"星期"+DateTime.Now.DayOfWeek.ToString(("d"))

/// <summary>
/// 返回日期幾
/// </summary>
/// <returns></returns>
public static string DayOfWeek
{
get
{
switch (DateTime.Now.DayOfWeek.ToString("D"))
{
case "0":
return "星期日 ";
case "1":
return "星期一 ";
case "2":
return "星期二 ";
case "3":
return "星期三 ";
case "4":
return "星期四 ";
case "5":
return "星期五 ";
case "6":
return "星期六 ";
}
}
}