基于参数动态声明和实例化对象答案

【问题标题】：Dynamically declaring and instantiating objects based on a parameter基于参数动态声明和实例化对象
【发布时间】：2018-03-13 16:30:12
【问题描述】：

是否可以在VB.net中根据参数动态声明和实例化对象？

我必须声明我希望实例化的每一个对象似乎很疯狂。

下面的代码不起作用，但也许有某种解决方法可以达到相同的结果？

Public Class Form1
    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Dim jeff As String = "Jeff"
        DynamicDeclare(jeff)
    End Sub


    Private Sub DynamicDeclare(ByVal objectName As String)
        Dim objectName As New Person
    End Sub
End Class

Class Person
    Property FirstName As String
    Property Age As Integer
End Class

【问题讨论】：

你到底想做什么？
在“Denamicly Declaring”之前，您将如何准确地在代码中引用一个不存在的对象？
这只是问题的一个模型，但我有一个表单类，我希望通过发送选择案例语句的结果来声明和实例化它。这些参数包含每个表单的所有信息——表单名称（用于对 UI 进行轻微修改）和数据，也用于 UI

标签： vb.net declaration instantiation

【解决方案1】：

使用反射，这样的事情可能会满足您的需求。我还没有测试过，但它应该可以工作。

Public Class Form1
    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Dim jeff As String = "Jeff"
        Dim methodName as string = "DynamicDeclare"
        Dim type as Type = GetType(Person)
        Dim method as System.Reflection.MethodInfo = type.GetMethod(methodName)
        Dim person as Person = method.Invoke(Nothing, new object(){jeff})
    End Sub
End Class

Public Class Person
   Property FirstName As String
   Property Age As Integer

    Public Function DynamicDeclare(ByVal objectName As String) as Person
       Dim person As New Person
       person.FirstName = objectName
       Return person
    End Function
End Class

【讨论】：