1.DateTime.Now.ToString("dddd",new System.Globalization.CultureInfo("zh-cn")); 

2.new string[] { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六", }[Convert.ToInt16(DateTime.Now.DayOfWeek.ToString("D"))];

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

4.

 

/// <summary>

/// 返回日期几

/// </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 ";

}

}

}