比较两个字符串的最长的相同字符串 及其位置和百分比

  /// <summary>        ///         /// </summary>        /// <param name="DataKey"></param>        /// <param name="DataSoure"></param>        /// <param name="minPercentage"></param>        /// <param name="maxPercentage"></param>        /// <param name="minstarLoca"></param>        /// <param name="maxstarLoca"></param>        /// <returns></returns>        public static string getSomeString(string DataKey                                          ,string DataSoure                                          ,out string minPercentage                                          ,out string maxPercentage                                          ,out int minstarLoca                                          ,out int maxstarLoca)         {            string strReturn = "";            int strBeginStar = 0,strlength=1,maxlength=0;            bool IsGoOn=true;            string strTemp ="";            //使用短的区匹配长的 加快速度            string strKey, strSoure;            strKey = DataKey.Length >= DataSoure.Length ? DataSoure : DataKey;            strSoure = DataKey.Length > DataSoure.Length ? DataKey : DataSoure;            minstarLoca = 0; maxstarLoca = 0; minPercentage = "0"; maxPercentage = "0";            while (maxlength <= strKey.Length)             {                strTemp = strKey.Substring(strBeginStar, strlength);                while (strSoure.IndexOf(strTemp) > -1 && maxlength <= strKey.Length)                {                    minstarLoca = strBeginStar;                    maxstarLoca = strSoure.IndexOf(strTemp);                    strReturn = strTemp;                    strlength = strlength + 1;                    maxlength = strlength + strBeginStar;                    if (maxlength <= strKey.Length)                    {                        strTemp = strKey.Substring(strBeginStar, strlength);                    }                }                strBeginStar = strBeginStar + 1;                maxlength = strlength + strBeginStar;                  }            minPercentage = ((double)strReturn.Length * 100 / strSoure.Length).ToString();            maxPercentage = ((double)strReturn.Length * 100 / strKey.Length).ToString();            return strReturn;        }

        protected void Button1_Click(object sender, EventArgs e)        {            string strMax,strMin;            int minstar,maxstar;            string str = getSomeString(TextBox1.Text.Trim(), TextBox2.Text.Trim(), out strMin, out strMax, out minstar, out maxstar);            Label1.Text = "最大百分比为：" + strMax + "最小百分比为：" + strMin + "在小字符串中开始位置：" + minstar.ToString() + "在大字符串中开始位置：" + maxstar.ToString()+ "<br/>匹配字符串为：" + str;        }