VB.. NET公共属性在一行上

本文关键字：一行 NET 属性 VB | 更新日期: 2023-09-27 18:09:26

是否有任何方法可以将公共属性放在VB的单行上?像c#一样。NET吗?每次我尝试将所有内容移到一行时，我都会得到一堆错误。

c#: 

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

VB。净

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

感谢

编辑:我应该澄清一下，我使用的是VB 9.0。

VB.. NET公共属性在一行上

您可以在VB 10和c#中使用自动实现的属性，两者都将比您展示的c#更短:

public string Stub { get; set; }
Public Property Stub As String

对于不重要的属性，听起来你可以将所有内容放在VB中的一行中-但是因为它有点冗长，我怀疑你最终会用很长的一行，损害可读性…

可以

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

，你甚至可以使它更短，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

如果您愿意使用稍微不同的语法，并链接到c#程序集(或使用IL)，则可以在一行中定义一个变量，其行为类似于属性。

已在VS2017和。net 4.7.2中测试。

c#代码(目前在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
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