gridview按钮列的下载功能

    protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        //这里是模板列里面的按钮，需要设置CommandArgument ="<%# GridView1.Rows.Count %>"，否则出错
        if (e.CommandName == "Download")
        {
            FileDownload(@"F:\music\6-渴望.mp3");
        }
    }

    private void FileDownload(string FullFileName)
    {
        FileInfo DownloadFile = new FileInfo(FullFileName);
        Response.Clear();
        Response.ClearContent();
        Response.ClearHeaders();
        Response.Buffer = false;
        Response.ContentType = "application/octet-stream";
        Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(DownloadFile.FullName, System.Text.Encoding.UTF8));
        Response.AppendHeader("Content-Length", DownloadFile.Length.ToString());
        Response.AddHeader("Content-Transfer-Encoding", "binary");
        Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
        Response.WriteFile(DownloadFile.FullName);
        Response.Flush();
        Response.End();
    }

注意：

　　如果是在GridView在UpdatePanel下，就需要加入如下代码：

　　否则会报错