File download from server. file is under the Telerik grid. It giving server error.

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Am trying to download a file from server after clicking the file which is under the Telerik Grid. The code is below

C#

protected void RadGrid1_OnItemCommand(object source, Telerik.Web.UI.GridCommandEventArgs e)
    {
        try
        {
            //filepath to be changed
            if (e.CommandName == "FileName")
            {
                GridDataItem item = e.Item as GridDataItem;
                string strFileName = item.GetDataKeyValue("File Name").ToString();
                Response.ContentType = "APPLICATION/OCTET-STREAM";
                System.String disHeader = "Attachment; Filename=\"" + strFileName + "\"";
                Response.AppendHeader("Content-Disposition", disHeader);
 
                // transfer the file byte-by-byte to the response object
                GridDataItem parentItem = e.Item.OwnerTableView.ParentItem;
                string strFolderName = parentItem.GetDataKeyValue("Folder Name").ToString();
                string strFolderPath = System.IO.Path.Combine(DashLiteConstants.Pages.ArchivedCaptFilesPage.ArchivedFilesPath, strFolderName);
                string strFilePath = System.IO.Path.Combine(strFolderPath, strFileName);
                System.IO.FileInfo fileToDownload = new System.IO.FileInfo(strFilePath);
                Response.Flush();
                Response.WriteFile(fileToDownload.FullName);
                Response.End();
            }
        }
        catch (Exception ex)
        {
            Response.Write(ex.Message);
            //throw;
        }
       
    }

it's giving server error

Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed.

Please suggest me solution for this.

Posted 20-Jun-13 20:31pm

kishore.koorma

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Comments

AlphaDeltaTheta 21-Jun-13 3:08am

Can you attach the stack trace, inner exception (if any). It is difficult to guess from an exception statement...

For the error, I guess, something wrong with the request or response...

kishore.koorma 21-Jun-13 3:44am

Here is the inner exception

<pre lang="c#"><pre>function Sys$WebForms$PageRequestManager$_endPostBack(error, executor, data) {
if (this._request === executor.get_webRequest()) {
this._processingRequest = false;
this._additionalInput = null;
this._request = null;
}
var handler = this._get_eventHandlerList().getHandler("endRequest");
var errorHandled = false;
if (handler) {
var eventArgs = new Sys.WebForms.EndRequestEventArgs(error, data ? data.dataItems : {}, executor);
handler(this, eventArgs);
errorHandled = eventArgs.get_errorHandled();
}
if (error && !errorHandled) {
throw error; }
}</pre></pre>

and here

<pre lang="c#">var browserHandler;
if (element.addEventListener) {
browserHandler = function(e) {
return handler.call(element, new Sys.UI.DomEvent(e));
}
element.addEventListener(eventName, browserHandler, false);
}
else if (element.attachEvent) {
browserHandler = function() {
var e = {};
try {e = Sys.UI.DomElement._getWindow(element).event} catch(ex) {}
return handler.call(element, new Sys.UI.DomEvent(e));
}
element.attachEvent('on' + eventName, browserHandler);
}
eventCache[eventCache.length] = {handler: handler, browserHandler: browserHandler, autoRemove: autoRemove };
if (autoRemove) {
var d = element.dispose;
if (d !== Sys.UI.DomEvent._disposeHandlers) {
element.dispose = Sys.UI.DomEvent._disposeHandlers;
if (typeof(d) !== "undefined") {
element._chainDispose = d;
}
}
}
}</pre>

AlphaDeltaTheta 21-Jun-13 3:56am

This is the error handler generated by ASP.NET... Not this, I'm asking where in your code do you get that error. OR is it entirely generated code? Give me the StackTrace.

kishore.koorma 21-Jun-13 4:25am

While debugging after this method(protected void RadGrid1_OnItemCommand(object source, Telerik.Web.UI.GridCommandEventArgs e)) blank screen is coming it is jumping to that dynamic script.

AlphaDeltaTheta 21-Jun-13 4:30am

Click on exception details on the dialog box, navigate to InnerException and see

kishore.koorma 21-Jun-13 4:55am

The dialog bax with the name Microsoft Visual Studio, error message, and three buttons Break, Continue, Ignore. No exception details.

AlphaDeltaTheta 21-Jun-13 4:58am

? Harder to debug in this situation... Out of Ideas...

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