WPF 實現 PropertyGrid 三大方案詳解：從 WindowsFormsHost 到原生 Workflow 設計器控件

方案一：宿主 WinForms PropertyGrid

最快上手，三步驟：

1. 參考 System.Windows.Forms.dll。
2. XAML 引入命名空間：xmlns:my="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"。
3. 使用 WindowsFormsHost 包裹。

<WindowsFormsHost Height="287" Width="200">
    <my:PropertyGrid x:Name="PropertyGrid1" />
</WindowsFormsHost>

方案二：開源 WPF PropertyGrid (WPG)

CodePlex 專案 WPG，純 WPF 控件，無需宿主。

<Window ... xmlns:wpg="clr-namespace:WPG;assembly=WPG">
    <DockPanel>
        <Button x:Name="btn" DockPanel.Dock="Top">button for test</Button>
        <wpg:PropertyGrid DockPanel.Dock="Top" Instance="{Binding ElementName=btn}" />
    </DockPanel>
</Window>

方案三：整合 WF4.0 原生 PropertyInspectorView（推薦）

Workflow Designer 內建的屬性檢視器即為高階 PropertyGrid，五步驟封裝：

1. 自訂 WpfPropertyGrid : Grid。
2. 內含 WorkflowDesigner 私有欄位。
3. 將 Designer.PropertyInspectorView 加入 Children。
4. 透過反射取得 RefreshPropertyList、OnSelectionChanged、SelectionTypeLabel。
5. 實作 SelectedObject 屬性處理選擇變更。

public class WpfPropertyGrid : Grid
{
    private WorkflowDesigner Designer;
    private MethodInfo RefreshMethod, OnSelectionChangedMethod;
    private TextBlock SelectionTypeLabel;
    private object TheSelectedObject;

    public object SelectedObject
    {
        get => TheSelectedObject;
        set
        {
            TheSelectedObject = value;
            if (value != null)
            {
                var context = new EditingContext();
                var mtm = new ModelTreeManager(context);
                mtm.Load(value);
                var selection = Selection.Select(context, mtm.Root);
                OnSelectionChangedMethod.Invoke(Designer.PropertyInspectorView, new object[] { selection });
                SelectionTypeLabel.Text = value.GetType().Name;
            }
            else
            {
                OnSelectionChangedMethod.Invoke(Designer.PropertyInspectorView, new object[] { null });
                SelectionTypeLabel.Text = string.Empty;
            }
        }
    }

    public string FontAndColorData
    {
        set => Designer.PropertyInspectorFontAndColorData = value;
    }

    public WpfPropertyGrid()
    {
        Designer = new WorkflowDesigner();
        var inspector = Designer.PropertyInspectorView;
        inspector.Visibility = Visibility.Visible;
        Children.Add(inspector);

        var t = inspector.GetType();
        var flags = BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.DeclaredOnly;
        RefreshMethod = t.GetMethod("RefreshPropertyList", flags);
        OnSelectionChangedMethod = t.GetMethod("OnSelectionChanged", flags);
        SelectionTypeLabel = t.GetMethod("get_SelectionTypeLabel", flags).Invoke(inspector, null) as TextBlock;
        SelectionTypeLabel.Text = string.Empty;
    }

    public void RefreshPropertyList() => RefreshMethod.Invoke(Designer.PropertyInspectorView, new object[] { false });
}

總結比較

完整 Demo 下載：WpfPropertyGrid_Demo.rar