TreeList supports plain and hierarchical data structures. If a data source has a hierarchical structure, set the dataStructure property to "tree" and use the itemsExpr property to specify the data field that contains child nodes. The TreeList automatically generates identifiers for all nodes and links them with each other. Refer to the following demo for more information: Simple Array: Hierarchical Structure.
In a plain data structure, each node must have a unique identifier and a reference to its parent node. To specify data fields that store the identifiers and the references, use the keyExpr and parentIdExpr properties. Top-level nodes descend from the root node. To specify its identifier, use the rootValue property. In this tutorial, we use a plain data structure.
The TreeList component can load and update data from different data source types. To use a local array as in this tutorial, assign it to the dataSource property. If you want to use another data source type, refer to one of the following articles:
jQuery$(function() {
$("#treeList").dxTreeList({
dataSource: employees,
rootValue: -1,
keyExpr: "ID",
parentIdExpr: "HeadID"
});
});
const employees = [{
"ID": 1,
"HeadID": -1,
"FullName": "John Heart",
"Prefix": "Mr.",
"Position": "CEO",
"City": "Los Angeles",
"State": "California",
"Email": "jheart@dx-email.com",
"Skype": "jheart_DX_skype",
"MobilePhone": "(213) 555-9392",
"BirthDate": "1964-03-16",
"HireDate": "1995-01-15"
}, {
"ID": 2,
"HeadID": 1,
"FullName": "Samantha Bright",
"Prefix": "Dr.",
"Position": "COO",
"City": "Los Angeles",
"State": "California",
"Email": "samanthab@dx-email.com",
"Skype": "samanthab_DX_skype",
"MobilePhone": "(213) 555-2858",
"BirthDate": "1966-05-02",
"HireDate": "2004-05-24"
}, {
"ID": 3,
"HeadID": 1,
"FullName": "Arthur Miller",
"Prefix": "Mr.",
"Position": "CTO",
"City": "Denver",
"State": "Colorado",
"Email": "arthurm@dx-email.com",
"Skype": "arthurm_DX_skype",
"MobilePhone": "(310) 555-8583",
"BirthDate": "1972-07-11",
"HireDate": "2007-12-18"
}, {
"ID": 4,
"HeadID": 1,
"FullName": "Robert Reagan",
"Prefix": "Mr.",
"Position": "CMO",
"City": "Bentonville",
"State": "Arkansas",
"Email": "robertr@dx-email.com",
"Skype": "robertr_DX_skype",
"MobilePhone": "(818) 555-2387",
"BirthDate": "1974-09-07",
"HireDate": "2002-11-08"
}, {
"ID": 5,
"HeadID": 1,
"FullName": "Greta Sims",
"Prefix": "Ms.",
"Position": "HR Manager",
"City": "Atlanta",
"State": "Georgia",
"Email": "gretas@dx-email.com",
"Skype": "gretas_DX_skype",
"MobilePhone": "(818) 555-6546",
"BirthDate": "1977-11-22",
"HireDate": "1998-04-23"
}, {
"ID": 6,
"HeadID": 3,
"FullName": "Brett Wade",
"Prefix": "Mr.",
"Position": "IT Manager",
"City": "Reno",
"State": "Nevada",
"Email": "brettw@dx-email.com",
"Skype": "brettw_DX_skype",
"MobilePhone": "(626) 555-0358",
"BirthDate": "1968-12-01",
"HireDate": "2009-03-06"
}, {
"ID": 7,
"HeadID": 5,
"FullName": "Sandra Johnson",
"Prefix": "Mrs.",
"Position": "Controller",
"City": "Beaver",
"State": "Utah",
"Email": "sandraj@dx-email.com",
"Skype": "sandraj_DX_skype",
"MobilePhone": "(562) 555-2082",
"BirthDate": "1974-11-15",
"HireDate": "2005-05-11"
}, {
"ID": 8,
"HeadID": 4,
"FullName": "Ed Holmes",
"Prefix": "Dr.",
"Position": "Sales Manager",
"City": "Malibu",
"State": "California",
"Email": "edwardh@dx-email.com",
"Skype": "edwardh_DX_skype",
"MobilePhone": "(310) 555-1288",
"BirthDate": "1973-07-14",
"HireDate": "2005-06-19"
}, {
"ID": 9,
"HeadID": 3,
"FullName": "Barb Banks",
"Prefix": "Mrs.",
"Position": "Support Manager",
"City": "Phoenix",
"State": "Arizona",
"Email": "barbarab@dx-email.com",
"Skype": "barbarab_DX_skype",
"MobilePhone": "(310) 555-3355",
"BirthDate": "1979-04-14",
"HireDate": "2002-08-07"
}, {
"ID": 10,
"HeadID": 2,
"FullName": "Kevin Carter",
"Prefix": "Mr.",
"Position": "Shipping Manager",
"City": "San Diego",
"State": "California",
"Email": "kevinc@dx-email.com",
"Skype": "kevinc_DX_skype",
"MobilePhone": "(213) 555-2840",
"BirthDate": "1978-01-09",
"HireDate": "2009-08-11"
}, {
"ID": 11,
"HeadID": 5,
"FullName": "Cindy Stanwick",
"Prefix": "Ms.",
"Position": "HR Assistant",
"City": "Little Rock",
"State": "Arkansas",
"Email": "cindys@dx-email.com",
"Skype": "cindys_DX_skype",
"MobilePhone": "(818) 555-6655",
"BirthDate": "1985-06-05",
"HireDate": "2008-03-24"
}, {
"ID": 12,
"HeadID": 8,
"FullName": "Sammy Hill",
"Prefix": "Mr.",
"Position": "Sales Assistant",
"City": "Pasadena",
"State": "California",
"Email": "sammyh@dx-email.com",
"Skype": "sammyh_DX_skype",
"MobilePhone": "(626) 555-7292",
"BirthDate": "1984-02-17",
"HireDate": "2012-02-01"
}, {
"ID": 13,
"HeadID": 10,
"FullName": "Davey Jones",
"Prefix": "Mr.",
"Position": "Shipping Assistant",
"City": "Pasadena",
"State": "California",
"Email": "davidj@dx-email.com",
"Skype": "davidj_DX_skype",
"MobilePhone": "(626) 555-0281",
"BirthDate": "1983-03-06",
"HireDate": "2011-04-24"
}, {
"ID": 14,
"HeadID": 10,
"FullName": "Victor Norris",
"Prefix": "Mr.",
"Position": "Shipping Assistant",
"City": "Little Rock",
"State": "Arkansas",
"Email": "victorn@dx-email.com",
"Skype": "victorn_DX_skype",
"MobilePhone": "(213) 555-9278",
"BirthDate": "1986-07-23",
"HireDate": "2012-07-23"
}, {
"ID": 15,
"HeadID": 10,
"FullName": "Mary Stern",
"Prefix": "Ms.",
"Position": "Shipping Assistant",
"City": "Beaver",
"State": "Utah",
"Email": "marys@dx-email.com",
"Skype": "marys_DX_skype",
"MobilePhone": "(818) 555-7857",
"BirthDate": "1982-04-08",
"HireDate": "2012-08-12"
}, {
"ID": 16,
"HeadID": 10,
"FullName": "Robin Cosworth",
"Prefix": "Mrs.",
"Position": "Shipping Assistant",
"City": "Los Angeles",
"State": "California",
"Email": "robinc@dx-email.com",
"Skype": "robinc_DX_skype",
"MobilePhone": "(818) 555-0942",
"BirthDate": "1981-06-12",
"HireDate": "2012-09-01"
}, {
"ID": 17,
"HeadID": 9,
"FullName": "Kelly Rodriguez",
"Prefix": "Ms.",
"Position": "Support Assistant",
"City": "Boise",
"State": "Idaho",
"Email": "kellyr@dx-email.com",
"Skype": "kellyr_DX_skype",
"MobilePhone": "(818) 555-9248",
"BirthDate": "1988-05-11",
"HireDate": "2012-10-13"
}, {
"ID": 18,
"HeadID": 9,
"FullName": "James Anderson",
"Prefix": "Mr.",
"Position": "Support Assistant",
"City": "Atlanta",
"State": "Georgia",
"Email": "jamesa@dx-email.com",
"Skype": "jamesa_DX_skype",
"MobilePhone": "(323) 555-4702",
"BirthDate": "1987-01-29",
"HireDate": "2012-10-18"
}, {
"ID": 19,
"HeadID": 9,
"FullName": "Antony Remmen",
"Prefix": "Mr.",
"Position": "Support Assistant",
"City": "Boise",
"State": "Idaho",
"Email": "anthonyr@dx-email.com",
"Skype": "anthonyr_DX_skype",
"MobilePhone": "(310) 555-6625",
"BirthDate": "1986-02-19",
"HireDate": "2013-01-19"
}, {
"ID": 20,
"HeadID": 8,
"FullName": "Olivia Peyton",
"Prefix": "Mrs.",
"Position": "Sales Assistant",
"City": "Atlanta",
"State": "Georgia",
"Email": "oliviap@dx-email.com",
"Skype": "oliviap_DX_skype",
"MobilePhone": "(310) 555-2728",
"BirthDate": "1981-06-03",
"HireDate": "2012-05-14"
}, {
"ID": 21,
"HeadID": 6,
"FullName": "Taylor Riley",
"Prefix": "Mr.",
"Position": "Network Admin",
"City": "San Jose",
"State": "California",
"Email": "taylorr@dx-email.com",
"Skype": "taylorr_DX_skype",
"MobilePhone": "(310) 555-7276",
"BirthDate": "1982-08-14",
"HireDate": "2012-04-14"
}, {
"ID": 22,
"HeadID": 6,
"FullName": "Amelia Harper",
"Prefix": "Mrs.",
"Position": "Network Admin",
"City": "Los Angeles",
"State": "California",
"Email": "ameliah@dx-email.com",
"Skype": "ameliah_DX_skype",
"MobilePhone": "(213) 555-4276",
"BirthDate": "1983-11-19",
"HireDate": "2011-02-10"
}, {
"ID": 23,
"HeadID": 6,
"FullName": "Wally Hobbs",
"Prefix": "Mr.",
"Position": "Programmer",
"City": "Chatsworth",
"State": "California",
"Email": "wallyh@dx-email.com",
"Skype": "wallyh_DX_skype",
"MobilePhone": "(818) 555-8872",
"BirthDate": "1984-12-24",
"HireDate": "2011-02-17"
}, {
"ID": 24,
"HeadID": 6,
"FullName": "Brad Jameson",
"Prefix": "Mr.",
"Position": "Programmer",
"City": "San Fernando",
"State": "California",
"Email": "bradleyj@dx-email.com",
"Skype": "bradleyj_DX_skype",
"MobilePhone": "(818) 555-4646",
"BirthDate": "1988-10-12",
"HireDate": "2011-03-02"
}, {
"ID": 25,
"HeadID": 6,
"FullName": "Karen Goodson",
"Prefix": "Miss",
"Position": "Programmer",
"City": "South Pasadena",
"State": "California",
"Email": "kareng@dx-email.com",
"Skype": "kareng_DX_skype",
"MobilePhone": "(626) 555-0908",
"BirthDate": "1987-04-26",
"HireDate": "2011-03-14"
}, {
"ID": 26,
"HeadID": 5,
"FullName": "Marcus Orbison",
"Prefix": "Mr.",
"Position": "Travel Coordinator",
"City": "Los Angeles",
"State": "California",
"Email": "marcuso@dx-email.com",
"Skype": "marcuso_DX_skype",
"MobilePhone": "(213) 555-7098",
"BirthDate": "1982-03-02",
"HireDate": "2005-05-19"
}, {
"ID": 27,
"HeadID": 5,
"FullName": "Sandy Bright",
"Prefix": "Ms.",
"Position": "Benefits Coordinator",
"City": "Denver",
"State": "Colorado",
"Email": "sandrab@dx-email.com",
"Skype": "sandrab_DX_skype",
"MobilePhone": "(818) 555-0524",
"BirthDate": "1983-09-11",
"HireDate": "2005-06-04"
}, {
"ID": 28,
"HeadID": 6,
"FullName": "Morgan Kennedy",
"Prefix": "Mrs.",
"Position": "Graphic Designer",
"City": "San Fernando Valley",
"State": "California",
"Email": "morgank@dx-email.com",
"Skype": "morgank_DX_skype",
"MobilePhone": "(818) 555-8238",
"BirthDate": "1984-07-17",
"HireDate": "2012-01-11"
}, {
"ID": 29,
"HeadID": 28,
"FullName": "Violet Bailey",
"Prefix": "Ms.",
"Position": "Jr Graphic Designer",
"City": "La Canada",
"State": "California",
"Email": "violetb@dx-email.com",
"Skype": "violetb_DX_skype",
"MobilePhone": "(818) 555-2478",
"BirthDate": "1985-06-10",
"HireDate": "2012-01-19"
}, {
"ID": 30,
"HeadID": 5,
"FullName": "Ken Samuelson",
"Prefix": "Dr.",
"Position": "Ombudsman",
"City": "St. Louis",
"State": "Missouri",
"Email": "kents@dx-email.com",
"Skype": "kents_DX_skype",
"MobilePhone": "(562) 555-9282",
"BirthDate": "1972-09-11",
"HireDate": "2009-04-22"
}]; Angular
<dx-tree-list
[dataSource]="employees"
[rootValue]="-1"
keyExpr="ID"
parentIdExpr="HeadID">
</dx-tree-list>
import { Component } from '@angular/core';
import { Employee, EmployeesService } from './employees.service';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
employees: Employee[] = [];
constructor(service: EmployeesService) {
this.employees = service.getEmployees();
}
}
import { Injectable } from '@angular/core';
export interface Employee {
ID: Number,
HeadID: Number,
FullName: String,
Position: String,
City: String,
State: String,
Email: String,
Skype: String,
MobilePhone: String,
BirthDate: String,
HireDate: String,
}
const employees: Employee[] = [{
"ID": 1,
"HeadID": -1,
"FullName": "John Heart",
"Position": "CEO",
"City": "Los Angeles",
"State": "California",
"Email": "jheart@dx-email.com",
"Skype": "jheart_DX_skype",
"MobilePhone": "(213) 555-9392",
"BirthDate": "1964-03-16",
"HireDate": "1995-01-15"
}, {
"ID": 2,
"HeadID": 1,
"FullName": "Samantha Bright",
"Position": "COO",
"City": "Los Angeles",
"State": "California",
"Email": "samanthab@dx-email.com",
"Skype": "samanthab_DX_skype",
"MobilePhone": "(213) 555-2858",
"BirthDate": "1966-05-02",
"HireDate": "2004-05-24"
}, {
"ID": 3,
"HeadID": 1,
"FullName": "Arthur Miller",
"Position": "CTO",
"City": "Denver",
"State": "Colorado",
"Email": "arthurm@dx-email.com",
"Skype": "arthurm_DX_skype",
"MobilePhone": "(310) 555-8583",
"BirthDate": "1972-07-11",
"HireDate": "2007-12-18"
}, {
"ID": 4,
"HeadID": 1,
"FullName": "Robert Reagan",
"Position": "CMO",
"City": "Bentonville",
"State": "Arkansas",
"Email": "robertr@dx-email.com",
"Skype": "robertr_DX_skype",
"MobilePhone": "(818) 555-2387",
"BirthDate": "1974-09-07",
"HireDate": "2002-11-08"
}, {
"ID": 5,
"HeadID": 1,
"FullName": "Greta Sims",
"Position": "HR Manager",
"City": "Atlanta",
"State": "Georgia",
"Email": "gretas@dx-email.com",
"Skype": "gretas_DX_skype",
"MobilePhone": "(818) 555-6546",
"BirthDate": "1977-11-22",
"HireDate": "1998-04-23"
}, {
"ID": 6,
"HeadID": 3,
"FullName": "Brett Wade",
"Position": "IT Manager",
"City": "Reno",
"State": "Nevada",
"Email": "brettw@dx-email.com",
"Skype": "brettw_DX_skype",
"MobilePhone": "(626) 555-0358",
"BirthDate": "1968-12-01",
"HireDate": "2009-03-06"
}, {
"ID": 7,
"HeadID": 5,
"FullName": "Sandra Johnson",
"Position": "Controller",
"City": "Beaver",
"State": "Utah",
"Email": "sandraj@dx-email.com",
"Skype": "sandraj_DX_skype",
"MobilePhone": "(562) 555-2082",
"BirthDate": "1974-11-15",
"HireDate": "2005-05-11"
}, {
"ID": 8,
"HeadID": 4,
"FullName": "Ed Holmes",
"Position": "Sales Manager",
"City": "Malibu",
"State": "California",
"Email": "edwardh@dx-email.com",
"Skype": "edwardh_DX_skype",
"MobilePhone": "(310) 555-1288",
"BirthDate": "1973-07-14",
"HireDate": "2005-06-19"
}, {
"ID": 9,
"HeadID": 3,
"FullName": "Barb Banks",
"Position": "Support Manager",
"City": "Phoenix",
"State": "Arizona",
"Email": "barbarab@dx-email.com",
"Skype": "barbarab_DX_skype",
"MobilePhone": "(310) 555-3355",
"BirthDate": "1979-04-14",
"HireDate": "2002-08-07"
}, {
"ID": 10,
"HeadID": 2,
"FullName": "Kevin Carter",
"Position": "Shipping Manager",
"City": "San Diego",
"State": "California",
"Email": "kevinc@dx-email.com",
"Skype": "kevinc_DX_skype",
"MobilePhone": "(213) 555-2840",
"BirthDate": "1978-01-09",
"HireDate": "2009-08-11"
}, {
"ID": 11,
"HeadID": 5,
"FullName": "Cindy Stanwick",
"Position": "HR Assistant",
"City": "Little Rock",
"State": "Arkansas",
"Email": "cindys@dx-email.com",
"Skype": "cindys_DX_skype",
"MobilePhone": "(818) 555-6655",
"BirthDate": "1985-06-05",
"HireDate": "2008-03-24"
}, {
"ID": 12,
"HeadID": 8,
"FullName": "Sammy Hill",
"Position": "Sales Assistant",
"City": "Pasadena",
"State": "California",
"Email": "sammyh@dx-email.com",
"Skype": "sammyh_DX_skype",
"MobilePhone": "(626) 555-7292",
"BirthDate": "1984-02-17",
"HireDate": "2012-02-01"
}, {
"ID": 13,
"HeadID": 10,
"FullName": "Davey Jones",
"Position": "Shipping Assistant",
"City": "Pasadena",
"State": "California",
"Email": "davidj@dx-email.com",
"Skype": "davidj_DX_skype",
"MobilePhone": "(626) 555-0281",
"BirthDate": "1983-03-06",
"HireDate": "2011-04-24"
}, {
"ID": 14,
"HeadID": 10,
"FullName": "Victor Norris",
"Position": "Shipping Assistant",
"City": "Little Rock",
"State": "Arkansas",
"Email": "victorn@dx-email.com",
"Skype": "victorn_DX_skype",
"MobilePhone": "(213) 555-9278",
"BirthDate": "1986-07-23",
"HireDate": "2012-07-23"
}, {
"ID": 15,
"HeadID": 10,
"FullName": "Mary Stern",
"Position": "Shipping Assistant",
"City": "Beaver",
"State": "Utah",
"Email": "marys@dx-email.com",
"Skype": "marys_DX_skype",
"MobilePhone": "(818) 555-7857",
"BirthDate": "1982-04-08",
"HireDate": "2012-08-12"
}, {
"ID": 16,
"HeadID": 10,
"FullName": "Robin Cosworth",
"Position": "Shipping Assistant",
"City": "Los Angeles",
"State": "California",
"Email": "robinc@dx-email.com",
"Skype": "robinc_DX_skype",
"MobilePhone": "(818) 555-0942",
"BirthDate": "1981-06-12",
"HireDate": "2012-09-01"
}, {
"ID": 17,
"HeadID": 9,
"FullName": "Kelly Rodriguez",
"Position": "Support Assistant",
"City": "Boise",
"State": "Idaho",
"Email": "kellyr@dx-email.com",
"Skype": "kellyr_DX_skype",
"MobilePhone": "(818) 555-9248",
"BirthDate": "1988-05-11",
"HireDate": "2012-10-13"
}, {
"ID": 18,
"HeadID": 9,
"FullName": "James Anderson",
"Position": "Support Assistant",
"City": "Atlanta",
"State": "Georgia",
"Email": "jamesa@dx-email.com",
"Skype": "jamesa_DX_skype",
"MobilePhone": "(323) 555-4702",
"BirthDate": "1987-01-29",
"HireDate": "2012-10-18"
}, {
"ID": 19,
"HeadID": 9,
"FullName": "Antony Remmen",
"Position": "Support Assistant",
"City": "Boise",
"State": "Idaho",
"Email": "anthonyr@dx-email.com",
"Skype": "anthonyr_DX_skype",
"MobilePhone": "(310) 555-6625",
"BirthDate": "1986-02-19",
"HireDate": "2013-01-19"
}, {
"ID": 20,
"HeadID": 8,
"FullName": "Olivia Peyton",
"Position": "Sales Assistant",
"City": "Atlanta",
"State": "Georgia",
"Email": "oliviap@dx-email.com",
"Skype": "oliviap_DX_skype",
"MobilePhone": "(310) 555-2728",
"BirthDate": "1981-06-03",
"HireDate": "2012-05-14"
}, {
"ID": 21,
"HeadID": 6,
"FullName": "Taylor Riley",
"Position": "Network Admin",
"City": "San Jose",
"State": "California",
"Email": "taylorr@dx-email.com",
"Skype": "taylorr_DX_skype",
"MobilePhone": "(310) 555-7276",
"BirthDate": "1982-08-14",
"HireDate": "2012-04-14"
}, {
"ID": 22,
"HeadID": 6,
"FullName": "Amelia Harper",
"Position": "Network Admin",
"City": "Los Angeles",
"State": "California",
"Email": "ameliah@dx-email.com",
"Skype": "ameliah_DX_skype",
"MobilePhone": "(213) 555-4276",
"BirthDate": "1983-11-19",
"HireDate": "2011-02-10"
}, {
"ID": 23,
"HeadID": 6,
"FullName": "Wally Hobbs",
"Position": "Programmer",
"City": "Chatsworth",
"State": "California",
"Email": "wallyh@dx-email.com",
"Skype": "wallyh_DX_skype",
"MobilePhone": "(818) 555-8872",
"BirthDate": "1984-12-24",
"HireDate": "2011-02-17"
}, {
"ID": 24,
"HeadID": 6,
"FullName": "Brad Jameson",
"Position": "Programmer",
"City": "San Fernando",
"State": "California",
"Email": "bradleyj@dx-email.com",
"Skype": "bradleyj_DX_skype",
"MobilePhone": "(818) 555-4646",
"BirthDate": "1988-10-12",
"HireDate": "2011-03-02"
}, {
"ID": 25,
"HeadID": 6,
"FullName": "Karen Goodson",
"Position": "Programmer",
"City": "South Pasadena",
"State": "California",
"Email": "kareng@dx-email.com",
"Skype": "kareng_DX_skype",
"MobilePhone": "(626) 555-0908",
"BirthDate": "1987-04-26",
"HireDate": "2011-03-14"
}, {
"ID": 26,
"HeadID": 5,
"FullName": "Marcus Orbison",
"Position": "Travel Coordinator",
"City": "Los Angeles",
"State": "California",
"Email": "marcuso@dx-email.com",
"Skype": "marcuso_DX_skype",
"MobilePhone": "(213) 555-7098",
"BirthDate": "1982-03-02",
"HireDate": "2005-05-19"
}, {
"ID": 27,
"HeadID": 5,
"FullName": "Sandy Bright",
"Position": "Benefits Coordinator",
"City": "Denver",
"State": "Colorado",
"Email": "sandrab@dx-email.com",
"Skype": "sandrab_DX_skype",
"MobilePhone": "(818) 555-0524",
"BirthDate": "1983-09-11",
"HireDate": "2005-06-04"
}, {
"ID": 28,
"HeadID": 6,
"FullName": "Morgan Kennedy",
"Position": "Graphic Designer",
"City": "San Fernando Valley",
"State": "California",
"Email": "morgank@dx-email.com",
"Skype": "morgank_DX_skype",
"MobilePhone": "(818) 555-8238",
"BirthDate": "1984-07-17",
"HireDate": "2012-01-11"
}, {
"ID": 29,
"HeadID": 28,
"FullName": "Violet Bailey",
"Position": "Jr Graphic Designer",
"City": "La Canada",
"State": "California",
"Email": "violetb@dx-email.com",
"Skype": "violetb_DX_skype",
"MobilePhone": "(818) 555-2478",
"BirthDate": "1985-06-10",
"HireDate": "2012-01-19"
}, {
"ID": 30,
"HeadID": 5,
"FullName": "Ken Samuelson",
"Position": "Ombudsman",
"City": "St. Louis",
"State": "Missouri",
"Email": "kents@dx-email.com",
"Skype": "kents_DX_skype",
"MobilePhone": "(562) 555-9282",
"BirthDate": "1972-09-11",
"HireDate": "2009-04-22"
}];
@Injectable({
providedIn: 'root'
})
export class EmployeesService {
getEmployees(): Employee[] {
return employees;
}
} Vue
<template>
<div id="app-container">
<DxTreeList
:data-source="employees"
:root-value="-1"
key-expr="ID"
parent-id-expr="HeadID">
</DxTreeList>
</div>
</template>
<script>
// ...
import service from './employees.service';
export default {
// ...
data() {
return {
employees: service.getEmployees(),
}
},
}
</script>
const employees = [{
"ID": 1,
"HeadID": -1,
"FullName": "John Heart",
"Position": "CEO",
"City": "Los Angeles",
"State": "California",
"Email": "jheart@dx-email.com",
"Skype": "jheart_DX_skype",
"MobilePhone": "(213) 555-9392",
"BirthDate": "1964-03-16",
"HireDate": "1995-01-15"
}, {
"ID": 2,
"HeadID": 1,
"FullName": "Samantha Bright",
"Position": "COO",
"City": "Los Angeles",
"State": "California",
"Email": "samanthab@dx-email.com",
"Skype": "samanthab_DX_skype",
"MobilePhone": "(213) 555-2858",
"BirthDate": "1966-05-02",
"HireDate": "2004-05-24"
}, {
"ID": 3,
"HeadID": 1,
"FullName": "Arthur Miller",
"Position": "CTO",
"City": "Denver",
"State": "Colorado",
"Email": "arthurm@dx-email.com",
"Skype": "arthurm_DX_skype",
"MobilePhone": "(310) 555-8583",
"BirthDate": "1972-07-11",
"HireDate": "2007-12-18"
}, {
"ID": 4,
"HeadID": 1,
"FullName": "Robert Reagan",
"Position": "CMO",
"City": "Bentonville",
"State": "Arkansas",
"Email": "robertr@dx-email.com",
"Skype": "robertr_DX_skype",
"MobilePhone": "(818) 555-2387",
"BirthDate": "1974-09-07",
"HireDate": "2002-11-08"
}, {
"ID": 5,
"HeadID": 1,
"FullName": "Greta Sims",
"Position": "HR Manager",
"City": "Atlanta",
"State": "Georgia",
"Email": "gretas@dx-email.com",
"Skype": "gretas_DX_skype",
"MobilePhone": "(818) 555-6546",
"BirthDate": "1977-11-22",
"HireDate": "1998-04-23"
}, {
"ID": 6,
"HeadID": 3,
"FullName": "Brett Wade",
"Position": "IT Manager",
"City": "Reno",
"State": "Nevada",
"Email": "brettw@dx-email.com",
"Skype": "brettw_DX_skype",
"MobilePhone": "(626) 555-0358",
"BirthDate": "1968-12-01",
"HireDate": "2009-03-06"
}, {
"ID": 7,
"HeadID": 5,
"FullName": "Sandra Johnson",
"Position": "Controller",
"City": "Beaver",
"State": "Utah",
"Email": "sandraj@dx-email.com",
"Skype": "sandraj_DX_skype",
"MobilePhone": "(562) 555-2082",
"BirthDate": "1974-11-15",
"HireDate": "2005-05-11"
}, {
"ID": 8,
"HeadID": 4,
"FullName": "Ed Holmes",
"Position": "Sales Manager",
"City": "Malibu",
"State": "California",
"Email": "edwardh@dx-email.com",
"Skype": "edwardh_DX_skype",
"MobilePhone": "(310) 555-1288",
"BirthDate": "1973-07-14",
"HireDate": "2005-06-19"
}, {
"ID": 9,
"HeadID": 3,
"FullName": "Barb Banks",
"Position": "Support Manager",
"City": "Phoenix",
"State": "Arizona",
"Email": "barbarab@dx-email.com",
"Skype": "barbarab_DX_skype",
"MobilePhone": "(310) 555-3355",
"BirthDate": "1979-04-14",
"HireDate": "2002-08-07"
}, {
"ID": 10,
"HeadID": 2,
"FullName": "Kevin Carter",
"Position": "Shipping Manager",
"City": "San Diego",
"State": "California",
"Email": "kevinc@dx-email.com",
"Skype": "kevinc_DX_skype",
"MobilePhone": "(213) 555-2840",
"BirthDate": "1978-01-09",
"HireDate": "2009-08-11"
}, {
"ID": 11,
"HeadID": 5,
"FullName": "Cindy Stanwick",
"Position": "HR Assistant",
"City": "Little Rock",
"State": "Arkansas",
"Email": "cindys@dx-email.com",
"Skype": "cindys_DX_skype",
"MobilePhone": "(818) 555-6655",
"BirthDate": "1985-06-05",
"HireDate": "2008-03-24"
}, {
"ID": 12,
"HeadID": 8,
"FullName": "Sammy Hill",
"Position": "Sales Assistant",
"City": "Pasadena",
"State": "California",
"Email": "sammyh@dx-email.com",
"Skype": "sammyh_DX_skype",
"MobilePhone": "(626) 555-7292",
"BirthDate": "1984-02-17",
"HireDate": "2012-02-01"
}, {
"ID": 13,
"HeadID": 10,
"FullName": "Davey Jones",
"Position": "Shipping Assistant",
"City": "Pasadena",
"State": "California",
"Email": "davidj@dx-email.com",
"Skype": "davidj_DX_skype",
"MobilePhone": "(626) 555-0281",
"BirthDate": "1983-03-06",
"HireDate": "2011-04-24"
}, {
"ID": 14,
"HeadID": 10,
"FullName": "Victor Norris",
"Position": "Shipping Assistant",
"City": "Little Rock",
"State": "Arkansas",
"Email": "victorn@dx-email.com",
"Skype": "victorn_DX_skype",
"MobilePhone": "(213) 555-9278",
"BirthDate": "1986-07-23",
"HireDate": "2012-07-23"
}, {
"ID": 15,
"HeadID": 10,
"FullName": "Mary Stern",
"Position": "Shipping Assistant",
"City": "Beaver",
"State": "Utah",
"Email": "marys@dx-email.com",
"Skype": "marys_DX_skype",
"MobilePhone": "(818) 555-7857",
"BirthDate": "1982-04-08",
"HireDate": "2012-08-12"
}, {
"ID": 16,
"HeadID": 10,
"FullName": "Robin Cosworth",
"Position": "Shipping Assistant",
"City": "Los Angeles",
"State": "California",
"Email": "robinc@dx-email.com",
"Skype": "robinc_DX_skype",
"MobilePhone": "(818) 555-0942",
"BirthDate": "1981-06-12",
"HireDate": "2012-09-01"
}, {
"ID": 17,
"HeadID": 9,
"FullName": "Kelly Rodriguez",
"Position": "Support Assistant",
"City": "Boise",
"State": "Idaho",
"Email": "kellyr@dx-email.com",
"Skype": "kellyr_DX_skype",
"MobilePhone": "(818) 555-9248",
"BirthDate": "1988-05-11",
"HireDate": "2012-10-13"
}, {
"ID": 18,
"HeadID": 9,
"FullName": "James Anderson",
"Position": "Support Assistant",
"City": "Atlanta",
"State": "Georgia",
"Email": "jamesa@dx-email.com",
"Skype": "jamesa_DX_skype",
"MobilePhone": "(323) 555-4702",
"BirthDate": "1987-01-29",
"HireDate": "2012-10-18"
}, {
"ID": 19,
"HeadID": 9,
"FullName": "Antony Remmen",
"Position": "Support Assistant",
"City": "Boise",
"State": "Idaho",
"Email": "anthonyr@dx-email.com",
"Skype": "anthonyr_DX_skype",
"MobilePhone": "(310) 555-6625",
"BirthDate": "1986-02-19",
"HireDate": "2013-01-19"
}, {
"ID": 20,
"HeadID": 8,
"FullName": "Olivia Peyton",
"Position": "Sales Assistant",
"City": "Atlanta",
"State": "Georgia",
"Email": "oliviap@dx-email.com",
"Skype": "oliviap_DX_skype",
"MobilePhone": "(310) 555-2728",
"BirthDate": "1981-06-03",
"HireDate": "2012-05-14"
}, {
"ID": 21,
"HeadID": 6,
"FullName": "Taylor Riley",
"Position": "Network Admin",
"City": "San Jose",
"State": "California",
"Email": "taylorr@dx-email.com",
"Skype": "taylorr_DX_skype",
"MobilePhone": "(310) 555-7276",
"BirthDate": "1982-08-14",
"HireDate": "2012-04-14"
}, {
"ID": 22,
"HeadID": 6,
"FullName": "Amelia Harper",
"Position": "Network Admin",
"City": "Los Angeles",
"State": "California",
"Email": "ameliah@dx-email.com",
"Skype": "ameliah_DX_skype",
"MobilePhone": "(213) 555-4276",
"BirthDate": "1983-11-19",
"HireDate": "2011-02-10"
}, {
"ID": 23,
"HeadID": 6,
"FullName": "Wally Hobbs",
"Position": "Programmer",
"City": "Chatsworth",
"State": "California",
"Email": "wallyh@dx-email.com",
"Skype": "wallyh_DX_skype",
"MobilePhone": "(818) 555-8872",
"BirthDate": "1984-12-24",
"HireDate": "2011-02-17"
}, {
"ID": 24,
"HeadID": 6,
"FullName": "Brad Jameson",
"Position": "Programmer",
"City": "San Fernando",
"State": "California",
"Email": "bradleyj@dx-email.com",
"Skype": "bradleyj_DX_skype",
"MobilePhone": "(818) 555-4646",
"BirthDate": "1988-10-12",
"HireDate": "2011-03-02"
}, {
"ID": 25,
"HeadID": 6,
"FullName": "Karen Goodson",
"Position": "Programmer",
"City": "South Pasadena",
"State": "California",
"Email": "kareng@dx-email.com",
"Skype": "kareng_DX_skype",
"MobilePhone": "(626) 555-0908",
"BirthDate": "1987-04-26",
"HireDate": "2011-03-14"
}, {
"ID": 26,
"HeadID": 5,
"FullName": "Marcus Orbison",
"Position": "Travel Coordinator",
"City": "Los Angeles",
"State": "California",
"Email": "marcuso@dx-email.com",
"Skype": "marcuso_DX_skype",
"MobilePhone": "(213) 555-7098",
"BirthDate": "1982-03-02",
"HireDate": "2005-05-19"
}, {
"ID": 27,
"HeadID": 5,
"FullName": "Sandy Bright",
"Position": "Benefits Coordinator",
"City": "Denver",
"State": "Colorado",
"Email": "sandrab@dx-email.com",
"Skype": "sandrab_DX_skype",
"MobilePhone": "(818) 555-0524",
"BirthDate": "1983-09-11",
"HireDate": "2005-06-04"
}, {
"ID": 28,
"HeadID": 6,
"FullName": "Morgan Kennedy",
"Position": "Graphic Designer",
"City": "San Fernando Valley",
"State": "California",
"Email": "morgank@dx-email.com",
"Skype": "morgank_DX_skype",
"MobilePhone": "(818) 555-8238",
"BirthDate": "1984-07-17",
"HireDate": "2012-01-11"
}, {
"ID": 29,
"HeadID": 28,
"FullName": "Violet Bailey",
"Position": "Jr Graphic Designer",
"City": "La Canada",
"State": "California",
"Email": "violetb@dx-email.com",
"Skype": "violetb_DX_skype",
"MobilePhone": "(818) 555-2478",
"BirthDate": "1985-06-10",
"HireDate": "2012-01-19"
}, {
"ID": 30,
"HeadID": 5,
"FullName": "Ken Samuelson",
"Position": "Ombudsman",
"City": "St. Louis",
"State": "Missouri",
"Email": "kents@dx-email.com",
"Skype": "kents_DX_skype",
"MobilePhone": "(562) 555-9282",
"BirthDate": "1972-09-11",
"HireDate": "2009-04-22"
}];
export default {
getEmployees() {
return employees;
}
} React
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import {
TreeList
} from 'devextreme-react/tree-list';
import { employees } from './employees';
function App() {
return (
<div className="App">
<TreeList
dataSource={employees}
rootValue={-1}
keyExpr="ID"
parentIdExpr="HeadID">
</TreeList>
</div>
);
}
export default App;
export const employees = [{
"ID": 1,
"HeadID": -1,
"FullName": "John Heart",
"Position": "CEO",
"City": "Los Angeles",
"State": "California",
"Email": "jheart@dx-email.com",
"Skype": "jheart_DX_skype",
"MobilePhone": "(213) 555-9392",
"BirthDate": "1964-03-16",
"HireDate": "1995-01-15"
}, {
"ID": 2,
"HeadID": 1,
"FullName": "Samantha Bright",
"Position": "COO",
"City": "Los Angeles",
"State": "California",
"Email": "samanthab@dx-email.com",
"Skype": "samanthab_DX_skype",
"MobilePhone": "(213) 555-2858",
"BirthDate": "1966-05-02",
"HireDate": "2004-05-24"
}, {
"ID": 3,
"HeadID": 1,
"FullName": "Arthur Miller",
"Position": "CTO",
"City": "Denver",
"State": "Colorado",
"Email": "arthurm@dx-email.com",
"Skype": "arthurm_DX_skype",
"MobilePhone": "(310) 555-8583",
"BirthDate": "1972-07-11",
"HireDate": "2007-12-18"
}, {
"ID": 4,
"HeadID": 1,
"FullName": "Robert Reagan",
"Position": "CMO",
"City": "Bentonville",
"State": "Arkansas",
"Email": "robertr@dx-email.com",
"Skype": "robertr_DX_skype",
"MobilePhone": "(818) 555-2387",
"BirthDate": "1974-09-07",
"HireDate": "2002-11-08"
}, {
"ID": 5,
"HeadID": 1,
"FullName": "Greta Sims",
"Position": "HR Manager",
"City": "Atlanta",
"State": "Georgia",
"Email": "gretas@dx-email.com",
"Skype": "gretas_DX_skype",
"MobilePhone": "(818) 555-6546",
"BirthDate": "1977-11-22",
"HireDate": "1998-04-23"
}, {
"ID": 6,
"HeadID": 3,
"FullName": "Brett Wade",
"Position": "IT Manager",
"City": "Reno",
"State": "Nevada",
"Email": "brettw@dx-email.com",
"Skype": "brettw_DX_skype",
"MobilePhone": "(626) 555-0358",
"BirthDate": "1968-12-01",
"HireDate": "2009-03-06"
}, {
"ID": 7,
"HeadID": 5,
"FullName": "Sandra Johnson",
"Position": "Controller",
"City": "Beaver",
"State": "Utah",
"Email": "sandraj@dx-email.com",
"Skype": "sandraj_DX_skype",
"MobilePhone": "(562) 555-2082",
"BirthDate": "1974-11-15",
"HireDate": "2005-05-11"
}, {
"ID": 8,
"HeadID": 4,
"FullName": "Ed Holmes",
"Position": "Sales Manager",
"City": "Malibu",
"State": "California",
"Email": "edwardh@dx-email.com",
"Skype": "edwardh_DX_skype",
"MobilePhone": "(310) 555-1288",
"BirthDate": "1973-07-14",
"HireDate": "2005-06-19"
}, {
"ID": 9,
"HeadID": 3,
"FullName": "Barb Banks",
"Position": "Support Manager",
"City": "Phoenix",
"State": "Arizona",
"Email": "barbarab@dx-email.com",
"Skype": "barbarab_DX_skype",
"MobilePhone": "(310) 555-3355",
"BirthDate": "1979-04-14",
"HireDate": "2002-08-07"
}, {
"ID": 10,
"HeadID": 2,
"FullName": "Kevin Carter",
"Position": "Shipping Manager",
"City": "San Diego",
"State": "California",
"Email": "kevinc@dx-email.com",
"Skype": "kevinc_DX_skype",
"MobilePhone": "(213) 555-2840",
"BirthDate": "1978-01-09",
"HireDate": "2009-08-11"
}, {
"ID": 11,
"HeadID": 5,
"FullName": "Cindy Stanwick",
"Position": "HR Assistant",
"City": "Little Rock",
"State": "Arkansas",
"Email": "cindys@dx-email.com",
"Skype": "cindys_DX_skype",
"MobilePhone": "(818) 555-6655",
"BirthDate": "1985-06-05",
"HireDate": "2008-03-24"
}, {
"ID": 12,
"HeadID": 8,
"FullName": "Sammy Hill",
"Position": "Sales Assistant",
"City": "Pasadena",
"State": "California",
"Email": "sammyh@dx-email.com",
"Skype": "sammyh_DX_skype",
"MobilePhone": "(626) 555-7292",
"BirthDate": "1984-02-17",
"HireDate": "2012-02-01"
}, {
"ID": 13,
"HeadID": 10,
"FullName": "Davey Jones",
"Position": "Shipping Assistant",
"City": "Pasadena",
"State": "California",
"Email": "davidj@dx-email.com",
"Skype": "davidj_DX_skype",
"MobilePhone": "(626) 555-0281",
"BirthDate": "1983-03-06",
"HireDate": "2011-04-24"
}, {
"ID": 14,
"HeadID": 10,
"FullName": "Victor Norris",
"Position": "Shipping Assistant",
"City": "Little Rock",
"State": "Arkansas",
"Email": "victorn@dx-email.com",
"Skype": "victorn_DX_skype",
"MobilePhone": "(213) 555-9278",
"BirthDate": "1986-07-23",
"HireDate": "2012-07-23"
}, {
"ID": 15,
"HeadID": 10,
"FullName": "Mary Stern",
"Position": "Shipping Assistant",
"City": "Beaver",
"State": "Utah",
"Email": "marys@dx-email.com",
"Skype": "marys_DX_skype",
"MobilePhone": "(818) 555-7857",
"BirthDate": "1982-04-08",
"HireDate": "2012-08-12"
}, {
"ID": 16,
"HeadID": 10,
"FullName": "Robin Cosworth",
"Position": "Shipping Assistant",
"City": "Los Angeles",
"State": "California",
"Email": "robinc@dx-email.com",
"Skype": "robinc_DX_skype",
"MobilePhone": "(818) 555-0942",
"BirthDate": "1981-06-12",
"HireDate": "2012-09-01"
}, {
"ID": 17,
"HeadID": 9,
"FullName": "Kelly Rodriguez",
"Position": "Support Assistant",
"City": "Boise",
"State": "Idaho",
"Email": "kellyr@dx-email.com",
"Skype": "kellyr_DX_skype",
"MobilePhone": "(818) 555-9248",
"BirthDate": "1988-05-11",
"HireDate": "2012-10-13"
}, {
"ID": 18,
"HeadID": 9,
"FullName": "James Anderson",
"Position": "Support Assistant",
"City": "Atlanta",
"State": "Georgia",
"Email": "jamesa@dx-email.com",
"Skype": "jamesa_DX_skype",
"MobilePhone": "(323) 555-4702",
"BirthDate": "1987-01-29",
"HireDate": "2012-10-18"
}, {
"ID": 19,
"HeadID": 9,
"FullName": "Antony Remmen",
"Position": "Support Assistant",
"City": "Boise",
"State": "Idaho",
"Email": "anthonyr@dx-email.com",
"Skype": "anthonyr_DX_skype",
"MobilePhone": "(310) 555-6625",
"BirthDate": "1986-02-19",
"HireDate": "2013-01-19"
}, {
"ID": 20,
"HeadID": 8,
"FullName": "Olivia Peyton",
"Position": "Sales Assistant",
"City": "Atlanta",
"State": "Georgia",
"Email": "oliviap@dx-email.com",
"Skype": "oliviap_DX_skype",
"MobilePhone": "(310) 555-2728",
"BirthDate": "1981-06-03",
"HireDate": "2012-05-14"
}, {
"ID": 21,
"HeadID": 6,
"FullName": "Taylor Riley",
"Position": "Network Admin",
"City": "San Jose",
"State": "California",
"Email": "taylorr@dx-email.com",
"Skype": "taylorr_DX_skype",
"MobilePhone": "(310) 555-7276",
"BirthDate": "1982-08-14",
"HireDate": "2012-04-14"
}, {
"ID": 22,
"HeadID": 6,
"FullName": "Amelia Harper",
"Position": "Network Admin",
"City": "Los Angeles",
"State": "California",
"Email": "ameliah@dx-email.com",
"Skype": "ameliah_DX_skype",
"MobilePhone": "(213) 555-4276",
"BirthDate": "1983-11-19",
"HireDate": "2011-02-10"
}, {
"ID": 23,
"HeadID": 6,
"FullName": "Wally Hobbs",
"Position": "Programmer",
"City": "Chatsworth",
"State": "California",
"Email": "wallyh@dx-email.com",
"Skype": "wallyh_DX_skype",
"MobilePhone": "(818) 555-8872",
"BirthDate": "1984-12-24",
"HireDate": "2011-02-17"
}, {
"ID": 24,
"HeadID": 6,
"FullName": "Brad Jameson",
"Position": "Programmer",
"City": "San Fernando",
"State": "California",
"Email": "bradleyj@dx-email.com",
"Skype": "bradleyj_DX_skype",
"MobilePhone": "(818) 555-4646",
"BirthDate": "1988-10-12",
"HireDate": "2011-03-02"
}, {
"ID": 25,
"HeadID": 6,
"FullName": "Karen Goodson",
"Position": "Programmer",
"City": "South Pasadena",
"State": "California",
"Email": "kareng@dx-email.com",
"Skype": "kareng_DX_skype",
"MobilePhone": "(626) 555-0908",
"BirthDate": "1987-04-26",
"HireDate": "2011-03-14"
}, {
"ID": 26,
"HeadID": 5,
"FullName": "Marcus Orbison",
"Position": "Travel Coordinator",
"City": "Los Angeles",
"State": "California",
"Email": "marcuso@dx-email.com",
"Skype": "marcuso_DX_skype",
"MobilePhone": "(213) 555-7098",
"BirthDate": "1982-03-02",
"HireDate": "2005-05-19"
}, {
"ID": 27,
"HeadID": 5,
"FullName": "Sandy Bright",
"Position": "Benefits Coordinator",
"City": "Denver",
"State": "Colorado",
"Email": "sandrab@dx-email.com",
"Skype": "sandrab_DX_skype",
"MobilePhone": "(818) 555-0524",
"BirthDate": "1983-09-11",
"HireDate": "2005-06-04"
}, {
"ID": 28,
"HeadID": 6,
"FullName": "Morgan Kennedy",
"Position": "Graphic Designer",
"City": "San Fernando Valley",
"State": "California",
"Email": "morgank@dx-email.com",
"Skype": "morgank_DX_skype",
"MobilePhone": "(818) 555-8238",
"BirthDate": "1984-07-17",
"HireDate": "2012-01-11"
}, {
"ID": 29,
"HeadID": 28,
"FullName": "Violet Bailey",
"Position": "Jr Graphic Designer",
"City": "La Canada",
"State": "California",
"Email": "violetb@dx-email.com",
"Skype": "violetb_DX_skype",
"MobilePhone": "(818) 555-2478",
"BirthDate": "1985-06-10",
"HireDate": "2012-01-19"
}, {
"ID": 30,
"HeadID": 5,
"FullName": "Ken Samuelson",
"Position": "Ombudsman",
"City": "St. Louis",
"State": "Missouri",
"Email": "kents@dx-email.com",
"Skype": "kents_DX_skype",
"MobilePhone": "(562) 555-9282",
"BirthDate": "1972-09-11",
"HireDate": "2009-04-22"
}];
If you run this code, a TreeList is created with a column for each data field. All the columns have equal widths and the same order as their data fields.
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