EXCEL:将多个EXCEL文件汇总到一个EXCEL文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Word = Microsoft.Office.Interop.Word;
using System.Threading;
using office = Microsoft.Office.Core;
using System.Reflection;
using System.IO;
using System.Text.RegularExpressions;
using System.Text;
using System.Data;
using System.Data.OleDb;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{

BindListBox();
txtSavePath.Text = Server.MapPath("~/Target.xls");//初始化文件保存路径
}
}

protected void btnRead_Click(object sender, EventArgs e)
{
object missing = System.Reflection.Missing.Value;//定义object缺省值
string[] P_str_Names = new string[ListBox1.Items.Count];//存储所有选择的Excel文件名
for (int i = 0; i < ListBox1.Items.Count; i++)
{
P_str_Names[i] = ListBox1.Items[i].Value;
}
string P_str_Name = "";//存储遍历到的Excel文件名
List<string> P_list_SheetNames = new List<string>();//实例化泛型集合对象，用来存储工作表名称
Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();//实例化Excel对象
//打开指定的Excel文件
Microsoft.Office.Interop.Excel.Workbook workbook = excel.Application.Workbooks.Open(txtSavePath.Text, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing);
Microsoft.Office.Interop.Excel.Worksheet newWorksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets.Add(missing, missing, missing, missing);//创建新工作表
for (int i = 0; i < P_str_Names.Length; i++)//遍历所有选择的Excel文件名
{
P_str_Name = P_str_Names[i];//记录遍历到的Excel文件名
//指定要复制的工作簿
Microsoft.Office.Interop.Excel.Workbook Tempworkbook = excel.Application.Workbooks.Open(P_str_Name, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing);
P_list_SheetNames = GetSheetName(P_str_Name);//获取Excel文件中的所有工作表名
for (int j = 0; j < P_list_SheetNames.Count; j++)//遍历所有工作表
{
//指定要复制的工作表
Microsoft.Office.Interop.Excel.Worksheet TempWorksheet = (Microsoft.Office.Interop.Excel.Worksheet)Tempworkbook.Sheets[P_list_SheetNames[j]];//创建新工作表
TempWorksheet.Copy(missing, newWorksheet);//将工作表内容复制到目标工作表中
}
Tempworkbook.Close(false, missing, missing);//关闭临时工作簿
}
workbook.Save();//保存目标工作簿
workbook.Close(false, missing, missing);//关闭目标工作簿
Response.Write("<script>alert('已经将所有选择的Excel工作表汇总到了一个Excel工作表中！');</script>");
CloseProcess("EXCEL");//关闭所有Excel进程
}

protected void btnBrowse_Click(object sender, EventArgs e)
{
System.Diagnostics.Process.Start(txtSavePath.Text);//打开汇总后的Excel文件
}

private void BindListBox()
{
ListBox1.Items.Clear();
string path = Server.MapPath("~/File");
string[] files = System.IO.Directory.GetFiles(path);
foreach (string f in files)
{
string fileName = System.IO.Path.GetFileName(f);
ListItem li = new ListItem(fileName,f);
ListBox1.Items.Add(li);
}
}

private List<string> GetSheetName(string P_str_Excel)//获取所有工作表名称
{
List<string> P_list_SheetName = new List<string>();//实例化泛型集合对象
//连接Excel数据库
OleDbConnection olecon = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + P_str_Excel + ";Extended Properties=Excel 8.0");
olecon.Open();//打开数据库连接
System.Data.DataTable DTable = olecon.GetSchema("Tables");//实例化表对象
DataTableReader DTReader = new DataTableReader(DTable);//实例化表读取对象
while (DTReader.Read())//循环读取
{
string P_str_Name = DTReader["Table_Name"].ToString().Replace('$', ' ').Trim();//记录工作表名称
if (!P_list_SheetName.Contains(P_str_Name))//判断泛型集合中是否已经存在该工作表名称
P_list_SheetName.Add(P_str_Name);//将工作表名添加到泛型集合中
}
DTable = null;//清空表对象
DTReader = null;//清空表读取对象
olecon.Close();//关闭数据库连接
return P_list_SheetName;//返回得到的泛型集合
}

private void CloseProcess(string P_str_Process)//关闭进程
{
System.Diagnostics.Process[] excelProcess = System.Diagnostics.Process.GetProcessesByName(P_str_Process);//实例化进程对象
foreach (System.Diagnostics.Process p in excelProcess)
p.Kill();//关闭进程
System.Threading.Thread.Sleep(10);//使线程休眠10毫秒
}

}