The multi-part identifier "System.Data.DataRowView" could not be bound.

using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace DiscntdRtrvng
{
    public partial class DiscntdRtrvng : Form
    {
        SqlConnection con = new SqlConnection("server=.;user id=sa;password=123;database=Seed_Employee");
        SqlCommand cmd;
        DataSet ds;
        SqlDataAdapter da;
        string s;
        public DiscntdRtrvng()
        {
            InitializeComponent();
        }

        private void DiscntdRtrvng_Load(object sender, EventArgs e)
        {
            s = "select EmpId from Employee";
            da = new SqlDataAdapter(s, con);

            ds = new DataSet();
            da.Fill(ds, "emp");
           // DataRow row = ds.Tables[0].Rows[0];

            cbxEid.DataSource = ds.Tables[0];
            cbxEid.DisplayMember = "EmpId";
           //dataGridView1.DataSource = ds.Tables[0];
            
        }

        private void cbxEid_SelectedIndexChanged(object sender, EventArgs e)
        {
            s = "select * from Employee where EmpId=" + cbxEid.SelectedItem.ToString();
            da = new SqlDataAdapter(s, con);
            ds = new DataSet();
            da.Fill(ds, "emp");
            dataGridView1.DataSource = ds.Tables[0];
        }
    }
}