Question

我有两个ATTRIBUT / OBJECT的列表。第一个IS AN INT-ARRAY用于两个ID。

我想在LIST中添加一个新的OBJECT，只有当值 12 和 21 （仅组合）不存在于Ids-Array中时孔列表。 //如果只找到一个ID就可以了 - 只有两个ID的组合需要跳转到ELSE-Case。：）

* 12和21将在以后变量，因此没有静态值

我不知道为什么，但这不起作用......

if（Id！= Destination.Id＆amp;＆amp; ！（ThisDistances.Exists（x =＆gt; x.Ids.Contains（12））＆amp;＆amp; ThisDistances.Exists（x =＆gt; x .Ids.Contains（21）））） {...}

public class DistanceData
{
    public int[] Ids;
    public int Distance;
}

protected void MakeDistances(int Id, double GeoLat, double GeoLon, int Limit = 100)
{
    int i = 0;
    List<DistanceData> ThisDistances = new List<DistanceData>();
    foreach (var Destination in Destinations)
    {
        if (Id != Destination.Id && !(ThisDistances.Exists(x => x.Ids.Contains(12)) && ThisDistances.Exists(x => x.Ids.Contains(21))))
        {
            ThisDistances.Add(new DistanceData()
            {
                Ids = new int[2] { Id, Destination.Id },
                Distance = (int)Math.Round(6378388 * Math.Acos(Math.Sin(GeoLat) * Math.Sin(Destination.GeoLat) + Math.Cos(GeoLat) * Math.Cos(Destination.GeoLat) * Math.Cos(Destination.GeoLon - GeoLon)), 0, MidpointRounding.AwayFromZero)
            });
            if (++i > 10) break;
        }
    }
    ThisDistances = ThisDistances.OrderBy(x => x.Distance).Take(Limit).ToList();
    foreach (var ThisDistance in ThisDistances)
    {
        Response.Write("<i><b>" + ThisDistance.Distance + "</b> (" + ThisDistance.Ids[0] + "," + ThisDistance.Ids[1] + ")</i><br />");
    }
}

如何检查两个 ID是否不在ObjectList的ID-Array中？

Answer 1

试试这个：

foreach (var Destination in Destinations)
{
    if (Id != Destination.Id && (ThisDistances.Exists(x => x.Ids.Contains(12) && x.Ids.Contains(21)) == false))
    {
        ThisDistances.Add(new DistanceData()
        {
            Ids = new int[2] { Id, Destination.Id },
            Distance = (int)Math.Round(6378388 * Math.Acos(Math.Sin(GeoLat) * Math.Sin(Destination.GeoLat) + Math.Cos(GeoLat) * Math.Cos(Destination.GeoLat) * Math.Cos(Destination.GeoLon - GeoLon)), 0, MidpointRounding.AwayFromZero)
        });
        if (++i > 10) break;
    }
}

Array-List不包含

1 个答案: