I would like to check if my gridview is empty and show the link and label but it doesn't work

protected void BtnCheck_Click(object sender, EventArgs e)
        {
            if (GridView1.Rows.Count ==0)
            {
                Label1.Visible = true;
                Label1.Text = "CLICK NEW EMPLOYEE TO REGISTER PLEASE!!";
                HyperLink1.Visible = true;
            }
            else
            {
                SqlDataAdapter da = new SqlDataAdapter("select empno,Namee from employee where Namee='" + TextBox1.Text + "'", con);
                DataSet ds = new DataSet();
                da.Fill(ds, "employee");
                DataView dv = new DataView(ds.Tables["employee"]);
                GridView1.DataSource = dv;
                GridView1.DataBind();                
            }
            
            
        }