c# - 无法比较字符串 > 字符串

Question

我正在尝试做这样的事情:

  // some code...

  string a="aa";
  string b="bb";
  // ...
  if(b>a)    // suppose to be true
   {
     // do somthing
   }

但是我得到了编译错误:

Operator '>' cannot be applied to operands of type 'string' and 'string'.

那么最好的方法是什么？

Answer 1

使用 CompareTo() 方法代替。

if(b.CompareTo(a) > 0)

Compares two specified String objects and returns an integer that indicates their relative position in the sort order.

这个方法；

• if b is greater than a or a is null, it returns greater than zero.
• if b is less than a, it returns less than zero.
• if b has the same position in the sort order as a, it returns 0.

检查这个 DEMO .