.net LINQtoSQL自定义构造函数关闭部分类?
我在这里读到这个问题: 通常,我的构造函数如下所示:.net LINQtoSQL自定义构造函数关闭部分类?,.net,linq,linq-to-sql,constructor,partial-classes,.net,Linq,Linq To Sql,Constructor,Partial Classes,我在这里读到这个问题: 通常,我的构造函数如下所示: public User(String username, String password, String email, DateTime birthday, Char gender) { this.Id = Guid.NewGuid(); this.DateCreated = this.DateModified = DateTime.Now; this.Username = user
public User(String username, String password, String email, DateTime birthday, Char gender)
{
this.Id = Guid.NewGuid();
this.DateCreated = this.DateModified = DateTime.Now;
this.Username = username;
this.Password = password;
this.Email = email;
this.Birthday = birthday;
this.Gender = gender;
}
但是,正如在该问题中所读到的,您希望使用partial方法OnCreated()来分配值,而不是覆盖默认构造函数。好的,我得到了这个:
partial void OnCreated()
{
this.Id = Guid.NewGuid();
this.DateCreated = this.DateModified = DateTime.Now;
this.Username = username;
this.Password = password;
this.Email = email;
this.Birthday = birthday;
this.Gender = gender;
}
但是,这给了我两个错误:
Partial Methods must be declared private.
Partial Methods must have empty method bodies.
好的,我将其更改为Private Sub OnCreated()
,以删除这两个错误。然而,我仍然坚持…我怎样才能像传递普通自定义构造函数一样传递它的值呢?
我也在用VB做这件事(因为我知道大多数人都知道/更喜欢C),所以这会对这件事产生影响吗?使用VB时,不应该将实现标记为
部分
,而应该简单地标记为私有
。请看以下示例:
Private Sub OnCreated()
' Your code here'
End Sub
使用VB时,不应将实现标记为
Partial
,而应简单地标记为Private
。请看以下示例:
Private Sub OnCreated()
' Your code here'
End Sub
无法将值传递到已创建的
中。您链接到的问题涉及重写默认构造函数的行为。听起来您希望使用如下参数化构造函数:
Public Sub New(username as String, password as String, email as String, birthday as DateTime, gender as Char)
User.New()
Me.Id = Guid.NewGuid()
Me.DateCreated = this.DateModified = DateTime.Now
Me.Username = username
Me.Password = password
Me.Email = email
Me.Birthday = birthday
Me.Gender = gender
End Sub
是否要创建如下所示的新用户:
Dim u as User = new User()
Dim u as User = new User("Name", "Password", "Email", etc)
或者像这样:
Dim u as User = new User()
Dim u as User = new User("Name", "Password", "Email", etc)
无法将值传递到已创建的中。您链接到的问题涉及重写默认构造函数的行为。听起来您希望使用如下参数化构造函数:
Public Sub New(username as String, password as String, email as String, birthday as DateTime, gender as Char)
User.New()
Me.Id = Guid.NewGuid()
Me.DateCreated = this.DateModified = DateTime.Now
Me.Username = username
Me.Password = password
Me.Email = email
Me.Birthday = birthday
Me.Gender = gender
End Sub
是否要创建如下所示的新用户:
Dim u as User = new User()
Dim u as User = new User("Name", "Password", "Email", etc)
或者像这样:
Dim u as User = new User()
Dim u as User = new User("Name", "Password", "Email", etc)
是的,我在帖子中对此进行了评论,但这并不能解决我试图实现的问题,而是像在典型的自定义构造函数中一样,将一些值传递给OnCreated。是的,我在帖子中对此进行了评论,但这并不能解决我试图实现的问题,那就是像在典型的自定义构造函数中一样将一些值传递到OnCreated中。啊,好吧,我没有想到那个用户。New(),我尝试创建自己的构造函数,但当我试图保存该对象时失败了,因为它没有包含自动生成的类所需的默认构造函数提供的很多内容。谢谢我只是想添加一个User.New()
不起作用,您会得到以下错误:构造函数调用仅在实例构造函数中的第一条语句时有效。相反,似乎有效的是
Me.New()`对不起,我对VB不是很了解。希望你能很快找到我的.New()。啊,好吧,我没有想到那个用户。New(),我只是尝试创建自己的构造函数,但当我试图保存那个对象时,它失败了,因为它没有包含默认构造函数提供的自动生成类所需的很多内容。谢谢我只是想添加一个User.New()
不起作用,您会得到以下错误:构造函数调用仅在实例构造函数中的第一条语句时有效。相反,似乎有效的是
Me.New()`对不起,我对VB不是很了解。希望你能很快找到我。