public static void FixStateOfTrackedEntities(this DbContext context, string userName)
{
foreach (var entry in context.ChangeTracker.Entries <IEditableModel>())
{
IEditableModel stateInfo = entry.Entity;
stateInfo.UpdateIfEdited(userName);
entry.State = ConvertState(stateInfo);
}
}
private static EntityState ConvertState(IEditableModel entity)
{
if (entity.IsNew)
{
return(EntityState.Added);
}
else if (entity.IsDirty)
{
return(EntityState.Modified);
}
else if (entity.IsDeleted)
{
return(EntityState.Deleted);
}
return(EntityState.Unchanged);
}
public static bool RequiresSave(this IEditableModel entity)
{
if (entity.IsNew)
{
return(true);
}
else if (entity.IsDirty)
{
return(true);
}
else if (entity.IsDeleted)
{
return(true);
}
return(false);
}
/// <summary>
/// Applies the proper created and modified settings based upon the state of the model and returns true if it updated any fields.
/// </summary>
/// <typeparam name="TEntity"></typeparam>
public static bool UpdateIfEdited(this IEditableModel model, string userName)
{
if (model.IsNew)
{
model.CreatedBy = userName;
model.CreatedOn = System.DateTime.Now;
return(true);
}
else if (model.IsDirty)
{
model.ModifiedBy = userName;
model.ModifiedOn = System.DateTime.Now;
return(true);
}
return(false);
}
public static void CreateValueEditorViews(IEditableModel model, StackPanel editorViewContext, ModelValueChangedDelegate modelValueChanged = null)
{
Type modelType = model.GetType();
FieldInfo[] fields = modelType.GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
foreach (FieldInfo field in fields)
{
ValueEditorAttribute editorAttribute = field.GetCustomAttribute(typeof(ValueEditorAttribute)) as ValueEditorAttribute;
if (editorAttribute == null)
{
continue;
}
ValueEditorView valueEditorView = new ValueEditorView(model, field, modelValueChanged);
editorViewContext.Children.Add(valueEditorView);
}
}
public ItemEditorView(IEditableModel model) : this()
{
ValueEditorUtility.CreateValueEditorViews(model, ValueEditorViewContext);
}
