按钮实现下载功能

按钮事件实现下载：

private void ResponseFile(string path)
        {
            System.IO.FileInfo fi = new System.IO.FileInfo(path);
            Response.Clear();
            Response.ClearHeaders();
            Response.Buffer=false;

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

            System.Web.HttpUtility.UrlEncode(System.Text.Encoding.UTF8.GetBytes(path)));
            Response.AppendHeader("Content-Length", fi.Length.ToString());
            Response.ContentType = "application/octet-stream";
            Response.WriteFile(path);
            Response.Flush();
            Response.End();
        }

path：设置您需要让别人下载的文件路径和文件名，任何格式的文件都可以，路径最好用虚拟路径。