导出excel乱码的问题

Question

我在导出的excel中其他的都是正常的只有列头部分是乱码，我应该如何处理呢？各位帮忙！
我是这样处理的：
   Response.Buffer = true;
            Response.Charset = "utf-8";
            Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode("Excel.xls", System.Text.Encoding.GetEncoding("GB2312")));
                   Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
            Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。 
            System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
            System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
            this.GridView1.RenderControl(oHtmlTextWriter);
            Response.Write("<meta   http-equiv=Content-Type   content=text/html;charset=GB2312>");
            Response.Output.Write(oStringWriter.ToString());
            Response.Flush();
            Response.End();

Answer 1

System.IO.FileInfo file = new System.IO.FileInfo(文件路径);
Response.Clear();
Response.AddHeader("Content-Disposition", "attachment;   filename=" + HttpUtility.UrlEncode(显示的文件名.xls));
Response.AddHeader("Content-Length", file.Length.ToString());
Response.ContentType = "application/octet-stream";
Response.WriteFile(file.FullName);
Response.Flush();
Response.Clear();
Response.End();这样试试呢