使用软件打开文件

 当点击文件链接对象时，弹出对话框让用户选择是打开还是另存为本地文件的实现方法。

          //value为文件路径
            string tmpFileName = value;
            FileInfo tmpFI = new FileInfo(tmpFileName);
            Response.Clear();
            Response.ClearHeaders();
            Response.Buffer = false;

                 Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(Path.GetFileName(tmpFileName), System.Text.Encoding.UTF8));
            Response.AppendHeader("Content-Length", tmpFI.Length.ToString());
            Response.ContentType = "application/octet-stream";
            Response.WriteFile(tmpFileName);
            Response.Flush();
            Response.End();