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POHow send a static object in to event for `PropertyChanged`
 

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  1. POHow send a static object in to event for `PropertyChanged`
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    <p>I have a project by MVVM pattern. also I have a User Control in it. This user Control has a static DependencyProperty</p> <pre><code>public partial class RadarView : INotifyPropertyChanged { public static DispatcherTimer Timer { get; set; } public static readonly DependencyProperty RequestTypeProperty = DependencyProperty.Register("RequestType", typeof(RadarRequestType), typeof(RadarView), new FrameworkPropertyMetadata(new RadarRequestType(), RequestTypeChanged)); public RadarRequestType RequestType { get { return (RadarRequestType)GetValue(RequestTypeProperty); } set { SetValue(RequestTypeProperty, value); } } public static void RequestTypeChanged(DependencyObject dobject, DependencyPropertyChangedEventArgs args) { var radar = (RadarView)dobject; if (Timer == null) Timer = new DispatcherTimer { Interval = new TimeSpan(0, 0, 1) }; Timer.Tick += DispatcherTimerTick; Timer.Start(); } private static void DispatcherTimerTick(object sender, EventArgs e) { StartText = DateTime.Now.Second.ToString(); PropertyChanged(this, new PropertyChangedEventArgs("StartText")); } public static event PropertyChangedEventHandler PropertyChanged = delegate { }; } </code></pre> <p>My problem is in DispatcherTimerTick , because this in it event is same my user Control and it is not static. Message of this build error is : Keyword 'this' is not valid in a static property, static method, or static field initializer</p> <p>In fact I need to send (RadarView)dobject to DispatcherTimerTick event. How can do I?</p>
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    1. COWhy do you need the timer to be static ?
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      1. USNicolas Repiquet
    2. CO@NicolasRepiquet: Because RequestTypeChanged is static and It must be static
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    3. COOf course `RequestTypeChanged` as to be static. But you got a reference to `RadarView` in it, so nothing prevent you to do something like `radar.Timer`. Sharing the same timer across all of your `RadarView` instances doesn't sounds good.
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