我在点击按钮时尝试更新另一个ViewModel。那个Viewmodel已经有一个更新自己的ViewModel的按钮，但是我希望在另一个viewModel上具有完全相同的功能
这是我的代码：
OlyckorViewModel（我想要更新的视图以及已经有更新它的按钮） SearchActiveInvestigationsCommand是更新它的按钮绑定
public class OlyckorViewModel : NotificationObject
{
private readonly ISosServiceDelegate _sosService;
private readonly IDialogService _dialogService;
private string _searchConditionDiarienummer;
private string _searchConditionFartygsnamn;
private string _searchConditionRegisterbeteckning;
private int? _searchConditionIMONummer;
private DateTime? _searchConditionHaendelseDatum;
private string _searchConditionOlyckshaendelsetypKod;
private bool _isSearching;
private bool _isSearchExpanded = true;
private ObservableCollection<SosListOlycka> _olyckor;
private SosListOlycka _selectedOlycka;
private string _statusText;
public OlyckorViewModel(ISosServiceDelegate sosService, ILoggerFacade logger, IDialogService dialogServce)
{
logger.Log("Initializing OlyckorViewModel", Category.Debug, Priority.Low);
_sosService = sosService;
_dialogService = dialogServce;
SearchCommand = new DelegateCommand(ExecuteSearch, CanExecuteSearch);
SearchActiveInvestigationsCommand = new DelegateCommand(ExecuteSearchActiveInvestigations, CanExecuteSearchActiveInvestigations);
OpenCommand = new DelegateCommand(ExecuteOpen, CanExecuteOpen);
DeleteCommand = new DelegateCommand(ExecuteDelete, CanExecuteDelete);
CreatePdfReportCommand = new DelegateCommand(ExecuteCreatePdfReport, CanExecuteCreatePdfReport);
}
private void ExecuteSearch()
{
if (IsSearching)
return;
IsSearching = true;
StatusText = "Söker olyckor...";
var criteria = new SosOlyckaSearchCriteria();
criteria.Diarienummer = SearchConditionDiarienummer;
criteria.Fartygsnamn = SearchConditionFartygsnamn;
criteria.Registerbeteckning = SearchConditionRegisterbeteckning;
criteria.IMONummer = SearchConditionIMONummer;
criteria.HaendelseDatum = SearchConditionHaendelseDatum;
criteria.OlyckshaendelseTypKod = SearchConditionOlyckshaendelsetypKod;
_sosService.SearchOlyckor(
criteria,
olyckor =>
{
HandleResultFromSearch(olyckor);
},
exception =>
{
IsSearching = false;
StatusText = "Misslyckades att söka olyckor";
DialogHelper.ShowException(exception);
}
);
}
private void HandleResultFromSearch(SosSearchResult<SosListOlycka> olyckor)
{
IsSearching = false;
IsSearchExpanded = false;
Olyckor = new ObservableCollection<SosListOlycka>(olyckor.Items);
StatusText = Olyckor.Count + " " + (Olyckor.Count == 1 ? "olycka." : "olyckor.");
if (olyckor.IsResultTruncated)
{
var statusTextResultTruncated = "Resultatet var för stort (" + olyckor.OriginalNumberOfHits + " olyckor) och trunkerades på servern.";
StatusText += " " + statusTextResultTruncated;
}
// if search result only contains a single item, it should be opened
if (Olyckor.Count == 1)
DialogHelper.OpenOlyckaDialog(Olyckor[0].OlyckaId);
}
OlyckaViewModel（应该有一个保存按钮来更新上面的视图模型的viewModel） SaveCommand是我要更新的按钮绑定，如上面的按钮
public class OlyckaViewModel : DialogWindowViewModel
{
private readonly ISosServiceDelegate _sosService;
private readonly Repository _repository;
private readonly IDialogService _dialogService;
private readonly IInteractionService _interactionService;
private readonly FroCodesViewModel _froCodesViewModel;
private SosOlycka _model;
private SosOlycksorsak _selectedOlycksorsak;
private SosOlycksorsak _selectedHuvudorsak;
private SosStegIOlycksfoerlopp _selectedStegIOlycksfoerlopp;
private SosStegIOlycksfoerlopp _selectedInledandeSteg;
private SosOlycka _selectedOtherOlycka;
private OlyckorViewModel _olyckorlist;
private readonly ObservableCollection<CheckBoxListItemViewModel<TrsFartygsunderkategori>> _fartygsunderkategorier = new ObservableCollection<CheckBoxListItemViewModel<TrsFartygsunderkategori>>();
private int? _olycksrapportIdToHaemtmarkeraWhenSaving;
private ObservableCollection<SosListOlycka> _olyckor;
private SosListOlycka _selectedOlycka;
private bool _isSearching;
private bool _isSearchExpanded = true;
private readonly List<KnownValue> _oestEllerVaest = new List<KnownValue>()
{
new KnownValue("Välj", null),
new KnownValue("E", "E"),
new KnownValue("W", "W")
};
private readonly List<KnownValue> _nordEllerSyd = new List<KnownValue>()
{
new KnownValue("Välj", null),
new KnownValue("N", "N"),
new KnownValue("S", "S")
};
public OlyckaViewModel(ISosServiceDelegate sosService, Repository repository, IDialogService dialogService, IInteractionService interactionService)
{
_sosService = sosService;
_repository = repository;
_dialogService = dialogService;
_interactionService = interactionService;
_froCodesViewModel = new FroCodesViewModel(ServiceLocator.Current.GetInstance<ISitsServiceDelegate>());
SaveCommand = new DelegateCommand(ExecuteSave);
ReloadCommand = new DelegateCommand(ExecuteReload, CanExecuteIfExistingOlycka);
CloseCommand = new DelegateCommand(Close);
DeleteCommand = new DelegateCommand(ExecuteDelete, CanExecuteIfExistingOlycka);
AvslutaUtredningCommand = new DelegateCommand(ExecuteAvslutaUtredning, CanExecuteIfExistingOlycka);
CreatePdfReportCommand = new DelegateCommand(ExecuteCreatePdfReport, CanExecuteIfExistingOlycka);
AddOlycksorsakCommand = new DelegateCommand(ExecuteAddOlycksorsak);
RemoveOlycksorsakCommand = new DelegateCommand(ExecuteRemoveOlycksorsak, CanExecuteRemoveOlycksorsak);
AddStegIOlycksfoerloppCommand = new DelegateCommand(ExecuteAddStegIOlycksfoerlopp);
RemoveStegIOlycksfoerloppCommand = new DelegateCommand(ExecuteRemoveStegIOlycksfoerlopp, CanExecuteRemoveStegIOlycksfoerlopp);
FetchFartygsinformationFromSitsCommand = new DelegateCommand(ExecuteFetchFartygsinformationFromSits);
NewOlyckaFromHaendelseCommand = new DelegateCommand(ExecuteNewOlyckaFromHaendelse);
OpenOtherOlyckaCommand = new DelegateCommand(ExecuteOpenOtherOlycka, CanExecuteOpenOtherOlycka);
MoveOlyckaToNewHaendelseCommand = new DelegateCommand(ExecuteMoveOlyckaToNewHaendelse);
MoveOlyckaToOtherHaendelseCommand = new DelegateCommand(ExecuteMoveOlyckaToOtherHaendelse);
MarkSelectedOlycksorsakAsHuvudorsakCommand = new DelegateCommand(ExecuteMarkSelectedOlycksorsakAsHuvudorsak);
MarkSelectedStegIOlycksfoerloppAsInledandeStegCommand = new DelegateCommand(MarkSelectedStegIOlycksfoerloppAsInledandeSteg);
SearchActiveInvestigationsCommand = new DelegateCommand(ExecuteSearchActiveInvestigations, CanExecuteSearchActiveInvestigations);
}
public DelegateCommand SaveCommand { get; private set; }
public DelegateCommand ReloadCommand { get; private set; }
public DelegateCommand CloseCommand { get; private set; }
public DelegateCommand DeleteCommand { get; private set; }
public DelegateCommand AvslutaUtredningCommand { get; private set; }
public DelegateCommand CreatePdfReportCommand { get; private set; }
public DelegateCommand AddOlycksorsakCommand { get; private set; }
public DelegateCommand RemoveOlycksorsakCommand { get; private set; }
public DelegateCommand AddStegIOlycksfoerloppCommand { get; private set; }
public DelegateCommand RemoveStegIOlycksfoerloppCommand { get; private set; }
public DelegateCommand FetchFartygsinformationFromSitsCommand { get; private set; }
public DelegateCommand NewOlyckaFromHaendelseCommand { get; private set; }
public DelegateCommand OpenOtherOlyckaCommand { get; private set; }
public DelegateCommand MoveOlyckaToNewHaendelseCommand { get; private set; }
public DelegateCommand MoveOlyckaToOtherHaendelseCommand { get; private set; }
public DelegateCommand MarkSelectedOlycksorsakAsHuvudorsakCommand { get; private set; }
public DelegateCommand MarkSelectedStegIOlycksfoerloppAsInledandeStegCommand { get; private set; }
public DelegateCommand SearchActiveInvestigationsCommand { get; private set; }
public DelegateCommand SearchCommand { get; private set; }
public FroCodesViewModel FroCodesViewModel { get { return _froCodesViewModel; } }
public OlyckorViewModel OlyckorViewModel { get { return _olyckorlist; } }
public SosOlycka Model
{
get { return _model; }
private set
{
if (value != _model)
{
_model = value;
RaisePropertyChanged(() => Model);
RaisePropertyChanged(() => IsExistingOlycka);
RaiseCanExecuteChangedForOlyckaCommands();
LoadDescriptionsForFroCodes();
SynchronizeFromModel();
}
}
}
private void ExecuteSave()
{
if (IsBusy)
throw new InvalidOperationException("Cannot save olycka, is already busy");
SynchronizeToModel();
// Validate ad-acta
List<string> missingAdActaFields = null;
if (Model.MyndighetensUtredningAvslutad.HasValue)
{
missingAdActaFields = DataHelper.ValidateAdActa(Model);
}
// Validate skrovskada
List<string> missingSkrovskadaFields = null;
if (Model.SosFartygsskada.Skrovskada == "J")
{
missingSkrovskadaFields = DataHelper.ValidateSkrovskada(Model);
}
if ((missingAdActaFields != null && missingAdActaFields.Count > 0)
|| (missingSkrovskadaFields != null && missingSkrovskadaFields.Count > 0))
{
// Bring up window of missing fields (or update if already open)
var vm = _dialogService.GetOpenDialogs().OfType<MissingFieldsViewModel>().FirstOrDefault();
if (vm != null)
{
vm.AdActaFields = missingAdActaFields;
vm.SkrovskadaFields = missingSkrovskadaFields;
_dialogService.Activate(vm);
}
else
{
vm = ServiceLocator.Current.GetInstance<MissingFieldsViewModel>();
vm.AdActaFields = missingAdActaFields;
vm.SkrovskadaFields = missingSkrovskadaFields;
_dialogService.Show(vm);
}
//
// Cancel save operation
return;
}
else
{
// Close window with missing fields if open)
var vm = _dialogService.GetOpenDialogs().OfType<MissingFieldsViewModel>().FirstOrDefault();
if (vm != null)
{
vm.Close();
}
}
SetBusy("Sparar ändringar...");
_sosService.SaveOlycka(
Model,
result =>
{
// load olycka using the id returned from save method (useful if olycka was new / not previously persisted)
ResetBusy();
if (IsGoingToHaemtmarkeraWhenSaving)
{
SetBusy("Markerar olycksrapport som hämtad...");
var rosService = ServiceLocator.Current.GetInstance<IRosServiceDelegate>();
rosService.HaemtmarkeraOlycksrapport(
OlycksrapportIdToHaemtmarkeraWhenSaving.Value,
result,
() =>
{
ResetBusy();
OlycksrapportIdToHaemtmarkeraWhenSaving = null;
LoadOlycka(result);
},
haemtmarkeraException =>
{
ResetBusy();
DialogHelper.ShowException(haemtmarkeraException);
}
);
}
else
{
LoadOlycka(result);
}
},
exception =>
{
ResetBusy();
DialogHelper.ShowException(exception);
}
);
ExecuteSearchActiveInvestigations();
}
我知道很多代码，我只是想确保不要错过任何内容。
我尝试将相同的代码从已经工作的按钮复制到我想要工作的按钮，但它没有工作，我怀疑它是因为我没有告诉它更新另一个视图，而不是自己。我可能是错的。
我感谢任何帮助，
答案 0 :(得分：1)
使用所需参数从OlyckaViewModel引发事件，并在OlyckorViewModel中进行订阅。 使代码在SearchActiveInvestigationsCommand中通用，并从订阅的事件方法调用相同的函数。
答案 1 :(得分：0)
我在点击按钮时尝试更新另一个ViewModel。
在另一个 viewmodel中，将更新代码集中到一个公共方法中。
app（请参阅Application.Current Property (System.Windows)）并找到对相关VM的引用。然后调用更新方法。