This example shows how to create a self-referential data structure and display it in the TreeListView.
To display this tree structure, your data source should include the following fields of the same data type:
- Key Field - This field should contain unique values used to identify nodes. Assign its name to the TreeListView.KeyFieldName property.
- Parent Field - This field should contain values that indicate parent nodes. Assign its name to the TreeListView.ParentFieldName property.
Set the TreeListView.TreeDerivationMode property to Selfreference to enable the self-referential mode.
Files to Review
- Employees.cs (VB: Employees.vb)
- MainWindow.xaml (VB: MainWindow.xaml)
Documentation
- Bind to Self-Referential Data Structure
- Display Hierarchical Data
- TreeListView.KeyFieldName
- TreeListView.ParentFieldName
More Examples
- WPF Tree List - Use the Child Nodes Selector to Create a Hierarchical Data Structure
- WPF Tree List - Implement the Child Nodes Path
- WPF Tree List - Use the Hierarchical Data Template to Build a Tree
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Example Code
Bind_to_SelfReferential_Data/Employees.cs(vb)
C#using System.Collections.Generic;
namespace Bind_to_SelfReferential_Data {
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 Employees {
public static List<Employee> GetStaff() {
List<Employee> staff = new List<Employee>();
staff.Add(new Employee() { ID = 1, ParentID = 0, Name = "Gregory S. Price", Department = "", Position = "President" });
staff.Add(new Employee() { ID = 2, ParentID = 1, Name = "Irma R. Marshall", Department = "Marketing", Position = "Vice President" });
staff.Add(new Employee() { ID = 3, ParentID = 1, Name = "John C. Powell", Department = "Operations", Position = "Vice President" });
staff.Add(new Employee() { ID = 4, ParentID = 1, Name = "Christian P. Laclair", Department = "Production", Position = "Vice President" });
staff.Add(new Employee() { ID = 5, ParentID = 1, Name = "Karen J. Kelly", Department = "Finance", Position = "Vice President" });
staff.Add(new Employee() { ID = 6, ParentID = 2, Name = "Brian C. Cowling", Department = "Marketing", Position = "Manager" });
staff.Add(new Employee() { ID = 7, ParentID = 2, Name = "Thomas C. Dawson", Department = "Marketing", Position = "Manager" });
staff.Add(new Employee() { ID = 8, ParentID = 2, Name = "Angel M. Wilson", Department = "Marketing", Position = "Manager" });
staff.Add(new Employee() { ID = 9, ParentID = 2, Name = "Bryan R. Henderson", Department = "Marketing", Position = "Manager" });
staff.Add(new Employee() { ID = 10, ParentID = 3, Name = "Harold S. Brandes", Department = "Operations", Position = "Manager" });
staff.Add(new Employee() { ID = 11, ParentID = 3, Name = "Michael S. Blevins", Department = "Operations", Position = "Manager" });
staff.Add(new Employee() { ID = 12, ParentID = 3, Name = "Jan K. Sisk", Department = "Operations", Position = "Manager" });
staff.Add(new Employee() { ID = 13, ParentID = 3, Name = "Sidney L. Holder", Department = "Operations", Position = "Manager" });
staff.Add(new Employee() { ID = 14, ParentID = 4, Name = "James L. Kelsey", Department = "Production", Position = "Manager" });
staff.Add(new Employee() { ID = 15, ParentID = 4, Name = "Howard M. Carpenter", Department = "Production", Position = "Manager" });
staff.Add(new Employee() { ID = 16, ParentID = 4, Name = "Jennifer T. Tapia", Department = "Production", Position = "Manager" });
staff.Add(new Employee() { ID = 17, ParentID = 5, Name = "Judith P. Underhill", Department = "Finance", Position = "Manager" });
staff.Add(new Employee() { ID = 18, ParentID = 5, Name = "Russell E. Belton", Department = "Finance", Position = "Manager" });
return staff;
}
}
}
Bind_to_SelfReferential_Data/MainWindow.xaml
XAML<Window x:Class="Bind_to_SelfReferential_Data.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:Bind_to_SelfReferential_Data"
Title="MainWindow" Height="350" Width="525"
xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid">
<Grid>
<dxg:GridControl x:Name="grid">
<dxg:GridControl.Columns>
<dxg:GridColumn FieldName="Name" Header="Employee Name"/>
<dxg:GridColumn FieldName="Position"/>
<dxg:GridColumn FieldName="Department"/>
</dxg:GridControl.Columns>
<dxg:GridControl.View>
<dxg:TreeListView AutoWidth="True"
KeyFieldName="ID" ParentFieldName="ParentID"
AutoExpandAllNodes="True"
TreeDerivationMode="Selfreference"/>
</dxg:GridControl.View>
</dxg:GridControl>
</Grid>
</Window>