public void Delete(Classandgrade classandgrade)
{
using (var db = new ClassContext())
{
db.Entry(classandgrade).State = EntityState.Deleted;
db.SaveChanges();
}
}
public void Add(Classandgrade classandgrade)
{
using (var db = new ClassContext())
{
db.Classandgrade.Add(classandgrade);
db.SaveChanges();
}
}
static void Delete()
{
Console.Write("请输入ID:");
int id = int.Parse(Console.ReadLine());
BlogBusinessLayert bbl = new BlogBusinessLayert();
Classandgrade cla = bbl.Query(id);
bbl.Delete(cla);
}
static void QueryClass()
{
Console.WriteLine("请输入一个课程:");
string b = Console.ReadLine();
Classandgrade cla = new Classandgrade();
cla.Curriculum = b;
BlogBusinessLayert bbl = new BlogBusinessLayert();
bbl.Add(cla);
}
static void Update()
{
Console.Write("请输入要修改的ID:");
int id = int.Parse(Console.ReadLine());
BlogBusinessLayert bbl = new BlogBusinessLayert();
Classandgrade cla = bbl.Query(id);
Console.Write("请输入要修改的消息:");
string name = Console.ReadLine();
cla.Curriculum = name;
bbl.Update(cla);
}