C#如何读取Excel

   Excel.Application excel = null;
   Excel.Workbooks wbs = null;
   Excel.Workbook wb = null;
   Excel.Worksheet ws = null;
   Excel.Range range1 = null;
   object Nothing = System.Reflection.Missing.Value;
     
   try
   ...{
    excel = new Excel.Application();
    excel.UserControl = true;
    excel.DisplayAlerts = false;
                     
    excel.Application.Workbooks.Open(this.FilePath,Nothing,Nothing,Nothing,Nothing,Nothing,Nothing,Nothing,Nothing,Nothing,Nothing,Nothing,Nothing ) ;
     
    wbs = excel.Workbooks;
    wb = wbs[1];
    ws = (Excel.Worksheet)wb.Worksheets["Sheet2"];
     
          
    int rowCount = ws.UsedRange.Rows.Count;
    int colCount = ws.UsedRange.Columns.Count;
    if (rowCount <= 0)
     throw new InvalidFormatException("文件中没有数据记录");
    if (colCount < 4 ) 
     throw new InvalidFormatException("字段个数不对");
     
    for (int i = 0;i    ...{

     this.rowNo = i + 1;
     object[] row = new object[4];
     for (int j = 0;j<4;j++)
     ...{
      range1 = ws.get_Range(ws.Cells[i+2,j+1],ws.Cells[i+2,j+1]);
      row[j] = range1.Value;

      if (row[0] == null)
      ...{
       this.isNullRecord++;
       break;
      }
     }
                    
     if (this.isNullRecord > 0)
      continue;

     DataRow dataRow = this.readExcel(row);

     if (this.isNullRecord == 1)
      continue;
   
     if (this.verifyData(dataRow) == false)
      errFlag++;
   
     this.updateTableCurr(dataRow);
    }
     
   }
   finally
   ...{
    if (excel != null)
    ...{
     if (wbs != null)
     ...{
      if (wb != null)
      ...{
       if (ws != null)
       ...{
        if (range1 != null)
        ...{
         System.Runtime.InteropServices.Marshal.ReleaseComObject(range1);
         range1 = null;
        }
        System.Runtime.InteropServices.Marshal.ReleaseComObject(ws);
        ws = null;
       }
       wb.Close(false,Nothing,Nothing);  
       System.Runtime.InteropServices.Marshal.ReleaseComObject(wb);
       wb = null;
      }
      wbs.Close();
      System.Runtime.InteropServices.Marshal.ReleaseComObject(wbs);
      wbs = null;
     }
     excel.Application.Workbooks.Close();
     excel.Quit();
     System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);
     excel = null;
     GC.Collect();
    }
   }

		

private DataSet importExcelToDataSet(string FilePath)
  ...{
   string strConn;
   strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + FilePath + ";Extended Properties=Excel 8.0;";
   OleDbConnection conn = new OleDbConnection(strConn);
   OleDbDataAdapter myCommand = new OleDbDataAdapter("SELECT * FROM [Sheet1$]",strConn);
   DataSet myDataSet = new DataSet();
   try
   ...{
    myCommand.Fill(myDataSet);
   }
   catch(Exception ex)
   ...{
    throw new InvalidFormatException("该Excel文件的工作表的名字不正确," + ex.Message);
   }
   return myDataSet;
  }

		

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.Office.Interop.Excel;
using Microsoft.Office.Core;
using System.IO;
using System.Reflection;

namespace DemoExcel
...{
    public partial class Form1 : Form
    ...{
        private  object missing = Missing.Value;
        private Microsoft.Office.Interop.Excel.Application ExcelRS;
        private Microsoft.Office.Interop.Excel.Workbook RSbook;
        private Microsoft.Office.Interop.Excel.Worksheet RSsheet;

        public Form1()
        ...{
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        ...{
            // TODO: 这行代码将数据加载到表“dataSet1.STREET”中。您可以根据需要移动或移除它。
            this.sTREETTableAdapter.Fill(this.dataSet1.STREET);

        }

        private void button1_Click(object sender, EventArgs e)
        ...{
            string OutFilePath = System.Windows.Forms.Application.StartupPath + @" emp.xls";
           
            string TemplateFilePath = System.Windows.Forms.Application.StartupPath + @"模版.xls";
            PrintInit(TemplateFilePath,OutFilePath);
        }
        Excle输出前初始化#region Excle输出前初始化
        /**//// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public bool PrintInit(string templetFile, string outputFile)
        ...{
            try
            ...{
                if (templetFile == null)
                ...{
                    MessageBox.Show("Excel模板文件路径不能为空！");
                    return false;
                }
                if (outputFile == null)
                ...{
                    MessageBox.Show("输出Excel文件路径不能为空！");
                    return false;
                }
                //把模版文件templetFile拷贝到目输出文件outputFile中,并且目标文件可以改写
                System.IO.File.Copy(templetFile, outputFile, true);
                if (this.ExcelRS != null)
                    ExcelRS = null;
                //实例化ExcelRS对象
                ExcelRS = new Microsoft.Office.Interop.Excel.ApplicationClass();
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C# 读取Excel