Question

Below is my code to download at client when user click on a download link

Response.AppendHeader("Content-Disposition", "attachment; 
                       filename=.pdf");

Response.TransmitFile(FileName);

Response.End();

Content Types are of different:
pdf,word,swf,.zip,ppt,xls

But i’m getting the same issue as attached.

Answer 1

Use application/octet-stream for all stream type:

                HttpContext.Current.Response.Clear();
                HttpContext.Current.Response.ContentType = "application/octet-stream";
                HttpContext.Current.Response.AppendHeader("content-disposition",string.Format("attachment; filename={0}", "Path.GetFileName(strVirtualFilePath);"));
                HttpContext.Current.Response.WriteFile(_strVirtualFilePath);
                HttpContext.Current.Response.End();
                HttpContext.Current.Response.Flush();