Come creare un evento click sull'etichetta nei moduli xamarin dinamicamente

Sto lavorando su un'applicazione cross platform xamarin e voglio creare un'etichetta hyperlink per "Password dimenticata?" sulla pagina di accesso. Ho usato il seguente codice per creare l'etichetta ma non so come creare eventi onclick su di esso.Come creare un evento click sull'etichetta nei moduli xamarin dinamicamente

MainPage = new ContentPage 
      { 
       BackgroundImage = "background.png", 
       Content = new StackLayout 
       { 
        VerticalOptions = LayoutOptions.CenterAndExpand, 
        HorizontalOptions = LayoutOptions.CenterAndExpand, 
        Spacing = 50, 
        Children = { 

         new Label { 
          HorizontalTextAlignment = TextAlignment.Center, 
          Text = "Welcome, Please Sign in!", 
          FontSize=50, 
          TextColor=Color.Gray, 
         }, 


         new Entry 
         { 
          Placeholder="Username", 
          VerticalOptions = LayoutOptions.Center, 
          Keyboard = Keyboard.Text, 
          HorizontalOptions = LayoutOptions.Center, 
          WidthRequest = 350, 
          HeightRequest = 50, 
          FontSize=20, 
          TextColor=Color.Gray, 
          PlaceholderColor=Color.Gray, 
         }, 

          new Entry 
         { 
          Placeholder="Password", 
          VerticalOptions = LayoutOptions.Center, 

          Keyboard = Keyboard.Text, 
          HorizontalOptions = LayoutOptions.Center, 
          WidthRequest = 350, 
          HeightRequest = 50, 
          FontSize=25, 
          TextColor=Color.Gray, 
          IsPassword=true, 
           PlaceholderColor =Color.Gray, 
         }, 
         new Button 
         { 
          Text="Login", 
          FontSize=Device.GetNamedSize(NamedSize.Large,typeof(Button)), 
          HorizontalOptions=LayoutOptions.Center, 
          VerticalOptions=LayoutOptions.Fill, 
          WidthRequest=350, 
          TextColor=Color.Silver, 
          BackgroundColor=Color.Red, 
          BorderColor=Color.Red, 
         }, 
         new Label //for this label I want to create click event to open new page 
         { 
          Text="Forgot Password?", 
          FontSize=20, 
          TextColor=Color.Blue, 
          HorizontalOptions=LayoutOptions.Center, 

         }, 
        } 
     } 
      };

fonte

2016-03-05 Dipak

Prova questo:

 var forgetPasswordLabel = new Label // Your Forget Password Label 
     { 
      Text = "Forgot Password?", 
      FontSize = 20, 
      TextColor = Color.Blue, 
      HorizontalOptions = LayoutOptions.Center, 
     }; 


     // Your label tap event 
     var forgetPassword_tap = new TapGestureRecognizer(); 
     forgetPassword_tap.Tapped += (s,e) => 
     { 
      // 
      // Do your work here. 
      // 
     }; 
     forgetPasswordLabel.GestureRecognizers.Add(forgetPassword_tap);

Esempio:

 var forgetPasswordLabel = new Label // Your Forget Password Label 
     { 
      Text = "Forgot Password?", 
      FontSize = 20, 
      TextColor = Color.Blue, 
      HorizontalOptions = LayoutOptions.Center, 
     }; 

     MainPage = new ContentPage 
     { 
      BackgroundImage = "background.png", 
      Content = new StackLayout 
      { 
       VerticalOptions = LayoutOptions.CenterAndExpand, 
       HorizontalOptions = LayoutOptions.CenterAndExpand, 
       Spacing = 50, 
       Children = { 

        new Label { 
         //HorizontalTextAlignment = TextAlignment.Center, 
         Text = "Welcome, Please Sign in!", 
         FontSize=50, 
         TextColor=Color.Gray, 
        }, 


        new Entry 
        { 
         Placeholder="Username", 
         VerticalOptions = LayoutOptions.Center, 
         Keyboard = Keyboard.Text, 
         HorizontalOptions = LayoutOptions.Center, 
         WidthRequest = 350, 
         HeightRequest = 50, 
         FontSize=20, 
         TextColor=Color.Gray, 
         PlaceholderColor=Color.Gray, 
        }, 

        new Entry 
        { 
         Placeholder="Password", 
         VerticalOptions = LayoutOptions.Center, 

         Keyboard = Keyboard.Text, 
         HorizontalOptions = LayoutOptions.Center, 
         WidthRequest = 350, 
         HeightRequest = 50, 
         FontSize=25, 
         TextColor=Color.Gray, 
         IsPassword=true, 
         PlaceholderColor =Color.Gray, 
        }, 
        new Button 
        { 
         Text="Login", 
         FontSize=Device.GetNamedSize(NamedSize.Large,typeof(Button)), 
         HorizontalOptions=LayoutOptions.Center, 
         VerticalOptions=LayoutOptions.Fill, 
         WidthRequest=350, 
         TextColor=Color.Silver, 
         BackgroundColor=Color.Red, 
         BorderColor=Color.Red, 
        }, 
        forgetPasswordLabel 
       } 
      } 
     }; 

     var forgetPassword_tap = new TapGestureRecognizer(); 
     forgetPassword_tap.Tapped += (s,e) => 
     { 
      // 
      // Do your work here. 
      // 
     }; 
     forgetPasswordLabel.GestureRecognizers.Add(forgetPassword_tap);

fonte

2016-03-05 07:31:46 Vaikesh

MyClickyLabel.GestureRecognizers.Add(
    new TapGestureRecognizer() { 
     Command = new Command(() => { 
      /* Handle the click here */ 
     }) 
    } 
);

fonte

2016-07-16 21:32:04 noelicus

Ci dispiace, ma questo codice non funziona per me, quale potrebbe essere la ragione? 'lblLogin.GestureRecognizers.Add (new TapGestureRecognizer() {Command = new Command (() => {lblLogin_Clicked();})});' 'void async privato lblLogin_Clicked() {Attendi Navigation.PushAsync (new LoginPage()); ' –

Cosa succede se non si esegue lblLogin async? Oppure fai il comando asincrono e attendi su lblLogin? – noelicus

Per le persone che preferiscono utilizzare XAML e che amano legarsi comando direttamente al ViewModel, è possibile utilizzare this:

<Label HorizontalOptions="Center" 
     TextColor="Blue" 
     FontSize="20" 
     Text="Forgot Password?"> 
    <Label.GestureRecognizers> 
     <TapGestureRecognizer Command="{Binding ForgotPasswordCommand}" /> 
    </Label.GestureRecognizers> 
</Label>

fonte

2017-11-08 21:55:27 Mik

Come creare un evento click sull'etichetta nei moduli xamarin dinamicamente

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