// Update an existing CommonDataType
public async Task<CrudResult> UpdatePersonAsync(Person person) {
using (HttpClientHandler handler = new HttpClientHandler { CookieContainer = new CookieContainer() }) {
using (var httpClient = new HttpClient()) {
string putUrl = string.Format("{0}{1}", _personBaseUrl, person.Id.ToString());
var response = await httpClient.PutAsJsonAsync<Person>(putUrl, person);
await response.EnsureSuccessWithValidationSupportAsync();
CrudResult crudResult = await response.Content.ReadAsAsync<CrudResult>();
return crudResult;
}
}
}
public async override void OnNavigatedTo(object navigationParameter, Windows.UI.Xaml.Navigation.NavigationMode navigationMode, Dictionary<string, object> viewModelState) {
base.OnNavigatedTo(navigationParameter, navigationMode, viewModelState);
if (viewModelState != null) {
if (navigationMode == NavigationMode.Refresh) {
var personErrorsCollection = RetrieveEntityStateValue<IDictionary<string, ReadOnlyCollection<string>>>("personErrorsCollection", viewModelState);
if (personErrorsCollection != null) {
SelectedPerson.SetAllErrors(personErrorsCollection);
}
}
}
// Note: Each time app selects from main page (PersonListPage) detail page (PersonDetailPage) is recreated.
// Meaning that constructor is run and SelectedPerson is null.
// If SuspendAndTerminate (e.g. debug mode) SelectedPerson is saved to SessionState (because of [RestorableState] attribute).
// Therefore, if SelectedPerson has been saved, use it instead of doing GetPersonAsync.
if (SelectedPerson == null) {
string errorMessage = string.Empty;
int personId = (int)navigationParameter;
if (personId == 0) {
SelectedPerson = new Person();
SelectedPerson.ValidateProperties();
RunAllCanExecute();
}
else {
try {
LoadingData = true;
CrudResult = await _personRepository.GetPersonAsync(personId);
SelectedPerson = JsonConvert.DeserializeObject<List<Person>>(CrudResult.Content.ToString()).FirstOrDefault<Person>();
}
catch (HttpRequestException ex) {
ErrorMessageTitle = ErrorMessagesHelper.HttpRequestExceptionError;
//TODO: Log stack trace to database here
ErrorMessage = string.Format("{0}", ex.Message);
}
finally {
LoadingData = false;
}
if (ErrorMessage != null && ErrorMessage != string.Empty) {
MessageDialog messageDialog = new MessageDialog(ErrorMessage, ErrorMessageTitle);
await messageDialog.ShowAsync();
_navService.GoBack();
}
}
}
RunAllCanExecute();
}
// When New button is pressed
private void OnNewPerson() {
SelectedPerson = new Person();
SelectedPerson.ValidateProperties();
RunAllCanExecute();
}
// Update an existing Person
public async Task<CrudResult> UpdatePersonAsync(Person person) {
CrudResult crudResult = await _personServiceProxy.UpdatePersonAsync(person);
return crudResult;
}
private void OnNavCommand(Person person) {
_navService.Navigate("PersonDetail", person.Id);
}