public static void ExportExcel(DataGridView myDGV, string fileName)

        {

            string saveFileName = fileName;

            //SaveFileDialog saveDialog = new SaveFileDialog();

            //saveDialog.DefaultExt = "xls";

            //saveDialog.Filter = "Excel文件|*.xls";

            //saveDialog.FileName = fileName;

            //saveDialog.ShowDialog();

            //saveFileName = saveDialog.FileName;

            if (saveFileName.IndexOf(":") < ) return; //被点了取消

            Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();

            if (xlApp == null)

            {

                MessageBox.Show("无法创建Excel对象，可能您的机子未安装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[];//取得sheet1

            //写入标题

            for (int i = ; i < myDGV.ColumnCount; i++)

            {

                worksheet.Cells[, i + ] = myDGV.Columns[i].HeaderText;

            }

            //写入数值

            for (int r = ; r < myDGV.Rows.Count; r++)

            {

                for (int i = ; i < myDGV.ColumnCount; i++)

                {

                    worksheet.Cells[r + , i + ] = myDGV.Rows[r].Cells[i].Value;

                }

                System.Windows.Forms.Application.DoEvents();

            }

            worksheet.Columns.EntireColumn.AutoFit();//列宽自适应

            if (saveFileName != "")

            {

                try

                {

                    workbook.Saved = true;

                    workbook.SaveCopyAs(saveFileName);

                }

                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

            MessageBox.Show("文件： " + fileName + ".xls 保存成功", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);

        }