框架可见的绑定无效

发布于 2025-02-09 14:22:40 字数 1183 浏览 1 评论 0原文

在最新的.NET MAUI Preview 17.3.0 Preview 2.0中，我对我对绑定的绑定有问题。可能与该版本无关。我没有使用mvvm ..在这里是我的代码：

 <Frame Background="LightBlue" IsVisible="{Binding FrameVisible}" x:Name="Frame_Test" Margin="0,10,0,0" CornerRadius="25" HeightRequest="100">

在XAML的后端，我有一个布尔值我试图绑定到

private bool frameVisible;
        public bool FrameVisible
        {
            get
            {
                return frameVisible;
            }
            set
            {
                frameVisible = value;
                OnPropertyChanged("FrameVisible");
            }
        }

InotifiyPropertychang

public event PropertyChangedEventHandler PropertyChanged;

        private void OnPropertyChanged(string propertyName)
        {
            Console.WriteLine($"[App] Property changed {propertyName}");
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }

我正在实现我的类构造函数中的，我正在设置BindingContext = this; 我想念什么？更改framevisible = false或true之后，OnProperTychanged触发器，但我看不到框架上的GUI更改。悬停在XAML上后的结果显示未找到用于绑定的数据。

原文

I am having an issue with my Binding on isVisible in latest .Net Maui Preview 17.3.0 Preview 2.0. Probably unrelated to the version. I am not using MVVM..here is my code:

 <Frame Background="LightBlue" IsVisible="{Binding FrameVisible}" x:Name="Frame_Test" Margin="0,10,0,0" CornerRadius="25" HeightRequest="100">

In the backend of the XAML, I have the boolean I am trying to bind to

private bool frameVisible;
        public bool FrameVisible
        {
            get
            {
                return frameVisible;
            }
            set
            {
                frameVisible = value;
                OnPropertyChanged("FrameVisible");
            }
        }

I am implementing INotifiyPropertyChanged

public event PropertyChangedEventHandler PropertyChanged;

        private void OnPropertyChanged(string propertyName)
        {
            Console.WriteLine(quot;[App] Property changed {propertyName}");
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }

In my class constructor I am setting bindingcontext = this;
What am I missing? The OnPropertyChanged triggers after changing frameVisible = false or true but I don't see any changes on GUI for the frame. The result after hovering over Xaml shows No datacontext found for binding.

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童话里做英雄 2025-02-16 14:22:40

使用边框而不是框架。例子：

<Border Stroke="Black" StrokeThickness="2" IsVisible="{Binding FrameVisible}" x:Name="Frame_Test">
    <Border.StrokeShape>
        <RoundRectangle CornerRadius="0,0,0,0" />
    </Border.StrokeShape>
    <!-- Object you wish to wrap border around -->
</Border>

Use Border instead of Frame. Example:

<Border Stroke="Black" StrokeThickness="2" IsVisible="{Binding FrameVisible}" x:Name="Frame_Test">
    <Border.StrokeShape>
        <RoundRectangle CornerRadius="0,0,0,0" />
    </Border.StrokeShape>
    <!-- Object you wish to wrap border around -->
</Border>

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