C# GridView导出excel，字段值前边带0的，导出后不显示0的解决方法

        Response.Clear();

        Response.AddHeader("content-disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(DateTime.Now.ToString("yyyy-MM-dd") + ".xls");

        Response.Charset = "utf-8";

        Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8");

        Response.ContentType = "application/vnd.ms-excel";

        string strStyle = "<style>td{mso-number-format:\"\\@\";}</style>";

        System.IO.StringWriter stringWrite = new System.IO.StringWriter();

        stringWrite.WriteLine(strStyle);

        System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);



        P_GridView.RenderControl(htmlWrite);



        Response.Write(stringWrite.ToString());

        Response.End();*/

        /////////////////////

        //*********************重新设置

        P_GridView.AllowPaging = false;

        P_GridView.AllowSorting = false;

        this.P_GridView.PageSize = 65000;//最大为65535

        dataBind();

        P_GridView.RenderControl(htmlWrite);

        Response.Write(stringWrite.ToString());

        Response.End();

        

        this.P_GridView.PageSize = 10;

        dataBind();

最重要的就是下面两行

string strStyle = "<style>td{"\\@\";}</style>";//写入方式

stringWrite.WriteLine(strStyle);//使用定义的strStyle方式写入