private void GridFill()
 {
     dt = TheatresLogicLayer.GetAllTheatresDetials();
     GridView1.DataSource = dt;
     GridView1.DataBind();
     ddlCity.DataSource     = CityLogicLayer.GetAllCitySelect();
     ddlCity.DataTextField  = "CityName";
     ddlCity.DataValueField = "CityId";
     ddlCity.DataBind();
 }
    protected void BtnSearch_Click(object sender, EventArgs e)
    {
        dt = TheatresLogicLayer.GetAllTheatresDetials();
        DataView Dv1 = new DataView(dt);

        Dv1.RowFilter        = "TheatresName LIKE '" + txtSearchbox.Text + "*'";
        dt                   = Dv1.ToTable();
        GridView1.DataSource = Dv1.ToTable();
        GridView1.DataBind();
    }