#region DataGridView导出到Excel，有一定的判断性
        /// <summary>    
        ///方法，导出DataGridView中的数据到Excel文件    
        /// </summary>     
        /// <remarks>   
        /// add com "Microsoft Excel 11.0 Object Library"   
        /// using Excel=Microsoft.Office.Interop.Excel;   
        /// using System.Reflection;   
        /// </remarks>   
        /// <param name= "dgv"> DataGridView </param>    
        public void DataGridViewToExcel(DataGridView dgv)
        {


            #region   验证可操作性

            //申明保存对话框    
            SaveFileDialog dlg = new SaveFileDialog();
            //默然文件后缀    
            dlg.DefaultExt = "xls ";
            //文件后缀列表    
            dlg.Filter = "EXCEL文件(*.XLS)|*.xls ";
            //默然路径是系统当前路径    
            dlg.InitialDirectory = Directory.GetCurrentDirectory();
            //打开保存对话框    
            if (dlg.ShowDialog() == DialogResult.Cancel) return;
            //返回文件路径    
            string fileNameString = dlg.FileName;
            //验证strFileName是否为空或值无效    
            if (fileNameString.Trim() == " ")
            { return; }
            //定义表格内数据的行数和列数    
            int rowscount = dgv.Rows.Count;
            int colscount = dgv.Columns.Count;
            //行数必须大于0    
            if (rowscount <= 0)
            {
                MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            //列数必须大于0    
            if (colscount <= 0)
            {
                MessageBox.Show("没有数据可供保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            //行数不可以大于65536    
            if (rowscount > 65536)
            {
                MessageBox.Show("数据记录数太多(最多不能超过65536条)，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            //列数不可以大于255    
            if (colscount > 255)
            {
                MessageBox.Show("数据记录行数太多，不能保存 ", "提示 ", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            //验证以fileNameString命名的文件是否存在，如果存在删除它    
            FileInfo file = new FileInfo(fileNameString);
            if (file.Exists)
            {
                try
                {
                    file.Delete();
                }
                catch (Exception error)
                {
                    MessageBox.Show(error.Message, "删除失败 ", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                    return;
                }
            }
            #endregion
            Microsoft.Office.Interop.Excel.Application objExcel = null;
            Microsoft.Office.Interop.Excel.Workbook objWorkbook = null;
            Microsoft.Office.Interop.Excel.Worksheet objsheet = null;
            try
            {
                //申明对象    
                objExcel = new Microsoft.Office.Interop.Excel.Application();
                objWorkbook = objExcel.Workbooks.Add(Missing.Value);
                objsheet = (Microsoft.Office.Interop.Excel.Worksheet)objWorkbook.ActiveSheet;
                //设置EXCEL不可见    
                objExcel.Visible = false;

                dgv.Columns[0].Visible = false;
                dgv.Columns[1].Visible = false;


                //向Excel中写入表格的表头    
                int displayColumnsCount = 1;
                string[] HeaderText = {"铲板号","箱号","工程号","产品名称","Code","YN","版本号","扫描时间","员工"};
                for (int i = 0; i <= dgv.ColumnCount - 1; i++)