C#中使用Response下载

1、正常的从服务器端下载文件的流程：

System.IO.FileInfo file = new System.IO.FileInfo(s_path);

HttpContext.Current.Response.ContentType = "application/ms-download";

HttpContext.Current.Response.Clear();

HttpContext.Current.Response.AddHeader("Content-Type", "application/octet-stream");

HttpContext.Current.Response.Charset = "utf-8";

HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(file.Name, System.Text.Encoding.UTF8));

HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());

HttpContext.Current.Response.WriteFile(file.FullName);

HttpContext.Current.Response.Flush();

HttpContext.Current.Response.Clear();

HttpContext.Current.Response.End();

 

2、调试：对于最后一句代码HttpContext.Current.Response.End();

此语句执行后 后面的代码就不会被执行。

查看Log日志中记录的Exception的信息，显示HttpContext.Current.Response.End()这条语句正在停止进程，也就是不会再执行后面的代码。

 

3、总结：如果在调用该方法后还有要执行的代码，就屏蔽掉最后一句代码。

即为：

System.IO.FileInfo file = new System.IO.FileInfo(s_path);

HttpContext.Current.Response.ContentType = "application/ms-download";

HttpContext.Current.Response.Clear();

HttpContext.Current.Response.AddHeader("Content-Type", "application/octet-stream");

HttpContext.Current.Response.Charset = "utf-8";

HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(file.Name, System.Text.Encoding.UTF8));

HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString());

HttpContext.Current.Response.WriteFile(file.FullName);

HttpContext.Current.Response.Flush();

HttpContext.Current.Response.Clear();

//屏蔽该行代码

//HttpContext.Current.Response.End();