In WPF, how to bind the ItemSource and SelectedItem with String in ComboBox?

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In XAML:

HTML

<ComboBox x:Uid="ComboBox_1" ItemsSource="{Binding Path=Companies}" SelectedItem="{Binding Path=Company}"/>

In ViewModel:
public ObservableCollection<string> Companies { get; private set; }
public string Company{ get; private set; }

And I will add the single Company to Companies list in ViewModel constructor

But it doesn't work

the whole XAML will crash.

Not sure why....

Posted 24-Jul-13 19:48pm

allen_liu

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stibee · Answer 1 · 2013-07-24T20:43:00

1. The SelectedItem where you bind should not have a private set.

Sample Solution:

ViewModel:

XML

public class CMainWindowViewModel
 {
     public ObservableCollection<string> Companies { get; private set; }


     public string Company { get;  set; }


     public CMainWindowViewModel()
     {
         Companies = new ObservableCollection<string>();
         Companies.Add("TestString");
     }
 }

Sample View:

XML

<Grid>
    <ComboBox x:Uid="ComboBox_1" ItemsSource="{Binding Path=Companies}" SelectedItem="{Binding Path=Company}"/>
</Grid>