c# - 有没有办法使用三元运算符 - 或类似的方法 - 来选择要分配给的变量？

Question

是否可以根据条件改变我分配给的变量？我遇到的问题是想这样做:

(bEquipAsSecondary ? currentWeaponOffhand : currentWeaponMainhand) = weaponToSwitchTo;

代替

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

导致以下错误

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——在我看来——让它看起来更整洁一些？

Answer 1

要使用三元运算符来选择要为其赋值的变量，您可以使用 ref locals/returns .例如，

(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