VB.NET之类属性
有三种需要举例的
-
Public Property Rank() As String '注意这里的属性名后面有个括号
Get
Return strPos
End Get
Set(ByVal value As String)
strPos = value
End Set
End Property
Public ReadOnly Property rHobby() As String 'Readonly要在Property前面
Get
Dim i As Integer
Dim s As String
s = Join(strHobby, ",") '这个函数就是用来连接数组中的字符串的
Return s
End Get
End Property
3、'这是定义索引器呀!
Public ReadOnly Property indexHobby(ByVal index As Integer) As String
Get
If (strHobby Is Nothing) Or (index > UBound(strHobby)) Then
'注意到上面的UBound()了没?还有LBound()!
'它们所在的命名空间是Microsoft.VisualBasic
Return Nothing
End If
Return strHobby(index)
End Get
End Property4、
Public WriteOnly Property wHobby() As String
Set(ByVal value As String)
If value Is Nothing Then
If Not (strHobby Is Nothing) And strHobby.GetLength(0) > 1 Then
ReDim Preserve strHobby(UBound(strHobby) - 1)
End If
Else
If strHobby Is Nothing Then
ReDim strHobby(0)
Else
ReDim Preserve strHobby(UBound(strHobby) + 1)
End If
strHobby(UBound(strHobby)) = value
End If
End Set
End Property
5、
Default Public Property Words(ByVal index As Integer) As String'注意Default
Get '注意到参数了吗?使用这个属性的时候,就跟实现了索引器效果一样。<ClassObj(index)>
Words = theWords(index)
End Get
Set(ByVal value As String)
theWords(index) = value
End Set
End Property