// For DeleteCommand
public override void Delete()
{
if (CurrentCourseViewModel == null)
{
ModernDialog.ShowMessage("请选择一个课程。", "操作警告", MessageBoxButton.OK);
return;
}
if (ModernDialog.ShowMessage("确定删除当前课程？", "删除警告", MessageBoxButton.YesNo) == MessageBoxResult.Yes)
{
if (_courseDataAccessor.Delete(Mapper.Map <Course>(CurrentCourseViewModel)))
{
var currentIndex = CourseViewModels.IndexOf(CurrentCourseViewModel);
CourseViewModels.Remove(CurrentCourseViewModel);
if (currentIndex > 0)
{
CurrentCourseViewModel = CourseViewModels[currentIndex - 1];
}
else if (CourseViewModels.Count > 0)
{
CurrentCourseViewModel = CourseViewModels[0];
}
Message = "删除课程成功";
}
}
}
private void Rollback()
{
if (Action == ViewModelAction.Add)
{
CourseViewModels.Remove(CourseViewModel);
}
else if (Action == ViewModelAction.Edit)
{
var course = _courseDataAccessor.GetByKey(CourseViewModel.ModelId);
Mapper.Map(course, CourseViewModel);
}
}