C#用文件流导出EXCEL的代码，有人有吗

[agai]

不用Excel.Application，太慢

[十八道胡同]

using System;   
using System.Collections.Generic;   
using System.Text;   
using System.Data;   
using System.Data.OleDb;   
using System.Data.SqlClient;   
using System.IO;   
using Microsoft.Office.Interop.Excel;   
namespace TestAccess   
{   
    class Program   
    {   
        static void Main(string[] args)   
        {   
  
            string strConnection = "Provider=Microsoft.ACE.OLEDB.12.0;";   
            strConnection += @"Data Source=C:\Documents and Settings\v-changl\My Documents\couse.xlsx;";   
            strConnection += "Extended Properties=\"Excel 12.0 Xml;HDR=YES\";";   
            OleDbConnection objConnection = new OleDbConnection(strConnection);   
            objConnection.Open();   
            OleDbDataAdapter myCommandd = new OleDbDataAdapter("select * from [Sheet1$]", objConnection);   
            DataSet ds = new DataSet();   
            myCommandd.Fill(ds, "[Sheet1$]");   
            System.Data.DataTable dt = ds.Tables["[Sheet1$]"];   
            Console.WriteLine(dt.Columns[0].ToString());   
            Console.WriteLine(dt.Columns[1].ToString());   
            DataRow drDisplay = dt.Rows[0];   
            int[] num = new int[dt.Columns.Count];   
            for (int j = 0; ; )   
            {   
                for (int i = 0; i < dt.Columns.Count; i++)   
                {   
  
                    if (drDisplay[i] is DBNull) ;   
                    else  
                        num[i] += Convert.ToInt32(drDisplay[i]);   
  
                }   
                if (++j >= dt.Rows.Count) break;   
                drDisplay = dt.Rows[j];   
            }   
            objConnection.Close();   
            object MissingValue = Type.Missing;   
            Microsoft.Office.Interop.Excel.Application app = new Application();   
            Microsoft.Office.Interop.Excel.Workbook wbook = app.Workbooks.Open(@"C:\Documents and Settings\v-changl\My Documents\couse.xlsx", MissingValue,   
MissingValue, MissingValue, MissingValue,   
MissingValue, MissingValue, MissingValue,   
MissingValue, MissingValue, MissingValue,   
MissingValue, MissingValue, MissingValue,   
MissingValue);   
            Microsoft.Office.Interop.Excel.Worksheet wsheet = wbook.ActiveSheet as Microsoft.Office.Interop.Excel.Worksheet;   
            for (int i = 0; i < dt.Columns.Count; i++)   
            {   
                //注意下面是i+1,,excel小标默认从1开始   
                wsheet.Cells[dt.Rows.Count + 2, i + 1] = num[i].ToString();   
            }   
  
            wbook.Save();   
            wbook.Close(true, null, null);   
            System.Runtime.InteropServices.Marshal.ReleaseComObject(wsheet);   
            System.Runtime.InteropServices.Marshal.ReleaseComObject(wbook);   
            System.Runtime.InteropServices.Marshal.ReleaseComObject(app);   
            wsheet = null;   
            wbook = null;   
            app = null;   
            GC.Collect();   
        }   
    }   
}  


本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/LCL_data/archive/2009/05/06/4154784.aspx

哦，我用了，等好的办法

[xiangchengboy]

 /// <summary>
    /// 导出Excel
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void Button1_Click(object sender, EventArgs e)
    {
        Export("application/ms-excel", "Employee information.xls");
    }
    /// <summary>
    /// 定义导出Excel的函数
    /// </summary>
    /// <param name="FileType"></param>
    /// <param name="FileName"></param>
    private void Export(string FileType, string FileName)
    {
        Response.Charset = "GB2312";
        Response.ContentEncoding = System.Text.Encoding.UTF8;
        Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString());
        Response.ContentType = FileType;
        this.EnableViewState = false;
        StringWriter tw = new StringWriter();
        HtmlTextWriter hw = new HtmlTextWriter(tw);
        GridView1.RenderControl(hw);
        Response.Write(tw.ToString());
        Response.End();
    }
    /// <summary>
    /// 此方法必重写，否则会出错
    /// </summary>
    /// <param name="control"></param>
    public override void VerifyRenderingInServerForm(Control control)
    {
    }