//下面代码是基于窗体button来做的，如果使用需要转为控制台
private void btnOpen_Click(object sender, EventArgs e)
        {
            DataSet myds = new DataSet();
            OpenFileDialog openFiledialog1 = new OpenFileDialog();
            openFiledialog1.Filter = @"Microsoft Excel 2007 文件(*.xlsx)|*.xlsx|Microsoft Excel 97/2000/XP/2003 文件(*.xls)|*.xls";//打开2003或者2007Excel文件
            openFiledialog1.ShowDialog();
            txt_Path.Text = openFiledialog1.FileName;
            if (txt_Path.Text != "")
            {
                myds = GetDataSet(txt_Path.Text);//将Excel数据读取并转换为DataSet  
                dgvData.DataSource = myds.Tables[0];//将数据绑定到DataGridView 

                //int numb=5;
                int numb = this.dgvData.Rows.Count;
                for (int i = 0; i < numb;i++ )
                {
                    comboBox1.Items.Add(this.dgvData.Rows[i].Cells[(0)].Value);

                }
            }