解决导出电子表格 当数字过多

protected void ImageButton2_Click(object sender, ImageClickEventArgs e)
{
if (sgv1.Rows.Count == 0)
{
Response.Write("<mce:script type="text/javascript"><!--
alert('数据库为空！')
// --></mce:script>");
}
else
{
ObjectDataSource1.SelectParameters.Clear();
ObjectDataSource1.SelectMethod = "get1";
ObjectDataSource1.TypeName = "excel";
ObjectDataSource1.DataBind();
sgv1.Columns.Clear();
sgv1.AutoGenerateColumns = true;
sgv1.AllowPaging = false;
sgv1.RowDataBound += new GridViewRowEventHandler(sgv1_RowDataBound);
sgv1.DataBind();
daochu();

}
}

protected void sgv1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
e.Row.Cells[15].Attributes.Add("class", "text");
e.Row.Cells[1].Attributes.Add("class", "text");
}
}

public void daochu()
{
string style = @"<style> .text { mso-number-format:/@; } </script> ";
Response.ClearContent();
HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.Default;
Response.AddHeader("content-disposition", "attachment;filename=hyjjb.xls");
Response.ContentType = "application/vnd.xls";
System.IO.StringWriter stringWrite = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
sgv1.RenderControl(htmlWrite);
Response.Write(style);
Response.Write(stringWrite.ToString());
Response.End();

}