经测试,有可能是这个问题:

导出Excel的代码:

 

    private void ExportToExcel()
    {
        Response.Clear();
        System.Web.HttpContext curContext 
= System.Web.HttpContext.Current;
        Response.AddHeader(
"content-disposition""attachment;filename=Test.xls");
        
//Response.Charset = "UTF-8";//设置字符集
        
//curContext.Response.ContentEncoding = System.Text.Encoding.UTF8;//设置编码集
        Response.Charset = "utf-8";
        Response.ContentEncoding 
= System.Text.Encoding.GetEncoding("GB2312");
        
//Response.ContentType = "application/vnd.xls";
        Response.ContentType = "application/ms-excel";
        
//ms-excel
        System.IO.StringWriter stringWrite = new System.IO.StringWriter();
        System.Web.UI.HtmlTextWriter htmlWrite 
= new HtmlTextWriter(stringWrite);
        
//写到Excel的数据不用分页
      
        GridView1.RenderControl(htmlWrite);
        Response.Write(stringWrite.ToString());
//向客户端写数据
        Response.End();

        GridView1.AllowSorting 
= true;
        
//恢复分页       
    }

 如果将 Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");

设置成 UTF7则会出现题目中的问题 导致打开是乱码,改成GB2312就正常。

 

 

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