遍历字符串判断指定字符串是否存在

 

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

namespace ConsoleApplication1
{
    class Program
    {
        //截取字符串
        public string Remove_String(string strAreaID, string rootAreaID)
        {
            string strNewString = "";
            if (strAreaID == "")
            {
                strNewString = "";
            }
            else
            {
                bool bStrID = Split_String(strAreaID, rootAreaID);
                if (bStrID == false)
                {
                    strNewString = strAreaID.Remove(strAreaID.Length - 1);
                }
                else
                {
                    strNewString = rootAreaID;
                }

            }
            return strNewString;
        }


        public bool Split_String(string strAreaID, string rootAreaID)
        {
            bool bStrAreaID = false;
            StringBuilder sb1 = new StringBuilder();
            string strNewString = "";
            if (strAreaID == "")
            {
                strNewString = "";
            }
            else
            {
                string[] strArr = strAreaID.Split(',');
                if (strArr.Length > 0)
                {
                    for (int i = 0; i < strArr.Length - 1; i++)
                    {
                        if (strArr[i] == rootAreaID)
                        {
                            bStrAreaID = true;
                        }

                    }
                }
                else
                {
                    //为空了
                }
                strNewString = sb1.ToString();
            }

            return bStrAreaID;
        }


        static void Main(string[] args)
        {

            string StrAreaID = "sa,dd,d,a,as,e,rer,r,4,df";
            string RootAreaID = "a";
            Program program = new Program();
            //program.Split_String(StrAreaID, RootAreaID);
            string temp=program.Remove_String(StrAreaID, RootAreaID);
            Console.WriteLine(temp);
            Console.Read();

         

        }
    }
}

 

 

 http://shanggq2009.blog.163.com/blog/static/12342058220097315750409/