根据字符串截取周的信息转换为这周的最后一天
String tempSN ="A201303001";

怎么根据这个字符串截取03,知道是一年的第3周
让后转换成这周的最后一天
转换完的效果是2013-01-20
------解决方案--------------------

		String tempSN = "A201303001";

		int year = int.Parse(tempSN.Substring(1, 4));

		int week = int.Parse(tempSN.Substring(5, 2));

		DateTime dt = new DateTime(year, 1, 1);

		dt = dt.AddDays(7 * (week - 1));

		while (dt.DayOfWeek != DayOfWeek.Sunday)

			dt = dt.AddDays(1);

		Response.Write(dt.ToString());

------解决方案--------------------
            String tempSN = "A201303001";
            int year = Convert.ToInt32(tempSN.Substring(1, 4));
            int week = Convert.ToInt32(tempSN.Substring(5, 2));
            DateTime firstDay = new DateTime(year, 1, 1);
            DateTime result = firstDay.AddDays(7 - Convert.ToInt32(firstDay.DayOfWeek) + (week - 1) * 7);
            Console.WriteLine(result);