/// <summary>
/// Tries to set the specified member to the specified <paramref name="value"/>.
/// </summary>
/// <param name="binder">The binder.</param>
/// <param name="value">The value to be set.</param>
/// <returns><see langword="true"/> if the member is set; otherwise, <see langword="false"/>.</returns>
public override bool TrySetMember(SetMemberBinder binder, object value)
{
Contract.Assume(binder != null);
var comparison = binder.IgnoreCase ? StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal;
Contract.Assume(binder.Name != null);
var property = ComponentReflection.GetProperty(source, binder.Name, comparison);
if (property == null)
{
return(false);
}
if (property.IsReadOnly)
{
throw new InvalidOperationException(string.Format(CultureInfo.CurrentCulture, Errors.PropertyIsReadOnly, property.Name));
}
Action <object, object> action = property.SetValue;
var invokeAsync = action.ToAsync();
invokeAsync(source, value);
return(true);
}
private bool TryGetPropertyObservable(string propertyName, StringComparison comparison, out object result)
{
Contract.Requires(propertyName != null);
Contract.Ensures(!Contract.Result <bool>() || Contract.ValueAtReturn(out result) != null);
var property = ComponentReflection.GetProperty(source, propertyName, comparison);
if (property == null)
{
result = null;
return(false);
}
var changed = property.PropertyChanged(source).Select(_ => property.GetValue(source));
#if !SILVERLIGHT
Contract.Assume(property.PropertyType != null);
#endif
result = changed.Coerce(property.PropertyType);
return(true);
}
/// <summary>
/// Gets the names of the dynamic members.
/// </summary>
/// <returns>Sequence of dynamic member names.</returns>
public override IEnumerable <string> GetDynamicMemberNames()
{
Contract.Ensures(Contract.Result <IEnumerable <string> >() != null);
return(ComponentReflection.GetMembers(source).Select(member => member.Name));
}
private bool TryGetEventObservable(string eventName, StringComparison comparison, out object result)
{
Contract.Requires(eventName != null);
Contract.Ensures(!Contract.Result <bool>() || Contract.ValueAtReturn(out result) != null);
var @event = ComponentReflection.GetEvent(source, eventName, comparison);
if (@event == null)
{
result = null;
return(false);
}
#if !SILVERLIGHT
Contract.Assume(@event.EventType != null);
#endif
#if WINDOWS_PHONE || PORT_45
var isGeneric = @event.EventType.GetTypeInfo().IsGenericType;
#else
var isGeneric = @event.EventType.IsGenericType;
#endif
Type eventArgsType;
if (@event.EventType == typeof(EventHandler))
{
eventArgsType = typeof(EventArgs);
}
else if (!isGeneric || @event.EventType.GetGenericTypeDefinition() != typeof(EventHandler <>))
{
throw new ArgumentException(
string.Format(CultureInfo.CurrentCulture, Errors.EventIsNotCompatibleWithEventHandler, eventName),
"eventName");
}
else
{
#if WINDOWS_PHONE || PORT_45
eventArgsType = @event.EventType.GetTypeInfo().GenericTypeArguments[0];
#else
eventArgsType = @event.EventType.GetGenericArguments()[0];
#endif
Contract.Assume(eventArgsType != null);
#if WINDOWS_PHONE || PORT_45
var assignable = typeof(EventArgs).GetTypeInfo().IsAssignableFrom(eventArgsType.GetTypeInfo());
#else
var assignable = typeof(EventArgs).IsAssignableFrom(eventArgsType);
#endif
if (!assignable)
{
throw new ArgumentException(
string.Format(CultureInfo.CurrentCulture, Errors.EventIsNotCompatibleWithEventArgs, eventName),
"eventName");
}
}
result = @event.EventRaised(source).Coerce(eventArgsType);
return(true);
}