C# 正则表达式，Delegates 与 Exception

正则表达式用来处理复杂的String

using System;
using System.Text;
using System.Text.RegularExpressions;
public class Tester
{
    static void Main()
    {
        string s1 = "One,Two,Three Liberty Associates, Inc.";
        Regex theRegex = new Regex(" |, |,");
        StringBuilder sBuilder = new StringBuilder(); int id = 1;
        foreach (string subString in theRegex.Split(s1))
        {
            sBuilder.AppendFormat("{0}: {1}
", id++, subString);
        }
        Console.WriteLine("{0}", sBuilder);
    }
}

delegates 类似C++的函数指针

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

namespace ConsoleApplication8
{
    delegate int Sample(int x, int y);  //定义delegate方法
    class Class2
    {
        public int method(int x, int y)
        { return x * y; }
    }
    class Class1
    {
        static void Main(string[] args)
        {
            Class2 instance = new Class2();
            Sample mySample                         // 调用delegate的构造方法
                   = new Sample(instance.method);   // 生成mySample实体
            int result = mySample(2, 3);
            Console.WriteLine(result);          // 输出结果 6
        }
    }
}

Exceptions

throw exception后，throw后的代码不执行

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

namespace ConsoleApplication8
{
    public class Test
    {
     public static void Main()
     {
        Console.WriteLine("Enter Main...");
       Test t = new Test();
       t.Func1();
       Console.WriteLine("Exit Main...");   //未执行
     }
     public void Func1()
     {
         Console.WriteLine("Enter Func1...");
         Func2();
         Console.WriteLine("Exit Func1...");  //未执行
     }
        public void Func2()
    {
        Console.WriteLine("Enter Func2...");
         throw new System.ApplicationException();   //抛出 
         Console.WriteLine("Exit Func2...");        // 未执行
     }
    }
    
}

只在主函数中 catch 异常。