一个看似简单的问题让我陷入了僵局。我有一个包含 TextBlock 的用户控件。我希望绑定 TextBlock 的几个属性(Text、FontSize、Foreground、Background、Margin)。我在想,与其创建一大堆代码和 5 个 DependencyProperties,不如简单地为这些属性创建一个小类并简单地注册它。
这是我在 UserControl.xaml 中的内容
<TextBlock Grid.Row="1" Grid.RowSpan="1" DataContext="XTitle"
Text="{Binding ElementName=MultiButton, Path=XTitle.Text, FallbackValue='Heart-Rate'}"
FontSize="{Binding ElementName=MultiButton, Path=XTitle.FontSize, FallbackValue='26'}"
Foreground="{Binding ElementName=MultiButton, Path=XTitle.ForeColor, FallbackValue='White'}"
Background="{Binding ElementName=MultiButton, Path=XTitle.Background, FallbackValue='Black'}"
TextAlignment="Center" VerticalAlignment="Center" />
在 (userControl.xaml.vb) 后面的代码中,我有这个:
Public Shared ReadOnly XTitleProperty As DependencyProperty
Shared Sub New()
XTitleProperty = DependencyProperty.Register("XTitle", GetType(TextPart), GetType(MultiButton))
End Sub
Public Property XTitle As TextPart
Get
Return CType(GetValue(XTitleProperty), TextPart)
End Get
Set(value As TextPart)
SetValue(XTitleProperty, value)
End Set
End Property
Public Class TextPart
Property Text As String = "ABCD"
Property FontSize As Single = 16
Property Foreground As Color = Colors.Yellow
Property Background As Color = Colors.Black
End Class
在 Window.xaml 中(我只是想让这一切正常工作,因此暂时没有 MVVM):
<Grid>
<lbUserControl:MultiButton XTitle="{Binding SensorTitle}"/>
</Grid>
最后在 Window.xaml.vb 代码隐藏中,我们有这个:
Private _sensorTitle As MultiButton.TextPart
Public ReadOnly Property SensorTitle() As MultiButton.TextPart
Get
Return _sensorTitle
End Get
End Property
Public Sub New()
_sensorTitle = New MultiButton.TextPart
_sensorTitle.Text = "HRM"
_sensorTitle.FontSize = 16
_sensorTitle.Foreground = Colors.Cyan
_sensorTitle.Background = Colors.SaddleBrown
End Sub
我显然在某个地方错过了一个技巧,因为我认为数据绑定根本没有参与。很高兴收到 vb 或 c# 中的评论。谢谢。