C＃编译器可以编译VB.Net代码吗？

问题描述

我在ASP.NET书上找到了以下内容。我正在学习和好奇关于以下内容。

$ b $我的问题是，ASP.NET是否使用相同的编译器来编译VB.net和C＃？

Update： ）

可以C＃编译器编译VB.Net代码吗？

解决方案

他们有单独的编译器（csc.exe为C＃和VB.NET的vbc.exe），但他们都编译成IL，然后在运行时JIT将其编译成机器代码。

问题1：可以用C＃编译器编译VB.net代码吗？

答案1：不，它不能，你会看到在下面的例子。如果你试图这样做，它会给出一个错误，因为它寻找C＃语法。

问题2：我认为这是他们在书中说的。因为它是两个编译器，我觉得它是不兼容的

答案2：它不说你可以编译VB代码使用C＃，但它说，你可以混合在单个应用程序中的语言，就像我在下面的例子中，仍然能够编译C＃和VB（使用他们的编译器）。

请参阅下面的示例来了解它是如何工作的。我创建了一个解决方案与C＃项目与C＃类和VB项目与VB类。你不应该在同一个项目中混合使用C＃和VB类，因为它会在编译过程中忽略vb文件。

ClassCSharp.cs的内容：

 命名空间ClassLibraryCSharp 
 {
 public abstract class ClassCSharp 
 {
 public int MyProperty {get;组; } 
 
 protected abstract void Test（）; 
} 
} 
  

C＃ClassLibrary中ClassVBInCSharp.vb的内容。查看我如何继承C＃类，并访问其属性并覆盖该方法。

 命名空间ClassLibraryVB 
类ClassVBInCSharp 
 Inherits ClassCSharp 
 Property Test2 As Integer 
 
受保护的覆盖子测试（）
 Test2 = MyBase.MyProperty 
 End Sub 
 End类
结束命名空间
  

查看以下命令我运行：

  vbc.exe /reference:\"ClassLibraryCSharp.dll/ target：library /out:\"ClassLibraryCSharpVbVersion.dllClassVBInCSharp.vb
 Microsoft R）Visual Basic编译器版本12.0.20806.33440 
版权所有（c）Microsoft Corporation。版权所有。 
  

查看上文VB编译器用于编译vb类。

  csc.exe /reference:\"ClassLibraryCSharp.dll/ target：library /out:\"ClassLibraryCSharpVersion.dllClassVBInCSharp.vb
 Microsoft Visual C＃编译器版本4.0.30319.33440 for Microsoft（R）.NET Framework 4.5 
版权所有（C）Microsoft Corporation。版权所有。 
 
 ClassLibrary1 \ClassVBInCSharp.vb（1,1）：error CS 
 0116：命名空间不能直接包含字段或方法等成员
  
 
 
 
如果我试图使用C＃Compiler来编译vb类，它会在查找C＃语法时抛出一个错误。
 
I found following on a ASP.NET book. I am learning and curious about following content.
My question is , does ASP.NET use same compiler to compile VB.net and C#?

Update: (Another query)

Can C# compiler compile a VB.Net code ?
 解决方案 
They have separate compilers (csc.exe for C# and vbc.exe for VB.Net) but they both get compiled into IL and then at run-time JIT compiles it into machine code. 

Question 1 : can C# compiler compile VB.net code? 

Answer 1: No it can't and you will see that in the below example. It gives an error if you try to do that as it looks for C# syntax.

Question 2: I think that's what they say in the book. Since it is two compilers, I feel it is not compatible

Answer 2: It doesn't say that you can compile VB code using C# but it says that you can mix languages in a single application like I did in the example below and still able to compile C# and VB (using their compilers). 

See below example to understand how it works. I created a solution with a C# project with a C# class and a VB project with a VB class. You should not mix C# and VB classes in same project as it will ignore the vb file if its a C# project during build.



Content of ClassCSharp.cs:
namespace ClassLibraryCSharp
{
    public abstract class ClassCSharp
    {
        public int MyProperty { get; set; }

        protected abstract void Test();
    }
}
Content of ClassVBInCSharp.vb in C# ClassLibrary. See how I can inherit from a C# class and also access its properties and override the method.
Namespace ClassLibraryVB
    Public Class ClassVBInCSharp
        Inherits ClassCSharp
        Property Test2 As Integer

        Protected Overrides Sub Test()
            Test2 = MyBase.MyProperty
        End Sub
    End Class
End Namespace
See below commands I ran: 
vbc.exe /reference:"ClassLibraryCSharp.dll" /target:library /out:"ClassLibraryCSharpVbVersion.dll" "ClassVBInCSharp.vb"
Microsoft (R) Visual Basic Compiler version 12.0.20806.33440
Copyright (c) Microsoft Corporation.  All rights reserved.
See above VB Compiler is used to compile vb class.
csc.exe /reference:"ClassLibraryCSharp.dll" /target:library /out:"ClassLibraryCSharpVersion.dll" "ClassVBInCSharp.vb"
Microsoft (R) Visual C# Compiler version 4.0.30319.33440 for Microsoft (R) .NET Framework 4.5
Copyright (C) Microsoft Corporation. All rights reserved.

ClassLibrary1\ClassVBInCSharp.vb(1,1): error CS
0116: A namespace cannot directly contain members such as fields or methods
See above if I try to use C# Compiler to compile vb class it throws an error as its looking for C# syntax.
                        
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