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26.01.2017, 00:25
#39391687
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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.
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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
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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;
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<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>
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