如何設置文本框與DependencyProperty的綁定

Question

我有一個DataGrid和一個TextBox的自定義UserControl，我試圖使用DependencyProperties將這些元素綁定到數據綁定。該綁定適用於DataGrid，但不適用於TextBox。

代碼：

public static readonly DependencyProperty BuiDataProperty = DependencyProperty.Register("BuiData", typeof(IEnumerable), typeof(BelastingTab), new PropertyMetadata(default(IEnumerable), BuiDataChanged)); 

private static void BuiDataChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) 
{ 
    var Object = d as BelastingTab; 
    if (Object == null) return; 
    Object.BuiDataDataSourceChanged(d, e); 
} 

private void BuiDataDataSourceChanged(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs dependencyPropertyChangedEventArgs) 
{ 
    BuiDataTabel.ItemsSource = dependencyPropertyChangedEventArgs.NewValue as IEnumerable; 
} 

public IEnumerable BuiData 
{ 
    get { return (IEnumerable)GetValue(BuiDataProperty); } 
    set { SetValue(BuiDataProperty, value); } 
} 

，並在主XAML：

<src:BelastingTab BuiData="{Binding Path=Static.BuienRegulier[0].BuiTabel}"/> 

這是用於設置DataGrid的綁定代碼，我怎麼會去這樣做相同的文本框？

編輯： 這是我目前，

主要XAML：

<src:BelastingTab BuiData="{Binding Path=Static.BuienRegulier[0].BuiTabel}" HerhalingsTijd="{Binding Path=Static.BuienRegulier[0].HerhalingsTijd}"/> 

這是指一個字符串。在用戶控件XAML：

<TextBox Text="{Binding HerhalingsTijd, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/> 

在用戶控件XAML CS：

public static readonly DependencyProperty HerhalingsTijdProperty = DependencyProperty.Register("HerhalingsTijd", typeof(string), typeof(BelastingTab), new PropertyMetadata(string.Empty)); 

public string HerhalingsTijd 
{ 
    get { return (string)GetValue(HerhalingsTijdProperty); } 
    set { SetValue(HerhalingsTijdProperty, value); } 
} 

Answer 1

我看到做你想要的東西沒有問題。我創建了一個簡單的測試程序。我會在這裏提供代碼，希望它能幫助你以某種方式解決你錯誤的問題。

的代碼的UserControl1：

public partial class UserControl1 : UserControl 
{ 
    public static DependencyProperty TxtBoxValueProperty = DependencyProperty.Register("TxtBoxValue", typeof(String), typeof(UserControl1)); 

    public String TxtBoxValue 
    { 
     get { return (String)GetValue(TxtBoxValueProperty); } 
     set 
     { 
      SetValue(TxtBoxValueProperty, value); 
     } 
    } 

    protected override void OnPropertyChanged(DependencyPropertyChangedEventArgs e) 
    { 
     base.OnPropertyChanged(e); 
     if (e.Property == TxtBoxValueProperty) 
     { 
      // Do whatever you want with it 
     } 
    } 

    public UserControl1() 
    { 
     InitializeComponent(); 
    } 
} 

用戶控制的Xaml：

<StackPanel> 
    <TextBox Text="{Binding TxtBoxValue, UpdateSourceTrigger=PropertyChanged, RelativeSource={RelativeSource AncestorType=UserControl, AncestorLevel=1}, Mode=TwoWay}" Width="100" Height="50"/> 
    <TextBox></TextBox> 
</StackPanel> 

主窗口XAML：

<Window x:Class="WpfApplication1.MainWindow" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    Title="MainWindow" Height="350" Width="525" 
    xmlns:local="clr-namespace:WpfApplication1" 
    DataContext="{Binding RelativeSource={RelativeSource Self}}"> 
<Grid> 
    <local:UserControl1 TxtBoxValue="{Binding TextBoxValue, Mode=TwoWay}"></local:UserControl1> 
</Grid> 

主窗口後面的代碼：

public partial class MainWindow : Window, INotifyPropertyChanged 
{ 
    CancellationTokenSource cTS; 
    CancellationToken cT; 

    private String _textBoxValue; 
    public String TextBoxValue 
    { 
     get { return _textBoxValue; } 
     set 
     { 
      _textBoxValue = value; 
      if (PropertyChanged != null) 
      { 
       PropertyChanged(this, new PropertyChangedEventArgs("TextBoxValue")); 
      } 

      if (_textBoxValue.Contains("enough")) 
      { 
       cTS.Cancel(); 
      } 
     } 
    } 

    public MainWindow() 
    { 
     InitializeComponent(); 
     cTS = new CancellationTokenSource(); 
     cT = cTS.Token; 
     Task.Factory.StartNew(ChangeTextBoxValue, cT); 
    } 

    public void ChangeTextBoxValue() 
    { 
     while (true) 
     { 
      Random rnd = new Random(DateTime.Now.Millisecond); 
      TextBoxValue = (rnd.NextDouble() * 1000.0).ToString(); 
      Thread.Sleep(10000); 
     } 
    } 

    public event PropertyChangedEventHandler PropertyChanged; 
} 

請注意，我已經寫了這個非常快，做了我通常如何使用它（除了通知，我把一個ViewModelBase）。

如果這不起作用你的情況，它要麼我不明白的問題，或者你有一些非常具體的東西，但我懷疑這一點。