第一种：

复制代码 代码如下:

string[] Day = new string[] { "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" };

string week = Day[Convert.ToInt32(DateTime.Now.DayOfWeek.ToString("d"))].ToString();

lbDay.Text = week;

第二种：

复制代码 代码如下:

lbDay.Text = System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat.GetDayName(DateTime.Now.DayOfWeek);

第三种：

复制代码 代码如下:

public static string dt;

public static string week;

dt = DateTime.Today.DayOfWeek.ToString();

switch (dt)

{

case "Monday":

week = "星期一";

break;

case "Tuesday":

week = "星期二";

break;

case "Wednesday":

week = "星期三";

break;

case "Thursday":

week = "星期四";

break;

case "Friday":

week = "星期五";

break;

case "Saturday":

week = "星期六";

break;

case "Sunday":

week = "星期日";

break;

}

lbDay.Text = week;