我有一个用户控件,其datacontext设置为名为 EmployeeList_VM 的视图模型。然后,我在该用户控件中有一个ContentControl,其datacontect设置为视图模型的公共属性( EmployeeSelection )。 ContentControl的datacontext与同一用户控件中列表框的选定项绑定相同。
我希望在ContentControl中有一个组合框(名为 EmployeeStatus 的observblecollection)将其selecteditem绑定到ContentControl的 EmployeeSelection datacontext的属性。我希望组合框的itemssource绑定到“父”viewmodel EmployeeList_VM 的公共属性 EmployeeStatus 。
我可以在组合框中看到员工状态列表。我无法将其绑定到 EmployeeSelection 的idStatus属性。
以下是我到目前为止(为了便于阅读而删除了一些代码):
<UserControl x:Class="FTC.View.EmployeeListView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:FTC_Application"
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
xmlns:cmd="http://www.galasoft.ch/mvvmlight"
mc:Ignorable="d"
DataContext="{Binding EmployeeList_VM, Source={StaticResource Locator}}"
d:DesignHeight="900" d:DesignWidth="1000">
<Expander x:Name="DetailExpander" Grid.Column="2" Header="employee detail" Style="{DynamicResource ExpanderStyle_FTC}" IsExpanded="True" Padding="8,0,0,10" >
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<StackPanel Orientation="Vertical" HorizontalAlignment="Left" >
<Button Content="" Style="{DynamicResource ButtonSave}" Command="{Binding SaveCommand}" ToolTip="Save Changes" Margin="0,0,10,10"/>
<Button Content="" Style="{DynamicResource ButtonUndo}" Command="{Binding UndoCommand}" ToolTip="Undo Changes" Margin="0,0,10,10"/>
</StackPanel>
<ScrollViewer Grid.Column="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<ContentControl DataContext="{Binding Path=EmployeeSelection, Mode=TwoWay}" >
<!-- FTC SETTINGS GRID CONTENT-->
<Grid Grid.ColumnSpan="6" Grid.Row="1">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="30"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<TextBlock x:Name="SettingsHeading" Text="FTC Settings" Style="{StaticResource FTC_DetailHeading}" Grid.ColumnSpan="5"/>
<TextBlock Text="Status" Style="{StaticResource FTC_DetailLabelSub}" Grid.Column="1" Grid.ColumnSpan="2" Grid.Row="1"/>
<ComboBox Grid.Column="1" Grid.ColumnSpan="2" Grid.Row="2"
Margin="5,5,16,5" Height="37"
ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}},Path=DataContext.EmployeeStatus}"
SelectedItem="{Binding idStatus, Mode=TwoWay}"
SelectedValuePath="idStatus"
DisplayMemberPath="chrCode" FontSize="18"/>
</Grid>
</ContentControl>
</ScrollViewer>
</Grid>
</Expander>
</UserControl>
我甚至为组合框的选定项目尝试了以下更改(我将其命名为ContentControl DetailControl):
SelectedItem="{Binding ElementName=DetailControl, Path=DataContext.idStatus}"
有人可以帮助我正确连接选定的项目绑定。组合框显示所有正确的项目,但它们不绑定到EmployeeSelection.idStatus。
提前致谢。
答案 0 :(得分:8)
所以这里对我有用,希望它可以帮助别人
<ComboBox Name="cbStatus" Grid.Column="1" Grid.ColumnSpan="2" Grid.Row="2"
Style="{StaticResource FTC_DetailComboBox}"
ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}},Path=DataContext.EmployeeStatus}"
SelectedItem="{Binding ElementName=DetailControl, Path=DataContext.employee_status}"
SelectedValuePath="idStatus"
SelectedValue="{Binding idStatus, Mode=TwoWay, ValidatesOnDataErrors=True}"
DisplayMemberPath="chrCode"/>