C# 语句异常处理语句

来源：互联网发布：mac 待机快捷键编辑：程序博客网时间：2024/06/13 21:22

1，try....catch...finally 不会找到逻辑错误，try里面放检测代码，，catch 捕捉到的异常，怎样处理finally不管有没有异常都会执行 try catch finally 3种组合

2，finally 很顽强 return后仍然会执行

3，

4，

excption的用法 C 语句异常处理语句 - 风未定 - 风未定的博客

exception是所有异常的父类

5，自定义异常错误

例子：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;  

namespace 自定义异常
{
    class Triangle
    {
        public int a;
        public int b;
        public int c;
       public int getCircumference()
        {
            if (a + b <=c || a + c <=b || b + c <=a) throw new Myexception();
            return a + b + c;
        }
       public void showInfo()
       {
           if (a + b <= c || a + c <= b || b + c <= a) throw new Myexception();
           Console.WriteLine("三边长为{0}，{1}，{2}", a, b, c);
       }
    }
    class Myexception:Exception
    {
        public Myexception(): base("InvalidTriangleException")
        {

        }
        //public Myexception(string message): base(message)
        //{        

        //}

        //public  Myexception (string message, Exception inner) : base(message, inner)
        //{

        //}
    }
    class Program
    {
        static void Main(string[] args)
        {
            Triangle t=new Triangle ();
            t.a = int.Parse(Console.ReadLine());
            t.b = int.Parse(Console.ReadLine());
            t.c = int.Parse(Console.ReadLine());
            try
            {
                Console.WriteLine(t.getCircumference());
                t.showInfo();
            }
            catch(Myexception me)
            {
                Console.WriteLine(me.Message + "异常！");
            }
            finally 
            {
            }
        }
    }
}

捕获异常的例子：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication44
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] a = new int[4];
            try
            {
                for (int i = 0; i < 5; i++)
                {
                    a[i] = int.Parse(Console.ReadLine());
                }
            }
            catch (Exception e1)  ///此处Exception 可以具体到子类
            {
                Console.WriteLine( e1.Message+"异常!");
            }
            finally { }
        }
    }
}

0 0