当我按下我的提交按钮时，它将向数据库发送多个条目，我如何在此处设置循环以阻止此操作。我尝试将datetime设置为当时只允许一个条目，但是条目相隔一两秒，因此不起作用。
我已使用大多数代码更新了此问题，我不确定此错误来自何处，因此将不胜感激。
public AddSymptom()
{
InitializeComponent();
manager = SymptomsManager.DefaultManager; //intiialise the Azure Symptom class
weathermanager = WeatherManager.DefaultManager;
remedymanager = RemedyManager.DefaultManager;
imagemanager = ImagesManager.DefaultManager;
symmanager = SymptomManager.DefaultManager;
usersymptommanager = UserSymptomManager.DefaultManager;
symptomfeedbackmanager = SymptomFeedbackManager.DefaultManager;
//RemedyPicker.SelectedIndexChanged += RemedyPicker_SelectedIndexChanged;
Device.BeginInvokeOnMainThread(action: async () =>
{
Uri ImgSource = await App.GetImage("sym");
img.Source = ImgSource;
});
GetUserSymptoms();
//Set Label Titles
lblTitle.Text = "Add Symptom";
lblSubtutle.Text = "What symptom are you experiencing?";
autoComplete.Keyboard = Keyboard.Create(KeyboardFlags.CapitalizeSentence | KeyboardFlags.Spellcheck);
GetCorrectiveActions();
PopulateSymptomAutoComplete();
GetSymptomHistory();
}
async Task GetUserSymptoms()
{
UserSymptoms = await usersymptommanager.getuserSymptoms();
}
async Task PopulateSymptomAutoComplete()
{
GlobalSymptoms = await symmanager.getSymptoms();
try
{
autoComplete.DataSource = GlobalSymptoms;
autoComplete.DisplayMemberPath = "Description";
autoComplete.SelectedValuePath = "ID";
}
catch (Exception ex)
{
DisplayAlert(ex.ToString(), ex.ToString(), "OK");
}
autoComplete.SelectionChanged += (sender, e) =>
{
if (e.Value != "")
{
AutoCompleteSymptomToAdd = (symptom)e.Value;
}
};
}
async void HandleHelp_Clicked(object sender, System.EventArgs e)
{
if (lblTitle.Text == "Edit Symptom")
{
await Navigation.PushAsync(new ContextHelp(HelpConstants.EditSymptomHelpTitle, HelpConstants.EditSymptomHelpContent));
}
else
{
await Navigation.PushAsync(new ContextHelp(HelpConstants.AddSymptomHelpTitle, HelpConstants.AddSymptomHelpContent));
}
}
/// <summary>
/// Rating Slider Changed Event Handler
/// </summary>
/// <param name="sender">Sender.</param>
/// <param name="e">E.</param>
void Handle_ValueChanged(object sender, Xamarin.Forms.ValueChangedEventArgs e)
{
var newStep = Math.Round(e.NewValue / StepValue);
RatingSlider.Value = newStep * StepValue;
SliderValue.Text = RatingSlider.Value.ToString();
}
public AddSymptom(CorrectiveAction action)
{
InitializeComponent();
manager = SymptomsManager.DefaultManager; //intiialise the Azure Symptom class
weathermanager = WeatherManager.DefaultManager;
remedymanager = RemedyManager.DefaultManager;
imagemanager = ImagesManager.DefaultManager;
usersymptommanager = UserSymptomManager.DefaultManager;
//RemedyPicker.SelectedIndexChanged += RemedyPicker_SelectedIndexChanged;
Device.BeginInvokeOnMainThread(action: async () =>
{
Uri ImgSource = await App.GetImage("sym");
img.Source = ImgSource;
});
GetUserSymptoms();
//Set Label Titles
lblTitle.Text = "Add Symptom";
lblSubtutle.Text = "What symptom are you experiencing?";
GetCorrectiveActions();
//CommunitySwitch.IsVisible = false;
PopulateSymptomAutoComplete();
GetSymptomHistory();
//RemedyPicker.SelectedIndex = RemedyPicker.Items.IndexOf(action.Id);
}
void Handle_Scrolled(object sender, Xamarin.Forms.ScrolledEventArgs e)
{
autoComplete.IsDropDownOpen = false;
}
public AddSymptom(Symptoms symptom, bool isFeedback)
{
InitializeComponent();
manager = SymptomsManager.DefaultManager; //intiialise the Azure Symptom class
weathermanager = WeatherManager.DefaultManager;
remedymanager = RemedyManager.DefaultManager;
imagemanager = ImagesManager.DefaultManager;
usersymptommanager = UserSymptomManager.DefaultManager;
//RemedyPicker.SelectedIndexChanged += RemedyPicker_SelectedIndexChanged;
symptomfeedbackmanager = SymptomFeedbackManager.DefaultManager;
GetCorrectiveActions();
Device.BeginInvokeOnMainThread(action: async () =>
{
Uri ImgSource = await App.GetImage("sym");
img.Source = ImgSource;
});
GetUserSymptoms();
if (isFeedback == true)
{
this.Title = "Enter Symptom Feedback";
lblTitle.Text = "Enter Symptom Feedback";
lblSubtutle.Text = "Please enter your feedback";
SymptomLabel.IsVisible = false;
txtSymptom.IsVisible = false;
SymptomFeedbackToAdd.Usersymptomid = symptom.Id;
symptomToAdd.Id = symptom.Id;
SymptomFeedbackToAdd.Description = symptom.Description;
txtSymptom.Text = symptom.Description;
btnAdd.Text = "Add Symptom Feedback";
ProvidingFeedback = true;
//CommunitySwitch.IsVisible = true;
}
PopulateSymptomAutoComplete();
}
public AddSymptom(UserSymptomView symptom, bool isFeedback)
{
InitializeComponent();
manager = SymptomsManager.DefaultManager; //intiialise the Azure Symptom class
weathermanager = WeatherManager.DefaultManager;
remedymanager = RemedyManager.DefaultManager;
imagemanager = ImagesManager.DefaultManager;
usersymptommanager = UserSymptomManager.DefaultManager;
//RemedyPicker.SelectedIndexChanged += RemedyPicker_SelectedIndexChanged;
symptomfeedbackmanager = SymptomFeedbackManager.DefaultManager;
autoComplete.IsVisible = false;
lblSearchForaSymptom.IsVisible = false;
GetCorrectiveActions();
Device.BeginInvokeOnMainThread(action: async () =>
{
Uri ImgSource = await App.GetImage("sym");
img.Source = ImgSource;
});
GetUserSymptoms();
if (isFeedback == true)
{
this.Title = "Enter Symptom Feedback";
lblTitle.Text = "Enter Symptom Feedback";
lblSubtutle.Text = "Please enter your feedback";
SymptomLabel.IsVisible = false;
txtSymptom.IsVisible = false;
SymptomFeedbackToAdd.Usersymptomid = symptom.Usersymptomid;
SymptomFeedbackToAdd.Description = symptom.Description;
txtSymptom.Text = symptom.Description;
btnAdd.Text = "Add Symptom Feedback";
ProvidingFeedback = true;
//CommunitySwitch.IsVisible = true;
}
PopulateSymptomAutoComplete();
autoComplete.IsVisible = false;
SymptomLabel.Text = symptom.Description;
txtSymptom.IsVisible = false;
var userSymptomToEdit = UserSymptoms.Where(Item => Item.Id == symptom.Usersymptomid);
}
public AddSymptom(Symptoms symptom, bool isFeedback, bool isNotification)
{
InitializeComponent();
manager = SymptomsManager.DefaultManager; //intiialise the Azure Symptom class
weathermanager = WeatherManager.DefaultManager;
remedymanager = RemedyManager.DefaultManager;
imagemanager = ImagesManager.DefaultManager;
//RemedyPicker.SelectedIndexChanged += RemedyPicker_SelectedIndexChanged;
symptomfeedbackmanager = SymptomFeedbackManager.DefaultManager;
usersymptommanager = UserSymptomManager.DefaultManager;
GetCorrectiveActions();
Device.BeginInvokeOnMainThread(action: async () =>
{
Uri ImgSource = await App.GetImage("sym");
img.Source = ImgSource;
});
GetUserSymptoms();
if (isNotification == true)
{
this.Title = "Enter Symptom Feedback";
lblTitle.Text = "Enter Symptom Feedback";
lblSubtutle.Text = "Please enter your feedback";
GetSymptomInfo(symptom.Id);
SymptomFeedbackToAdd.Usersymptomid = symptom.Id;
symptomToAdd.Id = symptom.Id;
btnAdd.Text = "Add Symptom Feedback";
ProvidingFeedback = true;
}
PopulateSymptomAutoComplete();
}
public async Task GetSymptomInfo(string id)
{
ObservableCollection<Symptoms> SymptomToFeedback = await manager.getSymptomFromID(id);
SymptomLabel.IsVisible = false;
txtSymptom.IsVisible = false;
SymptomFeedbackToAdd.Usersymptomid = SymptomToFeedback[0].Id;
SymptomFeedbackToAdd.Description = SymptomToFeedback[0].Description;
txtSymptom.Text = SymptomToFeedback[0].Description;
}
public AddSymptom(Symptoms symptom)
{
InitializeComponent();
manager = SymptomsManager.DefaultManager; //intiialise the Azure Symptom class
weathermanager = WeatherManager.DefaultManager;
remedymanager = RemedyManager.DefaultManager;
imagemanager = ImagesManager.DefaultManager;
usersymptommanager = UserSymptomManager.DefaultManager;
//RemedyPicker.SelectedIndexChanged += RemedyPicker_SelectedIndexChanged;
Device.BeginInvokeOnMainThread(action: async () =>
{
Uri ImgSource = await App.GetImage("sym");
img.Source = ImgSource;
});
GetUserSymptoms();
//Set Label Titles
lblTitle.Text = "Edit Symptom";
lblSubtutle.Text = "Edit your Symptom";
GetCorrectiveActions();
symptomToAdd = symptom;
txtSymptom.Text = symptom.Description;
Symptomfeedback.Text = symptom.Symptomfeedback;
RatingSlider.Value = symptom.Intensity;
PopulateSymptomAutoComplete();
}
public AddSymptom(usersymptom symptom)
{
InitializeComponent();
manager = SymptomsManager.DefaultManager; //intiialise the Azure Symptom class
weathermanager = WeatherManager.DefaultManager;
remedymanager = RemedyManager.DefaultManager;
imagemanager = ImagesManager.DefaultManager;
usersymptommanager = UserSymptomManager.DefaultManager;
symptomfeedbackmanager = SymptomFeedbackManager.DefaultManager;
//RemedyPicker.SelectedIndexChanged += RemedyPicker_SelectedIndexChanged;
Device.BeginInvokeOnMainThread(action: async () =>
{
Uri ImgSource = await App.GetImage("sym");
img.Source = ImgSource;
});
GetUserSymptoms();
//Set Label Titles
lblTitle.Text = "Edit Symptom";
lblSubtutle.Text = "Edit your Symptom";
GetCorrectiveActions();
SymptomToEdit = symptom;
txtSymptom.Text = symptom.Description;
//Symptomfeedback.Text = symptom.Symptomfeedback;
//RatingSlider.Value = symptom.Rating;
PopulateSymptomAutoComplete();
}
public AddSymptom(UserSymptomView symptom)
{
InitializeComponent();
manager = SymptomsManager.DefaultManager; //intiialise the Azure Symptom class
weathermanager = WeatherManager.DefaultManager;
remedymanager = RemedyManager.DefaultManager;
imagemanager = ImagesManager.DefaultManager;
usersymptommanager = UserSymptomManager.DefaultManager;
//RemedyPicker.SelectedIndexChanged += RemedyPicker_SelectedIndexChanged;
Device.BeginInvokeOnMainThread(action: async () =>
{
Uri ImgSource = await App.GetImage("sym");
img.Source = ImgSource;
});
GetUserSymptoms();
GetUserSymptomToEdit(symptom); //Set Label Titles
lblTitle.Text = "Edit Symptom";
lblSubtutle.Text = "Edit your Symptom";
GetCorrectiveActions();
//SymptomToEdit = symptom;
txtSymptom.Text = symptom.Description;
//Symptomfeedback.Text = symptom.Symptomfeedback;
//RatingSlider.Value = symptom.Rating;
PopulateSymptomAutoComplete();
autoComplete.IsVisible = false;
SymptomLabel.Text = symptom.Description;
txtSymptom.IsVisible = false;
lblSearchForaSymptom.IsVisible = false;
}
async void GetUserSymptomToEdit(UserSymptomView symptom)
{
ObservableCollection<usersymptom> SelectedSymptom = await usersymptommanager.getuserSymptomInfo(symptom.Usersymptomid);
SymptomToEdit = SelectedSymptom[0];
}
<summary>
Gets the corrective actions.
</summary>
<returns>The corrective actions.</returns>
async public Task GetCorrectiveActions()
{
CorrectiveAction blank = new CorrectiveAction();
blank.RemedyDesc = "";
ObservableCollection<CorrectiveAction> CorrectiveActions = new ObservableCollection<CorrectiveAction>();
CorrectiveActions = await remedymanager.GetUserRemedies();
CorrectiveActions.Insert(0, blank);
//RemedyPicker.ItemsSource = CorrectiveActions;
}
async void GetSymptomHistory()
{
var usersymptoms = await usersymptommanager.CurrentClient.InvokeApiAsync<IEnumerable<UserSymptomView>>("getusersyms?userid=" + Helpers.Settings.UserKey + "&isactive=0", System.Net.Http.HttpMethod.Get, null);
foreach (var item in usersymptoms)
{
SymptomHistoryIDs.Add(item.Symptomid);
}
}
async void btnAdd_Clicked(object sender, EventArgs e)
{
// CheckSymptomInHistory(AutoCompleteSymptomToAdd.Id);
//If the autocomplete is not empty - add that symptom to the user symptom table
if (AutoCompleteSymptomToAdd != null)
{
//If the user already has symptoms, loop through them to make sure that they are not adding a duplicate
if (UserSymptoms.Count > 0)
{
foreach (usersymptom item in UserSymptoms)
{
if (item.Symptomid == AutoCompleteSymptomToAdd.Id)
{
await DisplayAlert("Duplicate Symptom", "You already have recorded this symptom - please log feedback against it if needed", "OK");
return;
}
//Check if it is not active (i.e in SYmptom History)
else
{
UserSymptomToAdd.Symptomid = AutoCompleteSymptomToAdd.Id;
UserSymptomToAdd.UserID = Helpers.Settings.UserKey;
UserSymptomToAdd.Datetimeadded = DateTime.Now.ToString();
UserSymptomToAdd.IsActive = true;
try
{
await usersymptommanager.AddUserSymptom(UserSymptomToAdd);
await AddInitialFeedback(UserSymptomToAdd.Id);
//await DisplayAlert("Symptom Added", "Your Symptom has been added", "OK");
}
catch (Exception ex)
{
Analytics.TrackEvent("App Screen: " + Title + ": " + ex);
//await DisplayAlert("Error", ex.ToString(), "OK");
}
}
}
}
//if no symptoms are present (i.e the collection has a count of 0,just add the new usersymptom)
else
{
usersymptom UserSymptomToAdd = new usersymptom();
UserSymptomToAdd.Symptomid = AutoCompleteSymptomToAdd.Id;
UserSymptomToAdd.UserID = Helpers.Settings.UserKey;
UserSymptomToAdd.Datetimeadded = DateTime.Now.ToString();
UserSymptomToAdd.IsActive = true;
try
{
await usersymptommanager.AddUserSymptom(UserSymptomToAdd);
await AddInitialFeedback(UserSymptomToAdd.Id);
//await DisplayAlert("Symptom Added", "Your Symptom has been added", "OK");
}
catch (Exception ex)
{
Analytics.TrackEvent("App Screen: " + Title + ": " + ex);
//await DisplayAlert("Error", ex.ToString(), "OK");
}
}
}
//If the textbox isn't empty - check if the symptom exists in the autocompelete data collection
else if (txtSymptom.Text !=null)
{
foreach (symptom item in GlobalSymptoms)
{
if (item.Description == txtSymptom.Text)
{
await DisplayAlert("Symptom Exists in Database", "Please search for the symptom from the autocomplete box", "OK");
}
else
{
isNewSymptom = true;
}
}
if (isNewSymptom == true)
{
NewSymptomToAdd.Description = txtSymptom.Text;
NewSymptomToAdd.Symptomstatus = "pending";
try
{
await symmanager.AddSymptom(NewSymptomToAdd);
NewUserSymptomToAdd.UserID = Helpers.Settings.UserKey;
NewUserSymptomToAdd.Datetimeadded = DateTime.Now.ToString();
NewUserSymptomToAdd.Symptomid = NewSymptomToAdd.Id;
NewUserSymptomToAdd.IsActive = true;
try
{
await usersymptommanager.AddUserSymptom(NewUserSymptomToAdd);
await DisplayAlert("Symptom Added", "Your Symptom has been added", "OK");
//Our View Symptom API depends on a feedback item to be associated with the usersymptom, so we add a dummy one
await AddInitialFeedback(NewUserSymptomToAdd.Id);
}
catch (Exception ex)
{
await DisplayAlert("Error", ex.ToString(), "OK");
}
}
catch (Exception ex)
{
Analytics.TrackEvent("App Screen: " + Title + ": " + ex);
await DisplayAlert("Error", ex.ToString(), "OK");
}
}
}
//Determines Intensity
symptomToAdd.Rating = Convert.ToInt32(RatingSlider.Value);
SymptomFeedbackToAdd.Rating = RatingSlider.Value.ToString();
//Performs checks before adding to Azure table
if (ProvidingFeedback == true)
{
SymptomFeedbackToAdd.DateTime = DateTime.Now.ToString();
SymptomFeedbackToAdd.Description = txtSymptom.Text;
SymptomFeedbackToAdd.Symptomfeedback = Symptomfeedback.Text;
SymptomFeedbackToAdd.UserID = Helpers.Settings.UserKey;
/*if (RemedyPicker.SelectedIndex != -1)
{
var RemedyPicked = RemedyPicker.Items[RemedyPicker.SelectedIndex];
}*/
}
else
{
// symptomToAdd.Description = txtSymptom.Text;
SymptomFeedbackToAdd.Symptomfeedback = Symptomfeedback.Text;
symptomToAdd.UserID = Helpers.Settings.UserKey;
/*if (RemedyPicker.SelectedIndex != -1)
{
var RemedyPicked = RemedyPicker.Items[RemedyPicker.SelectedIndex];
}*/
}
try
{
if (ProvidingFeedback == true)
{
//if (CommunitySwitch.IsToggled == true)
//{
// SymptomFeedbackToAdd.Posttocommunity = true;
//}
//else
//{
// SymptomFeedbackToAdd.Posttocommunity = false;
//}
await symptomfeedbackmanager.AddSymptomfeedback(SymptomFeedbackToAdd);
await DisplayAlert("Symptom Feedback has been Added", "Your feedback has been added", "OK");
await Navigation.PushAsync(new newviewsymptom());
Navigation.RemovePage(this);
}
else
{
await manager.AddSymptom(symptomToAdd);
await DisplayAlert("Symptom Added", "Your symptom has been added", "OK");
await AddInitialFeedback(NewUserSymptomToAdd.Id);
await Navigation.PushAsync(new correctiveactionconfirmation());
Navigation.RemovePage(this);
}
if (ProvidingFeedback == true)
{
//Set the notification reminder period
//manager.SetSymptomReminder(TwentFourHours, Convert.ToInt32(symptomToAdd.Id), txtSymptom.Text);
manager.SetSymptomReminder(TwentFourHours, Convert.ToInt32(symptomToAdd.Id), symptomToAdd.Description);
}
//Saves the notifcation object to Azure
NotifcationToSave.Symptomid = symptomToAdd.Id;
NotifcationToSave.Userid = Helpers.Settings.UserKey;
NotifcationToSave.MessageType = notifications.MessageTypes.SymptomReminder;
NotifcationToSave.Notificationtime = DateTime.Now.Add(TwentFourHours).ToString();
GetCurrentWeather(symptomToAdd.Id);
}
catch (Exception ex)
{
Analytics.TrackEvent("App Screen: " + Title + ": " + ex);
//await DisplayAlert("Error", ex.ToString(), "OK");
}
}
async void CheckSymptomInHistory(string id)
{
foreach (string item in SymptomHistoryIDs)
{
if (id == item)
{
await DisplayAlert("Historical Symptom", "This symptom is in your history", "OK");
}
}
}
async Task AddInitialFeedback(string usersymptomid)
{
SymptomFeedback symptomFeedback = new SymptomFeedback();
symptomFeedback.Usersymptomid = usersymptomid;
symptomFeedback.Intensity = RatingSlider.Value.ToString();
symptomFeedback.UserID = Helpers.Settings.UserKey;
symptomFeedback.DateTime = DateTime.Now.ToString("dd/MM/yyyy HH:mm");
symptomFeedback.Datetimelimit = DateTime.Now.AddMinutes(30).ToString("g");
// symptomFeedback.Symptomfeedback = Symptomfeedback.Text.ToString();
try
{
await symptomfeedbackmanager.AddSymptomfeedback(symptomFeedback);
//We have to null the id so that we are not always updating the existing feedback item
symptomFeedback.Id = null;
}
catch (Exception ex)
{
Analytics.TrackEvent(ex.ToString());
}
}
答案 0 :(得分：0)
这是一堵代码墙，因此很难阅读。我看到很多重复的代码和同一功能的不同重载几乎都在做同一件事。无论如何，从我在您的async void btnAdd_Clicked(object sender, EventArgs e)方法中可以看到的问题回到问题所在。您遍历了用户已经必须查看的AutoCompleteSymptomToAdd征兆，但是不是重复的每个征兆都通过以下代码添加了AutoCompleteSymptonToAdd：
else
{
UserSymptomToAdd.Symptomid = AutoCompleteSymptomToAdd.Id;
UserSymptomToAdd.UserID = Helpers.Settings.UserKey;
UserSymptomToAdd.Datetimeadded = DateTime.Now.ToString();
UserSymptomToAdd.IsActive = true;
try
{
await usersymptommanager.AddUserSymptom(UserSymptomToAdd);
await AddInitialFeedback(UserSymptomToAdd.Id);
//await DisplayAlert("Symptom Added", "Your Symptom has been added", "OK");
}
catch (Exception ex)
{
Analytics.TrackEvent("App Screen: " + Title + ": " + ex);
//await DisplayAlert("Error", ex.ToString(), "OK");
}
}
我假设您想要的功能是仅在没有重复项时才添加新的症状。因此，else完成后，请删除foreach (usersymptom item in UserSymptoms)块并将其内容粘贴。这样，您可以保证没有重复项（因为如果有重复项，它会打到return），您可以自由地将其添加为新的症状。