c# 异常处理

嵌套

异常嵌套可一起检查多个异常,其中一环出现异常，便停止排查余下异常

  public class TryCatch
    {
        public void Test1(int a )
        {
            try
            {
                int i = 1 / a;

                Console.WriteLine(i);
                try
                {
                    int j = i + 1;        //异常嵌套
                    Console.WriteLine(j);
                }
                catch (IndexOutOfRangeException e)
                {
                    Console.WriteLine(e.Message);
                    Console.WriteLine(e.StackTrace);


                }
            }
            catch(Exception e )   //当不知道异常种类时用Exception
            {
                Console.WriteLine(e.Message);
            }
            finally
            {
                Console.WriteLine("结果");
            }

        }
    }

多重异常处理

Argument三个异常为参数相关，需先定义一下

    public class Exceptions
    {
        public static void Text1(string name,int age,string sex)
        {
            if (string .IsNullOrWhiteSpace(name))
            {
                throw new ArgumentNullException("name"); 
            }
            if (sex!="boy" &&sex!= "girl")
            {
                throw new ArgumentException("sex");
            }
            if (age>=150 || age <=0)
            {
                throw new ArgumentOutOfRangeException("age");
            }
            Console.WriteLine(name + age + sex);
        }
}

  
            try
            {
                Exceptions.Text1("tt", 23, "boy");
                Console.WriteLine("无异常");
            }

            catch (ArgumentNullException e)
            {
                Console.WriteLine(e.Message);
                Console.WriteLine(e.StackTrace);
            }
            catch (ArgumentOutOfRangeException e)
            {
                Console.WriteLine(e.Message);
                Console.WriteLine(e.StackTrace);
            }
            catch (ArgumentException e)
            {
                Console.WriteLine(e.Message);
                Console.WriteLine(e.StackTrace);
            }