服务器无法设置内容类型后，HTTP标头已被送往 [英] Server cannot set content type after HTTP headers have been sent

问题描述

我在以下code得到一个错误（HTTP标头之后被送往服务器无法设置内容类型。）（的ContentType 线）。我应该怎么改？

I get an error (Server cannot set content type after HTTP headers have been sent.) on the following code (ContentType line). What should I change?

System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
response.ClearContent();
response.ContentType = "text/plain";
response.AddHeader("Content-Disposition", "attachment; filename=" + System.IO.Path.GetFileName(PervasiveConstants.DownloadZipLocation) + ";");
response.TransmitFile(PervasiveConstants.DownloadZipLocation);
response.Flush();
response.End();  

这是一个SharePoint 2010的WebPart内。

This is within a Sharepoint 2010 webpart.

推荐答案

尝试设置 response.BufferOutput = TRUE; 。为此设置应答后，立即变量。

Try setting response.BufferOutput = true;. Do this immediately after setting the response variable.

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