我正在创建一个简单的用户控件，将弹出窗口与文本视图相结合，这并不疯狂。当我一开始在窗口中设置它以设置样式时，它工作得很好，但是当我将它移到用户控件中以实际完成它时，它就不能再正常工作了。
我将一个最小值和最大值传递给控件，然后它会自动创建一个数字列表以在该范围内进行选择。在用户控件中，数字列表没有正确绑定，谁知道为什么。也许有人可以看看我的代码。
我已经阅读了很多关于此的其他问题，但真的不知道发生了什么。我的输出窗口中没有任何错误，所以那里没有任何线索。无论如何，这是代码 -
用户控件.xaml
<UserControl x:Class="UserControl1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Name="Me"
DataContext="{Binding RelativeSource={RelativeSource Self}}">
<StackPanel>
<TextBox Name="myTextbox"
Height="30"
Margin="0"
FontSize="14"
IsReadOnly="True"
Padding="5,2"
Text="{Binding Value}" />
<Popup x:Name="myPopup"
PlacementTarget="{Binding ElementName=myTextbox}"
StaysOpen="True">
<Popup.Style>
<Style TargetType="{x:Type Popup}">
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=myTextbox, Path=IsFocused}" Value="True">
<Setter Property="IsOpen" Value="True" />
</DataTrigger>
</Style.Triggers>
</Style>
</Popup.Style>
<StackPanel>
<ListView Name="myListView"
Height="100"
MaxHeight="300"
ItemsSource="{Binding List,
UpdateSourceTrigger=PropertyChanged}"
SelectionChanged="ListView_SelectionChanged">
<ListView.ItemTemplate>
<DataTemplate>
<Label Width="100"
Height="30"
Margin="0"
Content="{Binding}"
FontFamily="Segoe UI"
FontSize="14"
Padding="5,2" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<Button Width="200" Height="30" />
</StackPanel>
</Popup>
</StackPanel>
用户控件.xaml.vb
Imports System.ComponentModel
Imports System.Linq.Expressions
Imports System.Collections.ObjectModel
Class UserControl1
' Dependency Properties
Public Shared ReadOnly ListProperty As DependencyProperty = DependencyProperty.Register("List", GetType(ObservableCollection(Of Integer)), GetType(MainWindow))
Public Shared ReadOnly ValueProperty As DependencyProperty = DependencyProperty.Register("Value", GetType(Integer), GetType(MainWindow))
Public Shared ReadOnly MaxValueProperty As DependencyProperty = DependencyProperty.Register("MaxValue", GetType(Integer), GetType(MainWindow))
Public Shared ReadOnly MinValueProperty As DependencyProperty = DependencyProperty.Register("MinValue", GetType(Integer), GetType(MainWindow))
' Properties
Public Property List As ObservableCollection(Of Integer)
Get
Return DirectCast(GetValue(ListProperty), ObservableCollection(Of Integer))
End Get
Set(value As ObservableCollection(Of Integer))
SetValue(ListProperty, value)
End Set
End Property
Public Property Value As Integer
Get
Return DirectCast(GetValue(ValueProperty), Integer)
End Get
Set(value As Integer)
SetValue(ValueProperty, value)
End Set
End Property
Public Property MaxValue As Integer
Get
Return DirectCast(GetValue(MaxValueProperty), Integer)
End Get
Set(value As Integer)
SetValue(MaxValueProperty, value)
End Set
End Property
Public Property MinValue As Integer
Get
Return DirectCast(GetValue(MinValueProperty), Integer)
End Get
Set(value As Integer)
SetValue(MinValueProperty, value)
End Set
End Property
Private Sub ListView_SelectionChanged(sender As System.Object, e As System.Windows.Controls.SelectionChangedEventArgs)
Value = List(myListView.SelectedIndex)
End Sub
Private Sub UserControl1_Loaded(sender As Object, e As System.Windows.RoutedEventArgs) Handles Me.Loaded
List = New ObservableCollection(Of Integer)
' Add all available numbers into the list
For iCounter As Integer = MinValue To MaxValue
List.Add(iCounter)
Next
' Set the selected index on the list for the value
myListView.SelectedIndex = Value - MinValue
End Sub
End Class
仅供参考，当我对此进行测试时，我自己在窗口和用户控件设置中设置了最小值和最大值。