winfrom導出DataGridView爲Excel方法

聲明：此方法需要電腦安裝Excel軟件

需要類庫：Microsoft.Office.Interop.Excel.dll 可百度自行下載

方法代碼：

        /// <summary>
        /// 導出exc
        /// </summary>
        /// <param name="dataGridView"></param>
        ///  <param name="name">文件名字</param>
        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("無法創建Excel對象，您的電腦可能未安裝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 
                                                                                         //寫入標題             
            for (int i = 0; i < dataGridView.ColumnCount; i++)
            { worksheet.Cells[1, i + 1] = dataGridView.Columns[i].HeaderText; }
            //寫入數值
            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();//列寬自適應
            MessageBox.Show("導出成功", "提示", MessageBoxButtons.OK);
            if (saveFileName != "")
            {
                try
                {
                    workbook.Saved = true;
                    workbook.SaveCopyAs(saveFileName);  //fileSaved = true;                 
                }
                catch (Exception ex)
                {
                    MessageBox.Show("導出文件時出錯,文件可能正被打開！\n" + ex.Message);
                }
            }
            xlApp.Quit();
            GC.Collect();//強行銷燬           
        }