TreeListNodeIterator.Current Property

Gets a node currently being processed by the TreeListNodeIterator object.

Namespace: DevExpress.Xpf.Grid

Assembly: DevExpress.Xpf.Grid.v20.1.dll

Declaration

public TreeListNode Current { get; }
Public ReadOnly Property Current As TreeListNode

Property Value

Type Description
TreeListNode

A TreeListNode object that is the node currently being processed.

Remarks

Use the TreeListNodeIterator.MoveNext method to iterate through the nodes. The currently processed node is returned by the Current property. Each time the TreeListNodeIterator.MoveNext method is called, the Node Iterator moves to the next node in the hierarchy and updates the Current property. If the current node is the last node, the TreeListNodeIterator.MoveNext method returns false.

To reset the Node Iterator to its initial state, call the TreeListNodeIterator.Reset method.

Examples

This example shows how to traverse through all visible nodes to expand those nodes that have more than four child nodes. Nodes that have less than four child nodes are collapsed.

<Window xmlns:dxg="clr-namespace:DevExpress.Xpf.Grid;assembly=DevExpress.Xpf.Grid.v11.1"  x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core"
        dx:ThemeManager.ThemeName="Office2007Black"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <dxg:GridControl Name="grid" Loaded="grid_Loaded">
            <dxg:GridControl.Columns>
                <dxg:GridColumn FieldName="Name"/>
                <dxg:GridColumn FieldName="Department"/>
                <dxg:GridColumn FieldName="Position"/>
            </dxg:GridControl.Columns>
            <dxg:GridControl.View>
                <dxg:TreeListView Name="treeListView" AutoWidth="True"
                                  KeyFieldName="ID" ParentFieldName="ParentID"/>
            </dxg:GridControl.View>
        </dxg:GridControl>
    </Grid>
</Window>
using System;
using System.Collections.Generic;

public class Employee {
    public int ID { get; set; }
    public int ParentID { get; set; }
    public string Name { get; set; }
    public string Position { get; set; }
    public string Department { get; set; }
}

public static class Stuff {
    public static List<Employee> GetStuff() {
        List<Employee> stuff = new List<Employee>();
        stuff.Add(new Employee() { ID = 1, ParentID = 0, Name = "Gregory S. Price", Department = "", Position = "President" });
        stuff.Add(new Employee() { ID = 2, ParentID = 1, Name = "Irma R. Marshall", Department = "Marketing", Position = "Vice President" });
        stuff.Add(new Employee() { ID = 3, ParentID = 1, Name = "John C. Powell", Department = "Operations", Position = "Vice President" });
        stuff.Add(new Employee() { ID = 4, ParentID = 1, Name = "Christian P. Laclair", Department = "Production", Position = "Vice President" });
        stuff.Add(new Employee() { ID = 5, ParentID = 1, Name = "Karen J. Kelly", Department = "Finance", Position = "Vice President" });

        stuff.Add(new Employee() { ID = 6, ParentID = 2, Name = "Brian C. Cowling", Department = "Marketing", Position = "Manager" });
        stuff.Add(new Employee() { ID = 7, ParentID = 2, Name = "Thomas C. Dawson", Department = "Marketing", Position = "Manager" });
        stuff.Add(new Employee() { ID = 8, ParentID = 2, Name = "Angel M. Wilson", Department = "Marketing", Position = "Manager" });
        stuff.Add(new Employee() { ID = 9, ParentID = 2, Name = "Bryan R. Henderson", Department = "Marketing", Position = "Manager" });

        stuff.Add(new Employee() { ID = 10, ParentID = 3, Name = "Harold S. Brandes", Department = "Operations", Position = "Manager" });
        stuff.Add(new Employee() { ID = 11, ParentID = 3, Name = "Michael S. Blevins", Department = "Operations", Position = "Manager" });
        stuff.Add(new Employee() { ID = 12, ParentID = 3, Name = "Jan K. Sisk", Department = "Operations", Position = "Manager" });
        stuff.Add(new Employee() { ID = 13, ParentID = 3, Name = "Sidney L. Holder", Department = "Operations", Position = "Manager" });

        stuff.Add(new Employee() { ID = 14, ParentID = 4, Name = "James L. Kelsey", Department = "Production", Position = "Manager" });
        stuff.Add(new Employee() { ID = 15, ParentID = 4, Name = "Howard M. Carpenter", Department = "Production", Position = "Manager" });
        stuff.Add(new Employee() { ID = 16, ParentID = 4, Name = "Jennifer T. Tapia", Department = "Production", Position = "Manager" });

        stuff.Add(new Employee() { ID = 17, ParentID = 5, Name = "Judith P. Underhill", Department = "Finance", Position = "Manager" });
        stuff.Add(new Employee() { ID = 18, ParentID = 5, Name = "Russell E. Belton", Department = "Finance", Position = "Manager" });
        return stuff;
    }
}
using System.Windows;
using DevExpress.Xpf.Grid;

namespace WpfApplication1 {
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window {
        public MainWindow() {
            InitializeComponent();
            grid.ItemsSource = Stuff.GetStuff();
        }

        private void SmartExpandNodes(int minChildCount) {
            TreeListNodeIterator nodeIterator = new TreeListNodeIterator(treeListView.Nodes, true);
            while (nodeIterator.MoveNext())
                nodeIterator.Current.IsExpanded = nodeIterator.Current.Nodes.Count >= minChildCount;
        }

        private void grid_Loaded(object sender, RoutedEventArgs e) {
            SmartExpandNodes(4);
        }
    }
}

Implements

System.Collections.Generic.IEnumerator<DevExpress.Xpf.Grid.TreeListNode>.Current
See Also