Question

This is a entity and i want to list all the children node for a given node in a generic function

    public static List<T> BuildTree<T>(List<T> list, T selectNode string keyPropName, string parentPropName, string levelPropName, int level = 0)
    {
        List<T> entity = new List<T>();

        foreach (T item in list)
        {


        }


        return entity;
    }

example of the entity structure

    protected long _coakey;
    protected long _parentkey;
    protected string _coacode;
    protected string _coacodeclient;
    protected string _coaname;
    protected int _coalevel;

    [DataMember]
    public long coakey
    {
        get { return _coakey; }
        set { _coakey = value; this.OnChnaged(); }
    }

    [DataMember]
    public long parentkey
    {
        get { return _parentkey; }
        set { _parentkey = value; this.OnChnaged(); }
    }

    [DataMember]
    public string coacode
    {
        get { return _coacode; }
        set { _coacode = value; this.OnChnaged(); }
    }

    [DataMember]
    public string coacodeclient
    {
        get { return _coacodeclient; }
        set { _coacodeclient = value; this.OnChnaged(); }
    }

    [DataMember]
    public string coaname
    {
        get { return _coaname; }
        set { _coaname = value; this.OnChnaged(); }
    }

    [DataMember]
    public int coalevel
    {
        get { return _coalevel; }
        set { _coalevel = value; this.OnChnaged(); }
    }

Answer 1

I have solved it my self hope it help you

    public static List<T> BuildTree<T>(List<T> list, T selectedNode, string keyPropName, string parentPropName, int endLevel = 0, int level = 0)
    {
        List<T> entity = new List<T>();
        Type type = typeof(T);
        PropertyInfo keyProp = type.GetProperty(keyPropName);
        string _selectedNodekey = keyProp.GetValue(selectedNode, null).ToString();

        PropertyInfo parentProp = type.GetProperty(parentPropName);
        foreach (T item in list)
        {

            string _key = keyProp.GetValue(item, null).ToString();
            string _parent = parentProp.GetValue(item, null).ToString();

            if (_selectedNodekey == _parent)
            {
                T obj = (T)Activator.CreateInstance(typeof(T));
                obj = item;
                entity.Add(obj);
                if (level == endLevel && level!=0) break;
                entity.AddRange(BuildTree<T>(list, obj, keyPropName, parentPropName, level + 1));
            }
        }


        return entity;

    }