C#入门篇6-11：字符串操作 查找与替换

    #region 查找与替换
    public class C4
    {
        //查找
        public static void StrFind()
        {
            //目标字符串
            string str1 = "~awefawetwe1225233456567567 56yuethy56uhdfhtw wyw3234t#%#gdf drte rtr5 4sdfasg dsfasdf asghfasdfasdghsdfgdf";
            string str2 = "~";

            //报告指定的 System.String 在此实例内的最后一个匹配项的索引位置
            Console.WriteLine(str1.LastIndexOf(str2));

            if (str1.Contains(str2))
            {
                //巧妙
                ;
                ;//计数器，统计该字符串出现的次数

                while (n <= str1.LastIndexOf(str2))
                {
                    n = str1.IndexOf(str2, n) + ;
                    c++;
                }
                Console.WriteLine("字符" + str2 + "出现了：" + c.ToString());
            }
        }

        /// <summary>
        /// 替换
        /// </summary>
        /// <param name="strGoal">目标内容</param>
        /// <param name="strDisplaced">被替换的字符串</param>
        /// <param name="strReplace">替换的字符创</param>
        /// StrReplace("Hello World!","Hello","Hi")
        public static string StrReplace(string strGoal, string strDisplaced, string strReplace)
        {
            return strGoal.Replace(strDisplaced, strReplace);
        }
    }
    #endregion