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。我得到一个非常奇怪的错误，我从来没有见过。有什么想法吗？
错误发生在’Response.End();’并且文件永远不会访问客户端浏览器
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：
Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack.
解决方法
尝试改变它。
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();
