"类型'System.Windows.Forms.TreeNodeCollection'没有定义构造函数"

Question

我有这个代码:

    private TreeNodeCollection treeCollection;

    public Client(TcpClient c)
    {
        this.tcpClient = c;
        this.tree = null;
        this.treeCollection = new TreeNodeCollection();
        this.treeCollection.Clear();
    }

    public void AddNode(string node)
    {
        this.treeCollection.Add(node);
    }

该this.treeCollection = new TreeNodeCollection();回报

The type 'System.Windows.Forms.TreeNodeCollection' has no constructors defined

如果我删除这一行,我得到的treeCollection从未被分配,并且将始终为null ...

Field 'Client.treeCollection' is never assigned to, and will always have its default value null

如何将treeCollection指定为新的TreeNodeCollection,以便我可以使用AddNode方法向其添加节点？

Answer 1

TreeNodeCollection有一个内部工厂或构造函数,因此它只能由TreeView控件使用.

但是......你不需要它.只需使用单个节点作为根节点即可.然后清除它的孩子

rootNode.Nodes.Clear();

或者,如果必须,只需创建一个

List<TreeNode>