按标题的要求将一个字符转换为整数。实现此功能,也有好几个方法
方法一:Convert.ToInt32(string);
![](https://images2017.cnblogs.com/blog/28036/201712/28036-20171208140902484-1257989340.jpg)
运行代码:
![](https://images2017.cnblogs.com/blog/28036/201712/28036-20171208141003077-842816681.jpg)
方法二: int.Parse(object):
![](https://images2017.cnblogs.com/blog/28036/201712/28036-20171208141529781-1208795381.jpg)
运行结果:
![](https://images2017.cnblogs.com/blog/28036/201712/28036-20171208141645796-1592074367.jpg)
这个字符正好是数字的字符串,使用int.Parse()是没有任何问题,但是如果这个是非数字的字符串呢?
![](https://images2017.cnblogs.com/blog/28036/201712/28036-20171208141931202-1293393653.jpg)
运行时,出现异常了:
![](https://images2017.cnblogs.com/blog/28036/201712/28036-20171208142135531-294999995.jpg)
方法三:Int.TryParse(obj)
此方法,可以很好解决方法的异常问题,如异常抛出时,它返回0:
![](https://images2017.cnblogs.com/blog/28036/201712/28036-20171208142435906-1969310260.jpg)
运行结果:
![](https://images2017.cnblogs.com/blog/28036/201712/28036-20171208142533265-240817418.jpg)
经过上面的各种方法或是运行的情况,我们是否有一个综合性的方法呢?也就是不管转换任何对象,均能正常运行!
下面Insus.NET尝试写一个扩展方法:
![](https://images2017.cnblogs.com/blog/28036/201712/28036-20171208143303890-832751512.jpg)
在程序中使用此扩展方法:
![](https://images2017.cnblogs.com/blog/28036/201712/28036-20171208144505874-657288166.jpg)
运行结果:
![](https://images2017.cnblogs.com/blog/28036/201712/28036-20171208144732421-673612504.jpg)