方法一、先查询出来,然后在删除,代码如下:
CodeFirstContext context = new CodeFirstContext();
TUsers user = context.Users.Where(d => d.UserId == 0).FirstOrDefault<TUsers>();
if (user != null)
{
context.Users.Remove(user);
}
var affectcount = context.SaveChanges();
Console.WriteLine(string.Format("删除了{0}条记录", affectcount));
var userlist = context.Users.ToList();
foreach (var u in userlist)
{
Console.WriteLine(string.Format("账号:{0} 密码:{1}", u.Account, u.Password));
}
方法二、自己创建一个对象,然后附加,然后删除,代码如下:
CodeFirstContext context = new CodeFirstContext();
TUsers user = new TUsers
{
UserId = 1
};
context.Users.Attach(user);
context.Users.Remove(user);
var affectcount = context.SaveChanges();
Console.WriteLine(string.Format("删除了{0}条记录", affectcount));
var userlist = context.Users.ToList();
foreach (var u in userlist)
{
Console.WriteLine(string.Format("账号:{0} 密码:{1}", u.Account, u.Password));
}
方法三、自己创建对象,然后放入EF容器,然后删除,代码如下:
CodeFirstContext context = new CodeFirstContext();
TUsers user = new TUsers
{
UserId = 2
};
context.Entry(user).State = EntityState.Deleted;
var affectcount = context.SaveChanges();
Console.WriteLine(string.Format("删除了{0}条记录", affectcount));
var userlist = context.Users.ToList();
foreach (var u in userlist)
{
Console.WriteLine(string.Format("账号:{0} 密码:{1}", u.Account, u.Password));
}