将GridView中的数据导出到Excel代码与注意事项

//gv:需要导出数据的GridView，filename:导出excel文件名
public void ExportToExcel(GridView gv, string filename)
    {
        string style = @"<style> .text { mso-number-format:\@; } </style> ";

        Response.ClearContent();
        HttpContext.Current.Response.Charset = "UTF8";
        HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.Default;//注意编码                
        Response.AddHeader("content-disposition", "attachment; filename=" + filename);
        Response.ContentType = "application/ms-excel";
        StringWriter sw = new StringWriter();
        HtmlTextWriter htw = new HtmlTextWriter(sw);
        gv.PageSize = Int16.MaxValue;
//导出之前一定要再次绑定数据源，不然导出无数据
        gv.DataSource = getGridViewData();
        gv.DataBind();
        gv.RenderControl(htw);
        // Style is added dynamically
        Response.Write(style);
        Response.Write(sw.ToString());
        Response.End();
    }
//必须加上这个函数，函数中没有任何内容只是重载一下，不然会报错：... type ‘GridView‘ must be placed inside a form tag with runat=server.
    public override void VerifyRenderingInServerForm(Control control)
    {
    }
//可以在每行数据绑定的时候设置数据格式

　　 protected void IBDetailGridView_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowIndex > -1)
        {
            e.Row.Cells[7].Attributes.Add("style", "vnd.ms-excel.numberformat:@");
            e.Row.Cells[8].Attributes.Add("style", "vnd.ms-excel.numberformat:@");           
        }
    }