C#Office.Interop.Excel.dll读写表格

Posted 2022-10-13 小哈龙

本文摘自：C#Office.Interop.Excel.dll读写表格_笨鸟未必先飞的博客-CSDN博客_c# microsoft.office.interop.excel

一.写入excel

/// <summary>
        /// 创建一个Excel表格
        /// Excel中形如Cells[x][y]的写法，前面的数字是列，后面的数字是行!
        /// Excel中的行、列都是从1开始的，而不是0
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>

        private void btn_CreateExcel_Click(object sender, EventArgs e)
        
            //创建一个文档实例
            Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
            app.DisplayAlerts = false; //在程序运行时不被提示和警报消息打扰
            app.Workbooks.Add(true);
            app.ActiveSheet.Name = "总成绩统计表";       //工作表名

            //合并单元格
            Range range = app.get_Range("B2", "D2");   //合并B1~D1的位置
            range.ClearComments();   //清空要合并的区域
            range.MergeCells = true;  //合并单元格
            app.Cells[2][2].Value = "成绩统计表";      //设置单元格（刚刚合并的单元格）的内容
            app.Rows[2].RowHeight = 27;    //设置表格第二行的行高为27（磅）
            app.Rows[2].HorizontalAlignment = XlVAlign.xlVAlignCenter;    //设置表格第二行的内容居中
            

            app.Rows[2].RowHeight = 27;    //设置表格第二行的行高为27（磅）
            app.Rows[2].HorizontalAlignment = XlVAlign.xlVAlignCenter;    //设置表格第二行的内容居中
            app.Rows[3].RowHeight = 27;    
            app.Rows[3].HorizontalAlignment = XlVAlign.xlVAlignCenter;
            app.Rows[4].RowHeight = 27;
            app.Rows[4].HorizontalAlignment = XlVAlign.xlVAlignCenter;
            app.Rows[5].RowHeight = 27;
            app.Rows[5].HorizontalAlignment = XlVAlign.xlVAlignCenter;
            app.Rows[6].RowHeight = 27;
            app.Rows[6].HorizontalAlignment = XlVAlign.xlVAlignCenter;

            app.Cells[2].ColumnWidth = 9;                   //设置表格中第二列的列宽为9
            app.Cells[3].ColumnWidth = 9;                   
            app.Cells[4].ColumnWidth = 9;    
            
            //给表格增加边框，外部和内部都增加了
            for(int i = 2; i< dataGridView1.Rows.Count +  4;i++)
            
                Range range1;
                range1 = app.get_Range("B" + i.ToString(), "D" + i.ToString());
                range1.Borders.LineStyle = XlLineStyle.xlContinuous;
            

            for (int i = 0; i < dataGridView1.Rows.Count; i++)        //行
            
                for (int j = 0; j < dataGridView1.Columns.Count; j++) //列
                
                    app.Cells[j + 2][3] = dataGridView1.Columns[j].HeaderText;   //将dataGridView 中的列标题写入表格
                    app.Cells[j + 2][i + 4] = dataGridView1.Rows[i].Cells[j].Value;      //将dataGridView 中的三行数据写入表格
                 
            

            try
            
                //设置新建表格的保存路径以及名称
                string path = "C:\\\\Users\\\\Administrator\\\\Desktop\\\\成绩表.xlsx";
                app.ActiveWorkbook.SaveAs(path);
                app.Quit();
                app = null;
                MessageBox.Show("创建表格成功");
            
            catch(Exception ex)
            
                MessageBox.Show("创建表格失败" + ex.Message);
            
            
        

二.读excel

 /// <summary>
        /// 读Excel表格，更新dataGridView显示
        /// ws.Cells[i,j] ，i是行，j是列
        /// ws.Cells[i][j],i是列，j是行
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btn_ReadExcel_Click(object sender, EventArgs e)
        

            OpenFileDialog openfile = new OpenFileDialog();

            openfile.Filter = "Excel 文件(*.xls;*.xlsx)|*.xls;*.xlsx";       //设置删选器
            openfile.Title = "打开";                         //对话框表标题
            openfile.RestoreDirectory = true;                //下次打开的是上次选择的目录
            if (openfile.ShowDialog() == DialogResult.OK)
            
               
                object missing = System.Reflection.Missing.Value;
                Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
                Workbook wb = null;
                //以只读的形式打开Excel文件
                try
                
                    wb = excel.Workbooks.Open(openfile.FileName, missing, true, missing, missing, missing,
                                                    missing, missing, missing, true, missing, missing, missing, missing, missing);
                
                catch(Exception ex)
                
                    MessageBox.Show("打开表格文件失败" + ex.Message);
                
                //获取第一个工作表
                Worksheet ws = wb.Worksheets.get_Item(1);
                int rowsint = ws.UsedRange.Cells.Rows.Count;   //获取行数
                int colCount = ws.UsedRange.Cells.Columns.Count;//获取列数


                //将Excel表格中的值更新到Excel
                //因为我在程序初始化时已经设置dataGridView了行和列标题，所以这里直接读取行的数据更新一下dataGridView即可。没有Add行和更新列标题
                for (int i = 4; i <= rowsint + 1; i++)   //行，从表格的第四行开始循环
                
                    for (int j = 2; j <= colCount + 1; j++)
                    
                        dataGridView1.Rows[i - 4].Cells[j - 2].Value = ws.Cells[i,j].Value;
                    
                                           
                        
        

关于Office.Interop.Excel.dll详细信息，参考微软：Microsoft.Office.Interop.Excel Namespace | Microsoft Learn