ASP.NET下载的一个奇怪问题
代码如下...谢谢看下代码！下载的时候总是下载的不是写入txt的内容，而是这个页面的网页代码内容！txt在相关文件夹中正确写入并且有

C# code

 if (!Directory.Exists(Server.MapPath("UserTemp")))            {                Directory.CreateDirectory(Server.MapPath("UserTemp"));            }            string path = Path.Combine("UserTemp//", "白名单导出_" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".txt");            string str5 = base.Server.MapPath(path);            if (File.Exists(str5))            {                File.Delete(str5);            }            //数据量大用另外一种方法            FileInfo file = new FileInfo(str5);//用于获取文件信息            StreamWriter textFile = null;            textFile = file.CreateText();            string sqlWhile = "SELECT WMobile FROM WMobile";            DataTable tab = new DataTable();            tab = DBCommonClass.DbAccessHelper.ExecuteDataTable(new DbCommandData(sqlWhile));            string strWhile = string.Empty;            for (int i = 0; i < tab.Rows.Count; i++)            {                string str = tab.Rows[i][0].ToString();                strWhile += str + "\r\n";            }            textFile.Write(strWhile);            textFile.Close();///////////////////////////////////////////////////下面就是下载代码了            //Response.Clear();//清空输出            //Response.Charset = "GB2312";//设定编码            //Response.ContentEncoding = System.Text.Encoding.UTF8;            //Response.AddHeader("Content-Disposition", "attachment;filename=" + Server.UrlEncode(file.Name));            //Response.AddHeader("Content-length", file.Length.ToString());            //Response.ContentType = "application/octet-stream";            ////ms-txt";            //Response.WriteFile(file.FullName);            //Response.End();            Response.Clear();            Response.ClearContent();            Response.ClearHeaders();            Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(file.Name, Encoding.UTF8));            Response.AddHeader("Content-Length", file.Length.ToString());            Response.AddHeader("Content-Transfer-Encoding", "binary");            Response.ContentType = "application/octet-stream";            Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");            Response.WriteFile(file.FullName);            Response.Flush();            HttpContext.Current.ApplicationInstance.CompleteRequest();

[解决办法]
1，测试的时候每次都打开一个新的浏览器窗口
2，你可以
Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(file.Name, Encoding.UTF8));

改成
Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(file.Name, Encoding.UTF8) + ".txt");

看看是不是把扩展名也编码了

编码的时候只编码文件名，不要包括扩展名