如题,例子:
2008-07-08 15:17:00
2008-06-13 09:43:00
2008-06-12 10:11:00
2008-12-20 14:02:00
2008-12-19 04:22:00
2008-05-18 20:00:00
比较后得到的结果是:
1.2008-12-20 14:02:00
2.2008-12-19 04:22:00
3.2008-07-08 15:17:00
2008-07-08 15:17:00
2008-06-13 09:43:00
2008-06-12 10:11:00
2008-12-20 14:02:00
2008-12-19 04:22:00
2008-05-18 20:00:00
比较后得到的结果是:
1.2008-12-20 14:02:00
2.2008-12-19 04:22:00
3.2008-07-08 15:17:00
list.Add(Convert.ToDateTime("2008-07-08 15:17:00"));
list.Add(Convert.ToDateTime("2008-06-13 09:43:00"));
list.Add(Convert.ToDateTime("2008-06-12 10:11:00"));
list.Add(Convert.ToDateTime("2008-12-20 14:02:00"));
list.Add(Convert.ToDateTime("2008-12-19 04:22:00"));
list.Add(Convert.ToDateTime("2008-05-18 20:00:00"));
list.Sort();最大3个list[5],list[4],list[3]
_Time.Add("2008-06-13 09:43:00", "");
_Time.Add("2008-06-12 10:11:00", "");
_Time.Add("2008-12-20 14:02:00", "");
_Time.Add("2008-12-19 04:22:00", "");
_Time.Add("2008-05-18 20:00:00", ""); for (int i = 0; i != 3; i++)
{ MessageBox.Show(_Time.Keys[_Time.Count-1-i].ToString());
}
ArrData.Add(dt1);
ArrData.Add(dt2);
ArrData.Add(dt3);
ArrData.Add(dt4);
ArrData.Add(dt5);
ArrData.Add(dt6);
ArrData.Sort();
ArrData[5],ArrData[4],ArrData[3]就是最大的三个
DataTable dt = new DataTable();
dt.Columns.Add("datestr");
AddRow(dt, "2008-12-08 15:18:00");
AddRow(dt, "2008-12-09 15:18:00");
AddRow(dt, "2008-12-10 15:18:00");
DataView dv = dt.DefaultView;
dv.Sort = "datestr desc";
for (int i = 0; i < dv.Count; i++)
{
Response.Write(dv[i][0].ToString());
}
dt.Dispose();
}
private void AddRow(DataTable dt, string vstr)
{
DataRow dr = dt.NewRow();
dr["datestr"] = vstr;
dt.Rows.Add(dr);
}
static void Main(string[] args)
{
DateTime[] Marks = new DateTime[6];
Marks[0] = DateTime.Parse("2008-12-25 17:07:14");
Marks[1] = DateTime.Parse("2008-12-25 17:08:14");
Marks[2] = DateTime.Parse("2008-12-25 17:06:14");
Marks[3] = DateTime.Parse("2008-12-25 17:05:14");
Marks[4] = DateTime.Parse("2008-12-25 17:04:14");
Marks[5] = DateTime.Parse("2008-12-25 17:02:14"); Array.Sort(Marks);
Array.Reverse(Marks); for (int x = 0; x < 3; x++)
{
Console.WriteLine(Marks[x]);
System.Threading.Thread.Sleep(1000);
}
Console.Read(); }
List<DateTime> list = new List<DateTime>();
DateTime[] times = new DateTime[] { Convert.ToDateTime("2008-05-18 20:00:00"), Convert.ToDateTime("2008-07-08 15:17:00"), Convert.ToDateTime("2008-06-13 09:43:00"),
Convert.ToDateTime("2008-06-12 10:11:00"), Convert.ToDateTime("2008-12-20 14:02:00"), Convert.ToDateTime("2008-12-19 04:22:00") }; list.AddRange(times);
list.Sort(new Comparison<DateTime>(delegate(DateTime x, DateTime y) { return y.CompareTo(x); }));
for (int i = 0; i < 3; i++)
{
MessageBox.Show(list[i].ToString());
}
结果保证是你想要的
DateTime[] times = new DateTime[] { Convert.ToDateTime("2008-05-18 20:00:00"), Convert.ToDateTime("2008-07-08 15:17:00"), Convert.ToDateTime("2008-06-13 09:43:00"), Convert.ToDateTime("2008-06-12 10:11:00"), Convert.ToDateTime("2008-12-20 14:02:00"), Convert.ToDateTime("2008-12-19 04:22:00") };
list.AddRange(times);
list.Sort((x, y) => y.CompareTo(x));
for (int i = 0; i < 3; i++)
{
MessageBox.Show(list[i].ToString());
}