如何在我的自定义用户控制的XAML引用中使用自定义属性？ 我已经实现了一个自定义用户控件，以使用Helix Toolkit在3D中呈现某些形状，我将此控件包括在MainWindow中（在这些代码示例中，我删除了域细节，因此它们似乎是

Question

然后在Mainwindow的某个地方，我指的是：

<graphicus:CakeAndPuddingUnderAngleRenderer Grid.Column="2" Grid.Row="1" x:Name="CakePuddingRenderer"/>

在此控件中调用数据渲染，我在事件处理程序中执行调用（例如，在datagrids中选择的事件中，输入的值更改的价值更改），例如：

// selectedCake represents a selected value in table of... cakes!
CakePuddingRenderer.LoadCakeInViewPort(fullPath, 
selectedCake.CakeName,selectedCake.CakeAngle, selectedCake.CakeMirror);

这样：

// sPudding is a selected value in table of... pudding!
// CakePuddingAngleTestVM is a ViewModel class for a MainWindow
CakePuddingRenderer.LoadPuddingInViewPort(sPudding.PuddingGeometryInstance, 
(DataContext as CakePuddingAngleTestVM).StartPuddingAngle, 
(DataContext as CakePuddingAngleTestVM).StartPuddingCoordinateX, 
(DataContext as CakePuddingAngleTestVM).StartPuddingCoordinateY, 
(DataContext as CakePuddingAngleTestVM).StartPuddingCoordinateZ);

未来的代码将太纠缠。是否可以为我的自定义控件添加参数并为其分配绑定，例如：

<graphicus:CakeAndPuddingUnderAngleRenderer 
StartPuddingAngleValue="{Binding StartPuddingAngle}" 
PuddingGeometryValue="{Binding PuddingGeometryInstance}"
StartPuddingCoordinateXValue="{Binding StartPuddingCoordinateX}" 
StartPuddingCoordinateYValue="{Binding StartPuddingCoordinateY}" 
StartPuddingCoordinateZValue="{Binding StartPuddingCoordinateZ}" 
CakeNameValue={Binding ... }
Grid.Column="2" Grid.Row="1" x:Name="CakePuddingRenderer"/>

？ 我认为它可能是MVVM

的风格

依赖性属性对此任务有帮助。我从评论中得到了暗示。我在这里读过：

Https：//metanit.com/sharp/wpf/13.php

我是我定义这种依赖性属性的方式：

Answer 1

public static readonly DependencyProperty StartPuddingXProperty = DependencyProperty.Register(
            "StartPuddingX",
            typeof(double),
            typeof(ProfileAndPuddingUnderAngleRenderer),
            new FrameworkPropertyMetadata(
                0.0,
                FrameworkPropertyMetadataOptions.None,
                new PropertyChangedCallback(OnStartPuddingXChanged),
                new CoerceValueCallback(CoerceStartPuddingX)));

CerercestartPuddingX非常适合验证，但我将其留为空

private static object CoerceStartPuddingX(DependencyObject d, object baseValue)
{
    return baseValue;
}

如果您想更改控制内部的一些值，那么

PropertyChangedCallback

和

OnStartPuddingXChanged

很有帮助：

// method called when the value of a property changes. It is static so you cannot access here parameters and methods of instance
private static void OnStartPuddingXChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
    if (d is ProfileAndPuddingUnderAngleRenderer control)
    {
        // Call an instance method to handle the change. You can access there instance properties and methods
        control.OnStartPuddingXChangedInstance((double)e.OldValue, (double)e.NewValue);
    }
}

that是IT