|
TreeView как получить данные о Selected Item
#39391687
Ссылка:
Ссылка на сообщение:
Ссылка с названием темы:
|
|
|
|
Как определить какой из элементов пользователь выбрал. Т.е. мне надо получить ID элемента и его тип (ObjectTypes), чтобы знать с каким из объектов работает пользователь
Класс коллекции и DataTemplateSelector 1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
44.
45.
46.
47.
48.
49.
public class ConstructionViewModel
{
public int ID { get; set; }
public ObjectTypes ObjectType { get; set; }
public string Name { get; set; }
public ConstructionViewModel(int myID, ObjectTypes myType, string myName)
{
ID = myID;
ObjectType = myType;
Name = myName;
Members = new ObservableCollection<ConstructionViewModel>();
}
public ObservableCollection<ConstructionViewModel> Members { get; set; }
}
public enum ObjectTypes
{
ContructionObject = 1,
ContructionStructure = 2,
ActStructure = 4,
ActWork = 8
}
public class ConstructionObjectTemplateSelector : DataTemplateSelector
{
public DataTemplate ConstractionTemplate { get; set; }
public DataTemplate StructureTemplate { get; set; }
public DataTemplate ActStructureTemplate { get; set; }
public DataTemplate ActWorkTemplate { get; set; }
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
dynamic obj = (ConstructionViewModel)item;
switch (obj.ObjectType) {
case ObjectTypes.ContructionObject:
return ConstractionTemplate;
case ObjectTypes.ContructionStructure:
return StructureTemplate;
case ObjectTypes.ActStructure:
return ActStructureTemplate;
case ObjectTypes.ActWork:
return ActWorkTemplate;
default:
return null;
}
}
}
Набор данных и привязка
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
ObservableCollection<ConstructionViewModel> myObjects = new ObservableCollection<ConstructionViewModel>();
ConstructionViewModel act1 = new ConstructionViewModel(1, 8, "Act 1");
ConstructionViewModel act2 = new ConstructionViewModel(2, 8, "Act 2");
ConstructionViewModel act3 = new ConstructionViewModel(3, 8, "Act 3");
ConstructionViewModel act4 = new ConstructionViewModel(4, 4, "Act 4");
ConstructionViewModel structure1 = new ConstructionViewModel(1, 2, "Structure 1");
ConstructionViewModel structure2 = new ConstructionViewModel(2, 2, "Structure 2");
ConstructionViewModel subStructure1 = new ConstructionViewModel(3, 2, "Sub Structure 1");
ConstructionViewModel subStructure2 = new ConstructionViewModel(4, 2, "Sub Structure 2");
ConstructionViewModel subStructure3 = new ConstructionViewModel(5, 2, "Sub Structure 3");
ConstructionViewModel subStructure4 = new ConstructionViewModel(6, 2, "Sub Structure 4");
ConstructionViewModel construction1 = new ConstructionViewModel(1, 1, "Construction 1");
ConstructionViewModel construction2 = new ConstructionViewModel(2, 1, "Construction 2");
subStructure4.Members.Add(act1);
subStructure4.Members.Add(act2);
subStructure4.Members.Add(act4);
subStructure3.Members.Add(subStructure4);
subStructure1.Members.Add(subStructure2);
subStructure1.Members.Add(subStructure3);
structure1.Members.Add(subStructure1);
structure2.Members.Add(act3);
construction1.Members.Add(structure1);
construction1.Members.Add(structure2);
myObjects.Add(construction1);
myObjects.Add(construction2);
treeObjects.ItemsSource = myObjects;
XAML 1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
<Window.Resources>
<HierarchicalDataTemplate x:Key="constractionTemplate" ItemsSource="{Binding Members}">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Name}" />
<TextBlock Text=" [" Foreground="Blue" />
<TextBlock Text="{Binding Members.Count}" Foreground="Blue" />
<TextBlock Text="]" Foreground="Blue" />
</StackPanel>
</HierarchicalDataTemplate>
<HierarchicalDataTemplate x:Key="structureTemplate" ItemsSource="{Binding Members}">
<TextBlock Text="{Binding Name}"/>
</HierarchicalDataTemplate>
<DataTemplate x:Key="actStructureTemplate">
<TextBlock Text="{Binding Name}" Foreground="DarkGreen"/>
</DataTemplate>
<DataTemplate x:Key="actWorkTemplate">
<TextBlock Text="{Binding Name}" Foreground="DarkMagenta"/>
</DataTemplate>
<local:ConstructionObjectTemplateSelector x:Key="ConstructionObjectTemplateSelector"
ConstractionTemplate="{StaticResource constractionTemplate}"
StructureTemplate="{StaticResource structureTemplate}"
ActStructureTemplate="{StaticResource actStructureTemplate}"
ActWorkTemplate="{StaticResource actWorkTemplate}" />
</Window.Resources>
<Grid>
<TreeView x:Name="treeObjects" ItemTemplateSelector="{StaticResource ConstructionObjectTemplateSelector}" />
</Grid>
|
|
|
