如何在最终用户编译的代码中加载内部类?(先进的) [英] How to load an internal class in end-user compiled code ? (advanced)

问题描述

我有一个包含两个类的主程序

I have a main program with two classes

1- 包含两个元素的 winform:

1- A winform that contains two elements :

• 备忘录编辑以输入一些代码；
• 名为 compile 的按钮.

最终用户可能会在备忘录编辑中键入一些 VB.Net 代码，然后对其进行编译.

The end user may type some VB.Net code in the memo edit and then compile it.

2 - 一个简单的测试类:

2 - A simple test class :

代码:

Public Class ClassTest
    Public Sub New()
        MsgBox("coucou")
    End Sub
End Class

现在我想在将在 MemoEdit 中输入的代码中使用类 ClassTest 然后编译它:

Now I would like to use the class ClassTest in the code that will be typed in the MemoEdit and then compile it :

点击编译时我收到错误:

When hitting compile I recieve the error :

原因是，编译器找不到命名空间ClassTest

The reason is that, the compiler can't find the namespace ClassTest

总结一下:

• 在主程序中创建了类 ClassTest
• 最终用户应该能够使用它并在运行时创建新程序集

有人知道怎么做吗?

预先感谢您的帮助.

WinForm 代码:​​

Code of the WinForm :

Public Class Form1
    Private Sub SimpleButtonCompile_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SimpleButtonCompile.Click
        Dim Code As String = Me.MemoEdit1.Text

        Dim CompilerResult As CompilerResults
        CompilerResult = Compile(Code)
    End Sub

    Public Function Compile(ByVal Code As String) As CompilerResults
        Dim CodeProvider As New VBCodeProvider
        Dim CodeCompiler As System.CodeDom.Compiler.CodeDomProvider = CodeDomProvider.CreateProvider("VisualBasic")

        Dim Parameters As New System.CodeDom.Compiler.CompilerParameters
        Parameters.GenerateExecutable = False

        Dim CompilerResult As CompilerResults = CodeCompiler.CompileAssemblyFromSource(Parameters, Code)

        If CompilerResult.Errors.HasErrors Then
            For i = 0 To CompilerResult.Errors.Count - 1
                MsgBox(CompilerResult.Errors(i).ErrorText)
            Next

            Return Nothing
        Else
            Return CompilerResult
        End If
    End Function
End Class

推荐答案

解决方案如下:

如果最终用户想要使用内部类，他应该使用命令:Assembly.GetExecutingAssembly

If the end user wants to use internal classes he should use the command : Assembly.GetExecutingAssembly

完整代码如下:

代码:

Imports System.Reflection
Imports System

Public Class EndUserClass
    Public Sub New()

        Dim Assembly As Assembly = Assembly.GetExecutingAssembly
        Dim ClassType As Type = Assembly.GetType(Assembly.GetName().Name & ".ClassTest")
        Dim Instance = Activator.CreateInstance(ClassType)

    End Sub 
End class

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