新手问题：如何创建一个类来在Visual Basic Studio中保存数据？ [英] Newbie question: how do I create a class to hold data in Visual Basic Studio?

问题描述

我真的很抱歉。这似乎是一个令人难以置信的愚蠢的问题，但除非我问我永远不会想出来。我试图写一个程序，在Visual Basic中的csv文件中读取（试图放弃在C＃），我问一个朋友，我的编程比我好多了。他说我应该创建一个类来保存我读入的数据。

I'm really sorry. This must seem like an incredibly stupid question, but unless I ask I'll never figure it out. I'm trying to write a program to read in a csv file in Visual Basic (tried and gave up on C#) and I asked a friend of mine who is much better at programming than I am. He said I should create a class to hold the data that I read in.

问题是，我从来没有创建过类，或任何东西。我知道与类相关的所有术语，我从高层次了解类如何工作没有问题。

The problem is, I've never created a class before, not in VB, Java, or anything. I know all the terms associated with classes, I understand at a high level how classes work no problem. But I suck at the actual details of making one.

这是我做的：

Public Class TsvData

    Property fullDataSet() As Array

        Get
            Return ?????
        End Get

        Set(ByVal value As Array)

        End Set

    End Property

End Class

我得到了问号，我被卡住了。
类将保存大量数据，所以我做了一个数组。这可能是一个坏的举动。我不知道。所有我知道，它不能是一个字符串，它肯定不能是一个整数或浮点。

I got as far as the question marks and I'm stuck. The class is going to hold a lot of data, so I made it an array. That could be a bad move. I don't know. All i know is that it can't be a String and it certainly can't be an Integer or a Float.

对于Getter和Setter，原因我放置问号是因为我想返回整个数组。该类最终会有其他属性，这些属性基本上是相同数据的排列，但是这是当我想保存它或某事时我将使用的完整集合。现在我想返回整个数组，但是输入Return fullDataSet（）似乎不是一个好主意。我的意思是，属性的​​名称是fullDataSet（）。它只会产生某种循环。但是没有其他数据要返回。

As for the Getter and Setter, the reason I put the question marks in is because I want to return the whole array there. The class will eventually have other properties which are basically permutations of the same data, but this is the full set that I will use when I want to save it out or something. Now I want to return the whole Array, but typing "Return fullDataSet()" doesn't seem like a good idea. I mean, the name of the property is "fullDataSet()." It will just make some kind of loop. But there is no other data to return.

我应该在属性内部调整另一个数组，该数组已经是一个数组，

Should I Dim yet another array inside the property, which already is an array, and return that instead?

推荐答案

通常使用私有成员存储实际数据：

Usually you use a private member to store the actual data:

Public Class TsvData
Private _fullDataSet As String()
Public Property FullDataSet() As String()
    Get
        Return _fullDataSet
    End Get
    Set(ByVal value As String())
        _fullDataSet = value
    End Set
End Property

注意，这是一个糟糕的设计实例，因为它将一个概念耦合到一个具体的表示，并允许类的客户端修改内部，没有任何错误检查。返回 ReadOnlyCollection 或一些专用容器会更好。

Note that this is an instance of bad design since it couples a concept to a concrete representation and allows the clients of the class to modify the internals without any error checking. Returning a ReadOnlyCollection or some dedicated container would be better.

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