当我将项目添加到可观察集合时,我无法弄清楚为什么我的ListView没有更新。 这是UI的开始
无论出于何种原因,ListView没有提取工作单,也没有提取签入日期,但它确实更新了TechCount ...
这是ListView代码:
<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>
在图片中查看相关代码更容易,因此我做的是屏幕短代而不是原始代码
第26行是我点击UI上的+按钮时运行的。 TechCount与CheckIn有类似的实现,它只引用了Labor中的字段。
这是完整的viewmodel代码:
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));
}
}
答案 0 :(得分:0)
您的列绑定错误:
<GridViewColumn Header="#" Width="55" DisplayMemberBinding="{Binding **Labor.**WorkOrderNo}"/>
<GridViewColumn Header="Date" Width="100" DisplayMemberBinding="{Binding **Labor.**Time.CheckIn}"/>
<GridViewColumn Header="Techs" DisplayMemberBinding="{Binding TechCount}" />
请参阅上面的星号区域。
答案 1 :(得分:0)
您已经绑定了一系列人工
ItemsSource="{Binding LaborItems}"
劳工不是劳工的财产
<GridViewColumn Header="#" Width="55" DisplayMemberBinding="{Binding WorkOrderNo}"/>
<GridViewColumn Header="Date" Width="100" DisplayMemberBinding="{Binding Time.CheckIn}"/>