asp.net 文件下载，报文头设置

1.设置请求类型：

context.Response.ContentType = "application/download";

2.设置报文头

string EncodeFileName = HttpUtility.UrlEncode(“1.txt”, System.Text.Encoding.UTF8);

context.Response.AddHeader("Content-Disposition", "attachment;filename=" + EncodeFileName + ";");

3.输出数据流

context.Response.BinaryWrite(System.IO.File.ReadAllBytes(RealFile));//返回文件数据给客户端下载
            context.Response.Flush();
            context.Response.End();