OnApplyTemplate 未在自定义控件中调用 [英] OnApplyTemplate not called in Custom Control

问题描述

我有一个自定义控件，它使用了一些 PART 控件:

I have a Custom Control which uses some PART controls:

 [TemplatePart(Name = "PART_TitleTextBox", Type = typeof(TextBox))]
    [TemplatePart(Name = "PART_TitleIndexText", Type = typeof(Label))]
    [TemplatePart(Name = "PART_TimeCodeInText", Type = typeof(TextBlock))]
    [TemplatePart(Name = "PART_TimeCodeOutText", Type = typeof(TextBlock))]
    [TemplatePart(Name = "PART_ApprovedImage", Type = typeof(Image))]
    [TemplatePart(Name = "PART_CommentsImage", Type = typeof(Image))]
    [TemplatePart(Name = "PART_BookmarkedImage", Type = typeof(Image))]
    public class TitleBoxNew : Control
    {
        static TitleBoxNew()
        { 
            DefaultStyleKeyProperty.OverrideMetadata(
                typeof(TitleBoxNew),
                new FrameworkPropertyMetadata(typeof(TitleBoxNew)));
        } 

        public TitleBoxNew() { }

        // ... rest of class
    }

此控件覆盖 OnApplyTemplate:

This control is overriding OnApplyTemplate:

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

      InitializeEvents();
}

大多数情况下效果很好.我在窗口中的自定义选项卡控件中添加了控件，并且以某种方式从未为该控件调用 OnApplyTemplate ！为什么这不像我期望的那样工作?

Which works well, most of the time. I have added the control inside a custom tab control in a window and somehow OnApplyTemplate is never called for that control! Why doesn't this work as I expect?

推荐答案

对于可能偶然发现这篇文章的其他人，我遇到了同样的问题，我设法通过将以下内容添加到包含我的自定义控件的项目:

For anyone else who might stumble upon this post, I was having the same issue and I managed to solve it by adding the following into the AssemblyInfo.cs of the project containing my custom control:

[assembly: ThemeInfo(
    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
    //(used if a resource is not found in the page, 
    // or application resource dictionaries)
    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
    //(used if a resource is not found in the page, 
    // app, or any theme specific resource dictionaries)
)]

我的控件模板位于与控件相同的项目中的 Theme/Generic.xaml 文件中.

My control's template is located in the file Theme/Generic.xaml in the same project as the control.

这篇关于OnApplyTemplate 未在自定义控件中调用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！