ASP.Net将文件下载到客户端浏览器 [英] ASP.Net Download file to client browser

问题描述

我正在编写一个简单的测试页面，在按钮点击下载文本文件到浏览器。我有一个非常奇怪的错误，我从来没有见过。任何想法？

I'm writing a simple test page to download a text file to a browser on button click. I am getting a really strange error that I have never seen before. Any thoughts?

错误发生在'Response.End（）;'，文件永远不会访问客户端浏览器

The error occures on 'Response.End();' and the file never gets to the client browser

代码：

  string filePath = "C:\\test.txt";
  FileInfo file = new FileInfo(filePath);
  if (file.Exists)
  {
    Response.ClearContent();
    Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
    Response.AddHeader("Content-Length", file.Length.ToString());
    Response.ContentType = "text/plain";
    Response.TransmitFile(file.FullName);
    Response.End();
  }

错误：

无法评估表达式，因为代码已优化，或本机框架位于调用堆栈之上。

Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack.

推荐答案

尝试将其更改为。

 Response.Clear();
 Response.ClearHeaders();
 Response.ClearContent();
 Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name);
 Response.AddHeader("Content-Length", file.Length.ToString());
 Response.ContentType = "text/plain";
 Response.Flush();
 Response.TransmitFile(file.FullName);
 Response.End();

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