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MarkupExtension:將簡單屬性轉換為DependencyProperty

[英]MarkupExtension: Converting a simple property to DependencyProperty

我正在使用WPFLocalizationExtension(在CodePlex上可用)來本地化我的WPF應用程序中的字符串。 這個簡單的MarkupExtension在這樣的簡單場景中運行良好:

<Button Content="{lex:LocText MyApp:Resources:buttonTitle}" />

但是一旦我嘗試了一些更復雜的事情,我就陷入困境:

<Window Title="{lex:LocText MyApp:Resources:windowTitle, FormatSegment1={Binding Version}}" />

(使用資源windowTitle = "MyApp v{0}" )。

由於FormatSegment1是一個簡單的INotifyPropertyChange屬性,我無法綁定任何東西。 如果FormatSegment1是DependencyProperty,那么我可以下載源代碼並嘗試補丁。

我修改了

[MarkupExtensionReturnType(typeof(string))]
public class LocTextExtension : BaseLocalizeExtension<string>
{

    // ---- OLD property

    //public string FormatSegment1
    //{
    //    get { return this.formatSegments[0]; }
    //    set
    //    {
    //        this.formatSegments[0] = value;
    //        this.HandleNewValue();
    //    }
    //}

    // ---- NEW DependencyProperty

    /// <summary>
    /// The <see cref="FormatSegment1" /> dependency property's name.
    /// </summary>
    public const string FormatSegment1PropertyName = "FormatSegment1";

    /// <summary>
    /// Gets or sets the value of the <see cref="FormatSegment1" />
    /// property. This is a dependency property.
    /// </summary>
    public string FormatSegment1
    {
        get
        {
            return (string)GetValue(FormatSegment1Property);
        }
        set
        {
            SetValue(FormatSegment1Property, value);
        }
    }

    /// <summary>
    /// Identifies the <see cref="FormatSegment1" /> dependency property.
    /// </summary>
    public static readonly DependencyProperty FormatSegment1Property = DependencyProperty.Register(
        FormatSegment1PropertyName,
        typeof(string),
        typeof(LocTextExtension),
        new UIPropertyMetadata(null));

    // ...
}

BaseLocalizeExtension類繼承自MarkupExtension

public abstract class BaseLocalizeExtension<TValue> : MarkupExtension, IWeakEventListener, INotifyPropertyChanged

當我構建時,我得到通常的"GetValue/SetValue does not exist in current context"錯誤。 我嘗試使BaseLocalizeExtension類繼承自DependencyObject但我遇到了大量錯誤。

有沒有辦法在MarkupExtension中使用xaml可綁定的DependencyProperty(或者也可綁定的東西)?

謝謝你的提示

你可以選擇附屬房產,這是你看到的唯一選擇。

例如

public static readonly DependencyProperty FormatSegment1Property = DependencyProperty.RegisterAttached(
        "FormatSegment1", typeof(string), typeof(LocTextExtension), new PropertyMetadata(default(string)));

public static void SetFormatSegment1(DependencyObject element, string value)
{
    element.SetValue(FormatSegment1Property, value);
}

public static string GetFormatSegment1(DependencyObject element)
{
    return (string)element.GetValue(FormatSegment1Property);
}

<Window Title="{lex:LocText MyApp:Resources:windowTitle}" lex:LocText.FormatSegment1="{Binding Version}" />

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