RadAjaxLoadingPanel causes error when exporting a txt file

[sf]

in my button click event i have:

StringBuilder strTXTFileBuilder = new StringBuilder();

Response.Clear();

Response.AddHeader("content-disposition", "attachment;filename="ExportResult.txt");

Response.Charset = "";


strTXTFileBuilder.Append ("FirstItem:")...... // code to populate the stringbuilder

Response.ContentType = "application/vnd.text";

StringWriter stringWrite = new StringWriter();

HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);

Response.Write(strTXTFileBuilder.ToString());

Response.End();

it works without RadAjaxLoadingPanel. Once I put onto the page a RadAjaxLoadingPanel, when i click on the button again i get error:
Line: 6
Error: Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled.
Details: Error parsing near '


any idea what am i doing wrong? please help
thanks in advance

[Daniel]

Hello,

It is not possible to transfer a file in asynchronous request - this is why you get an error. As we know RadAjaxLoadingPanel works with ajax requests only.
In other words, this control is not suitable for your scenario.

Regards,
Daniel
the Telerik team