我如何在VB.NET中声明嵌套函数?例如,我想做这样的事情:
Function one() Function two() End Function End Function
但是,由于未封闭的功能,此声明在VB.NET中无效.
解决方法
你在问如何写一个
lambda expression吗?
A lambda expression is a function or subroutine without a name that can be used wherever a delegate is valid. Lambda expressions can be functions or subroutines and can be single-line or multi-line. You can pass values from the current scope to a lambda expression.
You create lambda expressions by using the Function or Sub keyword,just as you create a standard function or subroutine. However,lambda expressions are included in a statement.
例如,以下代码将打印“Hello World!”:
Dim outputString As Action(Of String) = Sub(x As String) Console.WriteLine(x) End Sub outputString("Hello World!")
有关更多示例,请参见此处:VB.NET Lambda Expression
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