Hi,
As stated in the documentation, "CheckComboBox.SelectedItems : Gets the collection of checked items."
This cannot be set.
As stated in the documentation, "CheckComboBox.SelectedItemsOverride : Gets or sets a custom IList of selected items."
This is a get/set property.
It lets you set the list of selectedItems, but will always be null if you don't set it.
What you want is to work the this property :
Get more controls, features, updates and technical support with Xceed Toolkit Plus for WPF
As stated in the documentation, "CheckComboBox.SelectedItems : Gets the collection of checked items."
This cannot be set.
As stated in the documentation, "CheckComboBox.SelectedItemsOverride : Gets or sets a custom IList of selected items."
This is a get/set property.
It lets you set the list of selectedItems, but will always be null if you don't set it.
What you want is to work the this property :
<StackPanel>
<xctk:CheckComboBox x:Name="UserGroupsCheckedComboBox"
ItemsSource="{Binding UserGroups}"
SelectedItemsOverride="{Binding SelectedUserGroups}"
DisplayMemberPath="Name"
ValueMemberPath="ID" />
<StackPanel Margin="0,200,0,0"
Orientation="Horizontal">
<TextBlock Text="SelectedItems : " />
<TextBlock Text="{Binding SelectedItemsOverride.Count, ElementName=UserGroupsCheckedComboBox}" />
</StackPanel>
</StackPanel> public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
this.UserGroups = new ObservableCollection<MyData>()
{
new MyData() { ID = 1, Name = "First" },
new MyData() { ID = 2, Name = "Second" },
new MyData() { ID = 3, Name = "Third" },
new MyData() { ID = 4, Name = "Fourth" },
new MyData() { ID = 5, Name = "Fifth" },
};
this.SelectedUserGroups = new ObservableCollection<MyData>() { this.UserGroups[ 2 ] };
this.DataContext = this;
}
public ObservableCollection<MyData> UserGroups
{
get;
set;
}
public ObservableCollection<MyData> SelectedUserGroups
{
get;
set;
}
}
public class MyData
{
public string Name
{
get;
set;
}
public int ID
{
get;
set;
}
}Get more controls, features, updates and technical support with Xceed Toolkit Plus for WPF