在自定义控件中设置组合框ItemSource/SelectedValue

Question

如何在代码（不是XAML）中复制以下代码？

<ComboBox Name="DisplayValueComboBox" Grid.Column="1" ItemsSource="{Binding Source={wpfUtil:EnumBindingSource {x:Type unitTypes:FeetOrMetersSelectionType}}}" SelectedValue="{Binding Path=DisplayValueType}"></ComboBox> 

我在试图创建一个通用的自定义用户控件。为此，我必须在所有代码中执行此操作。我的自定义控件只是一个文本框和一个组合框。组合框应包含枚举中的项目（在通用中指定）。这些项目将是要显示的单位列表（英尺/米，度/弧度等）。如果用户更改单位，文本框中的值将被转换（使用MultiValueConverter）我已经通过XAML使用here所述的方法完成了组合枚举绑定。而且，我已经掌握了控制工作，没有通用的英尺/米单位控制。但是，现在我失去了如何在通用的构造函数中设置ItemSource和SelectedValue。

下面是基本的休息通用和子类，如果有帮助：

/// <summary> 
/// Control that displays value in different units depending on selected unit type. 
/// </summary> 
/// <typeparam name="TDisplayTypeEnum">The enumeration type for all the available units.</typeparam> 
/// <typeparam name="TConverterType">The MultiValueConverter that converts the value between the different types of units.</typeparam> 
/// <typeparam name="TValueType">The underlying type of the stored value.</typeparam> 
public class UnitControlBase<TDisplayTypeEnum, TConverterType, TValueType> : UserControl 
    where TDisplayTypeEnum : struct, IConvertible 
    where TConverterType : IMultiValueConverter, new() 
{ 
    /// <summary> 
    /// Constructor. 
    /// </summary> 
    public UnitControlBase() 
    { 
     Grid mainGrid = new Grid(); 
     mainGrid.Name = "LayoutRoot"; 
     this.AddChild(mainGrid); 

     ColumnDefinition col1 = new ColumnDefinition(); 
     ColumnDefinition col2 = new ColumnDefinition(); 
     mainGrid.ColumnDefinitions.Add(col1); 
     mainGrid.ColumnDefinitions.Add(col2); 

     TextBox displayValueTextBox = new TextBox(); 
     displayValueTextBox.Name = "DisplayValueTextBox"; 
     MultiBinding mb = new MultiBinding(); 
     mb.Converter = new TConverterType(); 
     mb.Bindings.Add(new Binding("Value")); 
     mb.Bindings.Add(new Binding("ValueType")); 
     mb.Bindings.Add(new Binding("DisplayValueType")); 
     displayValueTextBox.SetBinding(TextBox.TextProperty, mb); 
     Grid.SetColumn(displayValueTextBox, 0); 
     mainGrid.Children.Add(displayValueTextBox); 

     ComboBox displayValueComboBox = new ComboBox(); 
     displayValueComboBox.Name = "DisplayValueComboBox";    
     //displayValueComboBox.ItemsSource = ??? 
     //displayValueComboBox.SelectedValue = ??? 
     Grid.SetColumn(displayValueComboBox, 1); 
     mainGrid.Children.Add(displayValueComboBox);    
    } 

    private static FrameworkPropertyMetadata valuePropertyMetadata = new FrameworkPropertyMetadata(default(TValueType)); 

    public static readonly DependencyProperty ValueProperty = 
     DependencyProperty.Register("Value", typeof(TValueType), typeof(UnitControlBase<TDisplayTypeEnum, TConverterType, TValueType>), valuePropertyMetadata); 

    public TValueType Value 
    { 
     get 
     { 
      return (TValueType)GetValue(ValueProperty); 
     } 
     set 
     { 
      SetValue(ValueProperty, value); 
     } 
    } 

    private static FrameworkPropertyMetadata valueTypePropertyMetadata = new FrameworkPropertyMetadata(default(TDisplayTypeEnum)); 

    public static readonly DependencyProperty ValueTypeProperty = 
     DependencyProperty.Register("ValueType", typeof(TDisplayTypeEnum), typeof(UnitControlBase<TDisplayTypeEnum, TConverterType, TValueType>), valueTypePropertyMetadata); 

    public TDisplayTypeEnum ValueType 
    { 
     get 
     { 
      return (TDisplayTypeEnum)GetValue(ValueTypeProperty); 
     } 
     set 
     { 
      SetValue(ValueProperty, value); 
     } 
    } 

    private static FrameworkPropertyMetadata displayValueTypePropertyMetadata = new FrameworkPropertyMetadata(default(TDisplayTypeEnum)); 

    public static readonly DependencyProperty DisplayValueTypeProperty = 
     DependencyProperty.Register("DisplayValueType", typeof(TDisplayTypeEnum), typeof(UnitControlBase<TDisplayTypeEnum, TConverterType, TValueType>), displayValueTypePropertyMetadata); 

    public TDisplayTypeEnum DisplayValueType 
    { 
     get 
     { 
      return (TDisplayTypeEnum)GetValue(DisplayValueTypeProperty); 
     } 
     set 
     { 
      SetValue(DisplayValueTypeProperty, value); 
     } 
    } 
} 

子类：

public class FeetMetersControlBase : UnitControlBase<FeetOrMetersSelectionType, FeetToMetersMultiValueConverter, double> 
{ 
} 

英尺/米类型：

public enum FeetOrMetersSelectionType 
{ 
    Feet, 
    Meters 
} 

Answer 1

尝试这个：

displayValueComboBox.ItemsSource = Enum.GetValues(typeof(TDisplayTypeEnum)); 
displayValueComboBox.SetBinding(ComboBox.SelectedItemProperty, new Binding("DisplayValueType") { Source = this });