ObservableAsPropertyHelper class¶

Attributes: [DebuggerDisplay("Value = {_lastValue}, IsSubscribed = {IsSubscribed}")]

Summary¶

View source

ObservableAsPropertyHelper is a class to help ViewModels implement "output properties", that is, a property that is backed by an Observable. The property will be read-only, but will still fire change notifications. This class can be created directly, but is more often created via the OAPHCreationHelperMixins extension methods.

classDiagram
class ObservableAsPropertyHelper~T~
class IHandleObservableErrors {
    <>
}
IHandleObservableErrors <|.. ObservableAsPropertyHelper~T~
class IDisposable {
    <>
}
IDisposable <|.. ObservableAsPropertyHelper~T~
class IEnableLogger {
    <>
}
IEnableLogger <|.. ObservableAsPropertyHelper~T~

Implements: IHandleObservableErrors, IDisposable, IEnableLogger

Remarks¶

Use this helper when the value for a property is derived from one or more observable streams (for example, WhenAnyValue). The helper subscribes to the source observable, tracks the latest value, and raises change notifications through the supplied callbacks.

Examples¶

<![CDATA[
 _fullName = this.WhenAnyValue(x => x.FirstName, x => x.LastName,
 (first, last) => $"{first} {last}")
 .ToProperty(this, x => x.FullName);
 
 public string FullName => _fullName.Value;
 ]]>

Constructors¶

Properties¶

Methods¶