ASP.NET通过流方式导出EXCEL并且单元格换行

关键是EXCEL单元格换行，折腾了好久，终于出来了，呵呵，做个记录

 

 .cs源代码

代码

using  System;
using  System.Collections.Generic;
using  System.Linq;
using  System.Web;
using  System.Web.UI;
using  System.Web.UI.WebControls;

namespace  ExportExcel
{
     public   partial   class  _Default : System.Web.UI.Page
    {
         protected   void  Page_Load( object  sender, EventArgs e)
        {
             if  ( ! IsPostBack)
            {
                 this .GridView1.DataSource  =  CreateDataSource();
                 this .GridView1.DataBind();
            }
        }

         public   override   void  VerifyRenderingInServerForm(Control control)
        { }

         protected   void  Button1_Click( object  sender, EventArgs e)
        {
             // 设置文件名
             string  fileName  =  DateTime.Now.ToString( " yyyyMMddHHmmss " );

             // HTTP请求内容
            System.Web.HttpContext curContext  =  System.Web.HttpContext.Current;

             //  输出文件流
            System.IO.StringWriter strWriter  =   null ;

             // 服务端控件输出流
            System.Web.UI.HtmlTextWriter htmlWriter  =   null ;

             //  清空当前 Response
            HttpContext.Current.Response.Clear();

             // 设置缓冲方式输出
            HttpContext.Current.Response.Buffer  =   true ;

             // 添加HTTP标头到输出流
            HttpContext.Current.Response.AddHeader( " content-disposition " ,  string .Format( " attachment; filename={0}.xls " , fileName));
            curContext.Response.ContentType  =   " application/vnd.ms-excel " ;  // 设置输出文件类型为xls文件

             /* *如果要输出doc文件,请用下面这段代码* */
             // HttpContext.Current.Response.AddHeader("content-disposition", string.Format("attachment; filename={0}.doc", fileName));
             // curContext.Response.ContentType = "application/ms-word";  // 设置输出文件类型为word文件          

             // 设置编码方式
            curContext.Response.ContentEncoding  =  System.Text.Encoding.GetEncoding( " GB2312 " );
            curContext.Response.Charset  =   "" ;

             //  导出文件 
            strWriter  =   new  System.IO.StringWriter();
            htmlWriter  =   new  System.Web.UI.HtmlTextWriter(strWriter);

            htmlWriter.Write( " 测试标题1 " );

             //  返回客户端 
            GridView1.RenderControl(htmlWriter);

             // 设置换行  <br/>是html的换行样式替换成<br style='mso-data-placement:same-cell;'/> EXCEL换行
            curContext.Response.Write(strWriter.ToString().Replace( " <br/> " ,  " <br style='mso-data-placement:same-cell;'/>  " ));

            curContext.Response.End();
        }

        System.Data.DataView CreateDataSource()
        {
            System.Data.DataTable dt  =   new  System.Data.DataTable();
            System.Data.DataRow dr;
            dt.Columns.Add( new  System.Data.DataColumn( " 测试1 " ));
            dt.Columns.Add( new  System.Data.DataColumn( " 测试2 " ));
            dt.Columns.Add( new  System.Data.DataColumn( " 测试3 " ));
            dt.Columns.Add( new  System.Data.DataColumn( " 测试4 " ));
            dt.Columns.Add( new  System.Data.DataColumn( " 测试5 " ));
            dt.Columns.Add( new  System.Data.DataColumn( " 测试6 " ));

             for  ( int  i  =   0 ; i  <   5 ; i ++ )
            {
                System.Random rd  =   new  System.Random(Environment.TickCount  *  i); ;
                dr  =  dt.NewRow();
                dr[ 0 ]  =   " 编号 "   +  i.ToString();
                dr[ 1 ]  =   " 换行测试： "   +  i.ToString()  +   " <br/> "   +   " 第二行开始 "   +  i.ToString()  +   " <br/> "   +   " 第三行开始 "   +  i.ToString()  +   " <br/> "   +   " 第四行开始 "   +  i.ToString()  +   " <br/> "   +   " 第五行开始 "   +  i.ToString();
                dr[ 2 ]  =   " 测试: "   +  i.ToString();
                dr[ 3 ]  =   " 测试: "   +  i.ToString();
                dr[ 4 ]  =   " 测试: "   +  i.ToString();
                dr[ 5 ]  =   " 测试: "   +  i.ToString();
                dt.Rows.Add(dr);
            }

            System.Data.DataView dv  =   new  System.Data.DataView(dt);
             return  dv;
        }
    }
}

 

 

.aspx源

代码

<% @ Page Language = " C# "  AutoEventWireup = " true "  CodeBehind = " Default.aspx.cs "  Inherits = " ExportExcel._Default "   %>

<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >

< html  xmlns ="http://www.w3.org/1999/xhtml"   >
< head  runat ="server" >
     < title ></ title >
</ head >
< body >
     < form  id ="form1"  runat ="server" >
     < div >
     < asp:GridView  ID ="GridView1"  runat ="server"  AutoGenerateColumns ="false"   >   
     < Columns >
                 < asp:BoundField  HtmlEncode ="false"  DataField ="测试1"  HeaderText ="测试字段"   />
                 < asp:BoundField  HtmlEncode ="false"  DataField ="测试2"  HeaderText ="测试字段"   />
                 < asp:BoundField  HtmlEncode ="false"  DataField ="测试3"  HeaderText ="测试字段"   />
                 < asp:BoundField  HtmlEncode ="false"  DataField ="测试4"  HeaderText ="测试字段"   />
                 < asp:BoundField  HtmlEncode ="false"  DataField ="测试5"  HeaderText ="测试字段"   />
                 < asp:BoundField  HtmlEncode ="false"  DataField ="测试6"  HeaderText ="测试字段"   />
             </ Columns >          
         </ asp:GridView >         
         < asp:Button  ID ="Button1"  runat ="server"  onclick ="Button1_Click"  Text ="导出"   />
         < br  />
     </ div >
     </ form >
</ body >
</ html >

 

用VS2008写的DEMO:/Files/tqlin/ExportExcel.rar