C# 导出EXCEL 和 导入

使用winfrom简单做个界面

选择导出路径 + XLSX起名字

打开导出是XLSX文件

// 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);