public ActionResult Delete(TeacherUserModel tum)
{
if (tub.RemoveTeacher(tum))
{
return(RedirectToAction("Index"));
}
else
{
ModelState.AddModelError("Error", "删除教师用户信息失败!");
return(View(tum));
}
}
public ActionResult Edit(TeacherUserModel tum)
{
if (tub.ModeifyTeacher(tum))
{
return(RedirectToAction("Index"));
}
else
{
ViewBag.TeacherID = new SelectList(tb.GetTeachers(), "ID", "TeacherName", tum.TeacherID);
ModelState.AddModelError("Error", "修改教师用户信息失败!");
return(View(tum));
}
}
public ActionResult Create(TeacherUserModel tum)
{
if (tub.AddTeacher(tum))
{
return(RedirectToAction("Index"));
}
else
{
ModelState.AddModelError("Error", "添加用户失败！");
ViewBag.TeacherID = new SelectList(tb.GetTeachers(), "ID", "TeacherName", tum.TeacherID);
return(View());
}
}
/// <summary>
/// 获取全部教师
/// </summary>
/// <returns></returns>
public List <TeacherUserModel> GetTeacherModels()
{
var tums = new List <TeacherUserModel>();
foreach (var tu in PRDB.TeacherUsers.OrderBy(tu => tu.TeacherID))
{
var tum = new TeacherUserModel();
tum.TeacherID = tu.TeacherID;
tum.TeacherName = tu.Teacher.TeacherName;
tum.Password = tu.Password;
tum.UserName = tu.UserName;
tums.Add(tum);
}
return(tums);
}
/// <summary>
/// 添加教师用户
/// </summary>
/// <param name="tum"></param>
/// <returns></returns>
public bool AddTeacher(TeacherUserModel tum)
{
try
{
var tu = new TeacherUser();
tu.UserName = tum.UserName;
tu.Password = tum.Password;
tu.TeacherID = tum.TeacherID;
PRDB.TeacherUsers.Add(tu);
PRDB.SaveChanges();
return(true);
}
catch
{
return(false);
}
}
/// <summary>
/// 删除教师用户
/// </summary>
/// <param name="tum">教师用户</param>
/// <returns></returns>
public bool RemoveTeacher(TeacherUserModel tum)
{
try
{
var tu = PRDB.TeacherUsers.SingleOrDefault(tus => tus.UserName == tum.UserName);
if (tu != null)
{
PRDB.TeacherUsers.Remove(tu);
PRDB.SaveChanges();
return(true);
}
else
{
return(false);
}
}
catch
{
return(false);
}
}
/// <summary>
/// 修改教师用户
/// </summary>
/// <param name="tum">教师用户</param>
/// <returns></returns>
public bool ModeifyTeacher(TeacherUserModel tum)
{
try
{
var tu = PRDB.TeacherUsers.SingleOrDefault(tus => tus.UserName == tum.UserName);
if (tu != null)
{
tu.Password = tum.Password;
tu.TeacherID = tum.TeacherID;
PRDB.SaveChanges();
return(true);
}
else
{
return(false);
}
}
catch
{
return(false);
}
}
/// <summary>
/// 按用户名获取教师用户名
/// </summary>
/// <param name="username">用户名</param>
/// <returns></returns>
public TeacherUserModel GetTeacherUserModel(string username)
{
try
{
var tu = PRDB.TeacherUsers.SingleOrDefault(tuser => tuser.UserName == username);
if (tu != null)
{
var tum = new TeacherUserModel();
tum.UserName = tu.UserName;
tum.Password = tu.Password;
tum.TeacherID = tu.TeacherID;
return(tum);
}
else
{
return(null);
}
}
catch
{
return(null);
}
}
