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[英]Xamarin No property, bindable property, or event found for 'ToolbarItems'
[英]Creating bindable property with Xamarin C# gave No property, bindable property found
我创建了一个从StackLayout
派生的类:
public class MyStackLayout : StackLayout
{
private readonly BindableProperty TriggerTypeProperty = BindableProperty.Create("TriggerType", typeof(string), typeof(MyStackLayout), defaultValue: "test", propertyChanged: (b, o, n) => OnTriggerTypePropChanged(b, (string)o, (string)n));
public string TriggerType
{
get
{
return (string)GetValue(TriggerTypeProperty);
}
set
{
SetValue(TriggerTypeProperty, value);
}
}
private static void OnTriggerTypePropChanged(BindableObject bindable, string oldvalue, string newvalue)
{
var obj = bindable as MyStackLayout;
if (obj == null)
{
return;
}
obj.TriggerType = newvalue;
}
}
在XAML中:
<controls1:MyStackLayout IsVisible="False" TriggerType="{Binding AStringPropertyFromViewModel}">
...
</controls1:MyStackLayout>
我收到错误消息:
找不到“ TriggerType”的属性,可绑定属性或事件,或值和属性之间的类型不匹配。
怎么了 ?
如果我在XAML中使用TriggerType="A string"
可以正常工作,如果我使用{Binding ...}
将不起作用。
根据Xamarin文档,这是如何定义可绑定属性:
public static readonly BindableProperty EventNameProperty =
BindableProperty.Create ("EventName", typeof(string),typeof(EventToCommandBehavior), null);
尝试将可绑定属性从私有更改为公共,以查看它是否解决了您的问题。
文档的链接: https : //docs.microsoft.com/zh-cn/xamarin/xamarin-forms/xaml/bindable-properties
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