Wpf Combobox in Master/Detail MVVM
- by isak
I have MVVM master /details like this:
<Window.Resources>
<DataTemplate DataType="{x:Type model:EveryDay}">
<views:EveryDayView/>
</DataTemplate>
<DataTemplate DataType="{x:Type model:EveryMonth}">
<views:EveryMonthView/>
</DataTemplate>
</Window.Resources>
<Grid>
<ListBox Margin="12,24,0,35" Name="schedules"
IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding Path=Elements}"
SelectedItem="{Binding Path=CurrentElement}"
DisplayMemberPath="Name" HorizontalAlignment="Left" Width="120"/>
<ContentControl Margin="168,86,32,35" Name="contentControl1"
Content="{Binding Path=CurrentElement.Schedule}" />
<ComboBox Height="23" Margin="188,24,51,0" Name="comboBox1" VerticalAlignment="Top"
IsSynchronizedWithCurrentItem="True"
ItemsSource="{Binding Path=Schedules}"
SelectedItem="{Binding Path=CurrentElement.Schedule}"
DisplayMemberPath="Name"
SelectedValuePath="ID"
SelectedValue="{Binding Path=CurrentElement.Schedule.ID}"
/>
</Grid>
This Window has DataContext class:
public class MainViewModel : INotifyPropertyChanged
{
public MainViewModel()
{
_elements.Add(new Element("first", new EveryDay("First EveryDay object")));
_elements.Add(new Element("second", new EveryMonth("Every Month object")));
_elements.Add(new Element("third", new EveryDay("Second EveryDay object")));
_schedules.Add(new EveryDay());
_schedules.Add(new EveryMonth());
}
private ObservableCollection<ScheduleBase> _schedules = new ObservableCollection<ScheduleBase>();
public ObservableCollection<ScheduleBase> Schedules
{
get
{
return _schedules;
}
set
{
_schedules = value;
this.OnPropertyChanged("Schedules");
}
}
private Element _currentElement = null;
public Element CurrentElement
{
get
{
return this._currentElement;
}
set
{
this._currentElement = value;
this.OnPropertyChanged("CurrentElement");
}
}
private ObservableCollection<Element> _elements = new ObservableCollection<Element>();
public ObservableCollection<Element> Elements
{
get
{
return _elements;
}
set
{
_elements = value;
this.OnPropertyChanged("Elements");
}
}
#region INotifyPropertyChanged Members
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(string propertyName)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
#endregion
}
One of Views:
<UserControl x:Class="Views.EveryDayView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
>
<Grid >
<GroupBox Header="Every Day Data" Name="groupBox1" VerticalAlignment="Top">
<Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<TextBox Name="textBox2" Text="{Binding Path=AnyDayData}" />
</Grid>
</GroupBox>
</Grid>
I have problem with SelectedItem in ComboBox.It doesn't works correctly.
