protected void RaiseOnChange(object item)
{
INotifyPropertyChanged itemObject = item as INotifyPropertyChanged;
if (itemObject != null)
{
itemObject.RaisePropertyChanged(_args.Column.Field);
}
}
public static void RaisePropertyChanged(this INotifyPropertyChanged sender, PropertyChangedEventHandler handler, params string[] propertyNames)
{
if (handler != null && propertyNames != null && propertyNames.Length > 0)
{
foreach (var propertyName in propertyNames)
{
sender.RaisePropertyChanged(handler, propertyName);
}
}
}
public static bool ViewModelSetValue <T>(this INotifyPropertyChanged viewModel, string propName, ref T currValue, T value, PropertyChangedEventHandler eventHandler)
{
if (Equals(currValue, value))
{
return(false);
}
currValue = value;
viewModel.RaisePropertyChanged(propName, eventHandler);
return(true);
}
public override void ApplyValue(Dictionary <string, object> item, object state)
{
OptionSetValue opt = (OptionSetValue)state;
item[_args.Column.Field] = opt;
item[_args.Column.Field + "name"] = opt.Name;
INotifyPropertyChanged itemObject = ((object)item) as INotifyPropertyChanged;
if (itemObject != null)
{
itemObject.RaisePropertyChanged(_args.Column.Field);
}
}
private static void NotifyComputedPropertyIfChanged(this INotifyPropertyChanged source, string propertyName = default)
{
ConditionallyRegisterDependentInstance(source);
var value = Dynamic.GetPropertyOrFieldValue <INotifyPropertyChanged, object>(source, propertyName);
var fields = Store.GetBackingFields(source);
if (fields.TryGetValue(propertyName, out var current))
{
if (Equals(value, current))
{
return;
}
fields[propertyName] = value;
source.RaisePropertyChanged(current, value, propertyName);
return;
}
else
{
fields[propertyName] = value;
source.RaisePropertyChanged(propertyName);
}
}
internal static void SetFieldValue <T>(this INotifyPropertyChanged viewModel, T value, string propertyName)
{
var viewModelType = viewModel.GetType();
var field = viewModelType.Field(propertyName);
var original = (T)field.GetValue(viewModel);
if (EqualityComparer <T> .Default.Equals(value, original))
{
return;
}
field.SetValue(viewModel, value);
viewModel.RaisePropertyChanged(propertyName);
}
public static void SetProperty <TValue>(this INotifyPropertyChanged source, TValue value, [CallerMemberName] string propertyName = default)
{
ConditionallyRegisterDependentInstance(source);
var fields = Store <TValue> .GetBackingFields(source);
var current = fields.GetOrAdd(propertyName, default(TValue));
if (EqualityComparer <TValue> .Default.Equals(value, current))
{
return;
}
if (source is INotifyPropertyChanging notifyChangingSource)
{
notifyChangingSource.RaisePropertyChanging(propertyName);
}
fields[propertyName] = value;
source.RaisePropertyChanged(current, value, propertyName);
}
