Question

有没有什么方法可以像在C＃中一样将公共属性放在VB.NET中的一行？每次我尝试将所有内容都移到一行时，我会收到一堆错误。

C＃：

public void Stub{ get { return _stub;} set { _stub = value; } }

VB.NET

Public Property Stub() As String
    Get
        Return _stub
    End Get
    Set(ByVal value As String)
        _stub = value
    End Set
End Property

由于

编辑：我应该澄清一下，我正在使用VB 9.0。

Answer 1

您可以在VB 10和C#中使用自动实施的属性，这两个属性都会比您显示的C＃短：

public string Stub { get; set; }

Public Property Stub As String

对于非平凡的属性，听起来你可以放弃将所有内容放在VB中的一行 - 但因为它更冗长，我怀疑你最终会有一个很长的线，伤害可读性......

Answer 2

是的，你可以

Public Property Stub() As String : Get : Return _stub : End Get : Set(ByVal value As String) :_stub = value : End Set : End Property

你甚至可以缩短它，而且根本不可读; - ）

Public Property Stub() As String:Get:Return _stub:End Get:Set(ByVal value As String):_stub = value:End Set:End Property

Answer 3

如果愿意使用稍微不同的语法，就可以在一行上定义一个行为类似于属性的变量，并链接到C＃程序集（或使用IL）。

经过VS2017和.Net 4.7.2的测试。

C＃代码（当前在VB.Net中不可用）：

public class Propertor<T>
{
    public T payload;
    private Func<Propertor<T>, T> getter;
    private Action<Propertor<T>, T> setter;

    public T this[int n = 0]
    {
        get
        {
            return getter(this);
        }
        set
        {
            setter(this, value);
        }
    }

    public Propertor(Func<T> ctor = null, Func<Propertor<T>, T> getter = null, Action<Propertor<T>, T> setter = null)
    {
        if (ctor != null) payload = ctor();
        this.getter = getter;
        this.setter = setter;
    }
    private Propertor(T el, Func<Propertor<T>, T> getter = null)
    {
        this.getter = getter;
    }
    public static implicit operator T(Propertor<T> el)
    {
        return el.getter != null ? el.getter(el) : el.payload;
    }
    public override string ToString()
    {
        return payload.ToString();
    }
}

然后在您的VB程序中，例如：

Private prop1 As New Propertor(Of String)(ctor:=Function() "prop1", getter:=Function(self) self.payload.ToUpper, setter:=Sub(self, el) self.payload = el + "a")
Private prop2 As New Propertor(Of String)(ctor:=Function() "prop2", getter:=Function(self) self.payload.ToUpper, setter:=Sub(self, el) self.payload = el + "a")
public Sub Main()
    Console.WriteLine("prop1 at start : " & prop1.ToString)
    Dim s1 As String = prop1
    Console.WriteLine("s1 : " & s1)
    Dim s2 As String = prop1()
    Console.WriteLine("s2 : " & s2)
    prop1() = prop1()
    Console.WriteLine("prop1 reassigned : " & prop1.ToString)
    prop1() = prop2()
    Console.WriteLine("prop1 reassigned again : " & prop1.ToString)
    prop1() = "final test"
    Console.WriteLine("prop1 reassigned at end : " & prop1.ToString)
end sub

结果是：

prop1 at start : prop1
s1 : PROP1
s2 : PROP1
prop1 reassigned : PROP1a
prop1 reassigned again : PROP2a
prop1 reassigned at end : final testa

VB.NET Public Property在一行上

3 个答案: