有没有一种方法可以使用三元运算符-或类似的方法-来选择要分配给该变量的变量? [英] Is there a way to use a ternary operator - or similar method - for picking the variable to assign to?

问题描述

是否可以根据条件改变我要分配的变量?我遇到的问题是想这样做:

is it possible to differ the variable I'm assigning to depending on a condition? The issue I came across is wanting to do this:

(bEquipAsSecondary ? currentWeaponOffhand : currentWeaponMainhand) = weaponToSwitchTo;

代替

if (bEquipAsSecondary)
{
    currentWeaponOffhand = weaponToSwitchTo;
}
else
{
    currentWeaponMainhand = weaponToSwitchTo;
}

这将导致以下错误

错误CS0131分配的左侧必须是变量，属性或索引器

Error CS0131 The left-hand side of an assignment must be a variable, property or indexer

所以我想知道是否有一种方法可以减少使用的空间，并且-依我看，使它看起来更整洁?

So I was wondering if there was a way to do this to cut down on space used and - in my opinion - make it look a bit neater?

推荐答案

要使用三元运算符来选择要为其赋值的变量，可以使用

To use terinary operator for picking the variable to assign value to, you could make use of ref locals/returns.For example,

(bEquipAsSecondary ? ref currentWeaponOffhand : ref currentWeaponMainhand) = weaponToSwitchTo;

示例输出和代码

var currentWeaponOffhand = 4;
var currentWeaponMainhand = 5;
var weaponToSwitchTo = 7;

(bEquipAsSecondary ? ref currentWeaponOffhand : ref currentWeaponMainhand) = weaponToSwitchTo;
Console.WriteLine($"When bEquipAsSecondary={bEquipAsSecondary},currentWeaponOffhand={currentWeaponOffhand},currentWeaponMainhand={currentWeaponMainhand}");

输出

When bEquipAsSecondary=False,currentWeaponOffhand=4,currentWeaponMainhand=7
When bEquipAsSecondary=True,currentWeaponOffhand=7,currentWeaponMainhand=5

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