在自定義控件中設置ComboBox ItemSource / SelectedValue

Question

如何在代碼中復制以下代碼（非XAML）？

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

我試圖創建一個通用的自定義用戶控件。 為此，我必須在所有代碼中都這樣做。 我的自定義控件只是一個文本框和一個組合框。 組合框應包含枚舉中的項目（以通用方式指定）。 這些項目將是要顯示的單位列表（英尺/米，度/弧度等）。 如果用戶更改單位，則將轉換文本框中的值（使用MultiValueConverter）。我已經通過XAML使用此處描述的方法完成了組合枚舉綁定。 而且，我的控件在沒有通用的英尺/米單位控件的情況下也可以工作。 但是，現在我不知道如何在通用構造函數中設置ItemSource和SelectedValue。

下面是基本泛型和子類的其余部分（如果有幫助的話）：

/// <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);
        }
    }   
}

子班：

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

腳/米類型：

public enum FeetOrMetersSelectionType
{
    Feet,
    Meters
}

Answer 1

嘗試這個：

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