Question

.NET Gurus，

我已经选择了其他开发人员的工作，并创建了Class Level Public Property boolean isNewValue

但是，我无法从Property或"Shared" Subs Functions或Public <WebMethods> Public Shared Functions. >

我不明白为什么，有人可以解释一下吗？

' Public Property scoped as Public in the Public Class Class_Name
Public Property isNewValueCode As Boolean
    Get
        Return _isNewValueCode
    End Get
    Set(ByVal value As Boolean)
        _isNeValuewSrvCode = value
    End Set
End Property

稍后在我的代码中：

Shared Function GetDataItem(ByRef db As myEntities) As CodeDataItem


    THIS IS WHERE I NEED TO BE ADD AN IF
    If isNewValueCode Then 'Cannot see the isNewValueCode

          Dim data As New CodeDataItem
          Dim code = db.tbl_services.FirstOrDefault(Function(x) x.id = TargetID)
          If (Not code Is Nothing) Then
                data = New CodeDataItem(code)
          End If
    Else
         'New code going against different db.tables in Entity Context
    End If


    Return data
End Function



enter code here

Answer 1

如果没有该类的实例，则无法从共享函数访问非共享类成员。因此，为了能够访问isNewValueCode，您需要一个属性所属类的实例。
根据您的要求，您可以将属性更改为shared，但它不再是该类的任何实例的成员。

Answer 2

我想你有类似的东西：

Private _isNewValueCode As Boolean
Private _isNeValuewSrvCode As Boolean

Public Property isNewValueCode As Boolean
    Get
        Return _isNewValueCode
    End Get
    Set(ByVal value As Boolean)
        _isNeValuewSrvCode = value
    End Set
End Property

你在这里有几个选项，你可以创建isNewValue，它的私有构造函数是这样共享的：

Private Shared _isNewValueCode As Boolean
Private Shared _isNeValuewSrvCode As Boolean

Public Shared Property isNewValueCode As Boolean
    Get
        Return _isNewValueCode
    End Get
    Set(ByVal value As Boolean)
        _isNeValuewSrvCode = value
    End Set
End Property

或者假设 isNeValuewSrvCode是一个复制粘贴错误，你真的想将它分配回同一个变量，你可以这样做：

Public Shared Property isNewValueCode As Boolean

请查看MSDN Description of shared properties，详细了解shared关键字的确切内容。

具有共享的VB.NET范围：子和函数以及Web方法

2 个答案: