Class structure for the proposed data and its containers? [closed]_问答_开发者

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First I would like to wish a happy new year to everyone that may read this :)

I am having trouble on how to make a container for some data that I am importing into my application, and I am not sure on how to explain this very well and my english is not really a that good so I hope you can bear with my mistake and help me with some guidance.

Currently with a foreach I am importing the follow fields from the data I receive: guid, itemid, name, owner(optional, can be null), zoneid, titleid, subid, heading, x, y, z, typeA, typeB, typeC

From the above fields I need to store a Waypoint list of all coords a given item has moved to BUT for each guid I have a new list of waypoints.

And from the waypoint list the first entry is also my initial item start location which would be my item initial position (if you notice i have a separate list for it which I was not sure would be better or not) not all items have a waypoint list but all items have the first position.

So the first idea I came with to store this data was a list with a class with 2 inner classes with their list:

public List<ItemList> myList = new List<ItemList>();
public class ItemList
{
    public int GuID { get; set; }
    public int ItemID { get; set; }
    public string Name { get; set; }
    public int TitleID { get; set; }
    public itemType Status { get; set; }

    public class Waypoint
    {
        public int Zone { get; set; }
        public int SubID { get; set; }
        public int Heading { get; set; }
        public float PosX { get; set; }
        public float PosY { get; set; }
        public float PosZ { get; set; }
    }
    public List<Waypoint> Routes = new List<Waypoint>();
}

So here is an example of how I would add a new waypoint to a GUID that exists in the list

                    ItemList myItem = myList.Find(item => item.GuID == GUID);
                    if (myItem != null)
                    {
                        int lastDistance = 3;
                        ItemList.Waypoint nextWaypoint;

                            // Add new Coordinates to the given GUID
                            ItemList.Waypoint lastWaypoint = myItem.Routes.LastOrDefault();
                            if (lastWaypoint != null)
                            {
                                lastDistance = getDistance(posX, posY, posZ, lastWaypoint.PosX, lastWaypoint.PosY, lastWaypoint.PosZ);
                                if (lastDistance > 2)
                                {
                                    nextWaypoint = new ItemList.Waypoint();
                                    nextWaypoint.SubID = subID;
                                    nextWaypoint.Zone = zone;
                                    nextWaypoint.Heading = convertHeading(heading);
                                    nextWaypoint.PosX = posX;
                                    nextWaypoint.PosY = posY;
                                    nextWaypoint.PosZ = posZ;
                                    nextWaypoint.Rest = rest;
                                    myItem.waypoint.Add(nextWaypoint);
                                }
                            }
                    }

Then to register a new item I would take advantage of the itemExist above so I won't register the same GUID again:

                    ItemList newItem = new ItemList();
                    newItem.GuID = GUID;
                    newItem.ItemID = itemID;
                    newItem.Name = name;
                    newItem.Status = status;
                    newItem.TitleID = titleID;

                    // Item location
                    ItemList.Location itemLocation = new ItemList.Location();
                    itemLocation.SubID = subID;
                    itemLocation.Zone= zone;
                    itemLocation.Heading = convertHeading(heading);
                    itemLocation.PosX = posX;
                    itemLocation.PosY = posY;
                    itemLocation.PosZ = posZ;
                    newItem.position.Add(itemLocation);
                    myList.Add(newItem);

Could you help me with advices on how my class structure and lists should look like ?

Are there better ways to interate with the lists to get lastWaypoint of a GUID or verify wether an item exist or not ?

What else would you advise me in general ?

PS: If you have any questions or if there is something I missed to post please let me know and I will update it.

UPDATE: have changed t开发者_运维百科he above to reflect what I currently have and if anyone else still have advices I would like to hear.

A few notes (after two glasses of champaign…):

You don't state any requirements for the data structures and their usage. Your design looks quite reasonable.
You can use the FirstOrDefault() method to check for existence (i.e. the return value != null) of an item and retrieve it from the list in one operation.
Your code has an apparent bug: there's no nextWaypoint != null check before the new waypoint is added and it need not exist. Likewise there shall be no lastWaypoint != null check necessary as the list won't contain any null values.
I'd recommend introducing constructors to your classes accepting values for the mandatory properties.
There's no clear point of having both a GUID and an integer ID identifying the ItemList — the search condition is then just overspecified.
The commonly used coding standard states that property names shall begin with an upper case letter (posX ⇒ PosX etc.).
The waypoint and position lists should be properties as well; having a getter only and backed with a readonly field.