/// <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>
/// 获取一个课程的上课教师和需要上课的学生
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void GetStudentsAndTeacherButtonClick(object sender, RoutedEventArgs e)
{
if (WaitingForUpdating())
{
TaskDialog.ShowError("请先更新数据，然后进行相关操作");
return;
}
if (dgrdCourses.SelectedItems.Count != 1)
{
TaskDialog.ShowError("请选择且仅选择一门课程");
return;
}
JObject json = await NetHelper.Send(new { Command = Admin_StudentsAndTeacherOfCourses, ID = (dgrdCourses.SelectedItem as UICourse).Id });
if (!json[OK].Value <bool>())
{
TaskDialog.ShowError("获取失败：" + json[Message].Value <string>());
return;
}
JArray students = json[Data][ApiCommands.Students] as JArray;
JValue teacher = json[Data][Teacher] as JValue;
dgrdStudents.SelectedItems.Clear();
dgrdTeachers.SelectedItems.Clear();
foreach (JValue item in students)
{
dgrdStudents.SelectedItems.Add(Students.First(p => p.Id == item.Value <long>()));
}
dgrdTeachers.SelectedItem = Teachers.First(p => p.Id == teacher.Value <long>());
}
/// <summary>
/// 获取一位教师需要上的课程
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void GetCoursesOfTeacherButtonClick(object sender, RoutedEventArgs e)
{
if (WaitingForUpdating())
{
TaskDialog.ShowError("请先更新数据，然后进行相关操作");
return;
}
if (dgrdTeachers.SelectedItems.Count != 1)
{
TaskDialog.ShowError("请选择且仅选择一个教师");
return;
}
JObject json = await NetHelper.Send(new { Command = Admin_CourseOfTeacher, ID = (dgrdTeachers.SelectedItem as Person).Id });
if (!json[OK].Value <bool>())
{
TaskDialog.ShowError("获取失败：" + json[Message].Value <string>());
return;
}
JArray array = json[Data] as JArray;
dgrdCourses.SelectedItems.Clear();
foreach (JValue item in array)
{
dgrdCourses.SelectedItems.Add(Courses.First(p => p.Id == item.Value <int>()));
}
}
/// <summary>
/// 加载课程信息
/// </summary>
/// <returns></returns>
private async Task LoadCourses()
{
Courses.Clear();
JObject json = await NetHelper.Send(new { Command = Admin_Courses });
if (!json[OK].Value <bool>())
{
TaskDialog.ShowError("加载课程列表失败：" + json[Message].Value <string>());
return;
}
JArray array = json[Data] as JArray;
foreach (dynamic item in array)
{
UICourse course = new UICourse();
course.Id = item.Id;
course.Name = item.Name;
course.Teacher = item.Teacher;
course.TeacherId = item.TeacherId;
course.Year = item.Year;
course.Term = item.Term;
Courses.Add(course);
}
}
/// <summary>
/// 加载教师信息
/// </summary>
/// <returns></returns>
private async Task LoadTeachers()
{
Teachers.Clear();
JObject json = await NetHelper.Send(new { Command = ApiCommands.Admin_Teachers });
if (!json[OK].Value <bool>())
{
TaskDialog.ShowError("加载教师列表失败：" + json[Message].Value <string>());
return;
}
JArray array = json[Data] as JArray;
foreach (dynamic item in array)
{
Person person = new Person();
person.Id = item.Id;
person.Name = item.Name;
person.Born = item.Born;
person.Gender = item.Gender;
person.StartYear = item.StartYear;
person.Major = item.Major;
person.Role = item.Role;
Teachers.Add(person);
}
}
public bool PageClosing()
{
if (WaitingForUpdating())
{
if (TaskDialog.ShowWithYesNoButtons("还有已修改的数据没有更新，是否退出？", "正在关闭程序") == true)
{
return(true);
}
return(false);
}
return(true);
}
/// <summary>
/// 单击新建条目按钮
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void AddNewItemButtonClick(object sender, RoutedEventArgs e)
{
Button btn = sender as Button;
if (btn.Tag.Equals("2"))
{
AddNewCourseDialog dialog = new AddNewCourseDialog(Courses.Max(p => p.Id) + 1, "新增课程");
if (dialog.ShowDialog() == true)
{
Course course = dialog.Course;
if (Courses.Any(p => p.Id == course.Id))
{
TaskDialog.ShowError("该ID已存在");
return;
}
ModifiedCourses.Add(new UICourse(course));
Courses.Add(new UICourse(course));
}
}
else
{
bool teacher = btn.Tag.Equals("1");
AddNewPersonDialog dialog = new AddNewPersonDialog(teacher? Students.Max(p => p.Id) + 1:Teachers.Max(p => p.Id) + 1, teacher);
if (dialog.ShowDialog() == true)
{
Person person = dialog.Person;
if (Students.Any(p => p.Id == person.Id) || Teachers.Any(p => p.Id == person.Id))
{
TaskDialog.ShowError("该ID已存在");
return;
}
if (btn.Tag.Equals("0"))
{
Students.Add(person);
}
else
{
Teachers.Add(person);
}
ModifiedPersons.Add(person);
}
}
}
/// <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>());
}
}