1.项目添加Word和Excel的COM类型库引用

2.创建Excel工作表

            //定义Excel操作对象
            Microsoft.Office.Interop.Excel.Application excelApp = new Microsoft.Office.Interop.Excel.Application();
            //定义Excel工作表
            Microsoft.Office.Interop.Excel.Worksheet worksheet = excelApp.Workbooks.Add().Worksheets[1];

3.设置Excel表格的标题

            //设置标题样式[2, 2]开始
            worksheet.Cells[2, 2] = "成绩单";  //设置标题内容
            worksheet.Cells[2, 2].RowHeight = 25;   //高度
            Microsoft.Office.Interop.Excel.Range range = worksheet.get_Range("B2", "H2"); //这里Range和get_Range都不会给提示
            range.Merge(0); //合并为标题
            range.Borders.Value = 1;    //设置表头的边框
            range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter; //单元格内容居中
            range.Font.Size = 15;

 

4.加载数据进入Excel表格

            //获取总列数和总行数
            int columnCount = dgv.ColumnCount;
            int rowCount = dgv.RowCount;

            //显示列标题
            for (int i = 0; i < columnCount; i++)
            {
                //从第三行开始
                worksheet.Cells[3, i + 2] = dgv.Columns[i].HeaderText;  //获取dgv列标题
                worksheet.Cells[3, i + 2].Borders.value = 1;    //这个Borders不会提示
                worksheet.Cells[3, i + 2].RowHeight = 23;
            }

            //显示表格数据
            for (int i = 0; i < rowCount-1; i++)
            {
                for (int n = 0; n < columnCount; n++)
                {
                    //从第三行开始
                    worksheet.Cells[i + 4, n + 2] = dgv.Rows[i + 1].Cells[n].Value;  //获取dgv列标题
                    worksheet.Cells[i + 4, n + 2].Borders.value = 1;    //这个Borders不会提示
                    worksheet.Cells[i + 4, n + 2].RowHeight = 23;
                }
            }
            //设置列宽和数据一致
            worksheet.Columns.AutoFit();

5.显示和释放工作簿对象

            //预览
            excelApp.Visible = true;
            //excelApp.Sheets.PrintPreview(false);   //要打印就用这个

            //释放对象
            excelApp.Quit();
            System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApp);
            excelApp = null;