GridView导出Excel

一、首先设置aspx页面EnableEventValidation="false"如下：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="FieldObjSearch.aspx.cs"
    Inherits="Unitop.JGXT2010.DAS.FieldObjSearch" EnableEventValidation="false" %>

二、页面按钮

<asp:Button ID="btnExport" runat="server" Text="" OnClick="btnExport_Click" />

三、后台关键代码

//导出到Excel按钮
        protected void btnExport_Click(object sender, EventArgs e)
        {
            Export("application/ms-excel", "字段数据.xls");
        }
        //导出到Excel
        private void Export(string FileType, string FileName)
        {
            //以下三行可选，如果没有的话导出的只是当前页数据，没有其他页数据 
            //gvFieldData.AllowPaging = false;
            //gvFieldData.AllowSorting = false;
            //GetFieldInfo(false, "obj_name"); //这里是你绑定gridview的方法

            gvFieldData.Columns[7].Visible = false;  //导出时隐藏操作列
            gvFieldData.BottomPagerRow.Visible = false;  //隐藏分页行
            //string style = @"<style> .text { mso-number-format:\@; } </script> ";
            Response.Clear();
            Response.Buffer = true;
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312"); // 中文 
            Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString());
            Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。 
            //此句可解决中文导出后成为韩文的问题，当然也可以解决乱码的问题Response.Write("<meta http-equiv=Content-Type content=\"text/html; charset=GB2312\">");
            System.IO.StringWriter oStringWriter = new System.IO.StringWriter();
            System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
            this.gvFieldData.RenderControl(oHtmlTextWriter);
            //Response.Write(style);
            Response.Output.Write(oStringWriter.ToString());
            Response.Flush();
            Response.End();

        }

                //这个方法是配合导出Excel功能，内容不用写       
public override void VerifyRenderingInServerForm(Control control)
        {
        }

四、注

/*
         * 如果按钮放在UpdatePanel中则要为UpdatePanel添加
        <Triggers>
            <asp:PostBackTrigger ControlID="btnExport" />
        </Triggers>
         */

五、特别提示
数据如：0011，保持原样导出则在GridView相应的列内容前加 (即空格即可)
如：

<asp:TemplateField HeaderText="序列号" SortExpression="bm"  HeaderStyle-CssClass="headerCss">
    <ItemTemplate>
        &nbsp;<%#StringOP.GetRationLenContent(Eval("bm"), 10)%>
    </ItemTemplate>
</asp:TemplateField>