下载事件 //下载按钮事件 protected void lkb_downLoad_Click(object sender, EventArgs e) { //获取在隐藏控件的物理路径 string fullPath = hf_upPath.Value; //获取包含在路径中的文件名 string fileName = fullPath.Substring(fullPath.LastIndexOf('\\')+1); string extension = System.IO.Path.GetExtension(fullPath); //文件操作 FileInfo file = new FileInfo(fullPath); //清空缓存区的内容和HTTP头 Response.Clear(); Response.ClearContent(); Response.ClearHeaders(); //添加HTTP头 Response.AddHeader("Content-Disposition", "attachment;filename=" +fileName); Response.AddHeader("Content-Length", file.Length.ToString()); Response.AddHeader("Content-Transfer-Encoding", "binary"); //由于有多种类型文件 判断选择对应的ContentType switch (extension) { case ".docx": case ".doc": Response.ContentType = "application/msword"; break; case ".jpg": case ".jpeg": Response.ContentType = "image/jpeg"; break; case ".gif": Response.ContentType = "image/gif"; break; case ".txt": Response.ContentType = "text/plain"; break; case ".bmp": Response.ContentType = "application/x-bmp"; break; default: Response.ContentType = "application/octet-stream"; break; } //设置响应输出content的内容的编码 Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312"); //将文件写到输出流 Response.WriteFile(file.FullName); //向客户端发送当前缓冲区的输出(内容必须大于256字节) Response.Flush(); //使Web服务器停止处理脚本并返回当前结果 Response.End(); }