winfrom导出DataGridView为Excel方法

声明：此方法需要电脑安装Excel软件

需要类库：Microsoft.Office.Interop.Excel.dll 可百度自行下载

方法代码：

        /// 

        /// 导出exc
        /// 
        /// 
        ///  文件名字
        public static void Import(DataGridView dataGridView,string name){
            string fileName = name;
            string saveFileName = "";
            SaveFileDialog saveDialog = new SaveFileDialog();
            saveDialog.DefaultExt = "xlsx";
            saveDialog.Filter = "Excel文件|*.xlsx";
            saveDialog.FileName = fileName;
           var alert= saveDialog.ShowDialog();
            if (alert!=DialogResult.OK)
            {
                return;
            }
            saveFileName = saveDialog.FileName;
            Microsoft.Office.Interop.Excel.Application xlApp =
                                new Microsoft.Office.Interop.Excel.Application();
            if (xlApp == null)
            {
                MessageBox.Show("无法创建Excel对象，您的电脑可能未安装Excel");
                return;
            }
            Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
            Microsoft.Office.Interop.Excel.Workbook workbook =
                        workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
            Microsoft.Office.Interop.Excel.Worksheet worksheet =
                        (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1 
                                                                                         //写入标题             
            for (int i = 0; i < dataGridView.ColumnCount; i++)
            { worksheet.Cells[1, i + 1] = dataGridView.Columns[i].HeaderText; }
            //写入数值
            for (int r = 0; r < dataGridView.Rows.Count; r++)
            {
                for (int i = 0; i < dataGridView.ColumnCount; i++)
                {
                    worksheet.Cells[r + 2, i + 1] = dataGridView.Rows[r].Cells[i].Value;
                }
                System.Windows.Forms.Application.DoEvents();
            }
            worksheet.Columns.EntireColumn.AutoFit();//列宽自适应
            MessageBox.Show("导出成功", "提示", MessageBoxButtons.OK);
            if (saveFileName != "")
            {
                try
                {
                    workbook.Saved = true;
                    workbook.SaveCopyAs(saveFileName);  //fileSaved = true;                 
                }
                catch (Exception ex)
                {
                    MessageBox.Show("导出文件时出错,文件可能正被打开！\n" + ex.Message);
                }
            }
            xlApp.Quit();
            GC.Collect();//强行销毁           
        }