1.string的Split方法的使用

这个例子就是通过制定的符号来将词组分开，Splite（分割的字符，分割的份数）

using System;
using System.Collections;

public class Test
{
    public static void Main()
    {
        string data = "Mike,McMillan,3000 W. Scenic,North Little Rock,AR,72118";
        string[] sdata;
        char[] delimiter=new char[]{','};
        sdata = data.Split(delimiter,4);
        foreach (string val in sdata)
        {
            Console.WriteLine(val);
        }
    }
}

2.string的Join用法，使用指定的连接符来对字符数组进行连接
using System;
using System.Collections;
using System.Linq;


public class Test
{
    public static void Main()
    {
        string [] sdata=new string[]{"i","want","to","do","it"};
        string data;
        data=String.Join(" ", sdata);
        Console.WriteLine(data);


    }
}


3.string的其他方法:
Euqal:用于比较两个字符串的大小，如果相等就返回True,如果不相等就放回false;

Compare To:比较两个字符串的大小，如果根据大小返回-1,0,1；


4.StartsWith和EndsWith的用法
这个函数用来判断字符当中是否是以指定字符开始或者结束的
using System;
using System.Collections;
using System.Linq;


public class Test
{
    public static void Main()
    {
       string []strs=new string[]{"dogs","cats","mat","apples","banana"};
        foreach (string val in strs)
        {
            if(val.EndsWith("s"))
                Console.WriteLine(val);
            if(val.StartsWith("a"))
                Console.WriteLine("**"+val);
        }


    }
}

5.字符的插入Insert,Remove
可以在指定位置插入一个字符，并返回处理过的字符串
Remove可以在指定位置删除指定长度的字符  
using System;
using System.Collections;
using System.Linq;


public class Test
{
    public static void Main()
    {
        string str = "你好，今天真好";
        str = str.Insert(2, "啊");
        Console.WriteLine(str);
        str = str.Remove(5, 1);
        Console.WriteLine(str);
    }
}

6.Replace方法
该方法是用于替换字符串中的字符
using System;
using System.Collections;
using System.Linq;


public class Test
{
    public static void Main()
    {
        string str = "你好啊，我已经完成了";
        str = str.Replace("好", "不");
        Console.WriteLine(str);


    }
}

7.文本对齐方式
using System;
using System.Collections;
using System.Linq;
public class Test
{
    public static void Main()
    {
        string s1 = "hello";
        string s2 = "world";
        string s3 = "goodbyte";
        Console.WriteLine(s1.PadLeft(10));  //用于左对齐(空格补齐左对齐)
        Console.WriteLine(s2.PadRight(10));  //用于右对齐


    }
}

8.字符串的大小写转换
using System;
using System.Collections;
using System.Linq;


public class Test
{
    public static void Main()
    {
        string s1 = "hello";
        s1 = s1.ToUpper();  //转化成大写字符
        Console.WriteLine(s1);


        string s2 = "HelL0";  //转换成小写
        s2 = s2.ToLower();
        Console.WriteLine(s2);


    }
}

9.去掉字符串中头部或则尾部的一些其他指定字符,Trim名为修剪，就是修饰用的
该方法只能去掉字符串的头部或则尾部中间的部分不能去掉
using System;
using System.Collections;
using System.Linq;


public class Test
{
    public static void Main()
    {
        string[] htmlComments = new string[]
        {
            "<!-- Start Page !!Number Function -->",
            "<!-- Get user name and password-->",
            "<!-- End Title page -->",
            "<!-- End script -->"
        };


        char[] commentChars=new char[]{'<','!','-','>'};
        for (int i = 0; i <=htmlComments.GetUpperBound(0); i++)
        {
            htmlComments[i] = htmlComments[i].Trim(commentChars); //将两端都去掉
            //htmlComments[i] = htmlComments[i].TrimEnd(commentChars);  //去掉尾部
            //htmlComments[i] = htmlComments[i].TrimStart(commentChars); //去掉头部
        }
        for (int i = 0; i <= htmlComments.GetUpperBound(0); i++)
        {
            Console.WriteLine(htmlComments[i]);
        }


    }
}