导出EXCEL按钮的问题

Question

我做了一个导出EXCEL的按钮，代码如下，有两个问题。1.导出的EXCEL是2003版的,用office2003打开是正常的，但是用office2010打开就乱码，直接在office2003复制黏贴到office2010的新建文档里面也是乱码,有没有办法解决，正常来说2003的文件在2010打开是没问题的。他的提示是写着“单元格数据太大”，考虑到有的用户可能只装2003或只装2007或只装2010，所以导出的文件要做到全兼容才行.2.导出的文字字体是Arial Unicode MS，这个有没有办法改，改成宋体之类，当然这个不是很关键，导出来后自己手动改也可以，关键是上面那个问题。后台代码：using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using System.Data.SqlClient;using System.Drawing;using System.IO;using System.Text;public partial class test : System.Web.UI.Page{  protected void Page_Load(object sender, EventArgs e)  {  }  protected void Button1_Click(object sender, EventArgs e)  {  Export("application/ms-excel", "bijiben.xls");  }  private void Export(string FileType, string FileName)  {  Response.Charset = "GB2312";  Response.ContentEncoding = System.Text.Encoding.UTF7;  Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString());  Response.ContentType = FileType;  this.EnableViewState = false;  StringWriter tw = new StringWriter();  HtmlTextWriter hw = new HtmlTextWriter(tw);  GridView1.RenderControl(hw);  Response.Write(tw.ToString());  Response.End();  }  public override void VerifyRenderingInServerForm(Control control)  {  }}