Question

我在分配数据表时遇到问题，

这是数据，

Date                Location
23/07/2014 10:30    Near Highway
23/07/2014 11:30    Near Highway
23/07/2014 12:30    Near Highway
24/07/2014 01:00    From Texas 
24/07/2014 01:10    From Texas 
24/07/2014 01:20    From Texas 
24/07/2014 01:30    From Texas

我想分组并根据位置操纵开始时间，结束时间和持续时间。

Date        Start time      End time        Duration        Location
23/07/2014  10:30           12:30           2 hour 00 min   Near Highway
24/07/2014  01:00           01:30           0 hours30 min   From Texas

请帮我提出这个解决方案。提前谢谢。

Answer 1

我认为这应该有效：

    DataTable dt = new DataTable();
    dt.Columns.AddRange(new DataColumn[] 
    {
        new DataColumn("Date",typeof(DateTime)),
        new DataColumn("Location",typeof(string)),
    });
    dt.Rows.Add(DateTime.ParseExact("23/07/2014 10:30", "dd/MM/yyyy HH:mm", new CultureInfo("fr-fr")), "Near Highway");
    dt.Rows.Add(DateTime.ParseExact("23/07/2014 11:30", "dd/MM/yyyy HH:mm", new CultureInfo("fr-fr")), "Near Highway");
    dt.Rows.Add(DateTime.ParseExact("23/07/2014 12:30", "dd/MM/yyyy HH:mm", new CultureInfo("fr-fr")), "Near Highway");
    dt.Rows.Add(DateTime.ParseExact("24/07/2014 01:00", "dd/MM/yyyy HH:mm", new CultureInfo("fr-fr")), "From Texas");
    dt.Rows.Add(DateTime.ParseExact("24/07/2014 01:10", "dd/MM/yyyy HH:mm", new CultureInfo("fr-fr")), "From Texas");
    dt.Rows.Add(DateTime.ParseExact("24/07/2014 01:20", "dd/MM/yyyy HH:mm", new CultureInfo("fr-fr")), "From Texas");
    dt.Rows.Add(DateTime.ParseExact("24/07/2014 01:30", "dd/MM/yyyy HH:mm", new CultureInfo("fr-fr")), "From Texas");

    DataTable dt2 = new DataTable();
    dt2.Columns.AddRange(new DataColumn[] 
    {
        new DataColumn("Date"),
        new DataColumn("Start time"),
        new DataColumn("End time"),
        new DataColumn("Duration"),
        new DataColumn("Location")
    });
    var groups = dt.AsEnumerable().GroupBy(row => row["Location"]);
    foreach (var group in groups)
    {
        Console.WriteLine(group.Key);
        var groups2 = group.OrderBy(row => row["Date"]).GroupBy(row => Convert.ToDateTime(row["Date"]).ToString("dd/MM/yyyy"));
        foreach (var group2 in groups2)
        {
            Console.WriteLine("\t" + group2.Key);
            var list = group2.ToList();
            var startDate = Convert.ToDateTime(list[0]["Date"]);
            var endDate = Convert.ToDateTime(list[list.Count-1]["Date"]);
            TimeSpan ts = endDate-startDate;
            dt2.Rows.Add(group2.Key, startDate.ToString("HH:mm"), endDate.ToString("HH:mm"), ts.Hours + " hour " + ts.Minutes + " minutes", group.Key);
        }
    }

使用数据表按日期分组

1 个答案: