public List <Stu> GetStusById(string id)
{
List <Stu> list = new List <Stu>();
string sql = "SELECT * FROM Stu where StuID=@id";
// DataSet ds = SqlHelper.ExecuteDataset(SqlHelper.ConnString, CommandType.Text, sql);
Stu stu = null;
using (SqlDataReader row = SqlHelper.ExecuteReader(SqlHelper.ConnString, CommandType.Text, sql, new SqlParameter("@id", id)))
{
if (row.Read())
{
stu = new Stu();
stu.StuID = (int)row["StuID"];
stu.StuPwd = (string)row["StuPwd"];
stu.StuName = (string)row["StuName"];
stu.StuClass = (int)row["StuClass"];
stu.StuGrade = (int)row["StuGrade"];
stu.StuTel = (string)row["StuTel"];
list.Add(stu);
}
}
return(list);
}
public List <Stu> GetStudentList()
{
List <Student> students = en.Students.ToList();
List <Stu> slist = new List <Stu>();
for (int i = 0; i < students.Count; i++)
{
Stu student = new Stu();
student.ID = students[i].ID;
student.NRIC = students[i].NRIC;
student.StudentName = students[i].Name;
student.Gender = students[i].Gender == "Female" ? "F" : "M";
student.Age = DateTime.Now.Year - students[i].Birthday.Year;
student.Number = 0;
if (Convert.ToBoolean(students[i].English) == true)
{
student.Number += 1;
}
if (Convert.ToBoolean(students[i].Math) == true)
{
student.Number += 1;
}
if (Convert.ToBoolean(students[i].Science == true))
{
student.Number += 1;
}
slist.Add(student);
}
return(slist);
}
public int UpdateStudent(Stu s, int type)
{
int result = 0;
Student student = new Student();
if (type == 1)
{
student = en.Students.Where(x => x.ID == s.ID).FirstOrDefault();
}
student.NRIC = s.NRIC;
student.Name = s.StudentName;
student.Birthday = s.Birthday;
student.AvailableDate = s.AvailableDate;
student.Gender = s.Gender;
student.English = s.English;
student.Math = s.Math;
student.Science = s.Science;
using (StudentEntities context = new StudentEntities())
{
if (type == 0)
{
context.Students.Add(student);
}
else
{
context.Entry(student).State = System.Data.Entity.EntityState.Modified;
}
context.SaveChanges();
}
return(result);
}
static void Main()
{
Stu <string> stu = new Stu <string>();
Action <string> action = new Action <string>(stu.Goodbye);
action("\nIch liebe dich,Yuchen!");
}
public static List <Stu> GetStus()
{
if (stuList.Count > 0)
{
return(stuList);
}
for (int i = 0; i < 100000; i++)
{
var stui = new Stu();
stui.Id = i;
stui.Name = "name1" + i;
stui.Name2 = "name2" + i;
stui.Name3 = "name3" + i;
stui.Name4 = "name4" + i;
stui.Name5 = "name5" + i;
stui.Name6 = "name6" + i;
stui.Name7 = "name7" + i;
stui.Name8 = "name8" + i;
stui.Name9 = "name9" + i;
stui.Name10 = "name10" + i;
stui.Name11 = "name11" + i;
stui.Name12 = "name12" + i;
stui.Name13 = "name13" + i;
stui.Name14 = "name14" + i;
stui.Name15 = "name15" + i;
stui.Name16 = "name16" + i;
stuList.Add(stui);
}
return(stuList);
}
public List <Stu> GetStu(int PageNumber, int PageSize, string DataOrderBy, string safeSqlCondition)
{
StringBuilder commandText = new StringBuilder();
commandText.Append("SELECT TOP " + PageSize + " * FROM (SELECT ROW_NUMBER() OVER (ORDER BY " + DataOrderBy + ") AS RowNumber,* FROM Stu ");
commandText.Append(" WHERE " + safeSqlCondition + " ");//这里修改条件语句
commandText.Append(" ) AS T WHERE RowNumber > (" + PageSize + "*(" + PageNumber + "-1))");
DataSet ds = SqlHelper.ExecuteDataset(SqlHelper.ConnString, CommandType.StoredProcedure, commandText.ToString());
List <Stu> list = new List <Stu>();
if (ds.Tables.Count > 0)
{
DataTable dt = ds.Tables[0];
foreach (DataRow row in dt.Rows)
{
Stu stu = new Stu();
stu.StuID = (int)row["StuID"];
stu.StuName = (string)row["StuName"];
stu.StuClass = (int)row["StuClass"];
stu.StuGrade = row["StuGrade"] != DBNull.Value ? (int)row["StuGrade"] : 0;
stu.StuTel = (string)row["StuTel"];
list.Add(stu);
}
}
return(list);
}
public ActionResult Create(Stu stu)
{
if (ModelState.IsValid)
{
db.Stus.Add(stu);
db.SaveChanges();
return(RedirectToAction("reg"));
}
return(View(stu));
}
public ActionResult Edit(string id)
{
Stu s = db.Stus.Find(id);
if (s == null)
{
return(HttpNotFound());
}
return(View(s));
}
public ActionResult Edit(Stu s)
{
if (ModelState.IsValid)
{
db.Entry(s).State = EntityState.Modified;
db.SaveChanges();
return(RedirectToAction("reg"));
}
return(View(s));
}
public ActionResult Edit(Stu s)
{
try
{
UpdateStudent(s, 1);
return(View("Index", GetStudentList()));
}
catch (Exception)
{
return(View("Index", new List <Stu>()));
}
}
public ActionResult Create(Stu s)
{
try
{
UpdateStudent(s, 0);
return(View("Index", GetStudentList()));
}
catch (Exception)
{
return(View("Create"));
}
}
public ActionResult EditStu(Stu stu)
{
try
{
new StuManager().ModifyStu(stu);//调用修改学生信息方法
return(Content("<script type='text/javascript'>alert('修改成功！');location.href='" + Url.Action("StuList", "Admin") + "' </script>"));
}
catch (Exception)
{
return(Content("<script type='text/javascript'>alert('信息不合法！');location.href='" + Url.Action("EditStu", "Admin") + "' </script>"));
}
}
public ActionResult AddStu()
{
Stu stu = new Stu();//定义一个Stu类
//stu.StuID = Convert.ToInt32(Request.QueryString["stu.StuID"]);
//定义stu的默认值
stu.StuID = 20130000;
stu.StuPwd = "1111";
stu.StuClass = 1;
stu.StuGrade = 1;
stu.StuTel = "0000000";
return(View(stu));
}
private void Awake()
{
Singleton = this;
var t = Camera.main.transform;
t.SetParent(cameraAnchor, false);
t.localPosition = Vector3.zero;
launcherAnchor.SetParent(t, false);
LookTarget = t;
}
public ActionResult AddStu(Stu stu)
{
try
{
new StuManager().AddStu(stu);//调用添加学生信息方法
return(Content("<script type='text/javascript'>alert('添加成功！');location.href='" + Url.Action("AddStu", "Admin") + "' </script>"));
}
catch (Exception)
{
return(Content("<script type='text/javascript'>alert('学生编号重复！');location.href='" + Url.Action("AddStu", "Admin") + "' </script>"));
}
}
public ActionResult ModifyStuPaw(Stu stu)
{
try
{
//调用修改学生信息方法
new StuManager().ModifyStu(stu);
return(Content("<script type='text/javascript'>alert('修改成功！');location.href='" + Url.Action("ModifyStuPaw", "Stu") + "' </script>"));
}
catch (Exception)
{
return(Content("<script type='text/javascript'>alert('信息不合法！');location.href='" + Url.Action("ModifyStuPaw", "Stu") + "' </script>"));
}
}
static void Main(string[] args)
{
Stu s1 = new Stu("Mr. MeeSeeks");
Course c1 = new Course("C#", 9990);
Course c2 = new Course("Java", 12800);
Course c3 = new Course("Java II", 12300);
Cart cart = new Cart(s1);
s1.BuyCourse(c1);
s1.BuyCourse(c2);
s1.BuyCourse(c3);
Console.WriteLine(
$" Total is ${cart.GetPrice()}"
);
Console.ReadLine();
}
public async Task DbContextExtension_TestAsync()
{
var context = GetDbContext();
var id = Guid.Parse("f0158dca-e568-47ec-9980-07503ab389ef");
//await context.Stus.AddAsync(new Stu
//{
// Id = id,
// Name = "121",
//});
//await context.SaveChangesAsync();
//var stu = new Stu
//{
// Id = id,
// Name = "312312331235435",
// Score = 20
//};
//context.Stus.Update(stu, true, b => b.Name);
//await context.SaveChangesAsync();
//context.Stus.SoftDelete(new Stu { Id = id });
//context.Stus.Delete(id);
//await context.SaveChangesAsync();
var stu1 = new Stu
{
Id = id,
Name = "31231233123543531231",
Score = 20
};
//context.Add(stu1);
//await context.SaveChangesAsync();
//context.Update(stu1, true, b => b.Name);
//await context.SaveChangesAsync();
//context.SoftDelete<Stu, Guid>(id);
//await context.SaveChangesAsync();
context.Delete(stu1);
await context.SaveChangesAsync();
}
static void Main(string[] args)
{
Car car = new Car(4, 20);
SmallCar smallCar = new SmallCar(4, 20, 20);
BigCar bigCar = new BigCar(8, 40, 3, 500);
Console.WriteLine(bigCar.Print());
Shape shape = new Circle(1, 2);
Console.WriteLine(shape.GetArea());
BaseClass baseClass = new BaseClass();
BaseClass ba = new DerivedClass();
DerivedClass derivedClass = new DerivedClass();
baseClass.fn1();
baseClass.fn2();
ba.fn1();
ba.fn2();
derivedClass.fn1();
derivedClass.fn2();
Cat cat = new Cat();
Dog dog = new Dog();
Student student = new Student();
for (int i = 0; i < 10; i++)
{
Stu stu = new Stu();
stu.stuName = stu.stunNum = Convert.ToString(i);
stu.score.cs = stu.score.eng = stu.score.math = i;
stu.score.avg = (stu.score.cs + stu.score.eng + stu.score.math) / 3;
student.enqueue(stu);
}
student.Print();
Stacks stacks = new Stacks();
for (int i = 0; i < 10; i++)
{
Book book = new Book();
book.author = book.bookName = book.publish = Convert.ToString(i);
book.price = i;
stacks.Push(book);
}
stacks.Print();
}
public List <Stu> GetStu(StuQuery category, string keyWord)
{
List <Stu> list = new List <Stu>();
//category.CompareTo(StuQueryCategories.书名)
string sql = "SELECT * FROM Stu where ";
if (String.Compare(category.ToString(), "学号", true) == 0)
{
sql = sql + " StuID LIKE '%" + keyWord + "%'";
}
else if (String.Compare(category.ToString(), "姓名", true) == 0)
{
sql = sql + " StuName LIKE '%" + keyWord + "%'";
}
else if (String.Compare(category.ToString(), "年级", true) == 0)
{
sql = sql + " StuGrade LIKE '%" + keyWord + "%'";
}
else if (String.Compare(category.ToString(), "班级", true) == 0)
{
sql = sql + " StuClass LIKE '%" + keyWord + "%'";
}
//DataSet ds = SqlHelper.ExecuteDataset(SqlHelper.ConnString, "sp_QueryStus", category, keyWord);
DataSet ds = SqlHelper.ExecuteDataset(SqlHelper.ConnString, CommandType.Text, sql);
if (ds.Tables.Count > 0)
{
DataTable dt = ds.Tables[0];
foreach (DataRow row in dt.Rows)
{
Stu stu = new Stu();
stu.StuID = (int)row["StuID"];
stu.StuName = (string)row["StuName"];
stu.StuClass = (int)row["StuClass"];
stu.StuGrade = row["StuGrade"] != DBNull.Value ? (int)row["StuGrade"] : 0;
stu.StuTel = (string)row["StuTel"];
list.Add(stu);
}
}
return(list);
}
//增加
public void AddStu(Stu stu)
{
//1、sql语句
string sql = "insert into Stu(StuID,StuPwd,StuName,StuClass,StuGrade,StuTel) values(@StuID,@StuPwd,@StuName,@StuClass,@StuGrade,@StuTel)";
//sql += " select @@IDENTITY";
//2、参数赋值
SqlParameter[] para = new SqlParameter[]
{
new SqlParameter("@StuID", stu.StuID),
new SqlParameter("@StuPwd", stu.StuPwd),
new SqlParameter("@StuName", stu.StuName),
new SqlParameter("@StuClass", stu.StuClass),
new SqlParameter("@StuGrade", stu.StuGrade),
new SqlParameter("@StuTel", stu.StuTel)
};
//3、执行sql
stu.StuID = Convert.ToInt32(SqlHelper.ExecuteScalar(SqlHelper.ConnString, CommandType.Text, sql, para));
}
//修改
public bool ModifyStu(Stu stu)
{
string sql = "UPDATE Stu " +
" SET StuPwd = @StuPwd," +
" StuName = @StuName," +
" StuClass = @StuClass," +
" StuGrade = @StuGrade," +
" StuTel = @StuTel WHERE " +
"StuID = @StuID";
SqlParameter[] para = new SqlParameter[]
{
new SqlParameter("@StuID", stu.StuID),
new SqlParameter("@StuPwd", stu.StuPwd),
new SqlParameter("@StuName", stu.StuName),
new SqlParameter("@StuClass", stu.StuClass),
new SqlParameter("@StuGrade", stu.StuGrade),
new SqlParameter("@StuTel", stu.StuTel)
};
return(SqlHelper.ExecuteNonQuery(SqlHelper.ConnString, CommandType.Text, sql, para) > 0);
}
public ActionResult Edit(int id)
{
try
{
Student s = GetStudent(id);
Stu stu = new Stu();
stu.NRIC = s.NRIC;
stu.StudentName = s.Name;
stu.Birthday = s.Birthday;
stu.AvailableDate = s.AvailableDate;
stu.Gender = s.Gender;
stu.English = s.English;
stu.Math = s.Math;
stu.Science = s.Science;
return(View(stu));
}
catch (Exception)
{
return(View("Index", new List <Stu>()));
}
}
public List <Stu> GetStu()
{
List <Stu> list = new List <Stu>();
string sql = "SELECT * FROM Stu ORDER BY StuID";
DataSet ds = SqlHelper.ExecuteDataset(SqlHelper.ConnString, CommandType.Text, sql);
if (ds.Tables.Count > 0)
{
DataTable dt = ds.Tables[0];
foreach (DataRow row in dt.Rows)
{
Stu stu = new Stu();
stu.StuID = (int)row["StuID"];
stu.StuName = (string)row["StuName"];
stu.StuClass = (int)row["StuClass"];
stu.StuGrade = row["StuGrade"] != DBNull.Value ? (int)row["StuGrade"] : 0;
stu.StuTel = (string)row["StuTel"];
list.Add(stu);
}
}
return(list);
}
static void Main()
{
try
{
Stu stu1 = new Stu();
stu1.SetAge(20);
Stu stu2 = new Stu();
stu2.SetAge(20);
Stu stu3 = new Stu();
// 赋予字段非法值 导致字段被污染 可以在类中定义get和set字段的方法来保护字段
stu3.SetAge(200);
var avgAge = (stu1.GetAge() + stu2.GetAge() + stu3.GetAge()) / 3;
Console.WriteLine(avgAge);
}
catch (Exception ex)
{
throw;
}
}
//查询
public Stu GetStuById(string id)
{
//sql语句
string sql = "SELECT * FROM Stu where StuID=@id";
Stu stu = null;
using (SqlDataReader row = SqlHelper.ExecuteReader(SqlHelper.ConnString, CommandType.Text, sql, new SqlParameter("@id", id)))
{
if (row.Read())
{
stu = new Stu();
stu.StuID = (int)row["StuID"];
stu.StuPwd = (string)row["StuPwd"];
stu.StuName = (string)row["StuName"];
stu.StuClass = (int)row["StuClass"];
stu.StuGrade = (int)row["StuGrade"];
stu.StuTel = (string)row["StuTel"];
}
}
return(stu);
}
/// <summary>
/// 登陆处理
/// </summary>
/// <param name="loginId">登陆账号</param>
/// <param name="password">登录密码</param>
/// <returns></returns>
public ActionResult Login(string loginId, string password)
{
//1、获取数据
string charge = Request.Form["identity"];
//2、非空验证
if (string.IsNullOrEmpty(loginId))
{
return(View("Login"));//返回login视图
}
if (string.IsNullOrEmpty("password"))
{
return(View("Login"));//返回login视图
}
//3、数据库验证，判定登陆是否成功
if (charge == "教师")
{
TeacherManager tm = new TeacherManager();
Teacher teacher = new Teacher();
if (tm.TeacherLogIn(loginId, password, out teacher))
{
//4、记住用户名和密码 cookie
string recordMe = Request.Form["RecordMe"];
if (!string.IsNullOrEmpty(recordMe))//记录用户名和密码
{
HttpCookie nameCookie = new HttpCookie("loginId", loginId);
nameCookie.Expires = DateTime.MaxValue;
Response.Cookies.Add(nameCookie);
HttpCookie passwordCookie = new HttpCookie("password", password);
nameCookie.Expires = DateTime.MaxValue;
Response.Cookies.Add(passwordCookie);
}
else
{
//让Cookie失效
Response.Cookies["loginId"].Expires = DateTime.Now.AddDays(-1);
Response.Cookies["password"].Expires = DateTime.Now.AddDays(-1);
}
//5、保存用户的状态 sesion
teacher = new TeacherManager().GetTeacherById(loginId);
Session["CurrentUser"] = loginId;
Session["UserName"] = teacher.TeacherName;
//登陆成功页面
return(Redirect("~/Teacher/Index"));
}
else
{
//返回登陆页面
return(View("Login"));
}
}
if (charge == "学生")
{
StuManager tm = new StuManager();
Stu stu = new Stu();
if (tm.StuLogIn(loginId, password, out stu))
{
//4、记住用户名和密码 cookie
string recordMe = Request.Form["RecordMe"];
if (!string.IsNullOrEmpty(recordMe))//记录用户名和密码
{
HttpCookie nameCookie = new HttpCookie("loginId", loginId);
nameCookie.Expires = DateTime.MaxValue;
Response.Cookies.Add(nameCookie);
HttpCookie passwordCookie = new HttpCookie("password", password);
nameCookie.Expires = DateTime.MaxValue;
Response.Cookies.Add(passwordCookie);
}
else
{
//让Cookie失效
Response.Cookies["loginId"].Expires = DateTime.Now.AddDays(-1);
Response.Cookies["password"].Expires = DateTime.Now.AddDays(-1);
}
//5、保存用户的状态 sesion
stu = new StuManager().GetStuById(loginId);
Session["CurrentUser"] = loginId;
Session["UserName"] = stu.StuName;
//登陆成功页面
return(Redirect("~/Stu/Index"));
}
else
{
//返回登陆页面
return(View("Login"));
}
}
if (charge == "管理员")
{
AdminManager tm = new AdminManager();
Admin admin = new Admin();
if (tm.AdminLogIn(loginId, password, out admin))
{
//4、记住用户名和密码 cookie
string recordMe = Request.Form["RecordMe"];
if (!string.IsNullOrEmpty(recordMe))//记录用户名和密码
{
HttpCookie nameCookie = new HttpCookie("loginId", loginId);
nameCookie.Expires = DateTime.MaxValue;
Response.Cookies.Add(nameCookie);
HttpCookie passwordCookie = new HttpCookie("password", password);
nameCookie.Expires = DateTime.MaxValue;
Response.Cookies.Add(passwordCookie);
}
else
{
//让Cookie失效
Response.Cookies["loginId"].Expires = DateTime.Now.AddDays(-1);
Response.Cookies["password"].Expires = DateTime.Now.AddDays(-1);
}
//5、保存用户的状态 sesion
Session["CurrentUser"] = loginId;
Session["UserName"] = loginId;
//登陆成功页面
return(Redirect("~/Admin/Index"));
}
else
{
//返回登陆页面
return(View("Login"));
}
}
else
{
//返回登陆页面
return(View("Login"));
}
}
void OnDestroy()
{
Singleton = null;
}
public void LookAt(Stu stu)
{
LookAt(stu.LookTarget);
}