我创建了一个带有自定义属性的自定义组件。问题是当我试图使用它将某些内容绑定到组件时，它将无法编译并引发错误。
错误：
[XFC0009] No property, BindableProperty, or event found for "Label", or mismatching type between value and property.组件XAML：
<?xml version="1.0" encoding="utf-8"?>
<ContentView xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:viewmodel="clr-namespace:TestProject.Components"
x:DataType="viewmodel:Tile"
x:Class="TestProject.Components.Tile">
<Frame CornerRadius="10"
WidthRequest="300"
HeightRequest="150">
<Frame.GestureRecognizers>
<TapGestureRecognizer Tapped="TileClicked"/>
</Frame.GestureRecognizers>
<StackLayout x:Name="SL_Content"
HorizontalOptions="Start"
VerticalOptions="Start">
<Label Text="{Binding Label}"
FontSize="{Binding Size}"
FontAttributes="Bold"/>
<Image Source="{Binding Icon}"
HorizontalOptions="Start"
WidthRequest="50"
HeightRequest="0"
Margin="0,10,0,0"
x:Name="I_Img"/>
</StackLayout>
</Frame>
</ContentView>不可绑定的标签属性代码：
private static readonly BindableProperty LabelProperty = BindableProperty.Create(
propertyName: nameof(Label),
returnType: typeof(string),
defaultValue: string.Empty,
declaringType: typeof(Tile),
defaultBindingMode: BindingMode.OneWay);
public string Label
{
get => (string)GetValue(LabelProperty);
set => SetValue(LabelProperty, value);
}施工单位：
public Tile()
{
BindingContext = this;
InitializeComponent();
}控件的用法：
<?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"
xmlns:components="clr-namespace:TestProject.Components"
xmlns:model="clr-namespace:TestProject.Model"
xmlns:viewmodel="clr-namespace:TestProject.ViewModel"
x:DataType="viewmodel:ScannedItemViewModel"
x:Class="TestProject.Pages.Popups.CodeDetected">
<CollectionView ItemsSource="{Binding _scannedItems}">
<CollectionView.ItemTemplate>
<DataTemplate x:DataType="model:ScannedItem">
<SwipeView>
<SwipeView.RightItems>
<SwipeItem Text="Delete"
Invoked="SwipeItem_OnDelete"/>
</SwipeView.RightItems>
<HorizontalStackLayout HeightRequest="40">
<Label VerticalOptions="Center" HorizontalOptions="Start" WidthRequest="120"
Padding="15,0,0,0" FontSize="16" Text="{Binding _num}" />
<Label VerticalOptions="Center" HorizontalOptions="Start" FontSize="16"
Text="{Binding _serial}" />无法像这样将某些内容绑定到标签，否则将引发错误
一个
2条答案
按热度按时间bis0qfac1#
Usually, it makes a lot of sense to just tell your View that it needs to look for the bindings in itself:
And then change the binding like so:
Also, BindingContext this in a custom control is always a mistake it messes with your controls VM assignment when you use it in views so change your constructor to
Good luck!
x6h2sr282#
只需要将private改为public即可，例如：
我曾经遇到过这个问题，而且在公文中，也是公开的。