Binding Objects

[jerome.avoustin]

Hi All !

I got some pbs with binding objects in ASP.Net 2.0
I've got such an object composition :

class Person
{
public string Name { get; set; }
public int Age { get; set; }
public Car Car { get; set; }
}

class Car
{
public string Type { get; set; }
public string Color { get; set; }
}

I build a List<Person> and try to bind it to a GridView
Here's my GridView :

<asp:GridView ID="gdvTest" runat="server" AutoGenerateColumns="false">
<Columns>
<asp:BoundField HeaderText="Name" DataField="Name"/>
<asp:BoundField HeaderText="Age" DataField="Age"/>
</Columns>
</asp:GridView>

Then I try to bind values from the car
I try either this... :

<asp:BoundField HeaderText="Car Type" DataField="Car.Type"/>

.... Or this :

<asp:TemplateField HeaderText="Car Type">
<ItemTemplate>
<%# DataBinder.Eval(Container, "Car.Type") %>
Or
<%# DataBinder.Eval(Container,
"Personne.Car.Type") %>
</ItemTemplate>
</asp:TemplateField>

I always get an exception :

Impossible to find a fiels or a propertie 'Car.Type' in the datasource
or
DataBinding : 'System.Web.UI.WebControls.GridViewRow' has no propertie
calld 'Car'. (traduction from french)

Has someone any idea ?

Thanx !

 

[jerome.avoustin]

It's OK !!
I've found the error !

You must use :

<asp:TemplateField HeaderText="Car Type">
<ItemTemplate>
<%# DataBinder.Eval(Container.DataItem,
"Car.Type") %>
</ItemTemplate>
</asp:TemplateField>

I've forgotten .DataItem with Container !
But in the FRENCH documentation, it is said :

"For any of the list Web controls, such as DataGrid, DataList, or
Repeater, container should be Container.DataItem."

And nothing about GridView !
But in the english documentation, GridView is mentionned !

Allright... I'll always read english documentation next times !

Thanx