具有公共 getter 和私有 setter 的自动属性 [英] Auto Property with public getter and private setter

问题描述

注意:这不是VB.NET 等效于 C# 属性简写?.这个问题是关于如何对VB自动属性的getter和setter拥有不同的访问权限；例如公共 getter 和私有 setter.那个问题是关于自动属性的语法(并没有提到这个问题).

NOTE: This is not a duplicate of VB.NET equivalent of C# property shorthand?. This question is about how to have different access rights on getter and setter of a VB auto-property; e.g public getter and private setter. That question is about the syntax for auto-property (and does not mention this issue).

我正在尝试将自动属性(public getter 和 private setter)从 C# 转换为 VB.NET.

I am trying to convert an auto Property (public getter and private setter) from C# to VB.NET.

但转换后 VB.NET 维护一个私有字段.

But after conversion VB.NET is maintaining a private field.

C# 代码

class DemoViewModel
{
    DemoViewModel (){  AddCommand = new RelayCommand(); }

    public ICommand AddCommand {get;private set;}
}

VB.NET 等效于 代码转换器是

VB.NET equivalent from code converter is

Class DemoViewModel
Private Sub New()
    AddCommand = New RelayCommand()
End Sub

Public Property AddCommand() As ICommand
    Get
        Return m_AddCommand
    End Get
    Private Set
        m_AddCommand = Value
    End Set
End Property
Private m_AddCommand As ICommand
End Class

VB.NET 代码生成私有支持字段.

VB.NET code generates private backing field.

是否可以在源代码(如 c#)中去掉这个 back 字段?怎么样?

Is it possible to get rid of this back field in source code (like c#)? How?

如果没有这个特性，VB.NET 源码就会有很多这样的冗余.

Without this feature, VB.NET source will have lots of such redundancy.

推荐答案

使用 VB.NET，如果您希望为 Get 和 Set 过程指定不同的可访问性，则您不能使用自动实现的属性，并且必须使用标准或扩展的属性语法.

Using VB.NET, if you want to specify different accessibility for the Get and Set procedure, then you cannot use an auto-implemented property and must instead use standard, or expanded, property syntax.

阅读 MSDN:https://docs.microsoft.com/en-us/dotnet/visual-basic/programming-guide/language-features/procedures/auto-implemented-properties

如果 getter 和 setter 具有相同的可访问性，例如两者都是Public，那么你可以使用自动属性语法，例如:

If getter and setter have same accessibility, e.g. both are Public, then you can use the auto-property syntax, e.g.:

Public Property Prop2 As String = "Empty"

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