C# 异常捕获

捕获异常

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

namespace ConsoleApp2
{
    class Test
    {
        int result;
        Test()
        {
            result = 0;
        }
        public void division(int num1,int num2)
        {
            try
            {
                result = num1 / num2;
            }
            catch(DivideByZeroException e)
            {
                Console.WriteLine("Exception caught:{0}", e);
            }
            finally
            {
                Console.WriteLine("Result:{0}", result);
            }
        }
        static void Main(string[] args)
        {
            Test t = new Test();
            t.division(23, 0);
            Console.ReadKey();
        }
    }

}

运行效果

自定义异常

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

namespace ConsoleApp2
{
    public class TempIsZeroException : ApplicationException
    {
        public TempIsZeroException(string message) : base(message)
        {
        }
    }
    public class Temperatrue
    {
        int temperature = 0;
        public void show()
        {
            if (temperature == 0)
            {
                throw (new TempIsZeroException("ZERO TEMPERATRUE FOUND"));
            }
            else
            {
                Console.WriteLine("Temperatrue:{0}", temperature);
            }
        }
    }
    class Test
    {
        int result;
        Test()
        {
            result = 0;
        }
        public void division(int num1,int num2)
        {
            try
            {
                result = num1 / num2;
            }
            catch(DivideByZeroException e)
            {
                Console.WriteLine("Exception caught:{0}", e);
            }
            finally
            {
                Console.WriteLine("Result:{0}", result);
            }
        }
        static void Main(string[] args)
        {
            Temperatrue t = new Temperatrue();

            try
            {
                t.show();
            }
            catch (TempIsZeroException e)
            {
                Console.WriteLine("TempIsZeroException:{0}", e.Message);
            }
            Console.ReadLine();
        }
    }

}

运行结果

抛出异常

catch(Exception e)
{
   ...
   Throw e
}