VB.Net - 嵌套 Select Case 语句

可以将 select 语句作为外部 select 语句的语句序列的一部分。 即使内部和外部 select 的 case 常量包含共同的值，也不会发生冲突。

示例

Module decisions
   Sub Main()
      '局部变量定义
      Dim a As Integer = 100
      Dim b As Integer = 200
      Select a
         Case 100
            Console.WriteLine("This is part of outer case ")
            Select Case b
               Case 200
                  Console.WriteLine("This is part of inner case ")
            End Select
         End Select
      Console.WriteLine("Exact value of a is : {0}", a)
      Console.WriteLine("Exact value of b is : {0}", b)
      Console.ReadLine()
   End Sub
End Module

当上面的代码被编译并执行时，会产生以下结果 −

This is part of outer case
This is part of inner case
Exact value of a is : 100
Exact value of b is : 200

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