格式化GridView并导出Excel

 1        /**//// <summary>
 2        /// 导出成为Excel
 3        /// </summary>
 4        /// <param name="exportTargetGridView">目标GridView</param>
 5        /// <param name="visibleNum">隐藏的列数</param>
 6        /// <param name="content">说明内容</param>
 7        public static void ExportExcel(GridView exportTargetGridView, int visibleNum, string content)
 8        {
 9            HttpContext.Current.Response.ClearContent();
10
11            HttpContext.Current.Response.Charset = "GB2312";
12
13            HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF7;
14
15            HttpContext.Current.Response.AddHeader("content-disposition", "attachment; filename=MyExcelFile.xls");
16
17            HttpContext.Current.Response.ContentType = "application/excel";
18
19            StringWriter sw = new StringWriter();
20
21            HtmlTextWriter htw = new HtmlTextWriter(sw);
22
23            for (int i = 0; i < visibleNum; i++)
24            {
25                exportTargetGridView.Columns[exportTargetGridView.Columns.Count - (i + 1)].Visible = false;
26            }
27
28            exportTargetGridView.RenderControl(htw);
29
30            sw.WriteLine(content + exportTargetGridView.Rows.Count.ToString());
31
32            HttpContext.Current.Response.Write(sw.ToString());
33
34            HttpContext.Current.Response.End();
35        }

同时，还要重写

        public override void VerifyRenderingInServerForm(Control control)
        {

        }

如果含有类似于身份证这样的数据，在导出成为Excel后将变成科学计数法的形式显示，所以可以通过以下方式进行转换，该段代码应写在RowDataBound事件中

            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                e.Row.Cells[4].Attributes.Add("style", "vnd.ms-excel.numberformat:@");
            }