C#之抛异常

Posted 2022-01-30 talentzemin

using System;

namespace Demo

    class Program
    
        static void Main(string[] args)
        
            try
            
                BLLLayer();
            
            catch (Exception ex)
            
                Console.WriteLine(ex.StackTrace);
                Console.WriteLine("===================================");
                Console.WriteLine(ex.ToString());
            
            Console.ReadKey();
        

        static void BLLLayer()
        
            try
            
                DAOLayer();
            
            catch (Exception ex)
            
                //throw;  //可溯源到DAO
                //throw ex;  //可溯源终点就是这里
                //throw new Exception("BLL层异常");       //可溯源终点就是这里，抛出新的异常，吞并原来的异常
                //throw new Exception("BLL层异常", ex); //可溯源终点就是这里，抛出新的异常，带着原来的异常
            
        

        static void DAOLayer()
        
            try
            
                throw new Exception("DAO层异常");
            
            catch
            
                throw;