/// <summary>
/// 设置一门课程需要上课的学生和上课教师
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void SetStudentsAndTeacherOfCourseButtonClick(object sender, RoutedEventArgs e)
{
if (WaitingForUpdating())
{
TaskDialog.ShowError("请先更新数据，然后进行相关操作");
return;
}
if (dgrdStudents.SelectedItems.Count == 0)
{
TaskDialog.ShowError("请至少选择一位学生");
return;
}
if (dgrdTeachers.SelectedItems.Count != 1)
{
TaskDialog.ShowError("请选择一位教师");
return;
}
if (dgrdCourses.SelectedItems.Count != 1)
{
TaskDialog.ShowError("请选择一门课程");
return;
}
int id = (dgrdCourses.SelectedItem as UICourse).Id;
IEnumerable <long> studentsId = dgrdStudents.SelectedItems.Cast <Person>().Select(p => p.Id);
long teacherId = (dgrdTeachers.SelectedItem as Person).Id;
JObject json = await NetHelper.Send(new { Command = Admin_SetStudentsAndTeacherOfCourse, ID = id, Students = studentsId, Teacher = teacherId }) as JObject;
TaskDialog.Show(json[Message].Value <string>(),
icon: json[OK].Value <bool>() ? TaskDialogStandardIcon.None : TaskDialogStandardIcon.Error);
await LoadCourses();
}
/// <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>());
}
}
