如何用excel做报表的实例asp.net

 在添加一个输出的aspx页面：Output.aspx，在页面上放置一个label，来显示input框架传递过来的参数，在cs文件中添加代码如下：

    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 Excel = Microsoft.Office.Interop.Excel;
using System.Reflection;
using System.Data.OleDb;
using System.IO;
using System.Diagnostics;

public partial class Output : System.Web.UI.Page
{
    OleDbConnection Olecn;
    OleDbCommand OleCamm;
    DataTable DT = new DataTable();

    private string StrTime = "";
    protected void Page_Load(object sender, EventArgs e)
    {
        //接收Input框架传递的参数
        if (!IsPostBack)
        {
            StrTime = Request.QueryString["Time"];
            if (StrTime != null)
                Label1.Text = "时间：" + StrTime;
        }

        //在页面加载的时候将数据取出
        if (ConnectionDataBase())
        {
            OleCamm = new OleDbCommand();
            OleCamm.Connection = Olecn;
            Olecn.Open();
            OleCamm.CommandText = "select * from pl where date = " + "'" + StrTime + "'";
            OleDbDataAdapter OleDAdp = new OleDbDataAdapter(OleCamm);
            OleDAdp.Fill(DT);
            Olecn.Close();
        }
        Exceltest();
    }
   
    /**//// <summary>
    /// 连接数据库
    /// </summary>
    /// <returns></returns>
    private bool ConnectionDataBase()
    {
        try
        {
            string DataSource = Server.MapPath("~") + "\\App_Data\\Excel.mdb";
            Olecn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+DataSource);
            Olecn.Open();
        }
        catch (Exception e1)
        {
            Response.Write(e1.Message);
            return false;
        }
        finally
        {
            Olecn.Close();
        }
        return true;
    }

    /**//// <summary>
    /// 对Excel的操作
    /// </summary>
    private void Exceltest()

    {
        //在创建Excel Application前先将已经打开的Excel资源释放掉
        EndExcelProcesse();

        //指定模板文件
        FileInfo mode = new FileInfo(Server.MapPath("~") + "\\yydw.xls");

        //打开复制后的文件X
        object missing = Missing.Value;
        Excel.Application myExcel = new Excel.Application();

        //打开模板文件
        myExcel.Application.Workbooks.Open(mode.FullName, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing);

        //选中有数据的Cells
        Excel.Workbook myBook = myExcel.Workbooks[1];
        Excel.Worksheet mySheet = (Excel.Worksheet)myBook.Worksheets[1];
        Excel.Range r = mySheet.get_Range(mySheet.Cells[1, 1], mySheet.Cells[DT.Rows.Count + 2, DT.Columns.Count - 3]);
        r.Select();

        //不单独显示Excel，最后在IE中显示
        myExcel.Visible = false;

        //第一行为报表的标题
        myExcel.Cells[1, 1] = "用模板导出的报表";

        //逐行写入数据，数组中第一行为报表的列标题
        for (int i = 0; i < DT.Columns.Count - 3; i++)
        {
            myExcel.Cells[2, 1 + i] = DT.Columns[i].Caption; ;
        }
       
        //为报表填充数据并设置显示上下标格式
        for (int i = 0; i < DT.Rows.Count; i++)
        {
            for (int j = 0; j < DT.Columns.Count - 4; j++)
            {
                myExcel.Cells[3 + i, 1 + j] = DT.Rows[i][j];
            }
            string a = DT.Rows[i][DT.Columns.Count-4].ToString();
            string b = DT.Rows[i][DT.Columns.Count-3].ToString();
            string c = DT.Rows[i][DT.Columns.Count -2].ToString();
            myExcel.Cells[3 + i, DT.Columns.Count - 3] = a + b + c;

            //控制输出样式为下标
            mySheet.get_Range(mySheet.Cells[i + 3, DT.Columns.Count - 3], mySheet.Cells[i + 3, DT.Columns.Count - 3]).get_Characters(a.Length + 1, b.Length).Font.Subscript = true;

            //控制输出样式为上标
            mySheet.get_Range(mySheet.Cells[i + 3, DT.Columns.Count - 3], mySheet.Cells[i + 3, DT.Columns.Count - 3]).get_Characters(a.Length + b.Length + 1, c.Length).Font.Superscript = true;
            mySheet.Columns.AutoFit();
        }

        //在当前目录下指定一个临时文件
        string FileName = Server.MapPath("~") + "\\Temp.xls";
        if (File.Exists(FileName))
        {
            File.Delete(FileName);
        }
        myExcel.Save(FileName);
        mySheet.Cells.Clear() ;
        //设置不出现保存提示框
        myBook.Saved = true;
        myExcel.Application.Workbooks.Close();

        //将Excel文件嵌入在IE里面，也可以在aspx页面用
        //<iframe id="myExcelHtml" src ="E:\\练习\\excell\\WebSite2\\Temp.xls" width="100%" height="100%" runat ="server"></iframe>
        //标签来嵌入
        Response.ClearContent();
        Response.ClearHeaders();
        Response.ContentType = "application/vnd.ms-excel";
        Response.AddHeader("Content-Disposition", "inline;filename='我的文件'");
        Response.WriteFile(FileName);
        Response.Flush();
        Response.Close();
    }

    /**//// <summary>
    /// 当报表数据更新时,先强制结束前一个报表的数据源
    /// 这种方法会同时杀死掉用户的excel进程
    /// </summary>
    protected void EndExcelProcesse()
    {
        try
        {   
            Process[] myProcesses = Process.GetProcessesByName("excel");
            foreach (Process instance in myProcesses)
            {
                instance.Kill();   //强制终止   
            }
        }
        catch { }
        //在网上查的用下面的方法结束Excel进程表较好,但一直没有效果
        //try
        //{
        //    System.Runtime.InteropServices.Marshal.ReleaseComObject(r);
        //    System.Runtime.InteropServices.Marshal.ReleaseComObject(mySheet);
        //    System.Runtime.InteropServices.Marshal.ReleaseComObject(myBook);
        //    System.Runtime.InteropServices.Marshal.ReleaseComObject(myExcel);
           
        //    myBook = null;
        //    mySheet = null;
        //    myExcel = null;
        //    r = null;
        //    GC.Collect();
        //}
        //catch { }
    }

   
}