C#读写Excel的方法有几种
1 使用Office自带的库
前提是本机须安装office才能运行，且不同的office版本之间可能会有兼容问题，从Nuget下载 Microsoft.Office.Interop.Excel
读写代码如下：
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 }
2. 使用NPOI
地址：https://github.com/tonyqus/npoi
在不安装office的时候也是可以读写的，速度很快，从Nuget下载 NPOI
读写代码如下：
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(); }
3. 使用ClosedXml
地址：https://github.com/ClosedXML/ClosedXML
从Nuget下载ClosedXml
读写代码如下：
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); }
4. 使用 spire.xls
地址：https://www.e-iceblue.com/Introduce/free-xls-component.html
spire分免费和收费，无特殊需求用免费即可
从Nuget下载Free Spire.xls For .NET
读写代码如下：
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); }
5. EPPLUS
地址：https://github.com/pruiz/EPPlus/tree/master/EPPlus
没用过这个，暂时就不做介绍了