c# 标点问题
  Session["ESI_EMPNO"] = Session["ESI_EMPNO"] + l_dtDaTable2.Rows[i]["ESI_EMPNO"].ToString();

得到的结果是“9009903090629063”

我想得到“‘9009’，‘9030’，‘9062’，‘9063’”

怎么改？
------解决方案--------------------
%4==0   
+","
TrimEnd(',')
------解决方案--------------------
string strNum="90099030906290631";
            string res ="";
            int i = 0;
            while (i+4 < strNum.Length)
            {
                res += strNum.Substring(i, 4) + ",";
                i = i + 4;
            }
------解决方案--------------------

string text = @"9009903090629063";

            List<string> list = Regex.Split(text,@"(?<=\G\w{4})(?!$)").ToList();

            /*

             * 		[0]	"9009"	string

		            [1]	"9030"	string

		            [2]	"9062"	string

		            [3]	"9063"	string



             */

------解决方案--------------------

引用:

Quote: 引用:

string text = @"9009903090629063";

            List<string> list = Regex.Split(text,@"(?<=\G\w{4})(?!$)").ToList();

            /*

             * 		[0]	"9009"	string

		            [1]	"9030"	string

		            [2]	"9062"	string

		            [3]	"9063"	string



         &nbs