WPF-采用父级的大小

我正试图找出调整某些控件大小的最佳方法，但不能完全正确。我有一个添加自定义控件的窗口：

<Grid x:Name="LayoutRoot">
    <my:RateGraph Grid.Column="0" x:Name="rateGraph1" Height="88" Width="380" />
</Grid>

然后，我希望调整XAML中定义的该控件的子组件的大小，以填充高度、宽度或两者。然而，我发现，如果我去掉显式的宽度/高度，尝试使用类似VerticalAlignment=“Stretch”的东西，那么我可以控制大小0。。。我做错了什么

<rb:RateBase x:Class="RateBar.RateGraph"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:rb="clr-namespace:RateBar"
             xmlns:sd="clr-namespace:System.Windows.Data"
             mc:Ignorable="d">
    <RangeBase.Resources>
        <rb:JScriptConverter x:Key="JScript" TrapExceptions="False"/>
        <ControlTemplate x:Key="rateGraphTemplate" TargetType="{x:Type rb:RateBase}">
            <Canvas HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
                <rb:Axis Width="320" Height="88"/>
                <Rectangle Height="88" Fill="#9690EE90" x:Name="progress">
                    <Rectangle.Width>
                        <MultiBinding Converter="{StaticResource JScript}" ConverterParameter="values[0]/values[1]*values[2]">
                            <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Value"/>
                            <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Maximum"/>
                            <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Width"/>
                        </MultiBinding>
                    </Rectangle.Width>
                </Rectangle>
                <Polygon Fill="#FF06B025" x:Name="graph" />
                <Label Canvas.Left="0" Width="380" HorizontalContentAlignment="Right" Foreground="Black" Content="{Binding Path=Caption, RelativeSource={RelativeSource TemplatedParent}}">
                    <Canvas.Bottom>
                        <MultiBinding Converter="{StaticResource JScript}" ConverterParameter="(values[2]*0.8)/values[1]*values[0]">
                            <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Rate"/>
                            <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="RateMaximum"/>
                            <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Height"/>
                        </MultiBinding>
                    </Canvas.Bottom>
                </Label>
                <Line X1="0" X2="380" Stroke="Black">
                    <Canvas.Bottom>
                        <MultiBinding Converter="{StaticResource JScript}" ConverterParameter="(values[2]*0.8)/values[1]*values[0]">
                            <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Rate"/>
                            <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="RateMaximum"/>
                            <Binding RelativeSource="{RelativeSource TemplatedParent}" Path="Height"/>
                        </MultiBinding>
                    </Canvas.Bottom>
                </Line>
            </Canvas>
        </ControlTemplate>
    </RangeBase.Resources>
</rb:RateBase>

---

宽度和高度属性主要用于设置要求的尺寸

如果使用拉伸等动态布局，请绑定到

ActualWidth

和

ActualHeight

属性：

<Binding RelativeSource="{RelativeSource ...}" Path="ActualWidth"/>

---

我试着做一些类似的事情，发现这样做效果很好：

    Width="{Binding RelativeSource={RelativeSource FindAncestor, 
    AncestorType={x:Type ListBox}},Path=ActualWidth}"

---

查看：

谢谢Ross，实际上我使用了相对资源，虽然我使用了“FindAncestor”和“Width”，但我还是采纳了你的建议。谢谢。我这样做了，而且效果很好：Width=“{Binding RelativeSource={RelativeSource Mode=FindAncestor，AncestorType={x:Type Window}}，Path=Width}”