我正在研究MVVM模式和TreeView .
我无法将数据模型与视图绑定 . 这是我目前的代码:
MainWindow.xaml:
xmlns:reptile="clr-namespace:Terrario.Models.Reptile"
...
<TreeView x:Name="TrvFamily" Grid.Row="1" Grid.Column="0" ItemsSource="{Binding }">
<TreeView.ItemTemplate>
<HierarchicalDataTemplate DataType="{x:Type reptile:Family}" ItemsSource="{Binding Items}">
<TextBlock Text="{Binding Name}" />
</HierarchicalDataTemplate>
</TreeView.ItemTemplate>
</TreeView>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
LoadFamily();
}
MainWindow.xaml.cs:
private void LoadFamily()
{
FamilyVM familiesVM = new FamilyVM();
familiesVM.Load();
TrvFamily.DataContext = familiesVM;
}
}
的ViewModels \ FamilyVM:
class FamilyVM
{
public ObservableCollection<Family> Families { get; set; }
public void Load()
{
ObservableCollection<Family> families = new ObservableCollection<Family>();
families.Add(new Family { ID = 1, Name = "Amphibian" });
families.Add(new Family { ID = 2, Name = "Viperidae" });
families.Add(new Family { ID = 3, Name = "Aranae" });
Families = families;
}
}
型号\ Family.cs
class Family
{
public int ID { get; set; }
public string Name { get; set; }
}
TreeView仍然是白色的,就像没有数据一样 .
希望你有问题;)
谢谢你的提前
1 回答
您绑定到FamilyVM的实例而不是Families . 那没有Name属性,所以你什么也得不到 .
您还应始终在任何视图模型上实现inotifypropertychanged . 否则你会得到内存泄漏 .
你家里没有孩子收藏 .
通常将inotifypropertychanged的东西放在你继承viewmodels的基类中 .