因此,我刚开始进入VB中的自定义类,并在尝试写入时遇到此错误。我试图按照老师的例子,但也想进入VB的一些更高级的方面,并尝试在我的类中使用数组,并且事情并不奏效。写入自定义类时为空引用异常
Form1类:
Dim mypt(7) As Point
Private Sub Create_Click(sender As Object, e As EventArgs) Handles Create.Click
PtSelect = Input() 'Returns an int
mypt(PtSelect).mC(0) = CDec(IX.Text) 'Error here!
mypt(PtSelect).mC(1) = CDec(IY.Text)
mypt(PtSelect).mC(2) = CDec(IZ.Text)
End Sub
点类:
Public Class Point
Private c(2) As Decimal
Public Sub New(ByVal X As Decimal, ByVal Y As Decimal, ByVal Z As Decimal)
c(0) = X
c(1) = Y
c(2) = Z
End Sub
Public Property mC(Val As Integer) As Decimal
Get
Return c(Val)
End Get
Set(value As Decimal)
c(Val) = value
End Set
End Property
End Class
真的只是不知该怎么办过去,这一点,我拨弄着,我能想到的可能是它,但我的一切不确定。我的老师确实说过,在我遇到错误之前,可以在类中使用数组,并且我想让它工作。
这正是它!谢谢您的帮助! – lukeb28