Wpf Custom Control problem

Question

I have strange problem with WPF custom control that I have made. When I drag and drop WPF custom control from toolbox to design surface I only see one border without any controls in it... I have another same WPF custom control project with same custom control and same code and when I reference that project everything works fine.

I have template in theme folder that is called DatePicker.Generic.Xaml and I have defined

<Style x:Key="{x:Type DateControls:DatePicker}" 
       TargetType="{x:Type DateControls:DatePicker}">

where DateControls is xml namespace of my DatePicker custom control. I have also added

[assembly: ThemeInfo(
    ResourceDictionaryLocation.SourceAssembly,
    ResourceDictionaryLocation.SourceAssembly)] 

in assemblyinfo file. Can someone help? Thanks

Answer 1

检查您的控件代码是否具有静态构造函数，该构造函数使用适当的类型参数调用DefaultStyleKeyProperty.OverrideMetadata（如果在VS中添加新的自定义控件，则会为您生成该代码）。

Answer 2

You may want to look at the ComponentResourceKey Markup Extension. Look at the TypeInTargetAssembly and ResourceId argument (of componentresourcekey)'s when you set the Style element.