class - 在 VBA 中使用自定义数据类型

Question

我正在尝试在 VBA for Excel 中创建自定义数据类型。我们称这种数据类型为“卡车”。每辆卡车都有以下属性:

NumberOfAxles (this is an integer)
AxleWeights (this is an array of doubles)
AxleSpacings (this is an array of doubles)

我可以创建数据类型“truck”的多个实例(truck(1)、truck(2)...等)，并将上面列出的属性读/写到该实例吗？

示例:

Truck(1).NumberOfAxles = 2
Truck(1).AxleWeights(1) = 15.0
Truck(1).AxleWeights(2) = 30.0
Truck(1).AxleSpacings(1) = 8.0

Truck(2).NumberOfAxles = 3
Truck(2).AxleWeights(1) = 8.0
Truck(2).AxleWeights(2) = 10.0
Truck(2).AxleWeights(3) = 12.0
Truck(2).AxleSpacings(1) = 20.0
Truck(2).AxleSpacings(2) = 4.0

等等。上面的语法很可能是错误的，我只是想演示我需要提出的结构。

我正在尝试将数据写入数据结构并根据需要调用它，例如

Truck(i).NumberOfAxles
Truck(i).AxleWeights(j)
Truck(i).AxleSpacings(j)

非常感谢!

Answer 1

当然可以:

Option Explicit

'***** User defined type
Public Type MyType
     MyInt As Integer
     MyString As String
     MyDoubleArr(2) As Double
End Type

'***** Testing MyType as single variable
Public Sub MyFirstSub()
    Dim MyVar As MyType

    MyVar.MyInt = 2
    MyVar.MyString = "cool"
    MyVar.MyDoubleArr(0) = 1
    MyVar.MyDoubleArr(1) = 2
    MyVar.MyDoubleArr(2) = 3

    Debug.Print "MyVar: " & MyVar.MyInt & " " & MyVar.MyString & " " & MyVar.MyDoubleArr(0) & " " & MyVar.MyDoubleArr(1) & " " & MyVar.MyDoubleArr(2)
End Sub

'***** Testing MyType as an array
Public Sub MySecondSub()
    Dim MyArr(2) As MyType
    Dim i As Integer

    MyArr(0).MyInt = 31
    MyArr(0).MyString = "VBA"
    MyArr(0).MyDoubleArr(0) = 1
    MyArr(0).MyDoubleArr(1) = 2
    MyArr(0).MyDoubleArr(2) = 3
    MyArr(1).MyInt = 32
    MyArr(1).MyString = "is"
    MyArr(1).MyDoubleArr(0) = 11
    MyArr(1).MyDoubleArr(1) = 22
    MyArr(1).MyDoubleArr(2) = 33
    MyArr(2).MyInt = 33
    MyArr(2).MyString = "cool"
    MyArr(2).MyDoubleArr(0) = 111
    MyArr(2).MyDoubleArr(1) = 222
    MyArr(2).MyDoubleArr(2) = 333

    For i = LBound(MyArr) To UBound(MyArr)
        Debug.Print "MyArr: " & MyArr(i).MyString & " " & MyArr(i).MyInt & " " & MyArr(i).MyDoubleArr(0) & " " & MyArr(i).MyDoubleArr(1) & " " & MyArr(i).MyDoubleArr(2)
    Next
End Sub