如问题标题一样,你是否知道要检查无理分类是否无效,而C#没有具体价值?
int? action = null;
var actionText = action != null && action != 0 ? action.ToString() : "-";
int? action = null;
var actionText = (action ?? 0) != 0 ? action.ToString() : "-";
不管怎样,你只能跳出<条码> ! = 无<>条/条码>的核对,而实际上不是短手;另一种选择(在这种情况下可能超高技能,但出于干净的代码而暗示这一点)就是为此制定一种专门的方法,这也可以提高你的代码的可读性,例如,
int? action = null;
var actionText = GetActionTextOrDefault(action);
.
.
.
public string GetActionTextOrDefault(int? action) {
return (action ?? 0) != 0 ? action.ToString() : "-";
}
What is the use of default keyword in C#? Is it introduced in C# 3.0 ?
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