Problem with Binding

[George Bill]

Hello,

I've already created a topic in this forum, and I need your help once again.
I work with the same configuration (it's the same application) : Telerik + MS Prism
Link : Close tabs - RadTabControl + Prism

I have a problem with the Binding and RadTabControl.
I have a button to add a RadTabItem in my RadTabControl, and the content of the RadTabItem work with a ContentTemplate.
The content is a form with some TextBox and each textbox has a Binding with an Object in my Model.

CODE :
So, here the XAML code of my RadTabControl :

<telerik:RadTabControl Name="RadTabControlAddress" SelectionChanged="RadTabControlAddress_SelectionChanged">
                    <telerik:RadTabControl.ItemContainerStyle>
                        <Style TargetType="{x:Type telerik:RadTabItem}">
                            <Setter Property="ContentTemplate">
                                <Setter.Value>
                                    <DataTemplate>
                                        <Grid Name="Grid">
                                            <Grid.ColumnDefinitions>
                                                <ColumnDefinition Width="100" />
                                                <ColumnDefinition Width="*"/>
                                            </Grid.ColumnDefinitions>
                                            <Grid.RowDefinitions>
                                                <RowDefinition />
                                            </Grid.RowDefinitions>
                                            <TextBlock Text="{Loc address1}" Grid.Row="0" Grid.Column="0"></TextBlock>
                                            <TextBox Grid.Row="0"  Grid.Column="1" Text="{Binding Adresse.Adresse1 }" Height="30" Margin="5"></TextBox>
                                        </Grid>
                                    </DataTemplate>
                                </Setter.Value>
                            </Setter>
                        </Style>
                    </telerik:RadTabControl.ItemContainerStyle>

                </telerik:RadTabControl>

(I deleted some field for a short version)

I have a simple RadButton with this event :

private void AddAddressTab()
        {
            _model.AddAddress();
            RadTabItem itemToAdd = new RadTabItem()
            {
                Header = "New Tab"
            };
            RadTabControlAddress.Items.Add(itemToAdd);
            RadTabControlAddress.SelectedIndex = RadTabControlAddress.Items.Count - 1;
        }

The constructor in my XAML.cs is :

public AjouterView(AjouterViewModel model)
        {
            InitializeComponent();
            // Sauvegarde du model dans un attribut de la classe.
            _model = model;
            // On se sert de notre model en tant que DataContext.
            this.DataContext = model;

            //AddAddressTab();
        }

In my Model I have two attribute :

private IAdresse _adresse = null;
        public IAdresse Adresse
        {
            get { return _adresse; }
            set
            {
                _adresse = value;
                OnPropertyChanged("Adresse");
            }
        }

My Model implement INotifyPropertyChanged - (And sorry for french name...)

The AddAddress() Method (in the model) :

public void AddAddress()
        {
            IAdresse address = new Adresse("Just a test");
            ListAdresse.Add(address);
            Adresse = address;
        }

I not include the system to change the address when we select an other Tab.

PROBLEM :
The first time we add an address (add a Tab in the TabControl), the binding doesn't work. I need to add two address for work. I don't find why ! The binding work only if I click the Button (to add an other address) if there is already a Tab in the TabControl.

ATTACHED FILE :
You can download a demo here : Download

If you need more informations, please tell me.
Thank you in advance for your answer.

Regards,
G.B.

[EDIT] : Nobody shall have the beginning of solution ? I don't find how to fix this problem !

[Viktor Tsvetkov]

Hello George Bill,

Thank you for contacting us. Attached you can find a modified version of your project. Could you please have a look at it and let me know how it works for you. I'd be glad to further assist you.

Greetings,
Viktor Tsvetkov
the Telerik team

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[George Bill]

Hello,

It's perfect,  thank you !
I learnt WPF a few months ago and some techniques are not evident for me. So thanks again for this reply.
I also had think to use ItemSource but I had not used it correctly.
Now the code is simpler.

(I mark your Reply as Answer)

Thanks Telerik Team and Best Regards,
Telerik rocks,
B.G.