DataTemplate綁定不起作用？

我寫了下面的代碼綁定某些屬性DataTemplate綁定不起作用？

<StackPanel x:Name="channelsRecordTimeData" Orientation="Vertical"> 
    <ItemsControl x:Name="channelRecordTimeItems" ItemsSource="{Binding}"> 
     <ItemsControl.ItemTemplate> 
      <DataTemplate> 
       <Grid x:Name="gridChannelRecordTimeItem" Width="{Binding Path=ChannelRecordTimeItemWidth}"                             
         Height="{Binding Path=ChannelRecordTimeItemHeight}" Margin="{Binding Path=ChannelRecordTimeItemsMargin}" 
         HorizontalAlignment="Left" DataContext="{Binding Path=ListRecordTime}"> 
        <Grid.Background> 
         <ImageBrush x:Name="gridChannelRecordTimeItemBgr" ImageSource="..\Resources\playback_grid_channel_record_time_item_bgr_normal.png"/> 
        </Grid.Background>          
       </Grid> 
      </DataTemplate> 
     </ItemsControl.ItemTemplate> 
    </ItemsControl> 
</StackPanel> 

public class DATA 
{ 
    public double ChannelRecordTimeItemWidth { set; get; } 
    public double ChannelRecordTimeItemHeight { set; get; } 
    public Thickness ChannelRecordTimeItemsMargin { set; get; } 
    public List<RecordTime> ListRecordTime { set; get; } 

    public DATA() 
    { 
     ChannelRecordTimeItemWidth = 1000; 
     ChannelRecordTimeItemHeight = 20; 
     ChannelRecordTimeItemsMargin = new System.Windows.Thickness(0, 0, 0, 0); 
     ListRecordTime = null; 
    } 
} 

public static List<DATA> listDATA = new List<DATA>(); 
for(int i = 0 ; i < 10 ; i++) 
{ 
    DATA data = new DATA(); 
    listDATA.Add(data); 
} 
channelRecordTimeItems.ItemsSource = listDATA; 
channelRecordTimeItems.Items.Refresh();

在上面的代碼，我在StackPanel中添加10個項目，但我沒有看到運行的應用程序時，任何項目加入。但是，當我用Width="1000"代替Width="{Binding Path=ChannelRecordTimeItemWidth}"並用Height="20"代替Height="{Binding Path=ChannelRecordTimeItemHeight}"時，那麼它工作的很好！

我想，這是綁定的問題，但我不知道爲什麼。

有人可以告訴我如何使它工作？

非常感謝，

牛逼&牛逼

來源

2013-12-11 TTGroup

更新您的DATA類來實現INotifyPropertyChanged像這樣：

public class DATA : : INotifyPropertyChanged 
{ 
    private double _channelRecordTimeItemWidth; 
    private double _channelRecordTimeItemHeight; 
    private Thickness _channelRecordTimeItemsMargin; 
    private List<RecordTime> _listRecordTime; 

    public double ChannelRecordTimeItemWidth 
    { 
     get { return _channelRecordTimeItemWidth; } 
     set 
     { 
      _channelRecordTimeItemWidth = value; 
      OnPropertyChanged("ChannelRecordTimeItemWidth"); 
     } 
    } 

    public double ChannelRecordTimeItemHeight 
    { 
     get { return _channelRecordTimeItemHeight; } 
     set 
     { 
      _channelRecordTimeItemHeight = value; 
      OnPropertyChanged("ChannelRecordTimeItemHeight"); 
     } 
    } 

    public Thickness ChannelRecordTimeItemsMargin 
    { 
     get { return _channelRecordTimeItemsMargin; } 
     set 
     { 
      _channelRecordTimeItemsMargin = value; 
      OnPropertyChanged("ChannelRecordTimeItemsMargin"); 
     } 
    } 

    public List<RecordTime> ListRecordTime 
    { 
     get { return _listRecordTime; } 
     set 
     { 
      _listRecordTime = value; 
      OnPropertyChanged("ListRecordTime"); 
     } 
    } 

    public DATA() 
    { 
     ChannelRecordTimeItemWidth = 1000; 
     ChannelRecordTimeItemHeight = 20; 
     ChannelRecordTimeItemsMargin = new System.Windows.Thickness(0, 0, 0, 0); 
     ListRecordTime = null; 
    } 

    public event PropertyChangedEventHandler PropertyChanged; 
    protected virtual void OnPropertyChanged(string propertyName) 
    { 
     PropertyChangedEventHandler handler = PropertyChanged; 
     if (handler != null) handler(this, new PropertyChangedEventArgs(propertyName)); 
    } 
}

這將通知XAML來更新界值。

DataContext也應正確設置。首先拆下Grid的約束DataContext：

<DataTemplate> 
     <Grid x:Name="gridChannelRecordTimeItem" Width="{Binding Path=ChannelRecordTimeItemWidth}"                             
       Height="{Binding Path=ChannelRecordTimeItemHeight}" Margin="{Binding Path=ChannelRecordTimeItemsMargin}" 
       HorizontalAlignment="Left"> 
      <Grid.Background> 
       <ImageBrush x:Name="gridChannelRecordTimeItemBgr" ImageSource="..\Resources\playback_grid_channel_record_time_item_bgr_normal.png"/> 
      </Grid.Background>          
     </Grid> 
    </DataTemplate>

，並確保對XAML的DataContext（無論是用戶控件，窗口等），設置爲您DATA類。

來源

2013-12-11 06:02:11

這對解決我的問題，並展示了我如何使用INotifyPropertyChanged接口非常酷。非常感謝你！ – TTGroup

我提出的另一個問題 http://stackoverflow.com/questions/20515233/how-to-notify-xaml-properties-when-list-data-of-binding-changed 你能看到它嗎？謝謝！ – TTGroup

您的解決方案不能因爲這一行

DataContext="{Binding Path=ListRecordTime}"

該行設置的datacontext網格的工作，那麼你正試圖從DataContext的得到ChannelRecordTimeItemHeight - recordtimes的名單。

刪除此行，看看會發生什麼

來源

2013-12-11 06:05:40

它的工作！謝謝！ – TTGroup

DataTemplate綁定不起作用？

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