/// <summary>
/// Set a property value on an object and notify that it changed only if it changed
/// </summary>
/// <typeparam name="T">The type the field and the value are</typeparam>
/// <param name="sender">The object that the field is being set on</param>
/// <param name="field">The field that will be changing</param>
/// <param name="value">The new value for the field</param>
/// <param name="before">The action that should be performed before the value is set</param>
/// <param name="after">The action that should be performed after the value is set</param>
/// <param name="properties">The property names of the properties that have changed</param>
public static void SetAndNotify <T>(this INotifyPropertyChanged sender, ref T field, T value, Action before, Action after, params string[] properties)
{
if (sender != null && sender.Set(ref field, value, before, after))
{
sender.OnPropertyChanged(properties);
}
}
public static void SetModel <T>(this INotifyPropertyChanged viewModel, T model)
{
using (viewModel.Suspend())
{
var token = viewModel.Get <SuspenderToken>("EntityNullToken");
if (token != null && model != null)
{
token.Dispose();
}
if (viewModel.Set(model, "Model"))
{
if (model == null)
{
viewModel.Set <SuspenderToken>(viewModel.Suspend(), "EntityNullToken");
}
}
}
}
public static void SetLinked <T>(this INotifyPropertyChanged viewModel, T view)
{
using (viewModel.Suspend())
{
var token = viewModel.Get <SuspenderToken>("EntityNullToken");
if (token != null && viewModel != null)
{
token.Dispose();
}
if (viewModel.Set(view, "Linked"))
{
//if (model == null) viewModel.Set<SuspenderToken>(viewModel.Suspend(), "EntityNullToken");
}
}
}
