wpf combobox binding

Question

Hi I´m trying to bind a List<> to a combobox.

public OfferEdi         


        

Answer 1

Try setting the ItemsSource property with an actual Binding object

XAML Method (recommended):

<ComboBox
    ItemsSource="{Binding Customer}"
    SelectedValue="{Binding someViewModelProperty}"
    DisplayMemberPath="name"
    SelectedValuePath="customerID"/>

Programmatic method:

Binding myBinding = new Binding("Name");
myBinding.Source = cusmo.Customer; // data source from your example

customer.DisplayMemberPath = "name";
customer.SelectedValuePath = "customerID";
customer.SetBinding(ComboBox.ItemsSourceProperty, myBinding);

Also, the setter on your Customer property should raise the PropertyChanged event

public ObservableCollection<Customer> Customer
{
    get { return _customer; }
    set
    {
        _customer = value;
        RaisePropertyChanged("Customer");
    }
}

If the above does not work, try moving the binding portion from the constructor to the OnLoaded override method. When the page loads, it may be resetting your values.

Answer 2

As an expansion on Steve's answer,

You need to set the datacontext of your form.

Currently you have this:

InitializeComponent();
cusmo = new CustomerViewModel();
DataContext = this;

It should be changed to this:

InitializeComponent();
cusmo = new CustomerViewModel();
DataContext = cusmo;

Then as Steve noted you will need another property on the viewmodel to store the selected item.