VB.NET等效于C＃7类型模式匹配 [英] VB.NET equivalent for C# 7 Type pattern matching

问题描述

是否有与此等效的VB.NET？ 请特别注意代码示例中的 bmp 。

Is there a VB.NET equivalent to this? Note in particular the bmp in the code sample.

public void MyMethod(Object obj)
{
    if (obj is Bitmap bmp)
    {
        // ...
    }
}

或者带有的短模式匹配语法是是C＃专有的？

Or the short pattern matching syntax with is is exclusive to C#?

编辑：

我已经知道这些语法：

    If TypeOf obj Is Bitmap Then
        Dim bmp As Bitmap = obj
        ' ...
    End If

或

    Dim bmp As Bitmap = TryCast(obj, Bitmap)
    If bmp IsNot Nothing Then
        ' ...
    End If

我想知道的是是否还有更短的内容，例如新的C＃7语法...

What I want to know is whether there is something even shorter, like that new C#7 syntax...

非常感谢你ch。

推荐答案

当前没有。如果要实现此目的，则必须使用在问题中已经提到的一些较长的格式。

Currently, no. If you want to implement this, you'll have to use some of the longer formats you already mention in your question.

C＃和VB语言并不总是具有等效功能。

The C# and VB languages don't always have equivalent features.

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