Class Preference.EventContext

Definition

Namespace:: Tizen.Applications

Assembly:: Tizen.Applications.Preference.dll

API Level:: 3

The class manages event handlers of the preference keys. The class enables having event handlers for individual preference keys.


                C#
                
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public class EventContext

Inheritance: System.Object

Preference.EventContext

Events

View Source

Changed

Occurs whenever there is a change in the value of a preference key.

Declaration


                C#
                
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public event EventHandler<PreferenceChangedEventArgs> Changed

Event Type

Type	Description
System.EventHandler<PreferenceChangedEventArgs>

Examples


                
                
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    private static void Preference_PreferenceChanged(object sender, PreferenceChangedEventArgs e)
    {
        Console.WriteLine("key {0}", e.Key);
    }
    Preference.EventContext context = null;
    Preference.GetEventContext("active_user").TryGetTarget(out context);
    if(context != null)
    {
        context.Changed += Preference_PreferenceChanged;
    }

    Preference.Set("active_user", "Poe");

    Preference.GetEventContext("active_user").TryGetTarget(out context);
    if (context != null)
    {
        context.Changed -= Preference_PreferenceChanged;
    }

Exceptions

Type	Condition
System.ArgumentException	Thrown when the key does not exist or when there is an invalid parameter.
System.InvalidOperationException	Thrown when the bundle instance has been disposed.