C# winfrom 导出 Excel

private void 导出ToolStripMenuItem_Click(object sender, EventArgs e) {
            string path = "";
            SaveFileDialog save = new SaveFileDialog();
            save.DefaultExt = "xlsx";
            save.Filter = "Excel File(*.xlsx)|*.xlsx";
            if (save.ShowDialog() == DialogResult.OK) {
                path = save.FileName;
                if(DataTableToExcel(path,dt,true)) {
                    MessageBox.Show("导出成功");
                }
            }
            else {
                return;
            }
        }
        public  bool DataTableToExcel(string filePath, System.Data.DataTable dataTable, bool isShowExcle) {
            //System.Data.DataTable dataTable = dataSet.Tables[0];  
            int rowNumber = dataTable.Rows.Count;
            int columnNumber = dataTable.Columns.Count;
            int colIndex = 0;
            if (rowNumber == 0) {
                return false;
            }
            Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
            Microsoft.Office.Interop.Excel.Workbook workbook = excel.Workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
            Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];
            excel.Visible = isShowExcle;
            Microsoft.Office.Interop.Excel.Range range;
            foreach (DataColumn col in dataTable.Columns) {
                colIndex++;
                excel.Cells[1, colIndex] = col.ColumnName;
            }
            object[,] objData = new object[rowNumber, columnNumber];
            for (int r = 0; r < rowNumber; r++) {
                for (int c = 0; c < columnNumber; c++) {
                    objData[r, c] = dataTable.Rows[r][c];
                }
            }
            range= worksheet.Range[worksheet.Cells[2,1], worksheet.Cells[rowNumber + 1, columnNumber]]; //4.0版本以上
            // range = worksheet.get_Range(excel.Cells[2, 1], excel.Cells[rowNumber + 1, columnNumber]); //如果出现没有找到get_Range定义是因为版本不同，使用上面的就可以啦
            range.Value = objData;
            worksheet.SaveAs(filePath, Type.Missing, Type.Missing, Type.Missing, Type.Missing,Type.Missing,Type.Missing, Type.Missing, Type.Missing, Type.Missing);
            //excel.Quit();
            return true;
        }