excel 表中的数据加载到datagriedview 中

 /// <summary>
        /// 获取excel数据到datagriedview
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button5_Click(object sender, EventArgs e)
        {
            //打开一个文件选择框
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Title = "Excel文件";
            ofd.FileName = "";
            ofd.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);//为了获取特定的系统文件夹，可以使用System.Environment类的静态方法GetFolderPath()。该方法接受一个Environment.SpecialFolder枚举，其中可以定义要返回路径的哪个系统目录
            ofd.Filter = "Excel文件(*.xls)|*.xls";
            ofd.ValidateNames = true;     //文件有效性验证ValidateNames，验证用户输入是否是一个有效的Windows文件名
            ofd.CheckFileExists = true;  //验证路径有效性
            ofd.CheckPathExists = true; //验证文件有效性

            string strName = string.Empty;
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                strName = ofd.FileName;
            }

            if (strName == "")
            {
                MessageBox.Show("没有选择Excel文件！无法进行数据导入");
                return;
            }
            //调用导入数据方法
            EcxelToDataGridView(strName, this.hpGridView1);

        }
        /// <summary>
        /// Excel数据导入方法
        /// 作者:lhxhappy
        /// </summary>
        /// <param name="filePath"></param>
        /// <param name="dgv"></param>
        public void EcxelToDataGridView(string filePath, DataGridView dgv)
        {

            //根据路径打开一个Excel文件并将数据填充到DataSet中
            string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source = " + filePath + ";Extended Properties ='Excel 8.0;HDR=YES;IMEX=2'";//导入时包含Excel中的第一行数据，并且将数字和字符混合的单元格视为文本进行导入
            OleDbConnection conn = new OleDbConnection(strConn);
            conn.Open();
            string strExcel = "";
            OleDbDataAdapter myCommand = null;
            DataSet ds = null;
            strExcel = "select  * from [sheet1$]";
            myCommand = new OleDbDataAdapter(strExcel, strConn);
            ds = new DataSet();
            myCommand.Fill(ds, "table1");
            ds.Tables[0].Columns.Add("状态");

            //  DataRow row = new DataRow();

            //绑定数据源
            dgv.DataSource = ds.Tables[0];
            foreach (DataGridViewRow row in dgv.Rows)
            {
                row.Cells[0].Value = 1;
            }

        }