有人对解决我的问题有任何建议吗?我有一个绑定(bind)到ModelCheckoutRecord
对象(ListModelCheckoutRecords
)集合的datagrid。我将所选项目绑定(bind)到ModelCheckoutRecord
(SelectedItemModelCheckoutRecord
)。在所选项目的绑定(bind)中,我想更新另一个datagrid和gridsplitter(ResponseVisibility
)的可见性绑定(bind)。从其他绑定(bind)更新绑定(bind)的功能似乎不起作用?
我的XAML行如下:
<Grid>
<Grid.RowDefinitions>
<View:RowDefinitionExtended Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<DataGrid AutoGenerateColumns="True" ItemsSource="{Binding ListModelCheckoutRecord}" SelectedItem="{Binding SelectedModelCheckoutRecord}" MouseLeftButtonDown="DataGrid_MouseLeftButtonDown" CommandManager.PreviewExecuted="DataGrid_DeletePreviewExecuted" IsReadOnly="False" CanUserAddRows="False" CanUserDeleteRows="True" Margin="15" Grid.Row="0"/>
<GridSplitter HorizontalAlignment="Stretch" Visibility="{Binding ResponseVisibility}" Grid.Row="1"/>
<DataGrid AutoGenerateColumns="True" ItemsSource="{Binding ListModelResponseRecord}" SelectedItem="{Binding SelectedModelResponseRecord}" MouseLeftButtonDown="DataGrid_MouseLeftButtonDown" IsReadOnly="False" CanUserAddRows="False" CanUserDeleteRows="False" Visibility="{Binding ResponseVisibility}" Margin="15" Grid.Row="2"/>
</Grid>
引起我麻烦的精简代码如下:
private Visibility responseVisibility = Visibility.Visible;
public Visibility ResponseVisibility
{
get { return responseVisibility; }
set
{
if (value == responseVisibility)
{
return;
}
responseVisibility = value;
RaisePropertyChanged("ResponseVisibility");
}
}
private List<ModelCheckoutRecord> listModelCheckoutRecord;
public List<ModelCheckoutRecord> ListModelCheckoutRecord
{
get { return listModelCheckoutRecord; }
set
{
if (value == listModelCheckoutRecord)
{
return;
}
listModelCheckoutRecord = value;
RaisePropertyChanged("ListModelCheckoutRecord");
ResponseVisibility = Visibility.Collapsed;
}
}
private ModelCheckoutRecord selectedModelCheckoutRecord;
public ModelCheckoutRecord SelectedModelCheckoutRecord
{
get { return selectedModelCheckoutRecord; }
set
{
if (value == null)
{
ResponseVisibility = Visibility.Collapsed;
return;
}
else
{
ResponseVisibility = Visibility.Visible;
}
if (selectedModelCheckoutRecord == value)
{
return;
}
RaisePropertyChanged("SelectedModelCheckoutRecord");
}
}
谢谢
理查德
最佳答案
假设您真的想只在使用null
的情况下具有不可见的可见性,那么实际上就不需要使用代码了。以下XAML可以很好地完成工作。
只需为您的源DataGrid命名(在下面的示例中我将Grid作为名称),然后在目标DataGrid中使用如下样式即可:
<DataGrid x:Name="TargetGridJustToShowWhereThisGoes">
<DataGrid.Style>
<Style TargetType="DataGrid">
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=Grid, Path=SelectedItem}" Value="{x:Null}">
<Setter Property="Visibility" Value="Collapsed" />
</DataTrigger>
</Style.Triggers>
</Style>
</DataGrid.Style>
</DataGrid>
关于c# - 在WPF中使用MVVM从其他绑定(bind)更新绑定(bind),我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/30804486/