.NET MAUI传递StackLayout至函数的绑定问题求助

我正在解决.NET MAUI中的绑定问题：学生卡片包含一个Label和三个Entry，需求是点击编辑按钮时，三个Entry变为可编辑状态，同时编辑按钮替换为提交按钮。

卡片是1行2列的Grid结构，内部包含StackLayout和右侧的ImageButton。当前我的XAML页面片段如下：

<Grid  ColumnDefinitions="3*,1*" BackgroundColor="{StaticResource cardbg}" RowSpacing="3">
       <StackLayout Grid.Row="0" Grid.Column="0" x:Name="StudentStack" Margin="20">                                                                                          
        <Label x:Name ="idlab" Text="{Binding StudentId, StringFormat='Id={0:D0}'}" TextColor="{StaticResource cardtextbg}"/>
        <Entry Text="{Binding StudentName}" TextColor="{StaticResource cardtextbg}" IsReadOnly="True"/>
        <Entry Text="{Binding StudentSurname}" TextColor="{StaticResource cardtextbg}" IsReadOnly="True"/>
        <Entry Text="{Binding StudentGPA}" TextColor="{StaticResource cardtextbg}"
                                               IsReadOnly="True"
                                               Margin="10"/>
       </StackLayout>

       <ImageButton x:Name="edit"   Grid.Row="0" Grid.Column="1"                                                
Command="{Binding Source={RelativeSource AncestorType={x:Type viewmodels:StudentsViewModel}}, Path=EditStudents}"
CommandParameter="{Binding Source={RelativeSource AncestorType={x:Type models:Student}}}"                                                 
HeightRequest="{Binding Height, Source={x:Reference idlab}}"                                               
Source="edit.svg"  
BackgroundColor="CornflowerBlue">                                                                                            
       </ImageButton>
</Grid>

我尝试的绑定代码如下：
XAML部分：

Command="{Binding Source={RelativeSource AncestorType={x:Type viewmodels:StudentsViewModel}}, Path=EditStudents}"
CommandParameter="{Binding Source={RelativeSource AncestorType={x:Type models:Student}}}" 

ViewModel部分：

public ICommand EditStudents { get; set; }

public StudentsViewModel()
{
  EditStudents = new Command(onEditStudents);
}
private void onEditStudents(object obj)
{
   var b = 3 + 4;
}

当前传递的是Student模型对象，而非StackLayout，无法控制对应卡片Entry的只读状态。请问如何绑定ViewModel并实现三个Entry的只读状态切换，同时完成按钮替换？对应的函数应该如何编写？

解决方案（遵循MVVM设计思想） #

直接传递StackLayout操作UI不符合MVVM解耦原则，更合理的方式是通过绑定模型属性来控制UI状态：

1. 给Student模型添加编辑状态属性
   实现INotifyPropertyChanged接口，添加IsEditing属性用于控制编辑状态：

public class Student : INotifyPropertyChanged
{
    // 原有属性：StudentId、StudentName、StudentSurname、StudentGPA
    private bool _isEditing;
    public bool IsEditing
    {
        get => _isEditing;
        set
        {
            _isEditing = value;
            OnPropertyChanged();
        }
    }

    // 实现属性变更通知
    public event PropertyChangedEventHandler PropertyChanged;
    protected void OnPropertyChanged([CallerMemberName] string propertyName = null)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

2. 创建布尔反转转换器
   用于将IsEditing属性反转后绑定到IsReadOnly和IsVisible：

public class InverseBooleanConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return !(bool)value;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return !(bool)value;
    }
}

在页面资源中注册转换器：

<ContentPage.Resources>
    <converters:InverseBooleanConverter x:Key="InverseBooleanConverter"/>
</ContentPage.Resources>

3. 修改XAML绑定逻辑
   将Entry的IsReadOnly绑定到IsEditing的反转值，同时添加提交按钮并通过IsVisible控制按钮切换：

<Grid ColumnDefinitions="3*,1*" BackgroundColor="{StaticResource cardbg}" RowSpacing="3">
    <StackLayout Grid.Row="0" Grid.Column="0" x:Name="StudentStack" Margin="20">
        <Label x:Name="idlab" Text="{Binding StudentId, StringFormat='Id={0:D0}'}" TextColor="{StaticResource cardtextbg}"/>
        <Entry Text="{Binding StudentName}" TextColor="{StaticResource cardtextbg}" IsReadOnly="{Binding IsEditing, Converter={StaticResource InverseBooleanConverter}}"/>
        <Entry Text="{Binding StudentSurname}" TextColor="{StaticResource cardtextbg}" IsReadOnly="{Binding IsEditing, Converter={StaticResource InverseBooleanConverter}}"/>
        <Entry Text="{Binding StudentGPA}" TextColor="{StaticResource cardtextbg}"
               IsReadOnly="{Binding IsEditing, Converter={StaticResource InverseBooleanConverter}}"
               Margin="10"/>
    </StackLayout>

    <!-- 编辑按钮：非编辑状态显示 -->
    <ImageButton Grid.Row="0" Grid.Column="1"                
            Command="{Binding Source={RelativeSource AncestorType={x:Type viewmodels:StudentsViewModel}}, Path=ToggleEditCommand}"
            CommandParameter="{Binding}"                                                 
            HeightRequest="{Binding Height, Source={x:Reference idlab}}"                                               
            Source="edit.svg"  
            BackgroundColor="CornflowerBlue"
            IsVisible="{Binding IsEditing, Converter={StaticResource InverseBooleanConverter}}"/>

    <!-- 提交按钮：编辑状态显示 -->
    <ImageButton Grid.Row="0" Grid.Column="1"                
            Command="{Binding Source={RelativeSource AncestorType={x:Type viewmodels:StudentsViewModel}}, Path=SubmitEditCommand}"
            CommandParameter="{Binding}"                                                 
            HeightRequest="{Binding Height, Source={x:Reference idlab}}"                                               
            Source="submit.svg"  
            BackgroundColor="Green"
            IsVisible="{Binding IsEditing}"/>
</Grid>

4. ViewModel中实现切换与提交命令

public class StudentsViewModel
{
    public ICommand ToggleEditCommand { get; set; }
    public ICommand SubmitEditCommand { get; set; }

    public StudentsViewModel()
    {
        ToggleEditCommand = new Command<Student>(OnToggleEdit);
        SubmitEditCommand = new Command<Student>(OnSubmitEdit);
    }

    private void OnToggleEdit(Student student)
    {
        // 切换编辑状态
        student.IsEditing = !student.IsEditing;
    }

    private void OnSubmitEdit(Student student)
    {
        // 这里添加提交逻辑，比如保存到数据库
        // 提交完成后退出编辑状态
        student.IsEditing = false;
    }
}

内容的提问来源于stack exchange，提问作者Artemast