Asp.Net导出GridView数据到Excel

1、处理为excel格式的代码

///<summary>
        /// 导出为Excel
        ///</summary>
        ///<param name="control">控件</param>
        ///<param name="encoding">导出格式</param>
        ///<param name="filename">文件名</param>
publicstaticvoid ConvertToExcel(System.Web.UI.Control control, string encoding, string filename)
        {
        　　//设置文件名格式，防止中文文件名乱码
string FileName = System.Web.HttpUtility.UrlEncode(Encoding.UTF8.GetBytes(filename));
            System.Web.HttpContext.Current.Response.Clear();
            System.Web.HttpContext.Current.Response.Buffer =true;
            System.Web.HttpContext.Current.Response.Charset =""+ encoding +"";
            //下面这行很重要， attachment 参数表示作为附件下载，您可以改成 online在线打开
            //filename=FileFlow.xls 指定输出文件的名称，注意其扩展名和指定文件类型相符，可以为：.doc 　　 .xls 　　 .txt 　　.htm
            System.Web.HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename="+ FileName);
            System.Web.HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding(""+ encoding +"");
            //Response.ContentType指定文件类型 可以为application/ms-excel、application/ms-word、application/ms-txt、application/ms-html 或其他浏览器可直接支持文档
            System.Web.HttpContext.Current.Response.ContentType ="application/ms-excel";
            control.EnableViewState =false;
            //　定义一个输入流
            System.IO.StringWriter oStringWriter =new System.IO.StringWriter();
            System.Web.UI.HtmlTextWriter oHtmlTextWriter =new System.Web.UI.HtmlTextWriter(oStringWriter);

            control.RenderControl(oHtmlTextWriter);
            //this 表示输出本页，你也可以绑定datagrid,或其他支持obj.RenderControl()属性的控件
            System.Web.HttpContext.Current.Response.Write(oStringWriter.ToString());
            System.Web.HttpContext.Current.Response.End();
        }

2、调用代码

　　　　protectedvoid btnExcel_Click(object sender, EventArgs e)
        {
            string filename = String.Format("XXXX表-{0}月.xls", DateTime.Now.Month.ToString());
            ConvertToExcel(mygridview, "UTF-8", filename);
        }

        publicoverridevoid VerifyRenderingInServerForm(Control control)
        {
            //base.VerifyRenderingInServerForm(control);
        }

3、防止导入到excel后因格式变化而造成数据丢失（比如证件号码，导入Excel中该列会被excel以科学计数法表示，从而会丢掉部分数据），须在gridview的RowDataBound事件中添加如下代码处理

　　　　//设置导出单元格的格式，防止在excel中数据丢失
protectedvoid gvSettlement_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)  
            { 

                e.Row.Cells[0].Attributes.Add("style", "vnd.ms-excel.numberformat:@");
            } 

        }