从GTK# NodeView获取选定列

using Gtk;

public class NodeViewExample : Window
{
    private NodeView nodeView;
    private ListStore store;

    public NodeViewExample() : base("NodeView Example")
    {
        SetDefaultSize(300, 200);

        // 创建数据模型
        store = new ListStore(typeof(string), typeof(string), typeof(string));
        store.AppendValues("John", "Doe", "john@example.com");
        store.AppendValues("Jane", "Smith", "jane@example.com");

        // 创建NodeView控件
        nodeView = new NodeView(store);
        nodeView.AppendColumn("First Name", new CellRendererText(), "text", 0);
        nodeView.AppendColumn("Last Name", new CellRendererText(), "text", 1);
        nodeView.AppendColumn("Email", new CellRendererText(), "text", 2);

        // 设置选择模式为多选
        nodeView.Selection.Mode = SelectionMode.Multiple;

        // 添加NodeView到窗口
        Add(nodeView);

        // 处理选中事件
        nodeView.Selection.Changed += OnSelectionChanged;

        ShowAll();
    }

    private void OnSelectionChanged(object sender, EventArgs e)
    {
        TreeModel model;
        TreeIter iter;

        // 获取选中的行
        if (nodeView.Selection.GetSelected(out model, out iter))
        {
            // 获取选中行的Node对象
            var node = (Node)model.GetValue(iter, 0);

            // 获取选中行的子节点
            var child = node.GetChild(0);

            // 获取选中行的指定列的值
            var columnValue = node.GetChildValue(child, 1);

            // 在控制台输出选中行的指定列的值
            Console.WriteLine(columnValue);
        }
    }

    public static void Main()
    {
        Application.Init();
        new NodeViewExample();
        Application.Run();
    }
}