1 使用Office自帶的庫
前提是本機(jī)須安裝office才能運(yùn)行，且不同的office版本之間可能會(huì)有兼容問題，從Nuget下載 Microsoft.Office.Interop.Excel

讀寫代碼如下：

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";
            //創(chuàng)建
            Excel.Application xlApp = new Excel.Application();
            xlApp.DisplayAlerts = false;
            xlApp.Visible = false;
            xlApp.ScreenUpdating = false;
            //打開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);

            //處理數(shù)據(jù)過程，更多操作方法自行百度
            Excel.Worksheet sheet = xlsWorkBook.Worksheets[1];//工作薄從1開始，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);
            //關(guān)閉Excel進(jìn)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();
            // 安全回收進(jìn)程
            System.GC.GetGeneration(xlApp);
            IntPtr t = new IntPtr(xlApp.Hwnd);   //獲取句柄
            int k = 0;
            GetWindowThreadProcessId(t, out k);   //獲取進(jìn)程唯一標(biāo)志
            System.Diagnostics.Process p = System.Diagnostics.Process.GetProcessById(k);
            p.Kill();     //關(guān)閉進(jìn)程
        }

2. 使用NPOI
地址：https://github.com/tonyqus/npoi
在不安裝office的時(shí)候也是可以讀寫的，速度很快，從Nuget下載 NPOI

讀寫代碼如下：

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);//獲取第一個(gè)工作薄
            IRow row = (IRow)sheet.GetRow(0);//獲取第一行

            //設(shè)置第一行第一列值,更多方法請(qǐng)參考源官方Demo
            row.CreateCell(0).SetCellValue("test");//設(shè)置第一行第一列值

            //導(dǎo)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
從Nuget下載 ClosedXml

讀寫代碼如下：

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);//這個(gè)庫也是從1開始
            //設(shè)置第一行第一列值,更多方法請(qǐng)參考官方Demo
            sheet.Cell(1, 1).Value = "test";//該方法也是從1開始，非0

            workbook.SaveAs(exportExcelPath);
        }

4. 使用 spire.xls
地址：https://www./Introduce/free-xls-component.html
spire分免費(fèi)和收費(fèi)，無特殊需求用免費(fèi)即可
從Nuget下載 Free Spire.xls For .NET

讀寫代碼如下：

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);
            //處理Excel數(shù)據(jù)，更多請(qǐng)參考官方Demo
            Spire.Xls.Worksheet sheet = workbook.Worksheets[0];
            sheet.Range[1,1].Text = "test";//該方法也是從1開始，非0

            workbook.SaveToFile(exportExcelPath);
        }

5. EPPLUS
   地址：https://github.com/pruiz/EPPlus/tree/master/EPPlus
   沒用過這個(gè)，就不做介紹了