ASp.net操作Excel分页导出数据

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引用：通过Com 引用 Microsoft Excel 5.0 对象程序库，引用后 bin 文件夹中会出现 Interop.Excel.dll ，Microsoft.Vbe.Interop.dll ， Office.dll 三个文件。
//=====================ExcelHelper（套用模板输出Excel，并对数据进行分页）==============
using System;
using System.IO;
using System.Data;
using System.Reflection;
using System.Diagnostics;
using cfg = System.Configuration;
using Excel;
namespace ExcelHelper
{

    ///   <summary>
    /// 功能说明：套用模板输出Excel，并对数据进行分页
    ///   </summary>
    public class ExcelHelper
    {
        protected string templetFile = null;
        protected string outputFile = null;
        protected object missing = Missing.Value;
        ///   <summary>
        /// 构造函数，需指定模板文件和输出文件完整路径
        ///   </summary>
        ///   <param name="templetFilePath"> Excel模板文件路径 </param>
        ///   <param name="outputFilePath"> 输出Excel文件路径 </param>
        public ExcelHelper(string templetFilePath, string outputFilePath)
        {
            if (templetFilePath == null)
                throw new Exception(" Excel模板文件路径不能为空！ ");
            if (outputFilePath == null)
                throw new Exception(" 输出Excel文件路径不能为空！ ");
            if (!File.Exists(templetFilePath))
                throw new Exception(" 指定路径的Excel模板文件不存在！ ");
            this.templetFile = templetFilePath;
            this.outputFile = outputFilePath;
        }
        /**/
        ///   <summary>
        /// 将DataTable数据写入Excel文件（套用模板并分页）
        ///   </summary>
        ///   <param name="dt"> DataTable </param>
        ///   <param name="rows"> 每个WorkSheet写入多少行数据 </param>
        ///   <param name="top"> Excel中行索引 </param>
        ///   <param name="left"> Excel中列索引 </param>
        ///   <param name="sheetPrefixName"> WorkSheet前缀名，比如：前缀名为“Sheet”，那么WorkSheet名称依次为“Sheet-1，Sheet-2” </param>
        public void DataTableToExcel(System.Data.DataTable dt, int rows, int top, int left, string sheetPrefixName)
        {
            int rowCount = dt.Rows.Count;         // 源DataTable行数
            int colCount = dt.Columns.Count;     // 源DataTable列数
            int sheetCount = this.GetSheetCount(rowCount, rows);     // WorkSheet个数
            DateTime beforeTime;
            DateTime afterTime;
            if (sheetPrefixName == null || sheetPrefixName.Trim() == "")
                sheetPrefixName = " Sheet ";
            // 创建一个Application对象并使其可见
            beforeTime = DateTime.Now;
            Excel.Application app = new Excel.ApplicationClass();
            app.Visible = true;
            afterTime = DateTime.Now;
            // 打开模板文件，得到WorkBook对象（网上都是13个参数，现在变成14个参数了）
            Excel.Workbook workBook = app.Workbooks.Open(templetFile, missing, missing, missing, missing, missing,
                               missing, missing, missing, missing, missing, missing, missing, missing, missing);
            // 得到WorkSheet对象
            Excel.Worksheet workSheet = (Excel.Worksheet)workBook.Sheets.get_Item(1);
            // 复制sheetCount-1个WorkSheet对象
            for (int i = 1; i < sheetCount; i++)
            {
                ((Excel.Worksheet)workBook.Worksheets.get_Item(i)).Copy(missing, workBook.Worksheets);
            }

            for (int i = 1; i <= sheetCount; i++)
            {
                int startRow = (i - 1) * rows;         // 记录起始行索引
                int endRow = i * rows;             // 记录结束行索引
                // 若是最后一个WorkSheet，那么记录结束行索引为源DataTable行数
                if (i == sheetCount)
                    endRow = rowCount;
                // 获取要写入数据的WorkSheet对象，并重命名
                Excel.Worksheet sheet = (Excel.Worksheet)workBook.Worksheets.get_Item(i);
                sheet.Name = sheetPrefixName + " - " + i.ToString();
                // 将dt中的数据写入WorkSheet
                for (int j = 0; j < endRow - startRow; j++)
                {
                    for (int k = 0; k < colCount; k++)
                    {
                        sheet.Cells[top + j, left + k] = dt.Rows[startRow + j][k].ToString();
                    }
                }
                //// ====================写文本框数据（有错误注释掉了）=============
                //Excel.TextBox txtAuthor = (Excel.TextBox)sheet.TextBoxes(" txtAuthor ");
                //Excel.TextBox txtDate = (Excel.TextBox)sheet.TextBoxes(" txtDate ");
                //Excel.TextBox txtVersion = (Excel.TextBox)sheet.TextBoxes(" txtVersion ");
                //txtAuthor.Text = " KLY.NET的Blog ";
                //txtDate.Text = DateTime.Now.ToShortDateString();
                //txtVersion.Text = " 1.0.0.0 ";

                sheet.Cells[rows + 1, left + 1] = "总计：10000";
                sheet.Cells[rows + 1, left + 5] = "编码：10000";
            }

            // 输出Excel文件并退出
            try
            {
                //（网上是11个参数，现在是12个参数）
                workBook.SaveAs(outputFile, missing, missing, missing, missing, missing, Excel.XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing, missing);
                workBook.Close(null, null, null);
                app.Workbooks.Close();
                app.Application.Quit();
                app.Quit();
                System.Runtime.InteropServices.Marshal.ReleaseComObject(workSheet);
                System.Runtime.InteropServices.Marshal.ReleaseComObject(workBook);
                System.Runtime.InteropServices.Marshal.ReleaseComObject(app);
                workSheet = null;
                workBook = null;
                app = null;
                GC.Collect();
            }
            catch (Exception e)
            {
                throw e;
            }
            finally
            {
                Process[] myProcesses;
                DateTime startTime;
                myProcesses = Process.GetProcessesByName(" Excel ");
                // 得不到Excel进程ID，暂时只能判断进程启动时间
                foreach (Process myProcess in myProcesses)
                {
                    startTime = myProcess.StartTime;
                    if (startTime > beforeTime && startTime < afterTime)
                    {
                        myProcess.Kill();
                    }
                }
            }
        }

        /**/
        ///   <summary>
        /// 获取WorkSheet数量
        ///   </summary>
        ///   <param name="rowCount"> 记录总行数 </param>
        ///   <param name="rows"> 每WorkSheet行数 </param>
        private int GetSheetCount(int rowCount, int rows)
        {
            int n = rowCount % rows;         // 余数
            if (n == 0)
                return rowCount / rows;
            else
                return Convert.ToInt32(rowCount / rows) + 1;
        }
    }
}

使用示例：
public partial class _Default : System.Web.UI.Page
{

    ExcelHelper.ExcelHelper excel =null;
    protected void Page_Load(object sender, EventArgs e)
    {
        excel = new ExcelHelper.ExcelHelper(Server.MapPath("tempt/BJStock.xls"), Server.MapPath("ExcelFile/test.xls"));
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        excel.DataTableToExcel(DbHelperSQL.DbHelperSQL.GetDataTable("select * from excel"), 2, 1, 1, "Sheet");
        Response.Redirect("ExcelFile/test.xls");
    }
}