C#读取Excel方法

 方法一：使用OleDb

   using System.Data.OleDb

 

     ///   <summary>
     ///  返回Excel数据源
     ///   </summary>
     ///   <param name="filename"> 文件路径 </param>
     ///   <returns></returns>
     static   public  DataSet ExcelToDataSet( string  filename)
    {
        DataSet ds;
         string  strCon  =   " Provider=Microsoft.Jet.OLEDB.4.0; "   +
                         " Extended Properties=Excel 8.0; "   +
                         " data source= "   +  filename;
        OleDbConnection myConn  =   new  OleDbConnection(strCon);
         string  strCom  =   "  SELECT * FROM [Sheet1$] " ;
        myConn.Open();
        OleDbDataAdapter myCommand  =   new  OleDbDataAdapter(strCom, myConn);
        ds  =   new  DataSet();
        myCommand.Fill(ds);
        myConn.Close();
         return  ds;
    }

 

方法二： 使用COM

    导入Microsoft.Excel
     using  Excel =  Microsoft.Office.Interop.Excel;
     using  System.Diagnostics;

     public   class  ExcelHelper
    {
         private  Excel._Application excelApp;
         private   string  fileName  =   string .Empty;
         private  Excel.WorkbookClass wbclass;
         public  ExcelHelper( string  _filename)
        {
            excelApp  =   new  Excel.Application();
             object  objOpt  =  System.Reflection.Missing.Value;
            wbclass  =  (Excel.WorkbookClass)excelApp.Workbooks.Open(_filename, objOpt,  false , objOpt, objOpt, objOpt,  true , objOpt, objOpt,  true , objOpt, objOpt, objOpt, objOpt, objOpt);
        }
         /**/
         ///   <summary>
         ///  所有sheet的名称列表
         ///   </summary>
         ///   <returns></returns>
         public  List < string >  GetSheetNames()
        {
            List < string >  list  =   new  List < string > ();
            Excel.Sheets sheets  =  wbclass.Worksheets;
             string  sheetNams  =   string .Empty;
             foreach  (Excel.Worksheet sheet  in  sheets)
            {
                list.Add(sheet.Name);
            }
             return  list;
        }
         public  Excel.Worksheet GetWorksheetByName( string  name)
        {
            Excel.Worksheet sheet  =   null ;
            Excel.Sheets sheets  =  wbclass.Worksheets;
             foreach  (Excel.Worksheet s  in  sheets)
            {
                 if  (s.Name  ==  name)
                {
                    sheet  =  s;
                     break ;
                }
            }
             return  sheet;
        }
         /**/
         ///   <summary>
         ///
         ///   </summary>
         ///   <param name="sheetName"> sheet名称 </param>
         ///   <returns></returns>
         public  Array GetContent( string  sheetName)
        {
            Excel.Worksheet sheet  =  GetWorksheetByName(sheetName);
             // 获取A1 到AM24范围的单元格
            Excel.Range rang  =  sheet.get_Range( " A1 " ,  " AM24 " );
             // 读一个单元格内容
             // sheet.get_Range("A1", Type.Missing);
             // 不为空的区域,列,行数目
             //    int l = sheet.UsedRange.Columns.Count;
             //  int w = sheet.UsedRange.Rows.Count;
             //   object[,] dell = sheet.UsedRange.get_Value(Missing.Value) as object[,];
            System.Array values  =  (Array)rang.Cells.Value2;
             return  values;
        }

         public   void  Close()
        {
            excelApp.Quit();
            excelApp  =   null ;
        }

    }

 

 

 转自：http://www.cnblogs.com/seaboy/archive/2008/10/16/1312512.html