เอา Code ASP.Net มาฝาก GridView inside DataList (GridView ใน DataList) ^^

 <asp:DataList ID="DataList1" runat="server" onitemdatabound="DataList1_ItemDataBound" DataKeyField="car_id">
        <ItemTemplate>
            <table style="width:100%;">
                <tr>
                    <td>
                        <asp:Label ID="Label1" runat="server" Text='<%# Bind("car_name") %>'></asp:Label>
                    </td>
                    <td>
                        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="car_id">
                             <Columns>
                             <asp:TemplateField HeaderText="เลขที่ใบจอง" >
		                        <ItemTemplate>
			                        <asp:Label id="lblbooking_id" runat="server"  Text='<%# Bind("car_id") %>'></asp:Label>
		                        </ItemTemplate>	    
	                         </asp:TemplateField>
                            </Columns>
                        </asp:GridView>
                    </td>
                </tr>
            </table>
        </ItemTemplate>
    </asp:DataList>

public partial class admin_Default3 : System.Web.UI.Page
{
    MySqlConnection objConn;
    MySqlCommand objCmd;
    String strSQL;
    protected void Page_Load(object sender, EventArgs e)
    {
        String strConnString;
        strConnString = "Server=localhost;User Id=root; Password=1234; Database=car-system; Pooling=false;Persist Security Info=True;Convert Zero Datetime=True ";
        objConn = new MySqlConnection(strConnString);
        objConn.Open();

        if (!Page.IsPostBack)
        {
            BindDatacar();
        }
    }


    protected void BindDatacar()
    {
        String strSQL = "select * from car";
        MySqlDataAdapter da = new MySqlDataAdapter(strSQL, objConn); 
          DataTable dt = new DataTable(); 
          da.Fill(dt); 
          DataList1.DataSource = dt; 
          DataList1.DataBind(); 

        
    }

    private void BindGrid(GridView GridView, string car_id) 
    {
        string sql = "Select * from booking where car_id=" + car_id + " ";

      MySqlDataAdapter da = new MySqlDataAdapter(sql, objConn); 
      DataTable dt = new DataTable(); 
      da.Fill(dt); 
  
      GridView.DataSource = dt; 
      GridView.DataBind(); 
    }


   
    protected void DataList1_ItemDataBound(object sender, DataListItemEventArgs e)
    {
        GridView GridView1 = (GridView)e.Item.FindControl("GridView1");
        BindGrid(GridView1, DataList1.DataKeys[e.Item.ItemIndex].ToString()); 
    }
}