Description
Xamarin application opens different Page upon NavigationPage.Pushaync().
NavigationPage.Asyncpush() is called within a ButtonClicked Method.
That different page used to be the one being pushed but it no longer is.
ViewModel.cs
private async void OnAboutUsClicked()
{
var modifiedContactUs = new ModifiedContactUs() { BackgroundColor = ResourceColourModel.BackgroundColor };
await Application.Current.MainPage.Navigation.PushAsync(modifiedContactUs);
}
ModifiedContactUs.xaml
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="Project.Views.Pages.ModifiedContact"
xmlns:mapObject="clr-namespace:Xamarin.Forms.Maps;assembly=Xamarin.Forms.Maps">
<ContentPage.Content>
<StackLayout>
<Grid BackgroundColor="white">
<mapObject:Map x:Name="mapId" HasZoomEnabled="True" MapType="Street">
</mapObject:Map>
</Grid>
</StackLayout>
</ContentPage.Content>
</ContentPage>
ModifiedContactUs.xaml.cs
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
namespace Project.Views.Pages
{
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class ModifiedContactUs : ContentPage
{
public ModifiedContactUs()
{
InitializeComponent();
}
}
ContactUs.xaml(The different Page)
<?xml version="1.0" encoding="utf-8" ?>
<customControl:CustomContentPage
xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:d="http://xamarin.com/schemas/2014/forms/design"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:map ="clr-namespace:Xamarin.Forms.Maps;assembly=Xamarin.Forms.Maps"
xmlns:ffimageloading="clr-namespace:FFImageLoading.Svg.Forms;assembly=FFImageLoading.Svg.Forms"
xmlns:customControl="clr-namespace:Project.CustomControls.Renderers"
xmlns:templates_navbar="clr-namespace:Project.Views.Templates.Menus"
xmlns:fontAwesome="clr-namespace:Project._Utilities"
mc:Ignorable="d"
x:Class="Project.Views.Pages.ContactUs"
>
<ContentPage.Content>
<StackLayout BackgroundColor="Transparent" Spacing="0">
<templates_navbar:NavBar DotMenu_IsVisible="False" BackButton_IsVisible="True"/>
<Grid BackgroundColor="white">
<Grid.RowDefinitions>
<RowDefinition Height=".33*"/>
<RowDefinition Height=".07*"/>
<RowDefinition Height=".6*"/>
</Grid.RowDefinitions>
<Grid Grid.Row="0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width=".7*"/>
<ColumnDefinition Width=".3*"/>
</Grid.ColumnDefinitions>
<StackLayout Grid.Column="0" Padding="10">
<StackLayout>
<Label
Text="Company Name"
FontAttributes="Bold"
FontSize="Medium"
FontFamily="Lato-Bold"
VerticalOptions="CenterAndExpand"
HorizontalOptions="StartAndExpand"
/>
<Label
Text="{Binding Address}"
FontFamily="Lato-Bold"
VerticalOptions="CenterAndExpand"
HorizontalOptions="StartAndExpand"
/>
</StackLayout>
<StackLayout>
<Label
Text="Opening Times"
FontAttributes="Bold"
FontSize="Medium"
FontFamily="Lato-Bold"
VerticalOptions="CenterAndExpand"
HorizontalOptions="StartAndExpand"
/>
<Label
x:Name="weekdays_lbl"
Text="{Binding Weekday}"
FontFamily="Lato-Bold"
VerticalOptions="CenterAndExpand"
HorizontalOptions="StartAndExpand"
/>
<Label
x:Name="weekend_lbl"
Text="{Binding Weekend}"
FontFamily="Lato-Bold"
VerticalOptions="CenterAndExpand"
HorizontalOptions="StartAndExpand"
/>
</StackLayout>
</StackLayout>
<StackLayout Grid.Column="1">
<StackLayout VerticalOptions="CenterAndExpand">
<Button
x:Name="CallUsBtn"
Text="Call Us"
TextColor="White"
BackgroundColor="{StaticResource PrimaryColour}"
FontFamily="Lato-Bold"
FontSize="12"
BorderWidth="2"
BorderColor="White"
Margin="1"
CornerRadius="22"
Command="{Binding PhoneCommand}"
/>
<Button
x:Name="MessageUsBtn"
Text="Message"
TextColor="White"
BackgroundColor="{StaticResource PrimaryColour}"
FontFamily="Lato-Bold"
FontSize="12"
BorderWidth="2"
BorderColor="White"
Margin="1"
CornerRadius="22"
Command="{Binding EmailCommand}"
/>
<Button
x:Name="RequestCallBack"
Text="Request CallBack"
TextColor="White"
BackgroundColor="{StaticResource AccentColour}"
FontFamily="Lato-Bold"
FontSize="11"
BorderWidth="2"
BorderColor="White"
Margin="1"
CornerRadius="22"
Command="{Binding CallbackCommand}"
/>
</StackLayout>
</StackLayout>
</Grid>
<Grid Grid.Row="1" Padding="5">
<Grid.ColumnDefinitions>
<ColumnDefinition Width=".25*"/>
<ColumnDefinition Width=".25*"/>
<ColumnDefinition Width=".25*"/>
<ColumnDefinition Width=".25*"/>
</Grid.ColumnDefinitions>
<StackLayout Grid.Column="0">
<Grid VerticalOptions="CenterAndExpand">
<Image
Source="{FontImage FontFamily={StaticResource MaterialFontFamily},
Glyph={x:Static fontAwesome:IconFonts.Facebook}, Color=#1877F2,Size=60}"
HeightRequest="80"
/>
<Button Clicked="SocialMediaBtnHandler" BackgroundColor="Transparent" Margin="5, 0" CommandParameter="facebook"/>
</Grid>
</StackLayout>
<StackLayout Grid.Column="1">
<Grid VerticalOptions="CenterAndExpand">
<Image
Source="{FontImage FontFamily={StaticResource MaterialFontFamily},
Glyph={x:Static fontAwesome:IconFonts.Twitter}, Color=#00ACED, Size=60}"/>
<Button Clicked="SocialMediaBtnHandler" BackgroundColor="Transparent" Margin="5, 0" CommandParameter="twitter"/>
</Grid>
</StackLayout>
<StackLayout Grid.Column="2">
<Grid VerticalOptions="CenterAndExpand">
<Image
Source="{FontImage FontFamily={StaticResource MaterialFontFamily},
Glyph={x:Static fontAwesome:IconFonts.Linkedin}, Color=#0E76A8, Size=60}"/>
<Button Clicked="SocialMediaBtnHandler" BackgroundColor="Transparent" Margin="5, 0" CommandParameter="linkedIn"/>
</Grid>
</StackLayout>
<StackLayout Grid.Column="3">
<Grid VerticalOptions="CenterAndExpand" Padding="2">
<ffimageloading:SvgCachedImage
Source="social_logo_instagram.png"
HeightRequest="40"/>
<Button Clicked="SocialMediaBtnHandler" BackgroundColor="Transparent" Margin="5, 0" CommandParameter="instagram"/>
</Grid>
</StackLayout>
</Grid>
<Grid Grid.Row="2">
<Grid>
<StackLayout Grid.Row="0" Padding="5">
<map:Map x:Name="mapObject" HasZoomEnabled="True" MapType="Street">
<map:Map.ItemTemplate>
<DataTemplate>
<map:Pin
Position="{Binding Position}"
Address="{Binding Address}"
Label="{Binding PlaceName}"
/>
</DataTemplate>
</map:Map.ItemTemplate>
</map:Map>
</StackLayout>
</Grid>
</Grid>
</Grid>
<AbsoluteLayout BackgroundColor="Red" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" AbsoluteLayout.LayoutBounds="0, 0, 1, 1" AbsoluteLayout.LayoutFlags="SizeProportional">
</AbsoluteLayout>
</StackLayout>
</ContentPage.Content>
</customControl:CustomContentPage>
ContactUs.xaml.cs (The different page)
using Project._SharedData;
using Project.CustomControls.Renderers;
using Project.Models;
using Project.ViewModels;
using Rg.Plugins.Popup.Services;
using System;
using Xamarin.Essentials;
using Xamarin.Forms;
using Xamarin.Forms.Maps;
using Xamarin.Forms.Xaml;
namespace Project.Views.Pages
{
[XamlCompilation(XamlCompilationOptions.Compile)]
[System.ComponentModel.DesignTimeVisible(false)]
public partial class ContactUsPage : CustomContentPage
{
ContactUsVM _ContactUsVM;
public ContactUsPage()
{
InitializeComponent();
BindingContext = _ContactUsVM = new ContactUsVM();
initMap();
configureDisplay();
setFontOpeningTime();
}
protected override void OnAppearing()
{
base.OnAppearing();
_ContactUsVM.OnAppearing();
configureDisplay();
}
protected override void OnDisappearing()
{
base.OnDisappearing();
_ContactUsVM.OnDisappearing();
try
{
if (PopupNavigation.Instance != null)
PopupNavigation.Instance.PopAsync(true);
}
catch (Exception) { }
}
private void setFontOpeningTime()
{
DayOfWeek day = DateTime.Now.DayOfWeek;
// Set the font based on whether current day is weekday or weekend
if ((day == DayOfWeek.Saturday) || (day == DayOfWeek.Sunday))
{
weekend_lbl.FontAttributes = FontAttributes.Bold;
}
else
{
weekdays_lbl.FontAttributes = FontAttributes.Bold;
}
}
private void configureDisplay()
{
if (!string.IsNullOrEmpty(SharedPrefs.UserSessionEmail))
{
RequestCallBack.IsVisible = true;
MessageUsBtn.Text = "Email";
}
else
{
RequestCallBack.IsVisible = false;
MessageUsBtn.Text = "Message";
}
}
private async void SocialMediaBtnHandler(object sender, EventArgs e)
{
string socialMediaName = (sender as Button).CommandParameter.ToString().ToLower();
await Launcher.OpenAsync(SocialMediaModel.WebLink(socialMediaName));
}
private void initMap()
{
try
{
double latitude = Convert.ToDouble(SharedData.CompanyDetailsList[0].Latitude);
double longitude = Convert.ToDouble(SharedData.CompanyDetailsList[0].Longitude);
mapObject.MoveToRegion(MapSpan.FromCenterAndRadius(new Position(latitude, longitude), Distance.FromMeters(100)));
mapObject.ItemsSource = SharedData.CompanyDetailsList;
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
}
}
Expected behavior
To navigate to a new Page named ModifiedContactUs
Actual behavior:
Navigates to page called named ContactUs
Basic Information:
Android Build:
-minimum level 21
-Target level 30
Devices:
-Huawei Y6 2019
-API level 29
-Pixel 5
-API level 30
Notes
This question is different to from the first question I asked recently (Where the device crashes). This is behavior happens on all devices I test on except the one from that first question
CodePudding user response：
Expected behavior To navigate to a new Page named ModifiedContactPage
Actual behavior: Navigates to page called named ContactUsPage
From your code I saw you just push to ModifiedContactUs not ModifiedContactPage .
var modifiedContactUs = new ModifiedContactUs() { BackgroundColor = ResourceColourModel.BackgroundColor };
await Application.Current.MainPage.Navigation.PushAsync(modifiedContactUs);
Suggestion
Try to add breakpoint to see if it triggers button click event es expected .
Delete the old class and try again .
Delete the app from the device and try again .
CodePudding user response：
This worked: Clone the repo into a new folder as a new project and copy the files and changes to this new repo.
Attempted configuration solutions that did not work: Restarting visual studio. Untick and Tick Debug Mode. Untick and tick Deploy in Configuration Manager under Build. In Android Properties> android Options making sure debugging is checked and debugger is Xamarin.