C# 导出EXCEL 和导入

1.导出

使用winfrom简单做个界面

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选择导出路径 + XLSX起名字

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打开导出是XLSX文件

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代码部分

// 创建Excel应用程序对象
            Excel.Application excelApp = new Excel.Application();
            excelApp.Visible = false;

            // 创建工作簿
            Excel.Workbook workbook = excelApp.Workbooks.Add(Type.Missing);
            Excel.Worksheet worksheet = (Excel.Worksheet)workbook.ActiveSheet;

            // 填充数据
            DataTable dt = GetDataTable(); // 获取数据源
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                for (int j = 0; j < dt.Columns.Count; j++)
                {
                    worksheet.Cells[i + 1, j + 1] = dt.Rows[i][j].ToString();
                }
            }

            // 保存Excel文件
            SaveFileDialog saveFileDialog = new SaveFileDialog();
            saveFileDialog.Filter = "Excel文件|*.xlsx";
            saveFileDialog.Title = "保存Excel文件";
            if (saveFileDialog.ShowDialog() == DialogResult.OK)
            {
                workbook.SaveAs(saveFileDialog.FileName);
                MessageBox.Show("导出成功！");
            }

            // 关闭Excel应用程序
            excelApp.Quit();
            System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheet);
            System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook);
            System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApp);

            private DataTable GetDataTable()
            {
                // 模拟数据源
                DataTable dt = new DataTable();
                dt.Columns.Add("姓名");
                dt.Columns.Add("年龄");
                dt.Columns.Add("性别");
                dt.Rows.Add("张三", 20, "男");
                dt.Rows.Add("李四", 25, "女");
                dt.Rows.Add("王五", 30, "男");
                return dt;
            }

2.导入EXCE

创建一个简单的页面

下载插件 ExcelDataReader和ExcelDataReader.DataSet依赖项

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新建EXCEL表格

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点击按钮读取EXCEL

代码部分

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using ExcelDataReader;

namespace daoruxlsc
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void LoadExcelData(string filePath)
        {
            using (var stream = File.Open(filePath, FileMode.Open, FileAccess.Read))
            {
                using (var reader = ExcelReaderFactory.CreateReader(stream))
                {
                    var result = reader.AsDataSet(new ExcelDataSetConfiguration
                    {
                        ConfigureDataTable = _ => new ExcelDataTableConfiguration
                        {
                            UseHeaderRow = true
                        }
                    });

                    dataGridView1.DataSource = result.Tables[0];
                }
            }
        }
        private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();
            openFileDialog.Filter = "Excel Files|*.xls;*.xlsx;*.xlsm";
            if (openFileDialog.ShowDialog() == DialogResult.OK)
            {
                string filePath = openFileDialog.FileName;
                LoadExcelData(filePath);
            }
        }
    }
}