using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace 去除空格
{
    class Program
    {
        static void Main(string[] args)
        {
            string BugsBug = "       my name is Bugs Bug         ";
            string test1BugsBug = "  this is  Bugs Bug  test 1   ";
            string test2BugsBug = "   this   is   Bugs Bug       test    2    ";
            string test3BugsBug = "    this    is     Bugs Bug          test       3     ";
            string test4BugsBug = "     this     is       Bugs Bug             test          4      ";
            string test5BugsBug = "      this      is          Bugs Bug               test            5       ";
            string test6BugsBug = "       this       is             Bugs Bug                test               6        ";
            string test7BugsBug = "        this        is               Bugs Bug                  test                 7         ";
            string test8BugsBug = "       this       is             Bugs Bug                test               8        ";
            string test9BugsBug = "      this      is          Bugs Bug               test            9       ";

            //1.
            Console.WriteLine("Original:     " + "'" + BugsBug + "'");
            Console.WriteLine("Trim():       " + "'" + BugsBug.Trim() + "'");
            Console.WriteLine();
            //2.
            Console.WriteLine("Original:     " + "'" + test1BugsBug + "'");
            Console.WriteLine("TrimStart():  " + "'" + test1BugsBug.TrimStart() + "'");
            Console.WriteLine();
            //3.
            Console.WriteLine("Original:     " + "'" + test2BugsBug + "'");
            Console.WriteLine("TrimEnd():    " + "'" + test2BugsBug.TrimEnd() + "'");
            Console.WriteLine();
           
            //4.
            //参考源：http://blog.csdn.net/dyufei/article/details/5420407 感谢原作者
            //ASCII表:http://www.asciima.com/
            Console.WriteLine("Original:     " + "'" + test3BugsBug + "'");
            //在~里面获取每一个characters
            CharEnumerator ce = test3BugsBug.GetEnumerator();
            string test3BugsBugcopy = string.Empty;
            while (ce.MoveNext())
            {
                byte[] array = new byte[1];           //此方法返回byte[];
                array = System.Text.ASCIIEncoding.ASCII.GetBytes(ce.Current.ToString());
                if (array[0] != 32)
                    test3BugsBugcopy += ce.Current.ToString();
            }
            Console.WriteLine("ASCII:        " + "'" + test3BugsBugcopy + "'");
            Console.WriteLine();
            
            //5.
            Console.WriteLine("Original:     " + "'" + test4BugsBug + "'");
            string test4BugsBugcopy = string.Empty;
            if (test4BugsBug.IndexOf(" ") > -1)//预防非法替换
                test4BugsBugcopy = test4BugsBug.Replace(" ", string.Empty);
            Console.WriteLine("Replace():    " + "'" + test4BugsBugcopy + "'");
            Console.WriteLine();
           
            //6.
            Console.WriteLine("Original:     " + "'" + test5BugsBug + "'");
            string test5BugsBugcopy = string.Empty;
            foreach (char item in test5BugsBug.ToCharArray())
            {                                  //可加参数arg...
                if (item!=Convert.ToChar(" "))
                {
                    test5BugsBugcopy += item;
                }
            }
            Console.WriteLine("ToCharArray():" + "'" + test5BugsBugcopy + "'");
            Console.WriteLine();
           
            //7.
            //Split()参考：http://msdn.microsoft.com/en-us/library/y7h14879.aspx
            string test6BugsBugcopy=string.Empty;
            Console.WriteLine("Original:     " + "'" + test6BugsBug + "'");//以" "分割,并且不保留" "元素.
            string[] array1 = test6BugsBug.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
            test6BugsBugcopy = string.Join(string.Empty, array1);//拼接...也可以用" "拼接,相当于只保留一个空格.
            Console.WriteLine("Split&&Join():" + "'" + test6BugsBugcopy + "'");
            Console.WriteLine();

            //8.
            //全角半角参考:http://www.cnblogs.com/dudu/archive/2011/09/17/2179423.html
            Console.WriteLine("Original:     " + "'" + test7BugsBug + "'");
            test7BugsBug = System.Text.RegularExpressions.Regex.Replace(test7BugsBug, @"\s*", string.Empty);
            Console.WriteLine("Regex:        " + "'" + test7BugsBug + "'");
            Console.WriteLine();

            //9.
            //Append()参考：http://msdn.microsoft.com/zh-cn/library/ds86a594.aspx
            Console.WriteLine("Original:     " + "'" + test8BugsBug + "'");
            string[] array3 = test8BugsBug.Split(' ');//char..拆分
            StringBuilder sb = new StringBuilder();
            foreach (var item in array3)
            {
                if (item.Trim() != string.Empty)
                {
                    sb.Append(item);//组合...
                    //sb.Append(" ");以一个空格为分割
                }
            }
            Console.WriteLine("Substring:    " + "'" + sb + "'");
            Console.WriteLine();

            //9.


            Console.ReadKey();
        }
    }
}