我無法弄清楚爲什麼ListView在更新項目到可觀察集合時沒有更新。 這裏可是什麼UI開始爲 將項添加到ObservableCollection不會更改ListView
無論出於何種原因ListView控件不拿起工作秩序,也沒有日期的檢查,它更新TechCount ...
這裏的ListView控件代碼:
<ListView Grid.Row="2"
ItemsSource="{Binding LaborItems}"
SelectedItem="{Binding SelectedLaborItem}"
Margin="10,10,10,9">
<ListView.View>
<GridView>
<GridViewColumn Header="#" Width="55" DisplayMemberBinding="{Binding Labor.WorkOrderNo}"/>
<GridViewColumn Header="Date" Width="100" DisplayMemberBinding="{Binding Labor.Time.CheckIn}"/>
<GridViewColumn Header="Techs" DisplayMemberBinding="{Binding TechCount}" />
</GridView>
</ListView.View>
</ListView>
它更容易看到relevan t代碼在圖片中,所以我正在做一個短的屏幕而不是原始代碼
第26行是當我點擊UI上的+按鈕時運行的。 TechCount對CheckIn有一個類似的實現,它只是指勞工內的字段。
下面是完整的視圖模型代碼:
public class ServiceItemsViewModel : ViewModelBase
{
public Labor Labor { get; set; }
public ObservableCollection<Labor> LaborItems { get; private set; } = new ObservableCollection<Labor>();
public ServiceItemsViewModel()
{
Labor = new Labor();
Labor.Rates = new LaborRatesDual();
AddLaborCommand = new DelegateCommand(addLabor, null);
}
public ICommand AddLaborCommand { get; private set; }
private void addLabor(object obj)
{
LaborItems.Add(Labor);
Labor = new Labor();
}
private bool canAddLabor(object arg)
{
if (Labor.Duration.Minutes < 1)
{
return false;
}
//if (AdditionalBillingRate <= 0 || AdditionalPayoutRate <= 0)
//{
// return false;
//}
return true;
}
public DateTime CheckIn
{
get { return Labor.Time.CheckIn; }
set
{
Labor.Time.CheckIn = value;
RaisePropertyChanged(nameof(Labor));
}
}
public DateTime CheckOut
{
get { return Labor.Time.CheckOut; }
set
{
Labor.Time.CheckOut = value;
RaisePropertyChanged(nameof(Labor));
((DelegateCommand)AddLaborCommand).RaiseCanExecuteChanged();
}
}
public int TechCount
{
get { return Labor.TechCount; }
set
{
Labor.TechCount = value;
RaisePropertyChanged(nameof(Labor));
}
}
public decimal InitialPayoutRate
{
get { return Labor.Rates.InitialPayoutRate; }
set
{
Labor.Rates.InitialPayoutRate = value;
RaisePropertyChanged(nameof(Labor));
//((DelegateCommand)AddLaborCommand).RaiseCanExecuteChanged();
}
}
public decimal AdditionalPayoutRate
{
get { return Labor.Rates.AdditionalPayoutRate; }
set
{
Labor.Rates.AdditionalPayoutRate = value;
RaisePropertyChanged(nameof(Labor));
//((DelegateCommand)AddLaborCommand).RaiseCanExecuteChanged();
}
}
public decimal InitialBillingRate
{
get { return Labor.Rates.InitialBillingRate; }
set
{
Labor.Rates.InitialBillingRate = value;
RaisePropertyChanged(nameof(Labor));
//((DelegateCommand)AddLaborCommand).RaiseCanExecuteChanged();
}
}
public decimal AdditionalBillingRate
{
get { return Labor.Rates.AdditionalBillingRate; }
set
{
Labor.Rates.AdditionalBillingRate = value;
RaisePropertyChanged(nameof(Labor));
//((DelegateCommand)AddLaborCommand).RaiseCanExecuteChanged();
}
}
private Labor selectedLaborItem;
public Labor SelectedLaborItem
{
get { return selectedLaborItem; }
set
{
selectedLaborItem = value;
RaisePropertyChanged(nameof(Labor));
}
}
你能否把一個斷點線26,並告訴我們'勞動的內容「是嗎? – Max
@Max在主帖中添加了截圖。 – haosmark
不確定,因爲我沒有使用WPF一段時間,但是您能否將DisplayMemberBinding =「{Binding Labor.Time.CheckIn}」'更改爲'DisplayMemberBinding =「{Binding Labor.Time.CheckIn,Mode = TwoWay ,UpdateSourceTrigger = PropertyChanged}「'?也許這些新屬性中的一個'Mode'或'UpdateSourceTrigger'可以幫助你解決這個問題。 – Max