private string Dtime()  
    {  
        byte tempB = (byte)DateTime.Now.DayOfWeek;  
        byte dayByte = (byte)DayOfWeek.Wednesday;  
        DateTime wednesdayNow = DateTime.Now.AddDays(dayByte - tempB);//本星期三  
        DateTime returnTime = new DateTime ();  
        if (DateTime.Now.DayOfWeek < wednesdayNow.DayOfWeek)  
        {  
            //当前星期小于本星期三  获取本周星期三  
           returnTime =  new DateTime(wednesdayNow.Year, wednesdayNow.Month, wednesdayNow.Day, 10, 0, 0);  
        }  
        else  
        {  
            //当前星期大于本星期三  获取下周星期三  
            DateTime nextWednesday = wednesdayNow.AddDays(7);//下周三  
            returnTime = new DateTime(nextWednesday.Year, nextWednesday.Month, nextWednesday.Day, 10, 0, 0);  
        }  
        return returnTime.ToString()  


//csharp/7827