.Net中导出Excel中身份证等数字串的解决方式

 public static void DataTableToExcel(System.Data.DataTable dtData, String FileName)    

{        

　　GridView dgExport = null;        

　   HttpContext curContext = HttpContext.Current;        

　　StringWriter strWriter = null;        

　　HtmlTextWriter htmlWriter = null;        

　　if (dtData != null)        

　　 {            

　　　　 HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8);

             curContext.Response.AddHeader("content-disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls");

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

            curContext.Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-7");

            curContext.Response.Charset = "GB2312";

            strWriter = new StringWriter();

            htmlWriter = new HtmlTextWriter(strWriter);  

           dgExport = new GridView();

            dgExport.RowDataBound += (GridViewFormat); //在GridView绑定数据时，将数据格式化

            dgExport.DataSource = dtData.DefaultView;

            dgExport.AllowPaging = false;

            dgExport.DataBind();

            dgExport.RenderControl(htmlWriter);

            curContext.Response.Write(strWriter.ToString());

            curContext.Response.End();  

       }

}

 protected static void GridViewFormat(object sender, GridViewRowEventArgs e)    

{        

　  　 //1）  文本：vnd.ms-excel.numberformat:@

        //2）  日期：vnd.ms-excel.numberformat:yyyy/mm/dd

        //3）  数字：vnd.ms-excel.numberformat:#,##0.00

        //4）  货币：vnd.ms-excel.numberformat:￥#,##0.00

        //5）  百分比：vnd.ms-excel.numberformat: #0.00%

        for (int i = 0; i < e.Row.Cells.Count; i++)

        {

            if (e.Row.RowType == DataControlRowType.DataRow)

　　　　{

                e.Row.Cells[i].Attributes.Add("style", "vnd.ms-excel.numberformat:@");

　　　　}

        }

    }