DataGrid输出到Excel并进行格式化处理

Posted on 2004-10-17 14:57 小二哥阅读(489) 评论(0) 编辑收藏举报

在我们把DataGrid上的数据导入到Excel的时候，如果遇到比较长的数字字符串，比如身份证号码，就会在Excel里当成数字看待，并转换成科学计数法的格式，造成数据的丢失，下面这个方法就解决了这个问题，并示例如何进行其它的格式化。

OutPutExcel.aspx

<%@ Page language="c#" Codebehind="OutPutExcel.aspx.cs" AutoEventWireup="false" Inherits="Mytest.OutputExcel.OutPutExcel" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >

<HTML>

<HEAD>

<title>OutPutExcel</title>

</HEAD>

<asp:DataGrid id="DataGrid1" style="Z-INDEX: 101; LEFT: 152px; POSITION: absolute; TOP: 40px"

runat="server"></asp:DataGrid>

<asp:Button id="Button1" style="Z-INDEX: 102; LEFT: 24px; POSITION: absolute; TOP: 48px" runat="server"

Text="输出到Excel"></asp:Button></FONT>

</form>

</body>

</HTML>

OutPutExcel.aspx.cs:

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace Mytest.OutputExcel
{
    /**//// <summary>
    /// OutPutExcel 的摘要说明。
    /// </summary>
    public class OutPutExcel : System.Web.UI.Page
    {
        protected System.Web.UI.WebControls.DataGrid DataGrid1;
        protected System.Web.UI.WebControls.Button Button1;

        private void Page_Load(object sender, System.EventArgs e)
        {
            // 在此处放置用户代码以初始化页面
            DataGrid1.DataSource=CreateDataSource();
            DataGrid1.DataBind();
        }
   /**//// <summary>
   ///
   /// </summary>
   /// <returns></returns>
        ICollection CreateDataSource()
        {

            DataTable dt = new DataTable();
            DataRow dr;
            dt.Columns.Add(new DataColumn("身份证号码", typeof(string)));
            dt.Columns.Add(new DataColumn("图书单价",typeof(decimal)));
            dt.Columns.Add(new DataColumn("购买数量",typeof(Int32)));
            dt.Columns.Add(new DataColumn("总价格",typeof(decimal)));

            for (int i = 0; i < 30; i++)
            {
                dr = dt.NewRow();
                dr[0] = "123456789123456789";
                dr[1] = 100 * i /3.0;
                dr[2] = i + 5;
                dr[3] = (decimal)dr[1] * (Int32)dr[2];
                dt.Rows.Add(dr);
            }
            DataView dv = new DataView(dt);
            return dv;
        }

        Web 窗体设计器生成的代码

        private void DataGrid1_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
        {
            if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
            {
                e.Item.Cells[0].Attributes.Add("style","vnd.ms-excel.numberformat:@");
                e.Item.Cells[3].Attributes.Add("style","vnd.ms-excel.numberformat:￥#,###.00");
            }
        }

        private void Button1_Click(object sender, System.EventArgs e)
        {
            Response.Clear();
            Response.Buffer= true;
            Response.Charset="GB2312";
            Response.AppendHeader("Content-Disposition","attachment;filename=FileName.xls");
            Response.ContentEncoding=System.Text.Encoding.GetEncoding("GB2312");//设置输出流为简体中文
            Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。
            this.EnableViewState = false;
            System.Globalization.CultureInfo myCItrad = new System.Globalization.CultureInfo("ZH-CN",true);
            System.IO.StringWriter oStringWriter = new System.IO.StringWriter(myCItrad);
            System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
            this.DataGrid1.RenderControl(oHtmlTextWriter);
            Response.Write(oStringWriter.ToString());
            Response.End();

        }

    }
}

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DataGrid输出到Excel并进行格式化处理