C# 8 新的 switch 能否替换包含多个 ? : 表达式的代码块？

Question

这里是我现在正在做的一个例子：

以下是一个示例，展示了我的操作：

return
    shpc == 0 ? "Currently, based on your selection below, you have not yet identified any hidden cards in your card deck." :
    shpc == 1 ? "Currently, based on your selection below, you have one hidden card in your card deck." :
                $"Currently, based on your selection below, you have {shpc} hidden cards in your card deck. These will not be visible.";

虽然我知道代码中添加了switch关键字，但是对于这个关键字的具体内容并不是很熟悉。我想知道能否使用switch表达式来实现同样的功能。

- Samantha J T Star

---

你可以用“经典”的开关替换它，不需要使用C#8的新功能特性。 - Gian Paolo

@GianPaolo，使用switch表达式比在case块中使用大量return或直接变量赋值的switch语句更加简洁和易于使用。 - Panagiotis Kanavos

Answer 1

试试这个

return shpc switch 
{
    0 => "Currently, based on your selection below, you have not yet identified any hidden cards in your card deck.",
    1 => "Currently, based on your selection below, you have one hidden card in your card deck.",
    _ => $"Currently, based on your selection below, you have {shpc} hidden cards in your card deck. These will not be visible."
};

- Roman Marusyk

Answer 2

当然：

return shpc switch 
{
    0 => "Currently, based on your selection below, you have not yet identified any hidden cards in your card deck.",
    1 => "Currently, based on your selection below, you have one hidden card in your card deck.",
    _ => $"Currently, based on your selection below, you have {shpc} hidden cards in your card deck. These will not be visible."
};

- Alvin Sartor