获取当前时间所处星期

 private string  ValidateDataTime()
    {
       string time= System.DateTime.Today.DayOfWeek.ToString();
       string ConvertTime="";
       switch (time)
       {
           case "Friday": ConvertTime = "星期五"; break;
           case "Monday": ConvertTime = "星期一"; break;
           case "Tuesday": ConvertTime = "星期二"; break;
           case "Wednesday": ConvertTime = "星期三"; break;
           case "Thursday": ConvertTime = "星期四"; break;
           case "Saturday": ConvertTime = "星期六"; break;
           case "Sunday": ConvertTime = "星期天"; break;
       }
       return ConvertTime;
    }

然后调用这个方法就OK了。