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我想从我的新访问我的项目ObservableCollection，我的实际DataTemplate有什么问题？如何从DataTemplate访问ObservableCollection
还有就是我的XAML：
<Window x:Class="Data.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:Data"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<!-- Icon template style -->
<DataTemplate x:Key="iconTemplate">
<ListView ItemsSource="{Binding Items}">
<ListView.ItemTemplate>
<DataTemplate>
<DockPanel>
<TextBlock DockPanel.Dock="Bottom" Text="{Binding Name}"/>
<Rectangle Height="32" Width="32" Fill="Blue"/>
</DockPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</DataTemplate>
<!-- Detailed list style-->
<DataTemplate x:Key="listTemplate">
</DataTemplate>
<Style x:Key="selectableContentStyle" TargetType="{x:Type ContentControl}">
<Style.Triggers>
<DataTrigger Binding="{Binding Path=TTemplate}" Value="Icon">
<Setter Property="ContentTemplate" Value="{StaticResource iconTemplate}" />
</DataTrigger>
<DataTrigger Binding="{Binding Path=TTemplate}" Value="List">
<Setter Property="ContentTemplate" Value="{StaticResource listTemplate}" />
</DataTrigger>
<!-- Other listview styles -->
</Style.Triggers>
</Style>
</Window.Resources>
<Grid>
<StackPanel>
<Button Command="{Binding ChangeView}">Change</Button>
</StackPanel>
<ContentControl Style="{StaticResource selectableContentStyle}" Margin="112,66,189.4,84.8"/>
</Grid>
</Window>
我的视图模型：
public class Model
{
public String Name { get; set; }
public Int32 Length { get; set; }
public BitmapSource Image { get; set; }
}
public enum TestTemplate
{
Icon,
List
}
public class ViewModelBase : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
protected void NotifyPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}
public class RelayCommand : ICommand
{
public RelayCommand(Action<object> execute)
: this(execute, null)
{
}
public RelayCommand(Action<object> execute, Predicate<object> canExecute)
{
if (execute == null)
throw new ArgumentNullException("execute");
_execute = execute;
_canExecute = canExecute;
}
public bool CanExecute(object parameter)
{
return _canExecute == null ? true : _canExecute(parameter);
}
public event EventHandler CanExecuteChanged
{
add { CommandManager.RequerySuggested += value; }
remove { CommandManager.RequerySuggested -= value; }
}
public void Execute(object parameter)
{
_execute(parameter);
}
private readonly Action<object> _execute;
private readonly Predicate<object> _canExecute;
}
public class ViewModel : ViewModelBase
{
#region FIELDS
#endregion
#region PROPERTIES
private TestTemplate template;
public TestTemplate TTemplate
{
get
{
return this.template;
}
set
{
this.template = value;
this.NotifyPropertyChanged("TTemplate");
}
}
public ICommand ChangeView { get; set; }
public ObservableCollection<Model> Items
{
get
{
return this.items;
}
set
{
this.items = value;
this.NotifyPropertyChanged("Items");
}
}
private ObservableCollection<Model> items;
#endregion
#region CONSTRUCTORS
/// <summary>
/// Creates a new ViewModel instance
/// </summary>
public ViewModel()
{
this.TTemplate = TestTemplate.Icon;
this.ChangeView = new RelayCommand((param) => this.ChangeViewAction(param));
this.Items = new ObservableCollection<Model>();
this.Items.Add(new Model()
{
Name = "test",
Length = 1
});
this.Items.Add(new Model()
{
Name = "test2",
Length = 2
});
}
#endregion
#region METHODS
private void ChangeViewAction(Object param)
{
if (this.TTemplate == TestTemplate.Icon)
{
this.TTemplate = TestTemplate.List;
}
else
{
this.TTemplate = TestTemplate.Icon;
}
}
#endregion
}
你可以用代码中看到的，我创建的意见为一个ListView。一个带有图标和文字，另一个带有一些细节（尚未完成）。
你能帮我吗？
谢谢
发表您的视图模型也.. –
哦，我忘了......还有，我编辑自己的帖子。 – Eastrall
在输出窗口中是否收到任何绑定错误？ –