2、新建名为p_export_to_excel的存储过程，创建代码如下：

create proc p_export_to_excel

@sqlstr sysname,
--查询语句,该查询语句的查询结果就是写到Excel中的数据。
--如果查询语句中使用了order by ,请加上top 100 percent, 

@path nvarchar(1000),
--导出路径,路径必须要用双斜杠，如"c:\\aillo\\tt\\"格式，而不能用"c:\aillo\t\"

@fname nvarchar(250), --文件名，需包括文件的扩展名，如：123.xls

@sheetname varchar(250)='' --要创建的工作表名，默认为文件名

as

declare @err int,@src nvarchar(255),@desc nvarchar(255),@out int

declare @obj int,@constr nvarchar(1000),@sql varchar(8000),@fdlist varchar(8000)

--参数检测

if isnull(@fname,'')='' set @fname='temp.xls'

if isnull(@sheetname,'')='' set @sheetname=replace(@fname,'.','#')

--检查文件是否已经存在

if right(@path,1)<>'' set @path=@path+''

create table #tb(a bit,b bit,c bit)

set @sql=@path+@fname

insert into #tb exec master..xp_fileexist @sql

--数据库创建语句

set @sql=@path+@fname

if exists(select 1 from #tb where a=1)

set @constr='DRIVER={Microsoft Excel Driver (*.xls)};DSN='''';READONLY=FALSE'

+';CREATE_DB="'+@sql+'";DBQ='+@sql

else

set @constr='Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties="Excel 5.0;HDR=YES'

+';DATABASE='+@sql+'"'

--连接数据库

exec @err=sp_oacreate 'adodb.connection',@obj out

if @err<>0 goto lberr

exec @err=sp_oamethod @obj,'open',null,@constr

if @err<>0 goto lberr

--创建表的SQL

declare @tbname sysname

set @tbname='##tmp_'+convert(varchar(38),newid())

set @sql='select * into ['+@tbname+'] from('+@sqlstr+') a'

exec(@sql)

select @sql='',@fdlist=''

select @fdlist=@fdlist+','+a.name

,@sql=@sql+',['+a.name+'] '

+case when b.name in('char','nchar','varchar','nvarchar') then

'text('+cast(case when a.length>255 then 255 else a.length end as varchar)+')'

when b.name in('tynyint','int','bigint','tinyint') then 'int'

when b.name in('smalldatetime','datetime') then 'datetime'

when b.name in('money','smallmoney') then 'money'

else b.name end

FROM tempdb..syscolumns a left join tempdb..systypes b on a.xtype=b.xusertype

where b.name not in

('image','text','uniqueidentifier','sql_variant','ntext','varbinary','binary','timestamp')

and a.id=(select id from tempdb..sysobjects where name=@tbname)

select @sql='create table ['+@sheetname

+']('+substring(@sql,2,8000)+')'

,@fdlist=substring(@fdlist,2,8000)

exec @err=sp_oamethod @obj,'execute',@out out,@sql

if @err<>0 goto lberr

exec @err=sp_oadestroy @obj

--导入数据

set @sql='openrowset(''MICROSOFT.JET.OLEDB.4.0'',''Excel 5.0;HDR=YES

;DATABASE='+@path+@fname+''',['+@sheetname+'$])'

exec('insert into '+@sql+'('+@fdlist+') select '+@fdlist+' from ['+@tbname+']')

set @sql='drop table ['+@tbname+']'

exec(@sql)

return

lberr:

exec sp_oageterrorinfo 0,@src out,@desc out

lbexit:

select cast(@err as varbinary(4)) as 错误号

,@src as 错误源,@desc as 错误描述

select @sql,@constr,@fdlist

GO

二、在ASP.net程序代码（SQL_Export_To_Excel.aspx.cs）中调用存储过程：
      在设计界面中添加一个导出按钮，添加如下代码：

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class SQL_To_Excel : System.Web.UI.Page
{
    public SqlConnection con()
    {
        string constr = "server=localhost;uid=sa;pwd=123456;database=NorthWind";
        SqlConnection mycon = new SqlConnection(constr);
        return mycon;
    }
    protected void Page_Load(object sender, EventArgs e)
    {
      
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        SqlConnection connection = con();
        SqlCommand cmd = new SqlCommand("p_export_to_excel", connection);
        cmd.CommandType = CommandType.StoredProcedure;
        SqlParameter p1, p2, p3, p4;
        p1 = new SqlParameter("@sqlstr", "select * from Products");
        p2 = new SqlParameter("@path", "E:\\Media\\");
        p3 = new SqlParameter("@fname", "JackieAillo.xls");
        p4 = new SqlParameter("@sheetname", "AAA");
        cmd.Parameters.Add(p1);
        cmd.Parameters.Add(p2);
        cmd.Parameters.Add(p3);
        cmd.Parameters.Add(p4);
        try
        {
            connection.Open();
            cmd.ExecuteNonQuery();
            Response.Write("<script>alert('数据已成功导到Excel中！')</script>");
        }
        catch (Exception ex)
        {
            ex.ToString();
        }
        finally
        {
            connection.Close();
        }
    }
}