详解C#读写Excel的几种方法

using Microsoft.Office.Interop.Excel;using Excel = Microsoft.Office.Interop.Excel;    private void btn_Office_Click(object sender, EventArgs e)    {      string importExcelPath = "E://import.xlsx";      string exportExcelPath = "E://export.xlsx";      //创建      Excel.Application xlApp = new Excel.Application();      xlApp.DisplayAlerts = false;      xlApp.Visible = false;      xlApp.ScreenUpdating = false;      //打开Excel      Excel.Workbook xlsWorkBook = xlApp.Workbooks.Open(importExcelPath, System.Type.Missing, System.Type.Missing, System.Type.Missing,      System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing,      System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing);      //处理数据过程，更多操作方法自行百度      Excel.Worksheet sheet = xlsWorkBook.Worksheets[1];//工作薄从1开始，不是0      sheet.Cells[1, 1] = "test";      //另存      xlsWorkBook.SaveAs(exportExcelPath, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, XlSaveAsAccessMode.xlNoChange,        Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);      //关闭Excel进程      ClosePro(xlApp, xlsWorkBook);    }    public void ClosePro(Excel.Application xlApp, Excel.Workbook xlsWorkBook)    {      if (xlsWorkBook != null)        xlsWorkBook.Close(true, Type.Missing, Type.Missing);      xlApp.Quit();      // 安全回收进程      System.GC.GetGeneration(xlApp);      IntPtr t = new IntPtr(xlApp.Hwnd);  //获取句柄      int k = 0;      GetWindowThreadProcessId(t, out k);  //获取进程唯一标志      System.Diagnostics.Process p = System.Diagnostics.Process.GetProcessById(k);      p.Kill();   //关闭进程    }

using System.IO;using NPOI;using NPOI.SS.UserModel;    private void btn_NPOI_Click(object sender, EventArgs e)    {      string importExcelPath = "E://import.xlsx";      string exportExcelPath = "E://export.xlsx";      IWorkbook workbook = WorkbookFactory.Create(importExcelPath);      ISheet sheet = workbook.GetSheetAt(0);//获取第一个工作薄      IRow row = (IRow)sheet.GetRow(0);//获取第一行      //设置第一行第一列值,更多方法请参考源官方Demo      row.CreateCell(0).SetCellValue("test");//设置第一行第一列值      //导出excel      FileStream fs = new FileStream(exportExcelPath, FileMode.Create, FileAccess.ReadWrite);      workbook.Write(fs);      fs.Close();    }

using ClosedXML;using ClosedXML.Excel;    private void btn_ClosedXML_Click(object sender, EventArgs e)    {      string importExcelPath = "E://import.xlsx";      string exportExcelPath = "E://export.xlsx";      var workbook = new XLWorkbook(importExcelPath);      IXLWorksheet sheet = workbook.Worksheet(1);//这个库也是从1开始      //设置第一行第一列值,更多方法请参考官方Demo      sheet.Cell(1, 1).Value = "test";//该方法也是从1开始，非0      workbook.SaveAs(exportExcelPath);    }

using Spire.Xls;    private void btnSpire_Click(object sender, EventArgs e)    {      string importExcelPath = "E://import.xlsx";      string exportExcelPath = "E://export.xlsx";      Spire.Xls.Workbook workbook = new Spire.Xls.Workbook();      workbook.LoadFromFile(importExcelPath);      //处理Excel数据，更多请参考官方Demo      Spire.Xls.Worksheet sheet = workbook.Worksheets[0];      sheet.Range[1,1].Text = "test";//该方法也是从1开始，非0      workbook.SaveToFile(exportExcelPath);    }