c#中合并excel表格的方法示例

有多个结构一样的Excel，带复杂表头需要合并为一个，且去掉多余的表头数据，可以用COM组件来读取每个Excel表格的Range来合并到一个新的表格中。样例如图

有很多相同格式的表格，合并代码如下：

using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;
using Excel = Microsoft.Office.Interop.Excel;
namespace ConsoleApplication20
{
   //添加引用-COM-MicroSoft Excel 11.0 Object Libery
   class Program
  {
     static  void Main( string [] args)
    {
       //M为表格宽度标志（Excel中的第M列为最后一列），3为表头高度
      MergeExcel.DoMerge( new  string [] 
      {
        @ "E:/excel/类型A/公司A.xls" , 
        @ "E:/excel/类型A/公司B.xls" 
      },
        @ "E:/excel/类型A/合并测试.xls" , "M" , 3);
      MergeExcel.DoMerge( new  string [] 
      {
        @ "E:/excel/类型B/统计表A.xls" , 
        @ "E:/excel/类型B/统计表B.xls" 
      },
        @ "E:/excel/类型B/合并测试.xls" , "I" , 4);
    }
    
  }
   public  class MergeExcel
  {
    
    Excel.Application app = new Microsoft.Office.Interop.Excel.ApplicationClass();
     //保存目标的对象
    Excel.Workbook bookDest = null ;
    Excel.Worksheet sheetDest = null ;
     //读取数据的对象 
    Excel.Workbook bookSource = null ;
    Excel.Worksheet sheetSource = null ;
     string [] _sourceFiles = null ;
     string _destFile = string .Empty;
     string _columnEnd = string .Empty;
     int _headerRowCount = 1;
     int _currentRowCount = 0;
     public MergeExcel( string [] sourceFiles, string destFile, string columnEnd, int headerRowCount)
    {
      
      bookDest = (Excel.WorkbookClass)app.Workbooks.Add(Missing.Value);
      sheetDest = bookDest.Worksheets.Add(Missing.Value, Missing.Value, Missing.Value, Missing.Value) as Excel.Worksheet;
      sheetDest.Name = "Data" ;
      _sourceFiles = sourceFiles;
      _destFile = destFile;
      _columnEnd = columnEnd;
      _headerRowCount = headerRowCount;
    }
     /// <summary>
     /// 打开工作表
     /// </summary>
     /// <param name="fileName"></param>
     void OpenBook( string fileName)
    {
      bookSource = app.Workbooks._Open(fileName, Missing.Value, Missing.Value, Missing.Value, Missing.Value
        , Missing.Value, Missing.Value, Missing.Value, Missing.Value
        , Missing.Value, Missing.Value, Missing.Value, Missing.Value);
      sheetSource = bookSource.Worksheets[1] as Excel.Worksheet;
    }
     /// <summary>
     /// 关闭工作表
     /// </summary>
     void CloseBook()
    {
      bookSource.Close( false , Missing.Value, Missing.Value);
    }
     /// <summary>
     /// 复制表头
     /// </summary>
     void CopyHeader()
    {
      Excel.Range range = sheetSource.get_Range( "A1" , _columnEnd + _headerRowCount.ToString());
      range.Copy(sheetDest.get_Range( "A1" ,Missing.Value));
      _currentRowCount += _headerRowCount;
    }
     /// <summary>
     /// 复制数据
     /// </summary>
     void CopyData()
    {
       int sheetRowCount = sheetSource.UsedRange.Rows.Count;
      Excel.Range range = sheetSource.get_Range( string .Format( "A{0}" , _headerRowCount + 1), _columnEnd + sheetRowCount.ToString());
      range.Copy(sheetDest.get_Range( string .Format( "A{0}" , _currentRowCount + 1), Missing.Value));
      _currentRowCount += range.Rows.Count;
    }
     /// <summary>
     /// 保存结果
     /// </summary>
     void Save()
    {
      bookDest.Saved = true ;
      bookDest.SaveCopyAs(_destFile);
    }
     /// <summary>
     /// 退出进程
     /// </summary>
     void Quit()
    {
      app.Quit();
    }
     /// <summary>
     /// 合并
     /// </summary>
     void DoMerge()
    {
       bool b = false ;
       foreach ( string strFile in _sourceFiles)
      {
        OpenBook(strFile);
         if (b == false )
        {
          CopyHeader();
          b = true ;
        }
        CopyData();
        CloseBook();
      }
      Save();
      Quit();
    }
     /// <summary>
     /// 合并表格
     /// </summary>
     /// <param name="sourceFiles">源文件</param>
     /// <param name="destFile">目标文件</param>
     /// <param name="columnEnd">最后一列标志</param>
     /// <param name="headerRowCount">表头行数</param>
     public  static  void DoMerge( string [] sourceFiles, string destFile, string columnEnd, int headerRowCount)
    {
       new MergeExcel(sourceFiles, destFile, columnEnd, headerRowCount).DoMerge();
    }
  }
}

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