I'm creating a CollectionView in .net MAUI where i'm using Frame control inside the data template. As a result of that, when I tap directly on the item, the SelectionChanged method is not being triggered and will trigger only if I click on the frame border or outside of it. Below sample code and picture. Is this a bug in MAUI or I'm doing something wrong? I had the same setup in Xamarin and it was working with no issues.
XAML
<CollectionView x:Name="scheduleItemsCollection"
SelectionChanged="scheduleItemsCollection_SelectionChanged"
SelectionMode="Single"
>
<CollectionView.ItemsLayout>
<GridItemsLayout Orientation="Vertical"
Span="2"
/>
</CollectionView.ItemsLayout>
<CollectionView.ItemTemplate>
<DataTemplate>
<Grid Padding="5" RowSpacing="0">
<Frame CornerRadius="40" BorderColor="Gray">
<StackLayout Spacing="0" BackgroundColor="White">
<Label Text="{Binding bookingDayArabic}" />
<Label Text="{Binding bookingDateD}" />
<StackLayout Orientation="Horizontal">
<Label Text="{Binding slotsAvailable}" HorizontalOptions="CenterAndExpand" />
<Label Text="عدد الطلبات:"/>
</StackLayout>
</StackLayout>
</Frame>
</Grid>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
Yes, it is the case as you said. Thanks for your support and feedback for maui.
I have created a new issue about this problem.
You can follow it up here: https://github.com/dotnet/maui/issues/9567.
Have a nice day.
This worked for me:
<Frame.GestureRecognizers>
<TapGestureRecognizer Tapped="Section_Tapped"/>
</Frame.GestureRecognizers>
Related
I am beginer on Xamarin. What did I do wrong here. I am trying to add Conext Menu to ListView and compiler is not happy with this.
<ListView x:Name="VehicleList">
<ListView.ItemTemplate>
<DataTemplate>
<ImageCell
ImageSource="152x152#1x.png"
Text="{Binding Title}"
Detail="{Binding SubTitle}"
TextColor="#f35e20"
DetailColor="#503026" />
<!-- adding this caused error
<ViewCell>
<ViewCell.ContextActions>
<MenuItem Clicked="OnDelete" CommandParameter="{Binding .}"
Text="Archive"
IsDestructive="True" />
</ViewCell.ContextActions>
</ViewCell>
-->
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
You are defining two viewcells in one data template. this is not possible!
You should create a DataTemplateSelector and declare the ViewCells in separate classes. Then you can make the selector choose a viewcell based on the logic implemented in the DataTemplateSelector. The xamarin documentation has a nice explanation: https://developer.xamarin.com/guides/xamarin-forms/application-fundamentals/templates/data-templates/selector/
I've got a mockup with a screen I don't know how to implement properly:
I'm wondering how to position that Login button (and the "sign in with" block). Without "Login", it would be quite easy with a StackLayout. But this makes it less easy and I'm searching for a simple solution.
I presume it's feasible with an AbsoluteLayout with position calculations in the codebehind, but that makes the whole page more complicated than it looks.
The white block is a Frame that's used everywhere in the app. It's not specific to the login page, so I want to reuse it elsewhere.
How would you do that?
I think you can use a Grid... with 3 rows.
Rows 1 and 2 have the same height.
"Login data" (User/pwd...) occupy row 0 and 1
Button occupy row 2 and 2
For Example
<?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="fev_ventilazione_smartwatch.Pages.MyPageTest">
<ContentPage.Content>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="8*"/>
<RowDefinition Height="1*"/>
<RowDefinition Height="1*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="4*" />
<ColumnDefinition Width="2*" />
<ColumnDefinition Width="4*" />
</Grid.ColumnDefinitions>
<Label Text="TEXT" Grid.Row="0" Grid.Column="0" Grid.RowSpan="2" Grid.ColumnSpan="3" BackgroundColor="Aqua"/>
<Button Text="BUTTON" Grid.Row="1" Grid.Column="1" Grid.RowSpan="2" BackgroundColor="Fuchsia"/>
</Grid>
</ContentPage.Content>
</ContentPage>
Produce
I presume it's feasible with an AbsoluteLayout with position
calculations in the codebehind, but that makes the whole page more
complicated than it looks.
Yes you are right. It is feasible with AbsoluteLayout. But its not as complicated as it seems.
Construct your basic elements first:
White container/StackLayout for login details
Login Button.
Facebook/Google buttons in a horizontal StackLayout.
"OR" Label
"Create An Account" Button
Put them in AbsoluteLayout and define their AbsoluteLayout.LayoutFlags as well as AbsoluteLayout.LayoutBounds.
Now key here is to understand that how Absolute Layout works?
You can find that out from this page: Absolute Layout
I have wrote some code to achieve something similar below. But make sure you learn it fully and understand everything before you can use it in your app:
<ContentPage.Content>
<ScrollView BackgroundColor="Silver">
<AbsoluteLayout Margin="30" >
<StackLayout BackgroundColor="White" HeightRequest="150" Spacing="20" Padding="10" VerticalOptions="FillAndExpand"
AbsoluteLayout.LayoutBounds="0,0,1,250" AbsoluteLayout.LayoutFlags="XProportional,YProportional,WidthProportional"
>
<Entry Text="Login" HeightRequest="30"/>
<Entry Text="Password" HeightRequest="30" IsPassword="true" />
<Label Text="FORGOT YOUR PASSOWORD?" HorizontalTextAlignment="End"/>
</StackLayout>
<Button
Text="LOGIN"
FontAttributes="Bold"
BackgroundColor="Maroon"
TextColor="White"
HeightRequest="70"
WidthRequest="70"
AbsoluteLayout.LayoutBounds=".5,215,70,70" AbsoluteLayout.LayoutFlags="XProportional" BorderRadius="35"
/>
<StackLayout
Orientation="Horizontal"
HorizontalOptions="EndAndExpand"
AbsoluteLayout.LayoutBounds="1,270,0.5,70" AbsoluteLayout.LayoutFlags="XProportional,WidthProportional"
>
<Button Text="Facebook"/>
<Button Text="Google"/>
</StackLayout>
<Label Text="OR" HorizontalTextAlignment="Center"
AbsoluteLayout.LayoutBounds="0.5,350,50,50"
AbsoluteLayout.LayoutFlags="XProportional"
/>
<Button
Text="CREATE AN ACCOUNT" Margin="15"
BackgroundColor="White" TextColor="Maroon"
BorderColor="Maroon" BorderWidth="1"
BorderRadius="0"
HorizontalOptions="FillAndExpand"
AbsoluteLayout.LayoutBounds="0.5,370,1,150"
AbsoluteLayout.LayoutFlags="XProportional,WidthProportional"
/>
</AbsoluteLayout>
</ScrollView>
</ContentPage.Content>
And here is the result:
NOTE: You can achieve the same look using RelativeLayout as well.
Hope this helps.
I'm trying to place a Button within the ItemTemplate of an AutoSuggestBox. However, it doesn't work as the Button's Click event is never triggered. I'm guessing it's because of the AutoSuggestBox loosing focus when the Button is pressed and thus the event is canceled?!
Any suggestions on how to get this to work?
<Grid>
<AutoSuggestBox TextChanged="AutoSuggestBox_TextChanged">
<AutoSuggestBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Title}"/>
<Button Content="Add" Click="Button_Click"/>
</StackPanel>
</DataTemplate>
</AutoSuggestBox.ItemTemplate>
</AutoSuggestBox>
</Grid>
I fat fingered something when hitting debug and now I am stuck in this view.
Ive never seen it before, have no idea how I did it and would LOVE to know how to undo it.
Mind you this is a Windows Phone 8 app.
<phone:PhoneApplicationPage
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:UI="clr-namespace:Microsoft.Advertising.Mobile.UI;assembly=Microsoft.Advertising.Mobile.UI"
x:Class="mycuts.MainPage"
mc:Ignorable="d"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
SupportedOrientations="Portrait" Orientation="Portrait"
shell:SystemTray.IsVisible="True">
<phone:PhoneApplicationPage.ApplicationBar>
<shell:ApplicationBar>
<shell:ApplicationBarIconButton x:Name="add" Text="add" IconUri="/images/add.png"/>
<shell:ApplicationBarIconButton x:Name="del" Text="delete" IconUri="/images/minus.png"/>
</shell:ApplicationBar>
</phone:PhoneApplicationPage.ApplicationBar>
<Grid x:Name="LayoutRoot" Background="Transparent">
<!--TitlePanel contains the name of the application and page title-->
<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
<TextBlock Text="RT APPS" Style="{StaticResource PhoneTextNormalStyle}" Margin="12,0"/>
<TextBlock Text="My Cuts" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
</StackPanel>
<Grid x:Name="ContentPanel" Margin="0,161,0,0">
<StackPanel Orientation="Vertical">
<ListBox x:Name="cutsList" Height="451"/>
<!--<UI:AdControl ApplicationId="test_client" AdUnitId="Image480_80" HorizontalAlignment="Left" Height="80" VerticalAlignment="Top" Width="480"/>-->
</StackPanel>
</Grid>
</Grid>
</phone:PhoneApplicationPage>
Sometimes the Blend or Visual Studio 2012/2013 Designer can go wacky like that. You can do one of two things:
Close and Reopen the XAML page
Shut down and reopen Visual Studio
Usually the first option fixes it for me, but the second one always does.
Happy coding!
Visual Studio 2012 Project with memory leak
Hello!
I've found a memory leak when using Interaction Triggers in the MVVM Light Toolkit.
I use this xaml
<UserControl x:Class="MemoryLeakTest.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:ignore="http://www.ignore.com"
mc:Ignorable="d ignore"
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
xmlns:mvvm="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.SL5"
x:Name="control"
DataContext="{Binding Main, Source={StaticResource Locator}}">
<Grid x:Name="LayoutRoot">
<ItemsControl ItemsSource="{Binding LeakObjects}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Border Width="300" BorderThickness="6" BorderBrush="BlueViolet" CornerRadius="3">
<Grid Background="{Binding ColorBrush}" >
<StackPanel>
<Button Command="{Binding ElementName=control, Path=DataContext.Command}" Width="100" Height="40" Content="Tryck!">
<i:Interaction.Triggers>
<i:EventTrigger EventName="Click">
<mvvm:EventToCommand Command="{Binding ElementName=control, Path=DataContext.Command}" CommandParameter="{Binding}"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</Button>
<TextBlock Text="{Binding Text}"/>
</StackPanel>
</Grid>
</Border>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Grid>
and then i rebind the list LeakObjects so that it creates new items.
The old items (xaml) like buttons and text blocks are still in memory and doesn't GC.
If I write
<Button Command="{Binding ElementName=control, Path=DataContext.Command}" Width="100" Height="40" Content="Press!"/>
and use the buttons Command parameter there is no memory leak but if I use the
<i:Interaction.Triggers>
<i:EventTrigger EventName="Click">
<mvvm:EventToCommand Command="{Binding ElementName=control, Path=DataContext.Command}" CommandParameter="{Binding}"/>
</i:EventTrigger>
</i:Interaction.Triggers>
there is a major leak.
The problem is that there are no Command parameters on grids etc.
The project in the link has this very simple project demonstrating the problem.
Is there a way to circumvent the memory leak? Maybe I'm using it wrong.
It is crucial that I find a way to fix this because this memory leak is all over our application.
I've experienced this leak as well. I've solved it by not using the EventToCommands and rather using just plain event handlers and calling the commands from these methods in page code-behind. It's not that clean, but it works and the page is Garbage Collected as expected.
Or you could use InvokeCommandAction instead, works for me.
http://www.dotnetpatterns.net/entries/21-Memory-Leak-issue-with-EventToCommand-passing-binding-to-RelayCommand