Question

我将csv导入对象

 obj_cellelist = (from line in File.ReadAllLines(pathCelle)
                             let columns = line.Split(stringSeparators, StringSplitOptions.None)
                             select new obj_celle()
                             {    
                                 Cgi = columns[0],
                                 zonaNis = columns[0].Length > 8 ? int.Parse(columns[0].Substring(5, 3)) : -1,
                                 codice_Sarf = columns[0].Length > 11 ? int.Parse(columns[0].Substring(8, 4)) : -1,
                                 IDCella = columns[1],
                                 Operatore = columns[2],
                                 Void = columns[3],
                                 Via = columns[4].Replace("''", "'"),
                                 Comune = columns[5].Replace("ï¿½", "A'"),
                                 Provincia = columns[6],
                                 Regione = provincie.Keys.Contains(columns[6]) ? provincie[columns[6]] : "",
                                 Nazione = columns[7],
                                 Latitudine = decimal.Parse(columns[8].Replace('.', ',')) ,
                                 Longitudine = decimal.Parse(columns[9].Replace('.', ',')) ,
                                 Void1 = columns[10], 
                                 Azimuth = columns[11].Length > 0 ? int.Parse(columns[11]) : -1 }).ToList();

我需要通过Longitudine和Latitudine分组并获得所有不同的Azimuth。每个Latitudine，Longitudine最多有三个不同的方位角。其他值是相同的，除了cgi，我不需要。新对象应该包含 zonaNis，codice_Sarf，IDCella，算符，空隙，VIA，拱廊，省报，大区，Nazione，Latitudine，Longitudine，Void1，Azimuth1，Azimuth2，Azimuth3

示例：

861 ### 3OF034AA ### VODAFONE ###### STRADA TEST ### NOLA ### AR ### ITALY ### 43.74619685 ### 11.71866206 ###### 110

862 ### 3OF034AA ### VODAFONE ###### STRADA TEST ### NOLA ### AR ### ITALY ### 43.74619685 ### 11.71866206 ###### 240

864 ### 3OF034AA ### VODAFONE ###### STRADA TEST ### NOLA ### AR ### ITALY ### 43.74619685 ### 11.71866206 ###### 110

865 ### 3OF034AA ### VODAFONE ###### STRADA TEST ### NOLA ### AR ### ITALY ### 43.74619685 ### 11.71866206 ###### 240

867 ### 3OF034AA ### VODAFONE ###### STRADA TEST ### NOLA ### AR ### ITALY ### 43.74619685 ### 11.71866206 ###### 110

868 ### 3OF034AA ### VODAFONE ###### STRADA TEST ### NOLA ### AR ### ITALY ### 43.74619685 ### 11.71866206 ###### 240

对象输出应

3OF034AA ### VODAFONE ###### STRADA TEST ### NOLA ### AR ### ITALY ### 43.74619685 ### 11.71866206 ###### 110 ### 240

Answer 1

obj_cellelist
   .GroupBy(p => new { Lat = p.Latitudine, Long = p.Longitudine })
   .Select(g => new { place = g.Key, azimuths = g.Select(a => a.Azimuth).Disctinct() })
   .ToList();

这将为您提供具有两个属性的对象列表。第一个属性是obj_celle类型，另一个属性是不同方位角列表。

Linq Group by Row into Column

1 个答案: