我正在创建一个简单的用户控件，它将弹出窗口和文本视图结合在一起，没有太复杂的东西。当我最初将其设置在窗口中以对其进行样式设计时，它完美地工作了，但是当我将其移动到用户控件中去实际完成它时，它不再正确工作。
我将一个最小值和最大值传递给该控件，然后它会自动创建一个在该范围内选择的数字列表。在用户控件中，数字列表无法正确绑定，谁知道为什么。也许有人可以看一下我的代码。
我已经阅读了许多其他关于此问题的问题，但不知道发生了什么。在输出窗口中没有获得任何错误信息，因此没有线索。无论如何，以下是代码 -
UserControl.xaml
我将一个最小值和最大值传递给该控件，然后它会自动创建一个在该范围内选择的数字列表。在用户控件中，数字列表无法正确绑定，谁知道为什么。也许有人可以看一下我的代码。
我已经阅读了许多其他关于此问题的问题，但不知道发生了什么。在输出窗口中没有获得任何错误信息，因此没有线索。无论如何，以下是代码 -
UserControl.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>
UserControl.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，当我测试时，我在窗口和用户控件设置中自己设置了最小值和最大值。