C#•8mo ago

✅ How do you control which WPF property is the default for that class?

Examine the following XAML:

<SomeClass>
  PropertyValue
</SomeClass>
<OtherClass>
  <OtherClass.Property>
    PropertyValue
  </OtherClass.Property>
</OtherClass>

<SomeClass>
  PropertyValue
</SomeClass>
<OtherClass>
  <OtherClass.Property>
    PropertyValue
  </OtherClass.Property>
</OtherClass>

If SomeClass where derived from System.Windows.Controls.Control, the property being set would be Content. But in other WPF classes, it might be something like Text. How do I specify my class's default property? The only thing I can find is for Windows Forms. Google happily found results for the default value, but I don't need that. I want the second example in the source above to resemble the first. In this case, I am deriving from System.Windows.Controls.UserControl, but as an abstract class. I don't want the derived class setting Content as that would mess up the base class.

2 Replies

nohopestage•8mo ago

https://learn.microsoft.com/en-us/dotnet/api/system.windows.markup.contentpropertyattribute?view=windowsdesktop-7.0

ContentPropertyAttribute Class (System.Windows.Markup)

Indicates which property of a type is the XAML content property. A XAML processor uses this information when processing XAML child elements of XAML representations of the attributed type.

Will Pittenger•8mo ago

Thanks.

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✅ How do you control which WPF property is the default for that class?