获取 ContentControl 控件的子模板?

发布于 2024-11-05 15:06:04 字数 2142 浏览 0 评论 0原文

我们正在开发一个使用通用自定义 ContentControl 的 Silverlight 应用程序。此 ContentControl 具有在 Generic.xaml 中指定的控件模板。

继承的 ContentControl 的模板...

<Style TargetType="local:ExtContentControl">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="local:ExtContentControl">
                <Border x:Name="content" Background="{TemplateBinding Background}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        Child="{TemplateBinding Content}">
                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

继承的 ComboBox 的模板...

<controltemplate targettype="local:ExtComboBox"></controltemplate>

...

<Rectangle x:Name="FocusVisualElement" IsHitTestVisible="false" Margin="1" Opacity="0" RadiusY="2" RadiusX="2" Stroke="#FF6DBDD1" StrokeThickness="1"/>

当实例化时,ContentControl 的内容被设置为一个(通用)控件,可以是文本框、下拉列表、标签或日期选择器。

public class ExtContentControl : ContentControl
{
    public ExtContentControl()
    {
        this.DefaultStyleKey = typeof(ExtContentControl);

        RenderControl();
    }

    private void RenderControl()
    {
        ExtComboBox extComboBox = new ExtComboBox();
        this.Content = extComboBox;
    }

    public override void OnApplyTemplate()
    {
        base.OnApplyTemplate();

        Border bor = GetTemplateChild("content") as Border;

        ExtComboBox cmbTest = bor.Child as ExtComboBox;

        //Find FocusVisualElement from ExtComboBox Control Template
        //Rectangle rec = cmbTest.FindName("FocusVisualElement") as Rectangle;
        //cmbTest returns null
    }
}

正如您在我的上一条评论中看到的...

//从 ExtComboBox 控件模板中查找 FocusVisualElement //矩形rec = cmbTest.FindName("FocusVisualElement") as 矩形; //cmbTest 返回 null

如何从 ContentControl 内的 OnApplyTemplate 内部获取 FocusVisualElement?

希望这是有道理的。

We're working on a Silverlight application that uses a generic custom ContentControl. This ContentControl has a Control Template specified in a Generic.xaml.

The inherited ContentControl's Template...

<Style TargetType="local:ExtContentControl">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="local:ExtContentControl">
                <Border x:Name="content" Background="{TemplateBinding Background}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        Child="{TemplateBinding Content}">
                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

The inherited ComboBox's Template...

<controltemplate targettype="local:ExtComboBox"></controltemplate>

...

<Rectangle x:Name="FocusVisualElement" IsHitTestVisible="false" Margin="1" Opacity="0" RadiusY="2" RadiusX="2" Stroke="#FF6DBDD1" StrokeThickness="1"/>

When it is instantiated the ContentControl's content is set to a (generic) control which can be a Textbox, Dropdown, Label or Datepicker.

public class ExtContentControl : ContentControl
{
    public ExtContentControl()
    {
        this.DefaultStyleKey = typeof(ExtContentControl);

        RenderControl();
    }

    private void RenderControl()
    {
        ExtComboBox extComboBox = new ExtComboBox();
        this.Content = extComboBox;
    }

    public override void OnApplyTemplate()
    {
        base.OnApplyTemplate();

        Border bor = GetTemplateChild("content") as Border;

        ExtComboBox cmbTest = bor.Child as ExtComboBox;

        //Find FocusVisualElement from ExtComboBox Control Template
        //Rectangle rec = cmbTest.FindName("FocusVisualElement") as Rectangle;
        //cmbTest returns null
    }
}

As you can see in my last comment...

//Find FocusVisualElement from ExtComboBox Control Template
//Rectangle rec = cmbTest.FindName("FocusVisualElement") as Rectangle;
//cmbTest returns null

How can I get hold of FocusVisualElement from inside OnApplyTemplate inside the ContentControl?

Hope this makes sense.

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