Question

I have a following XAML:

<ComboBox 
 Name="groupComboBox" 
 ItemsSource="{Binding Path=MyServiceMap.Groups}"
 DisplayMemberPath="{Binding Name}"/>

In the code behind i set this.DataContext to my viewModel.

private ServiceMap _serviceMap;
    public ServiceMap MyServiceMap
    {
        get
        {
            return _serviceMap;
        }
        set
        {
            _serviceMap = value;
            OnPropertyChanged("MyServiceMap");
        }
    }

My ServiceMap class is

public class ServiceMap
{
    //other code
    public List<Group> Groups = new List<Group>();
}

and finally:

public class Group
{
    public string Name { get; set; }
}

Unfortunately, this is not working. How can i bind combobox to show Group Name?

Answer 1

There are two problems with your code. First is bindings are only work on properties, so the binding couldn’t find the Group field. Change it to a property.

public class ServiceMap
{
    public List<Group> Groups { get; set; }
}

The second one is that the DisplayMemberPath waits for a string not a binding. Change it simply to “Name”.

<ComboBox Name="groupComboBox"
    ItemsSource="{Binding Path=MyServiceMap.Groups}"
    DisplayMemberPath="Name" />