我每隔几秒钟就会得到一个新的ObservableCollection参与者 - 查看获取更新的一切都很好,问题是SelectedItem,当你从列表框中选择一个项目时,SelectedParticipant会更新,但不是其他方式,我想通过逻辑(ObservableCollection每隔几个更新一次)秒)选择我想要的项目(突出显示),但它不起作用,它清楚选择/在我设置SelectedParticipant后不显示选择/突出显示
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是的,我被解雇的SelectedParticipant不是null
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尝试过LayoutUpdate()之类的东西
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尝试了UpdateSourceTrigger =在SelectedItem内的PropertyChanged = "{Binding SelectedParticipant, Mode=TwoWay}"
谢谢
private Participant _selectedParticipant;
public Participant SelectedParticipant
{
get
{
return _selectedParticipant;
}
set
{
if (_selectedParticipant != value)
{
_selectedParticipant = value;
RaisePropertyChanged("SelectedParticipant");
}
}
}
private ObservableCollection<Participant> _participants;
public ObservableCollection<Participant> Participants
{
get
{
return _participants;
}
set
{
if (_participants != value)
{
_participants = value;
RaisePropertyChanged("Participants");
if (_participants != null && _participants.Count > 0)
{
SelectedParticipant = null;
SelectedParticipant = Participants.FirstOrDefault(x => ... );
}
}
}
}
<ListBox ItemsSource="{Binding Participants}"
SelectedItem="{Binding SelectedParticipant, Mode=TwoWay}"
ItemContainerStyle="{StaticResource RedGlowItemContainer}"
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
Background="Transparent"
Padding="25">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<Border BorderThickness="6" >
<Grid>
<Image Source="{Binding Client.ImageURL}" VerticalAlignment="Center" HorizontalAlignment="Center" Stretch="Fill" Width="128" Height="128"/>
</Grid>
</Border>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
1 回答
而不是为参与者分配值做清除和添加 . 这只是一个尝试
我希望这将有所帮助 .