private void CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Remove)
{
foreach (object item in e.OldItems)
{
if (item is Person)
{
DeletedPersons.Add(item as Person);
if ((item as Person).Role == "教师")
{
Courses.CollectionChanged -= CollectionChanged;
foreach (var course in Courses.Where(p => p.TeacherId == (item as Person).Id).ToArray())
{
Courses.Remove(course);
}
Courses.CollectionChanged += CollectionChanged;
}
}
else if (item is UICourse)
{
DeletedCourses.Add(item as UICourse);
}
}
}
}
/// <summary>
/// 更新课程信息
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void UpdateCourseButtonClick(object sender, RoutedEventArgs e)
{
if (ModifiedCourses.Count + DeletedCourses.Count == 0)
{
TaskDialog.ShowError("没有修改或删除的课程");
return;
}
JObject json = await NetHelper.Send(new { Command = Admin_Update_Courses, Modified = ModifiedCourses.Select(p => p.ToCourse()), Deleted = DeletedCourses.Select(p => p.ToCourse()) }) as JObject;
if (json[OK].Value <bool>())
{
TaskDialog.Show(json[Message].Value <string>());
ModifiedCourses.Clear();
DeletedCourses.Clear();
}
else
{
TaskDialog.ShowError(json[Message].Value <string>());
}
}
