OnApplyTemplate未在自定义控件中调用

Question

我有一个使用一些PART控件的自定义控件:

 [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:

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

      InitializeEvents();
}

大部分时间都适用.我已经在窗口中的自定义选项卡控件中添加了控件,并且不会以某种方式为该控件调用OnApplyTemplate!为什么这不能像我期望的那样工作？

Answer 1

对于任何可能偶然发现这篇文章的人,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的AssemblyInfo.cs中来解决它:

[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)
)]

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

Answer 2

另外两个答案是正确的......但不完整.根据这篇文章(以及我刚刚解决这个问题的经验),你需要检查4件事情:(由于某种原因,如果我使用数字或破折号,这篇文章中的代码块将不会保持格式化...所以写信给它是)

答:控件模板和样式应位于Generic.xaml文件中,该文件夹名为Themes项目根目录.

B.确保您的命名空间正确 Generic.xaml

C.在控件的构造函数中设置样式键.还广泛建议您将以下内容放在静态构造函数中.

 static YourControl()
 {
      DefaultStyleKeyProperty.OverrideMetadata(typeof(YourControl), new FrameworkPropertyMetadata(typeof(YourControl)));
 }

D.确保您的assemblyinfo.cs中包含以下内容

 [assembly: ThemeInfo(ResourceDictionaryLocation.None, 
 //where theme specific resource dictionaries are located
 //(used if a resource is not found in the     
 // 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)
 )]

Answer 3

我看不到你的构造函数，但不要忘记设置 DefaultStyleKey：

DefaultStyleKeyProperty.OverrideMetadata(typeof(TitleBoxNew), new FrameworkPropertyMetadata(typeof(TitleBoxNew)));