ASP.NET中根据某个日期计算当天是星期几

比如2010-8-11

public string getWeek(object mydate)
{
string date = mydate.ToString();
string[] dt = date.Split('-');
int year = int.Parse(dt[0]);
int month = int.Parse(dt[1]);
int day = int.Parse(dt[2]);
DateTime newDate = new DateTime(year, month, day);

string week = "";
string weekstr = newDate.DayOfWeek.ToString();
switch (weekstr)
{
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;
}

return week;
}

下面代码是另外种思路

string CaculateWeekDay(int y,int m, int d)
{
if(m==1) {m=13;y--;}
if(m==2) {m=14;y--;}
int week=(d+2*m+3*(m+1)/5+y+y/4-y/100+y/400)%7+1;
string weekstr="";
switch(week)
{
case 1: weekstr="星期一"; break;
case 2: weekstr="星期二"; break;
case 3: weekstr="星期三"; break;
case 4: weekstr="星期四"; break;
case 5: weekstr="星期五"; break;
case 6: weekstr="星期六"; break;
case 7: weekstr="星期日"; break;
}

return weekstr;
}
private void Button1_Click(object sender, System.EventArgs e)
{
int year=int.Parse(TextBox1.Text);
int month=int.Parse(TextBox2.Text);
int day=int.Parse(TextBox3.Text);
Label1.Text=CaculateWeekDay(year,month,day);
}