C#字符串

创建

    using System;
    namespace StringApplication
    {
        class Program
        {
            static void Main(string[] args)
            {
                //字符串，字符串连接
                string fname, lname;
                fname = "Rowan";
                lname = "Atkinson";
                string fullname = fname + lname;
                Console.WriteLine("Full Name: {0}", fullname);
    
                //通过使用 string 构造函数
                char[] letters = { 'H', 'e', 'l', 'l','o' };
                string greetings = new string(letters);
                Console.WriteLine("Greetings: {0}", greetings);
    
                //方法返回字符串
                string[] sarray = { "Hello", "From", "Tutorials", "Point" };
                string message = String.Join(" ", sarray);
                Console.WriteLine("Message: {0}", message);
    
                //用于转化值的格式化方法
                DateTime waiting = new DateTime(2012, 10, 10, 17, 58, 1);
                string chat = String.Format("Message sent at {0:t} on {0:D}", waiting);
                Console.WriteLine("Message: {0}", chat);
    
                Console.ReadKey() ;
            }
        }
    }

编译结果：

    Full Name: RowanAtkinson
    Greetings: Hello
    Message: Hello From Tutorials Point
    Message: Message sent at 17:58 on Wednesday, 10 October 2012

属性

方法

    string s1 = "00wqw12";
    string s2 = "0012";
    Console.WriteLine(string.Compare(s1, s2));  //1第一个不相同的字符大小
    Console.WriteLine(string.Concat(s1,s2));    //连接
    Console.WriteLine(string.Copy(s1));         //copy
    Console.WriteLine(string.Equals(s1,s2));    //相等
    Console.WriteLine(string.IsNullOrEmpty(s1));//为空
    Console.WriteLine(string.IsNullOrWhiteSpace(s1));//空或空格
    Console.WriteLine(string.Join(",", new string[] { s1, s2 }));//用,连接

    Console.WriteLine(s1.Clone());              //clone
    Console.WriteLine(s1.Contains(s2));         //包含
    Console.WriteLine(s1.Count());              //数量
    Console.WriteLine(s1.Insert(1,s2));         //插入
    Console.WriteLine(s1.Length);
    Console.WriteLine(s1.PadLeft(7,','));       //从左填充‘,’,使长度达到7
    Console.WriteLine(s1.Remove(1));            //从1开始删除后面所有
    Console.WriteLine(s1.Remove(1,2));          //从1开始删除两个字符
    Console.WriteLine(s1.Replace('0','_'));     //0字符替换为_字符
    Console.WriteLine(s1.Replace("0","_"));     //0字符串替换为_字符串
    Console.WriteLine(s1.Reverse());            //反转字符串
    Console.WriteLine(s1.Split(','));           //分割字符串成一个字符数组
    Console.WriteLine(s1.Substring(2,3));       //从2开始截取三个字符
    Console.WriteLine(s1.ToCharArray());        //字符串转为字符数组
    Console.WriteLine(s1.ToLower());            //小写
    Console.WriteLine(s1.IndexOf('0'));         //第一个字符0的位置
    Console.WriteLine(s1.IndexOf("00"));        //第一个字符串
    Console.WriteLine(s1.LastIndexOf('0'));     //最后一个