Error:'Unknown Server Error'.

Any help would be highly appreciated

Posted 16-Apr-13 21:47pm

Naz_Firdouse

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Zafar Sultan · Answer 1 · 2013-04-16T22:41:00

I am using:

HTML

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>

Replace your entire script with following:

JavaScript

<script language="javascript" type="text/javascript">
        function uploadError(sender, args) {
            alert('Error: File not uploaded');
        }

        function checkExtension(sender, args) {
            var filename = args.get_fileName().toLowerCase();
            var ext = filename.substring(filename.lastIndexOf(".") + 1);
            if (ext != 'jpg' && ext != 'png' && ext != 'jpeg' && ext != 'gif') {
                alert('Invalid File Type (Only .png, .gif and .jpg)');
                return false;
            }
            else
                return true;
        }
    </script>

This is the markup for two AsyncFileUpload controls

XML

<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" EnablePartialRendering="true"
           CombineScripts="false">
       </asp:ToolkitScriptManager>
       <asp:AsyncFileUpload ID="AsyncFileUpload1" runat="server" OnUploadedComplete="AsyncFileUpload1_UploadComplete"
           OnClientUploadError="uploadError" OnClientUploadStarted="checkExtension" CompleteBackColor="SkyBlue"
           UploaderStyle="Traditional" BackColor="IndianRed" ErrorBackColor="Salmon" />
       <asp:AsyncFileUpload ID="AsyncFileUpload2" runat="server" OnUploadedComplete="AsyncFileUpload2_UploadComplete"
           OnClientUploadError="uploadError" OnClientUploadStarted="checkExtension" CompleteBackColor="SkyBlue"
           UploaderStyle="Traditional" BackColor="IndianRed" ErrorBackColor="Salmon" />

This is the code-behind:

C#

protected void AsyncFileUpload1_UploadComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e)
    {
        string FolderPath = Server.MapPath("./Documents") + "\\";
        string FileName = AsyncFileUpload1.FileName;
        string fileExtension = System.IO.Path.GetExtension(FolderPath + FileName);
        if (fileExtension == ".jpg" || fileExtension == ".png" || fileExtension == ".jpeg" || fileExtension == ".gif")
        {
            AsyncFileUpload1.SaveAs(FolderPath + FileName);
            ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "Success", "alert('File uploaded');", true);
        }
    }
    protected void AsyncFileUpload2_UploadComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e)
    {
        string FolderPath = Server.MapPath("./Documents") + "\\";
        string FileName = AsyncFileUpload2.FileName;
        string fileExtension = System.IO.Path.GetExtension(FolderPath + FileName);
        if (fileExtension == ".jpg" || fileExtension == ".png" || fileExtension == ".jpeg" || fileExtension == ".gif")
        {
            AsyncFileUpload2.SaveAs(FolderPath + FileName);
            ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "Success", "alert('File uploaded');", true);
        }
    }

This is working fine for me. Please note that I am using AjaxControlToolkit 4.0 January 2013 release.