在不写入磁盘的情况下从streamwriter输出.txt文件?

试一试 System.IO.MemoryStream

System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.IO.StreamWriter sw = new System.IO.StreamWriter(ms);
sw.Write("hello");

我最近为一个XML文件做了这项工作,您应该很容易适应

protected void Page_Load(object sender, EventArgs e)
        {
            Response.Clear();
            Response.AppendHeader("content-disposition", "attachment; filename=myfile.xml");
            Response.ContentType = "text/xml";
            UTF8Encoding encoding = new UTF8Encoding();
            Response.BinaryWrite(encoding.GetBytes("my string"));
            Response.Flush();
            Response.End();
        }

或使用response.binarywrite(byte[]);

Response.AppendHeader("Content-Disposition", @"Attachment; Filename=MyFile.txt");                                               
Response.ContentType = "plain/text";    
Response.BinaryWrite(textFileBytes);

像这样的东西应该管用。如果流中有文本文件,则可以轻松地从中获取字节[]。

编辑:请参见上面的内容,但要明显更改内容类型。