c# - 列表框复选框未绑定(bind)到其源

Question

我需要帮助将我的复选框列表绑定(bind)在弹出框中的列表框中。我的 XAML 代码如下

<Popup Name="popUser" Placement="Bottom" PlacementTarget="{Binding ElementName=BtnUserFilter}" StaysOpen="False" Height="100" VerticalAlignment="Top">
            <Border Background="White" BorderBrush="Gray" BorderThickness="1,1,1,1">
                <StackPanel Margin="5,5,5,15">
                    <StackPanel Orientation="Horizontal" Margin="0,0,0,20">
                        <Button Margin="0,0,0,0" Name="BtnSelectAll" Click="BtnSelectAll_Click">
                            <Button.Template>
                                <ControlTemplate>
                                    <TextBlock Text="Select All" Foreground="Blue" Cursor="Hand" />
                                </ControlTemplate>
                            </Button.Template>
                        </Button>

                        <Button Margin="10,0,0,0" Name="BtnUnselectAll" Click="BtnUnselectAll_Click">
                            <Button.Template>
                                <ControlTemplate>
                                    <TextBlock Text="Select None" Foreground="Blue" Cursor="Hand" />
                                </ControlTemplate>
                            </Button.Template>
                        </Button>
                    </StackPanel>
                    <ListBox x:Name="lstUser" BorderThickness="0" Height="100" ItemsSource="{Binding Userlists,  RelativeSource={RelativeSource AncestorType=local:MainWindow}}">
                        <ListBox.ItemTemplate>
                            <DataTemplate>
                                <CheckBox IsChecked="{Binding Path=IsChecked, UpdateSourceTrigger=PropertyChanged}"
                                          Content="{Binding Path=UserIL, UpdateSourceTrigger=PropertyChanged}" />
                            </DataTemplate>
                        </ListBox.ItemTemplate>
                    </ListBox>
                </StackPanel>
            </Border>
        </Popup>

列表框绑定(bind)到的 View 模型中的代码是

Dim test = (From c In Users Select New With {Key c.User}).Distinct
    Dim Cnt As Integer
    For Cnt = 0 To test.Count - 1
        UserLists.Add(New UserList(Of String) With {.IsChecked = True, .UserIL = test(Cnt).User})
    Next

代码填充 UserList 变量中的所有用户，但未显示在 ListBox 中。我没有正确绑定(bind)复选框吗？想法？

Answer 1

确保 UserLists 是 ObservableCollection，因为常规列表不会将对其内容所做的更改传播到 UI。

此外，通过将 UserLists 称为 Userlists，我怀疑您的 xaml 中有错字(注意区分大小写)

For purposes of resolving backing types, WPF XAML is case sensitive by the same rules that the CLR is case sensitive. Object elements, property elements, and attribute names must all be specified by using the sensitive casing when compared by name to the underlying type in the assembly, or to a member of a type.