Prescott Chartier's questions

Eu reduzi o problema a algo no meu Flyoutcódigo xaml do menu, mas não consigo identificar a causa. Meu xaml:

        <VerticalStackLayout
            x:Name="Flyout"
            WidthRequest="260"
            HorizontalOptions="Start"
            Spacing="2"
            Grid.Row="1"
            BackgroundColor="Gold"
            TranslationX="-250">
            <HorizontalStackLayout HorizontalOptions="Start" HeightRequest="50" >
                <Image Source="addEmployee.jpg" Style="{StaticResource IconLabelStyle}" />
                <Label x:Name="AddEmployee" Text="Add Employee" Style="{StaticResource LabelStyle}" />
                <HorizontalStackLayout.GestureRecognizers>
                    <TapGestureRecognizer Tapped="OnMenuItemTap" CommandParameter="Add Another Participant"/>
                </HorizontalStackLayout.GestureRecognizers>
            </HorizontalStackLayout>
            <HorizontalStackLayout HorizontalOptions="Start" HeightRequest="50">
                <Image Source="assign.jpg" Style="{StaticResource IconLabelStyle}" />
                <Label x:Name="Assign" Text="Assign Employee To Section" Style="{StaticResource LabelStyle}" />
                <HorizontalStackLayout.GestureRecognizers>
                    <TapGestureRecognizer Tapped="OnMenuItemTap" CommandParameter="Re-Register"/>
                </HorizontalStackLayout.GestureRecognizers>
            </HorizontalStackLayout>
            <HorizontalStackLayout HorizontalOptions="Start" HeightRequest="50">
                <Image Source="text.jpg" Style="{StaticResource IconLabelStyle}" />
                <Label x:Name="sendtext" Text="Send Text" Style="{StaticResource LabelStyle}" />
                <HorizontalStackLayout.GestureRecognizers>
                    <TapGestureRecognizer Tapped="OnMenuItemTap" CommandParameter="ChatRoom"/>
                </HorizontalStackLayout.GestureRecognizers>
            </HorizontalStackLayout>
            <HorizontalStackLayout HorizontalOptions="Start" HeightRequest="50">
                <Image Source="myaccount.jpg" Style="{StaticResource IconLabelStyle}" />
                <Label x:Name="MyAccount" Text="My Account" Style="{StaticResource LabelStyle}" />
                <HorizontalStackLayout.GestureRecognizers>
                    <TapGestureRecognizer Tapped="OnMenuItemTap" CommandParameter="My Account"/>
                </HorizontalStackLayout.GestureRecognizers>
            </HorizontalStackLayout>
            <HorizontalStackLayout HorizontalOptions="Start" HeightRequest="50">
                <Image Source="myaccount.jpg" Style="{StaticResource IconLabelStyle}" />
                <Label x:Name="LogOut" Text="Log Off" Style="{StaticResource LabelStyle}" />
                <HorizontalStackLayout.GestureRecognizers>
                    <TapGestureRecognizer Tapped="OnMenuItemTap" CommandParameter="Log Off"/>
                </HorizontalStackLayout.GestureRecognizers>
            </HorizontalStackLayout>
        </VerticalStackLayout>

Quando eu comento o Flyoutcódigo, o aplicativo rodará fora do depurador. Eu despejei o log de falhas do dispositivo de teste, encontrei isso nele:

03-05 20:52:00.570 10573  4825  4825 I MonoDroid: UNHANDLED EXCEPTION:
03-05 20:52:00.575 10573  4825  4825 I MonoDroid: Android.Runtime.JavaProxyThrowable: Exception of type 'Android.Runtime.JavaProxyThrowable' was thrown.
03-05 20:52:00.575 10573  4825  4825 I MonoDroid: 
03-05 20:52:00.575 10573  4825  4825 I MonoDroid:   --- End of managed Android.Runtime.JavaProxyThrowable stack trace ---
03-05 20:52:00.575 10573  4825  4825 I MonoDroid: android.runtime.JavaProxyThrowable: [System.InvalidCastException]: Specified cast is not valid.
03-05 20:52:00.575 10573  4825  4825 I MonoDroid:   at Microsoft.Maui.Controls.Xaml.ApplyPropertiesVisitor.SetPropertyValue + 0xb9(Unknown Source)
03-05 20:52:00.575 10573  4825  4825 I MonoDroid:   at Microsoft.Maui.Controls.Xaml.ApplyPropertiesVisitor.Visit + 0xf6(Unknown Source)
03-05 20:52:00.575 10573  4825  4825 I MonoDroid:   at Microsoft.Maui.Controls.Xaml.ElementNode.Accept + 0x90(Unknown Source)
03-05 20:52:00.575 10573  4825  4825 I MonoDroid:   at Microsoft.Maui.Controls.Xaml.ElementNode.Accept + 0x3e(Unknown Source)
03-05 20:52:00.575 10573  4825  4825 I MonoDroid:   at Microsoft.Maui.Controls.Xaml.ElementNode.Accept + 0x67(Unknown Source)
03-05 20:52:00.575 10573  4825  4825 I MonoDroid:   at Microsoft.Maui.Controls.Xaml.ElementNode.Accept + 0x67(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at Microsoft.Maui.Controls.Xaml.ElementNode.Accept + 0x67(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at Microsoft.Maui.Controls.Xaml.ElementNode.Accept + 0x67(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at Microsoft.Maui.Controls.Xaml.RootNode.Accept + 0x81(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at Microsoft.Maui.Controls.Xaml.XamlLoader.Visit + 0x97(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at Microsoft.Maui.Controls.Xaml.XamlLoader.Load + 0x9d(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at Microsoft.Maui.Controls.Xaml.XamlLoader.Load + 0x0(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at Microsoft.Maui.Controls.Xaml.XamlLoader.Load + 0x29(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at Microsoft.Maui.Controls.Xaml.Extensions.LoadFromXaml + 0x0(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at MyApp.RegUser.InitializeComponent + 0x1(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at MyApp.RegUser..ctor + 0xa0(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at MyApp.Logon+<SignOn>d__6.MoveNext + 0x7b6(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw + 0x11(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess + 0x37(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification + 0x2d(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd + 0x8(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at System.Runtime.CompilerServices.TaskAwaiter.GetResult + 0x0(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at MyApp.Logon+<<OnCounterClicked>b__5_0>d.MoveNext + 0x73(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw + 0x11(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess + 0x37(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification + 0x2d(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd + 0x8(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at System.Runtime.CompilerServices.TaskAwaiter.GetResult + 0x0(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at MyApp.Logon+<OnCounterClicked>d__5.MoveNext + 0xf4(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw + 0x11(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at System.Threading.Tasks.Task+<>c.<ThrowAsync>b__128_0 + 0x0(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at Android.App.SyncContext+<>c__DisplayClass2_0.<Post>b__0 + 0x0(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at Java.Lang.Thread+RunnableImplementor.Run + 0x8(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at Java.Lang.IRunnableInvoker.n_Run + 0x0(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PP_V + 0x5(Unknown Source)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at mono.java.lang.RunnableImplementor.n_run(Native Method)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at mono.java.lang.RunnableImplementor.run(RunnableImplementor.java:29)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at android.os.Handler.handleCallback(Handler.java:958)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at android.os.Handler.dispatchMessage(Handler.java:99)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at android.os.Looper.loopOnce(Looper.java:230)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at android.os.Looper.loop(Looper.java:319)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at android.app.ActivityThread.main(ActivityThread.java:9063)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at java.lang.reflect.Method.invoke(Native Method)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:588)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)
03-05 20:52:00.576 10573  4825  4825 I MonoDroid: 
03-05 20:52:00.576 10573  4825  4825 I MonoDroid:   --- End of managed Android.Runtime.JavaProxyThrowable stack trace ---

Um erro foi detectado nesta linhaSpecified cast is not valid. at Microsoft.Maui.Controls.Xaml.ApplyPropertiesVisitor.SetPropertyValue + 0xb9(Unknown Source)

Não vejo nenhuma informação ali que indique a exceção de elenco. Talvez outro par de olhos o faça.

Eu manipulo uma grade programaticamente definindo o número de linhas e colunas no código por trás com base no número de linhas em um conjunto de dados. Eu exibo uma imagem, rótulo e um botão na coluna da grade. O conjunto de dados com o qual estou trabalhando tem 2 linhas, então eu crio 1 linha com duas colunas na grade. Eu adiciono os controles dentro de uma VerticalStacklayoutlinha da grade especificando a linha e a coluna. No entanto, a grade é exibida com a coluna empilhada. Tudo o que tentei até agora não teve efeito. Eu também tenho um menu flyout definido na página que funciona perfeitamente. Meu xaml:

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="MyApp.DeptUser"
             x:DataType="Line"
             Title="DeptUser">
    <ContentPage.Resources>
        <ResourceDictionary>
            <Style x:Key="IconLabelStyle" TargetType="Label">
                <Setter Property="FontSize" Value="Medium" />
                <Setter Property="WidthRequest" Value="50" />
                <Setter Property="VerticalTextAlignment" Value="Center" />
                <Setter Property="HorizontalTextAlignment" Value="Center" />
                <Setter Property="TextColor" Value="Black" />
                <Setter Property="BackgroundColor" Value="Gold" />
            </Style>
            <Style x:Key="LabelStyle" TargetType="Label">
                <Setter Property="VerticalTextAlignment" Value="Center" />
                <Setter Property="Padding" Value="5,5" />
                <Setter Property="FontSize" Value="Medium" />
                <Setter Property="BackgroundColor" Value="Gold" />
            </Style>
        </ResourceDictionary>
    </ContentPage.Resources>
    <ScrollView>
        <Grid
            RowDefinitions="50,*" >
            <VerticalStackLayout
                Grid.Row = "0"
                BackgroundColor="Gold"
            >
                <Button
                Text="☰"
                FontSize="Medium"
                CornerRadius="0"
                HorizontalOptions="Start"
                WidthRequest="50"
                TextColor="Black"
                BackgroundColor="Gold" 
                Clicked="ShowFlyout"/>
            </VerticalStackLayout>
            <VerticalStackLayout
                Grid.Row="1"
                Padding="5,0"
                Spacing="10">
                <Image
                    Source="banner2.jpg"
                    HeightRequest="75"
                    Aspect="AspectFit"
                    SemanticProperties.Description="Company Personnel"
                />

                <Line Stroke="Black" X2="{Binding Width, Source={RelativeSource Self}}" HorizontalOptions="Fill" StrokeThickness="2" />

                <Label x:Name="lblNumberOfPersonnel"
                    Text="Personnel in your department:"
                    Style="{StaticResource Headline}"
                    TextColor="Blue"
                    HorizontalOptions="Center"
                    HeightRequest="25"
                    FontSize="16"
                    SemanticProperties.HeadingLevel="Level1"/>
                <Grid x:Name="MyCurrentEmployees">
                </Grid>
            </VerticalStackLayout>
            <Border
                x:Name="Overlay"
                IsVisible="false"
                Grid.Row="1"
                BackgroundColor="DarkGray"
                Opacity="0.8">
                <Border.GestureRecognizers>
                    <TapGestureRecognizer Tapped="OnOverlayTap"/>
                </Border.GestureRecognizers>
            </Border>
            <VerticalStackLayout
                x:Name="Flyout"
                WidthRequest="260"
                HorizontalOptions="Start"
                Spacing="2"
                Grid.Row="1"
                BackgroundColor="Gold"
                TranslationX="-250">
                <HorizontalStackLayout HorizontalOptions="Start" HeightRequest="50" >
                    <Image Source="addEmployee.jpg" Style="{StaticResource IconLabelStyle}" />
                    <Label x:Name="AddEmployee" Text="Add Employee" Style="{StaticResource LabelStyle}" />
                    <HorizontalStackLayout.GestureRecognizers>
                        <TapGestureRecognizer Tapped="OnMenuItemTap" CommandParameter="Add Another Participant"/>
                    </HorizontalStackLayout.GestureRecognizers>
                </HorizontalStackLayout>
                <HorizontalStackLayout HorizontalOptions="Start" HeightRequest="50">
                    <Image Source="assign.jpg" Style="{StaticResource IconLabelStyle}" />
                    <Label x:Name="Assign" Text="Assign Employee To Section" Style="{StaticResource LabelStyle}" />
                    <HorizontalStackLayout.GestureRecognizers>
                        <TapGestureRecognizer Tapped="OnMenuItemTap" CommandParameter="Re-Register"/>
                    </HorizontalStackLayout.GestureRecognizers>
                </HorizontalStackLayout>
                <HorizontalStackLayout HorizontalOptions="Start" HeightRequest="50">
                    <Image Source="text.jpg" Style="{StaticResource IconLabelStyle}" />
                    <Label x:Name="sendtext" Text="Send Text" Style="{StaticResource LabelStyle}" />
                    <HorizontalStackLayout.GestureRecognizers>
                        <TapGestureRecognizer Tapped="OnMenuItemTap" CommandParameter="ChatRoom"/>
                    </HorizontalStackLayout.GestureRecognizers>
                </HorizontalStackLayout>
                <HorizontalStackLayout HorizontalOptions="Start" HeightRequest="50">
                    <Image Source="myaccount.jpg" Style="{StaticResource IconLabelStyle}" />
                    <Label x:Name="MyAccount" Text="My Account" Style="{StaticResource LabelStyle}" />
                    <HorizontalStackLayout.GestureRecognizers>
                        <TapGestureRecognizer Tapped="OnMenuItemTap" CommandParameter="My Account"/>
                    </HorizontalStackLayout.GestureRecognizers>
                </HorizontalStackLayout>
                <HorizontalStackLayout HorizontalOptions="Start" HeightRequest="50">
                    <Image Source="myaccount.jpg" Style="{StaticResource IconLabelStyle}" />
                    <Label x:Name="LogOut" Text="Log Off" Style="{StaticResource LabelStyle}" />
                    <HorizontalStackLayout.GestureRecognizers>
                        <TapGestureRecognizer Tapped="OnMenuItemTap" CommandParameter="Log Off"/>
                    </HorizontalStackLayout.GestureRecognizers>
                </HorizontalStackLayout>
            </VerticalStackLayout>
        </Grid>
    </ScrollView>
</ContentPage>

A grade com a qual estou tendo problemas é MyCurrentEmployees. Meu código:

protected override async void OnAppearing()
{
    myCurrentemployees = Utils.ToDataSet(myService.GetEmployeeNames(MyUser.Username, MyUser.Password));
    for (int x = 0; x < myCurrentemployees.Tables[0].Rows.Count/2; x+=2)
    {
        MyCurrentEmployees.RowDefinitions.Add(new RowDefinition());
    }

    ColumnDefinition c1 = new ColumnDefinition();
    c1.Width = new GridLength(50, GridUnitType.Star);
    ColumnDefinition c2 = new ColumnDefinition();
    c2.Width = new GridLength(50, GridUnitType.Star);
    MyCurrentEmployees.ColumnDefinitions.Add(c1);
    MyCurrentEmployees.ColumnDefinitions.Add(c2);

    foreach (DataRow MyDataRow in myCurrentemployees.Tables[0].Rows)
    {
        Image Myimage = new Image();
        Myimage.HeightRequest = 150;
        Myimage.WidthRequest = 150;
        byte[] imageArray = new byte[1];

        MyPhotoDataSet = Utils.ToDataSet(myService1.GetPhoto(MyUser.Username, MyUser.Password, MyDataRow["EmployeeID"].ToString()));
        if (MyPhotoDataSet.Tables[0].Rows[0][0].ToString() != null)
        {
            imageArray = (byte[])MyPhotoDataSet.Tables[0].Rows[0][0];
        }
        else
        {
            MyPhotoDataSet = Utils.ToDataSet(myService.GetDummyPhoto(MyUser.Username, MyUser.Password));
            imageArray = (byte[])MyPhotoDataSet.Tables[0].Rows[0][0];
        }
        MemoryStream memory = new MemoryStream(imageArray);
        Myimage.Source = Microsoft.Maui.Controls.ImageSource.FromStream(() => (Stream)memory);
        Label Mylabel = new Label();
        Mylabel.Text = MyDataRow["Name"].ToString();
        Mylabel.HorizontalTextAlignment = TextAlignment.Center;
        Mylabel.WidthRequest = 150;
        Button MyDeleteButton = new Button();
        MyDeleteButton.Text = "Delete Employee";
        MyDeleteButton.TextColor = Colors.Black;
        MyDeleteButton.FontAttributes = FontAttributes.Bold;
        MyDeleteButton.BackgroundColor = Colors.Gold;
        MyDeleteButton.WidthRequest = 150;
        VerticalStackLayout MyLayOut = new VerticalStackLayout();
        MyLayOut.Children.Add(Myimage);
        MyLayOut.Children.Add(Mylabel);
        MyLayOut.Children.Add(MyDeleteButton);
        MyCurrentParticipants.Add(MyLayOut, RowNumber, ColumnNumber);
        if (ColumnNumber == 1)
        {
            ColumnNumber = 0;
            RowNumber++;
        } else
        {
            ColumnNumber++;
        }
    }
}

Captura de tela:

O que estou fazendo errado?

Tenho a seguinte página de conteúdo definida:

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="OrganizeMyLeague.Subscription"
             x:DataType="Line"
             Title="Subscription">
    <VerticalStackLayout
            Padding="5,0"
            Spacing="5">

        <Label Text="Account Information"
            Style="{StaticResource Headline}"
            TextColor="Blue"
            HorizontalOptions="Center"
            SemanticProperties.HeadingLevel="Level1"/>
        
           <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="*" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="*" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="*" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="*" />
                    <RowDefinition Height="Auto" />
                    <RowDefinition Height="*" />
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="100" />
                <ColumnDefinition Width="250" />
            </Grid.ColumnDefinitions>
                <Label Grid.Row="0" Grid.Column="0" HorizontalTextAlignment="End" VerticalOptions="Center" Text="First Name" FontSize="16" TextColor="Black" HorizontalOptions="Start" />
                <Entry Grid.Row="0" Grid.Column="1" x:Name="txtFirstname" Placeholder="Enter First Name" PlaceholderColor="#C7C7C7" WidthRequest="150" VerticalOptions="Center" FontSize="16" TextColor="Blue" HorizontalOptions="End" />
                <Label Grid.Row="1" Grid.Column="0" HorizontalTextAlignment="End" VerticalOptions="Center" Text="Last Name" FontSize="16" TextColor="Black" HorizontalOptions="Start" />
                <Entry Grid.Row="1" Grid.Column="1" x:Name="txtLasttname" Placeholder="Enter Last Name" PlaceholderColor="#C7C7C7" WidthRequest="150" VerticalOptions="Center" FontSize="16" TextColor="Blue" HorizontalOptions="End" />
                <Label Grid.Row="2" Grid.Column="0" HorizontalTextAlignment="End" VerticalOptions="Center" Text="Address" FontSize="16" TextColor="Black" HorizontalOptions="Start" />
                <Entry Grid.Row="2" Grid.Column="1" x:Name="txtAddress" Placeholder="Enter Address" PlaceholderColor="#C7C7C7" WidthRequest="150" VerticalOptions="Center" FontSize="16" TextColor="Blue" HorizontalOptions="End" />
                <Label Grid.Row="3" Grid.Column="0" HorizontalTextAlignment="End" VerticalOptions="Center" Text="City" FontSize="16" TextColor="Black" HorizontalOptions="Start" />
                <Entry Grid.Row="3" Grid.Column="1" x:Name="txtCity" Placeholder="Enter City" PlaceholderColor="#C7C7C7" WidthRequest="150" VerticalOptions="Center" FontSize="16" TextColor="Blue" HorizontalOptions="End" />
                <Label Grid.Row="4" Grid.Column="0" HorizontalTextAlignment="End"  VerticalOptions="Center" Text="Select State" FontSize="16" TextColor="Black" HorizontalOptions="Start" />
                <Picker Grid.Row="4" Grid.Column="1" x:Name="txtState" WidthRequest="150" VerticalOptions="Center" FontSize="16" TextColor="Blue" HorizontalOptions="End" />
                <Label Grid.Row="5" Grid.Column="0" HorizontalTextAlignment="End" VerticalOptions="Center" Text="Zip Code" FontSize="16" TextColor="Black" HorizontalOptions="Start" />
                <Entry Grid.Row="5" Grid.Column="1" x:Name="txtZipCode" Placeholder="Enter Zip Code" PlaceholderColor="#C7C7C7" WidthRequest="150" VerticalOptions="Center" FontSize="16" TextColor="Blue" HorizontalOptions="End" />
            </Grid>
    </VerticalStackLayout>
</ContentPage>

É assim que ele é exibido:

Não consigo afetar a segunda coluna na grade, não importa o que eu faça, não consigo deixar a coluna mais próxima dos rótulos. Eu preferiria que o controle de entrada aparecesse precisamente à direita do rótulo, mas aparentemente não há como fazer isso. Vou me contentar em deixar a segunda coluna (coluna 1) mais próxima do texto do rótulo.

Tenho a seguinte página:

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="PhotoManager.MainPage">

    <ScrollView>
        <VerticalStackLayout
            Padding="5,0"
            Spacing="10">
            <Image
                Source="banner2.jpg"
                HeightRequest="75"
                Aspect="AspectFit"
                SemanticProperties.Description="Organize My League" />
            
                <Line Stroke="Black" X2="{Binding Width, Source={RelativeSource Self}}" HorizontalOptions="Fill" StrokeThickness="2" />

            <ActivityIndicator x:Name="activityIndicator"
                       IsVisible="false"
                       IsRunning="True"
                       Color="{StaticResource NavigationBarColor}" ZIndex="1000"
                       VerticalOptions="Center" HorizontalOptions="Center"
                       WidthRequest="100" HeightRequest="100"/>
            <Label
                Text="Log On"
                Style="{StaticResource Headline}"
                SemanticProperties.HeadingLevel="Level1" />

            <Label
                Text="Username"
                Style="{StaticResource SubHeadline}"
                SemanticProperties.HeadingLevel="Level2"
                SemanticProperties.Description="Enter your username." />

            <Entry x:Name="TheUsername"
                Placeholder="Enter Username"/>

            <Label
                Text="Password"
                Style="{StaticResource SubHeadline}"
                SemanticProperties.HeadingLevel="Level2"
                SemanticProperties.Description="Enter your password." />

            <Entry x:Name="ThePassword"
                Placeholder="Enter Password"
                IsPassword="true" />

            <Button
                x:Name="CounterBtn"
                Text="Submit" 
                SemanticProperties.Hint="Log on"
                Clicked="OnCounterClicked"
                HorizontalOptions="Fill" />

        </VerticalStackLayout>
    </ScrollView>
</ContentPage>

A linha:

<Line Stroke="Black" X2="{Binding Width, Source={RelativeSource Self}}" HorizontalOptions="Fill" StrokeThickness="2" />

Gera o aviso de assunto. Como resolvo o aviso?

Vejo muitos métodos para fazer um loop e recuperar os valores das caixas de seleção que estão marcadas, preciso iniciar um processo com o valor da caixa de seleção imediatamente quando uma caixa de seleção é marcada na lista de caixas de seleção. Não tenho certeza se é possível, mas seria bom se fosse. Caso contrário, eu teria que criar um procedimento extremamente complexo e ineficiente para marcar TODAS as caixas de seleção e seu relacionamento com os valores no sistema, gostaria de evitar isso. Meu código até agora:

Eu vinculo os dados à lista de caixas de seleção no código por trás:

Primeiro eu pego os dados do banco de dados:

MyDataSet = GetItems(MyConnection, MyDataSetAssoc.Tables(0).Rows(0)("itemvalue"), MyDataSetPrograms.Tables(0).Rows(0)("Program"))

Em seguida, vincule-o ao controle:

CheckBoxList_Items.DataSource = MyDataSet
CheckBoxList_Items.DataMember = "Items"
CheckBoxList_Items.DataTextField = "ItemName"
CheckBoxList_Items.DataValueField = "ItemID"

This is the jquery code in the document ready function:

$(document).ready(function() {
  $('#<%= CheckBoxList_Items.ClientID %>').click(function() {
    if ($(this).is(":checked")) {
      alert("ID #" + this.value + " was just checked.");
    } else {
      alert("ID #" + this.value + " was just unchecked.");
    }
  });
});

Isso é executado quando qualquer caixa de seleção na lista é clicada, agora preciso obter o valor da caixa de seleção que acabou de ser marcada. this.valueé indefinido e apenas a elseparte da ifdeclaração é executada, então isso não vai funcionar. Existe uma maneira de obter o valor da caixa de seleção que acabou de disparar esta função? Ou há outra abordagem que eu tenha que usar? Pode haver de 1 a N itens na lista, e há três listas de caixas de seleção que tenho que manipular quando uma caixa de seleção é "clicada". Esta lista de caixas de seleção em particular está no "nível" mais baixo das três.