创建多个扩展控件

Question

我创建了一个继承标准 WPF TextBox 的扩展 TextBox，我现在要做的是创建其他扩展控件类型，例如 TextBlock、ListBox、ComboBox 等。所有控件都将具有相同的 DependencyProperties，如下所示，因此我试图找到一种方法来实现这一点，而无需重复每个新扩展控件背后的 DependencyProperty 代码。

Public Class ExtendedTextBox
    Inherits TextBox

    Public Shared MandatoryProperty As DependencyProperty = DependencyProperty.Register("Mandatory", GetType(Boolean), GetType(ExtendedTextBox)) 

    Public Shared ReadOnly HasAnyErrorsProperty As DependencyProperty = DependencyProperty.Register("HasAnyErrors", GetType(Boolean), GetType(ExtendedTextBox))
End Class

Answer 1

您可以定义可以在任何 UIElement:

上设置的 attached properties

Public Class MyProperties
    Public Shared ReadOnly MandatoryProperty As DependencyProperty = DependencyProperty.RegisterAttached("Mandatory", GetType(Boolean), GetType(MyProperties))
    Public Shared Sub SetMandatory(ByVal element As UIElement, ByVal value As Boolean)
        element.SetValue(MandatoryProperty, value)
    End Sub
    Public Shared Function GetMandatory(ByVal element As UIElement) As Boolean
        Return CType(element.GetValue(MandatoryProperty), Boolean)
    End Function
End Class

XAML:

<TextBox local:MyProperties.Mandatory="True" />
<ListBox local:MyProperties.Mandatory="False" />

创建多个扩展控件

Creating Multiple Extended Controls

vb.net

wpf

extended-properties

dependency-properties