VisualStudio C#写入读取excel

首先，本文的write和read都可以成功运行。（环境：VS2012,office2016）

不过需要添加一个excel引用。并且在代码的开头需要调用该引用的命名空间，使用别名。using Excel = Microsoft.Office.Interop.Excel;

写入和读取代码和其他程序一样都有很多种方法，本文只是各展示了一种方法，因为本人时间和精力有限。对于写入代码可能需要使用循环写入，对于读取代码是一次性读取的。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Excel = Microsoft.Office.Interop.Excel;      //需要手动添加引用


namespace ReadExcel
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string filepath = "C:\\Users\\Administrator\\Desktop\\LaserFitting\\result.xlsx";
            OpenExcel(filepath);
        }


        //将数据写入已存在Excel
        public static void writeExcel(double[] result, string filepath)
        {
            //1.创建Applicaton对象
            Microsoft.Office.Interop.Excel.Application xApp = new
            Microsoft.Office.Interop.Excel.Application();

            //2.得到workbook对象，打开已有的文件
            Microsoft.Office.Interop.Excel.Workbook xBook = xApp.Workbooks.Open(filepath,
                                Missing.Value, Missing.Value, Missing.Value, Missing.Value,
                                Missing.Value, Missing.Value, Missing.Value, Missing.Value,
                                Missing.Value, Missing.Value, Missing.Value, Missing.Value);

            //3.指定要操作的Sheet
            Microsoft.Office.Interop.Excel.Worksheet xSheet = (Microsoft.Office.Interop.Excel.Worksheet)xBook.Sheets[1];

            //在第一列的左边插入一列  1:第一列
            //xlShiftToRight:向右移动单元格   xlShiftDown:向下移动单元格
            //Range Columns = (Range)xSheet.Columns[1, System.Type.Missing];
            //Columns.Insert(XlInsertShiftDirection.xlShiftToRight, Type.Missing);

            //4.向相应对位置写入相应的数据
            xSheet.Cells[1][1] = result[1];

            //5.保存保存WorkBook
            xBook.Save();
            //6.从内存中关闭Excel对象

            xSheet = null;
            xBook.Close();
            xBook = null;
            //关闭EXCEL的提示框
            xApp.DisplayAlerts = false;
            //Excel从内存中退出
            xApp.Quit();
            xApp = null;
        }

        private void OpenExcel(string strFileName)
        {
            object missing = System.Reflection.Missing.Value;
            Excel.Application excel = new Excel.Application();//lauch excel application
            if (excel == null)
            {
                this.label1.Text = "Can't access excel";
            }
            else
            {
                excel.Visible = false; excel.UserControl = true;
                // 以只读的形式打开EXCEL文件
                Excel.Workbook wb = excel.Application.Workbooks.Open(strFileName, missing, true, missing, missing, missing,
                 missing, missing, missing, true, missing, missing, missing, missing, missing);
                //取得第一个工作薄
                Excel.Worksheet ws = (Excel.Worksheet)wb.Worksheets.get_Item(1);
                //取得总记录行数    (包括标题列)
                int rowsint = ws.UsedRange.Cells.Rows.Count; //得到行数
                //int columnsint = mySheet.UsedRange.Cells.Columns.Count;//得到列数
                //取得数据范围区域   (不包括标题列)  
                Excel.Range rng1 = ws.Cells.get_Range("A2", "A" + rowsint);
                Excel.Range rng2 = ws.Cells.get_Range("B2", "B" + rowsint);
                Excel.Range rng3 = ws.Cells.get_Range("C2", "C" + rowsint);
                Excel.Range rng4 = ws.Cells.get_Range("D2", "D" + rowsint);
                object[,] arry1 = (object[,])rng1.Value2;   //get range's value
                object[,] arry2 = (object[,])rng2.Value2;
                object[,] arry3 = (object[,])rng3.Value2;   //get range's value
                object[,] arry4 = (object[,])rng4.Value2;
                //将新值赋给一个数组
                string[,] arry = new string[rowsint - 1, 4];
                //for (int i = 1; i <= rowsint - 1; i++)
                for (int i = 1; i <= rowsint - 2; i++)
                {

                    arry[i - 1, 0] = arry1[i, 1].ToString();

                    arry[i - 1, 1] = arry2[i, 1].ToString();

                    arry[i - 1, 2] = arry3[i, 1].ToString();

                    arry[i - 1, 3] = arry4[i, 1].ToString();
                }
                string a = "";
                for (int i = 0; i <= rowsint - 3; i++)
                {
                    a += arry[i, 0] + "|" + arry[i, 1] + "|" + arry[i, 2] + "|" + arry[i, 3] + "\n";

                }
                this.label1.Text = a;
            }
            excel.Quit(); excel = null;
            Process[] procs = Process.GetProcessesByName("excel");
            foreach (Process pro in procs)
            {
                pro.Kill();//没有更好的方法,只有杀掉进程
            }
            GC.Collect();
        }
    }
}

参考写入链接1
参考读取链接2