C#讀取和寫入excel資料

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Reflection;
using Microsoft.Office.Interop.Excel;

namespace test1
{
    class Program
    {
        public static Array ReadXls(string filename, int index)//讀取第index個sheet的資料
        {
            //啟動Excel應用程式
            Microsoft.Office.Interop.Excel.Application xls = new Microsoft.Office.Interop.Excel.Application();
            //開啟filename表
            _Workbook book = xls.Workbooks.Open(filename, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);

            _Worksheet sheet;//定義sheet變數
            xls.Visible = false;//設定Excel後臺執行
            xls.DisplayAlerts = false;//設定不顯示確認修改提示

            try
            {
                sheet = (_Worksheet)book.Worksheets.get_Item(index);//獲得第index個sheet，準備讀取
            }
            catch (Exception ex)//不存在就退出
            {
                Console.WriteLine(ex.Message);
                return null;
            }
            Console.WriteLine(sheet.Name);
            int row = sheet.UsedRange.Rows.Count;//獲取不為空的行數
            int col = sheet.UsedRange.Columns.Count;//獲取不為空的列數

           // Array value = (Array)sheet.get_Range(sheet.Cells[1, 1], sheet.Cells[row, col]).Cells.Value2;//獲得區域資料賦值給Array陣列，方便讀取
           
            Microsoft.Office.Interop.Excel.Range range = sheet.Range[sheet.Cells[1,1],sheet.Cells[row,col]];
            Array value = (Array)range.Value2;

            book.Save();//儲存
            book.Close(false, Missing.Value, Missing.Value);//關閉開啟的表
            xls.Quit();//Excel程式退出
            //sheet,book,xls設定為null，防止記憶體洩露
            sheet = null;
            book = null;
            xls = null;
            GC.Collect();//系統回收資源
            return value;
        }

        static void Main(string[] args)
        {
            string Current;
            Current = Directory.GetCurrentDirectory();//獲取當前根目錄
            Array Data = ReadXls(Current + "\\test3.xlsx", 1);//讀取test.xlsx的第一個sheet表
            foreach (string temp in Data)
                Console.WriteLine(temp);
            Console.ReadKey();
        }


/*--------------------------------------------------------將資料寫入excel------------------------------------------------------------------
        public static bool WriteXls(string filename,string a)
        {
            //啟動Excel應用程式
            Microsoft.Office.Interop.Excel.Application xlsx = new Microsoft.Office.Interop.Excel.Application();
            _Workbook book = xlsx.Workbooks.Add(Missing.Value); //建立一張表，一張表可以包含多個sheet

            //如果表已經存在，可以用下面的命令開啟
            //_Workbook book = xls.Workbooks.Open(filename, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);

            _Worksheet sheet;//定義sheet變數
            xlsx.Visible = false;//設定Excel後臺執行
            xlsx.DisplayAlerts = false;//設定不顯示確認修改提示

            for (int i = 1; i < 4; i++)//迴圈建立並寫入資料到sheet
            {
                try
                {
                    sheet = (_Worksheet)book.Worksheets.get_Item(i);//獲得第i個sheet，準備寫入
                }
                catch (Exception ex)//不存在就增加一個sheet
                {
                    sheet = (_Worksheet)book.Worksheets.Add(Missing.Value, book.Worksheets[book.Sheets.Count], 1, Missing.Value);
                }
                sheet.Name = "第" + i.ToString() + "頁";//設定當前sheet的Name
                for (int row = 1; row < 20; row++)//迴圈設定每個單元格的值
                {
                    for (int offset = 1; offset < 10; offset++)
                        sheet.Cells[row, offset] = "( " + row.ToString() + "," + offset.ToString() + " )"+a;

                }
            }
            //將表另存為
            book.SaveAs(filename, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);

            //如果表已經存在，直接用下面的命令儲存即可
            //book.Save();

            book.Close(false, Missing.Value, Missing.Value);//關閉開啟的表
            xlsx.Quit();//Excel程式退出
            //sheet,book,xls設定為null，防止記憶體洩露
            sheet = null;
            book = null;
            xlsx = null;
            GC.Collect();//系統回收資源
            return true;
        }
        static void Main(string[] args)
        {
            string Current,zqh="zqh";
            Current = Directory.GetCurrentDirectory();//獲取當前根目錄
            WriteXls(Current + "\\test.xlsx",zqh);
        }
        */

/*--------------------------------------------------------------------將資料寫入text-------------------------------------------------------------------------
        static void Main(string[] args)
        {
            
            StreamWriter sw = new StreamWriter("f:\\C#\\temp4.txt", true, Encoding.GetEncoding("gb2312"));
            string data = "hello world";
            sw.WriteLine(data);
            int[] a = {1,2,3,4,5,6};
            sw.WriteLine(a.Length);
            for(int i=0;i<a.Length;i++)
            {
                sw.WriteLine(a[i]);
            }
            //sw.Close();
            while (true)
            {
                string email, email0 = "請輸入你的電子郵箱";
                Console.WriteLine(email0);
                email = Console.ReadLine();
                sw.WriteLine(email0);
                sw.WriteLine(email);
                Console.WriteLine("你的郵箱是{0}", email);
                Console.WriteLine("繼續輸入郵箱嗎？");
                string input = Console.ReadLine();
                sw.WriteLine(input);
                if (input.ToUpper() == "YES") continue;
                else break;
            }

           sw.Close(); 
        }
*/
    }
}
 

引用好Microsoft.Office.Interop.Excel可以直接讀取，

原來用的這句話：

 // Array value = (Array)sheet.get_Range(sheet.Cells[1, 1], sheet.Cells[row, col]).Cells.Value2;//獲得區域資料賦值給Array陣列，方便讀取

Microsoft.Office.Interop.Excel.Range range = sheet.Range[sheet.Cells[1,1],sheet.Cells[row,col]];
            Array value = (Array)range.Value2;
 

還有一點：如果excel中的內容資料格式不同，可以用var型別，比如：

 foreach (var temp in Data)
                   Console.WriteLine(temp);