Column Rendering
19 Sep 202424 minutes to read
In Syncfusion Angular Tree Grid, column rendering provides you with the ability to finely control how data is presented. This allows you to manually define columns, automatically generate them, and dynamically customize data presentation. With column rendering, you can ensure that your data is displayed exactly as needed, offering a wide range of possibilities for organizing and showcasing information within the tree grid.
The column definitions are used as the data source schema in the tree grid. The Tree Grid operations, such as sorting, filtering are performed based on column definitions. The field property of tree grid column is necessary to map the datasource values in the tree grid columns.
- If the column
field
is not specified in the dataSource, the column values will be empty.- If the
field
name contains dot operator, it is considered as complex binding.- It is must to define the
field
property for a template column, to perform CRUD or data operations such as filtering, searching etc.
Define columns manually
To define columns manually in tree grid, you can use the e-columns
element to define the columns and represent each column with its respective properties such as field, headerText, type, and width set accordingly. This allows you to customize the column’s behavior and appearance based on the requirements.
Here’s an example code snippet that demonstrates how to define columns manually in the tree grid:
import { NgModule, ViewChild } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { TreeGridModule } from '@syncfusion/ej2-angular-treegrid'
import { PageService, SortService, FilterService } from '@syncfusion/ej2-angular-treegrid'
import { Component, OnInit } from '@angular/core';
import { sampleData } from './datasource';
import { ButtonComponent } from '@syncfusion/ej2-angular-buttons';
import { TreeGridComponent, ReorderService } from '@syncfusion/ej2-angular-treegrid';
@Component({
imports: [TreeGridModule,],
providers: [PageService, SortService, FilterService],
standalone: true,
selector: 'app-container',
template: `<ejs-treegrid #treegrid [dataSource]='data' height='285' [treeColumnIndex]='1' childMapping='subtasks'>
<e-columns>
<e-column field='taskID' headerText='Task ID' textAlign='Right' width=90></e-column>
<e-column field='taskName' headerText='Task Name' textAlign='Left' width=180></e-column>
<e-column field='startDate' headerText='Start Date' textAlign='Right' format='yMd' width=90></e-column>
<e-column field='duration' headerText='Duration' textAlign='Right' width=80></e-column>
<e-column field='progress' headerText='Progress' textAlign='Right' width=120></e-column>
</e-columns>
</ejs-treegrid>`,
})
export class AppComponent implements OnInit {
public data?: Object[];
ngOnInit(): void {
this.data = sampleData;
}
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
Auto generated columns
The Tree Grid automatically generates columns when the column declaration is empty or undefined while initializing the tree grid. All the columns in the dataSource are bound as tree grid columns.
You can use the following code snippet to enable auto-generated columns in the tree grid:
import { NgModule, ViewChild } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { TreeGridModule } from '@syncfusion/ej2-angular-treegrid'
import { PageService, SortService, FilterService } from '@syncfusion/ej2-angular-treegrid'
import { Component, OnInit } from '@angular/core';
import { sampleData } from './datasource';
@Component({
imports: [TreeGridModule,],
standalone: true,
selector: 'app-container',
template: `<ejs-treegrid #treegrid [dataSource]='data' height='250' [treeColumnIndex]='1' childMapping='subtasks'>
</ejs-treegrid>`,
})
export class AppComponent implements OnInit {
public data?: Object[];
ngOnInit(): void {
this.data = sampleData;
}
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
- When the columns are auto-generated, the column type is determined from the first record of the dataSource.
- If you have a large dataset, auto-generating columns can result in performance issues. In this case, it is recommended to specify the columns manually in the columns property during initialization or else use column virtualization feature by setting enableColumnVirtualization property value as true.
Set Primary Key for auto generated columns when editing is enabled
When editing is enabled in the tree grid, you may need to set a primary key for auto-generated columns to uniquely identify each row for operations such as updating or deleting data. This can be achieved using the isPrimaryKey property of the column object by using the dataBound event.
By setting isPrimaryKey
to true for an auto-generated column in the Syncfusion Tree Grid, you can specify it as the primary key column, which uniquely identifies each row when editing is enabled.
Here is an example code snippet that shows how to set a primary key for an auto-generated column when editing is enabled:
import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { TreeGridModule } from '@syncfusion/ej2-angular-treegrid'
import { PageService, SortService, FilterService, EditService } from '@syncfusion/ej2-angular-treegrid'
import { Component, OnInit, ViewChild } from '@angular/core';
import { sampleData } from './datasource';
import { TreeGridComponent, EditSettingsModel, Column, } from '@syncfusion/ej2-angular-treegrid';
@Component({
imports: [TreeGridModule,],
providers: [PageService, SortService, FilterService, EditService],
standalone: true,
selector: 'app-container',
template: `<ejs-treegrid #treegrid [dataSource]='data' height='250' [treeColumnIndex]='1' childMapping='subtasks'
allowPaging='true' [editSettings]='editSettings' (dataBound)="dataBound()">
</ejs-treegrid>`,
})
export class AppComponent implements OnInit {
public data?: Object[];
public editSettings: EditSettingsModel | undefined;
@ViewChild('treegrid')
public treegrid?: TreeGridComponent;
ngOnInit(): void {
this.data = sampleData;
this.editSettings = { allowEditing: true, allowAdding: true, allowDeleting: true };
}
dataBound() {
(((this.treegrid as TreeGridComponent).columns[0]) as Column).isPrimaryKey = true;
}
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
If the column field name is known, the getColumnByField method can be used to retrieve the column object. Then, the isPrimaryKey
property can be set to true for that column, as demonstrated in the code snippet below:
onDataBound(event: any): void {
const column: ColumnModel = this.treegrid.getColumnByField('taskID');
column.isPrimaryKey = true;
}
Set column options to auto generated columns
To configure column options such as type, format and width for auto-generated columns in Syncfusion Tree Grid, you can use the dataBound event of the TreeGrid component. This event is triggered after the data has been bound to the Tree Grid. By handling this event, you can specify the desired column options for the auto-generated columns.
Here’s an example of how you can set column options for auto-generated columns using the dataBound
event:
In the below example, width
is set for taskID column, date type
is set for startDate, endDate column and format
is set for duration, startDate and endDate column.
import { NgModule, ViewChild } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { TreeGridModule } from '@syncfusion/ej2-angular-treegrid'
import { SortService, FilterService } from '@syncfusion/ej2-angular-treegrid'
import { Component, OnInit } from '@angular/core';
import { sampleData } from './datasource';
import { TreeGridComponent, EditSettingsModel, EditService, Column, PageService } from '@syncfusion/ej2-angular-treegrid';
@Component({
imports: [TreeGridModule,],
providers: [PageService, SortService, FilterService],
standalone: true,
selector: 'app-container',
template: `<ejs-treegrid #treegrid [dataSource]='data' height='250' [treeColumnIndex]='1' childMapping='subtasks'
(dataBound)="dataBound()">
</ejs-treegrid>`,
})
export class AppComponent implements OnInit {
public data?: Object[];
@ViewChild('treegrid')
public treegrid?: TreeGridComponent;
ngOnInit(): void {
this.data = sampleData;
}
dataBound() {
for (const cols of (this.treegrid as TreeGridComponent).columns) {
if ((cols as Column).field === 'taskID') {
(cols as Column).width = 120;
}
if ((cols as Column).field === 'startDate') {
(cols as Column).type = 'date';
(cols as Column).format = 'yMd';
}
if ((cols as Column).field === 'endDate') {
(cols as Column).type = 'date';
(cols as Column).format = 'yMd';
}
if ((cols as Column).field === 'duration') {
(cols as Column).format = 'P2';
}
}
(this.treegrid as TreeGridComponent).refreshColumns();
}
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
Dynamic column generation
The Syncfusion TreeGrid component allows you to dynamically generate columns at runtime, based on the data provided. This feature is useful when you need to display data with varying columns based on user requirements or dynamic data sources.
Using ngFor directive
To create dynamically generated columns in the Syncfusion TreeGrid component using the ngFor directive, you will first need to define an array of column objects in your component.ts file. Each column object should include a field and headerText property, which will be used to bind the corresponding properties of the e-column component.
Here is an example for dynamically generate columns in the tree grid using ngFor directive:
import { NgModule, ViewChild } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { CommonModule } from '@angular/common';
import { TreeGridModule } from '@syncfusion/ej2-angular-treegrid'
import { PageService, SortService, FilterService } from '@syncfusion/ej2-angular-treegrid'
import { Component, NgIterable, OnInit, } from '@angular/core';
import { sampleData } from './datasource';
import { ColumnModel } from '@syncfusion/ej2-angular-treegrid';
@Component({
imports: [TreeGridModule, CommonModule],
providers: [PageService, SortService, FilterService],
standalone: true,
selector: 'app-container',
template: `<ejs-treegrid #treegrid [dataSource]='data' height='250' [treeColumnIndex]='1' childMapping='subtasks'>
<e-columns>
<e-column *ngFor="let column of columns" [field]="column.field" [headerText]="column.headerText"></e-column>
</e-columns>
</ejs-treegrid>`,
})
export class AppComponent implements OnInit {
public data?: Object[];
public columns?: NgIterable<ColumnModel> | null | undefined;
ngOnInit(): void {
this.data = sampleData;
this.columns = [
{ field: 'taskID', headerText: 'Task ID', width: 90, textAlign: 'Right' },
{ field: 'taskName', headerText: 'Task Name', width: 180 },
{ field: 'startDate', headerText: 'Start Date', width: 90, textAlign: 'Right', type: 'date', format: 'yMd' },
{ field: 'duration', headerText: 'Duration', width: 80, textAlign: 'Right' }
];
}
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
Using valueAccessor property
Dynamic column generation using value accessor allows you to access and manipulate the display data values in a tree grid column. By using the valueAccessor property of a tree grid column, you can customize the display value of the column based on the data.
To use valueAccessor
property, define the column with the property and provide a function that will return the formatted value. The function receives two arguments:
- field: represents the data field of the column.
- data: represents the data record for the corresponding row.
In the provided code, the currencyFormatter function takes the price value of the data object, appends the Euro symbol to it, and returns the formatted string. The orderFormatter function concatenates the orderName and Category values of the data object and returns the combined string.
import { NgModule, ViewChild } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { TreeGridModule } from '@syncfusion/ej2-angular-treegrid'
import { PageService, SortService, FilterService } from '@syncfusion/ej2-angular-treegrid'
import { Component, OnInit, } from '@angular/core';
import { formatData } from './datasource';
@Component({
imports: [TreeGridModule,],
providers: [PageService, SortService, FilterService],
standalone: true,
selector: 'app-container',
template: `<ejs-treegrid [dataSource]='data' height='250' [treeColumnIndex]='1' childMapping='subtasks' >
<e-columns>
<e-column field='orderID' headerText='Order ID' textAlign='Right' width=90></e-column>
<e-column field='orderName' headerText='Order Name' [valueAccessor]='orderFormatter' textAlign='Left' width=180></e-column>
<e-column field='orderDate' headerText='Order Date' textAlign='Right' width=160 format='yMd'></e-column>
<e-column field='price' headerText='Price' textAlign='Right' [valueAccessor]='currencyFormatter' width=80></e-column>
</e-columns>
</ejs-treegrid>`,
})
export class AppComponent implements OnInit {
public data?: Object[];
ngOnInit(): void {
this.data = formatData;
}
currencyFormatter(field: string, data: Object | any, column: Object): string {
return '€' + data['price'];
}
orderFormatter(field: string, data: Object | any, column: Object): string {
return data[field] + '-' + data['Category'];
}
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
The
valueAccessor
function can have performance implications if it is used to access a large number of data records or to perform complex data manipulations. To avoid performance issues, you can enable the virtualization feature while using the valueAccessor property. This ensures that only the visible rows are rendered, resulting in faster rendering times.
Display array type columns
The TreeGrid component allows you to easily bind an array of objects to a column using the valueAccessor property. This property allows customization of how the data is displayed in the column.
For example, consider a column named Name that contains an array of two objects, FirstName and LastName. The valueAccessor
property can be used to join these two objects and bind them to the column.
This will display the concatenated value of FirstName and LastName in the Name column of the tree grid. Here’s an example of how this can be achieved:
import { NgModule, ViewChild } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { TreeGridModule } from '@syncfusion/ej2-angular-treegrid'
import { PageService, SortService, FilterService } from '@syncfusion/ej2-angular-treegrid'
import { Component, OnInit, } from '@angular/core';
import { stringData } from './datasource';
@Component({
imports: [TreeGridModule,],
providers: [PageService, SortService, FilterService],
standalone: true,
selector: 'app-container',
template: `<ejs-treegrid [dataSource]='data' height='250' [treeColumnIndex]='1' childMapping='subtasks' >
<e-columns>
<e-column field='taskID' headerText='Task ID' textAlign='Right' width=90></e-column>
<e-column field='taskName' headerText='Task Name' textAlign='Left' width=180></e-column>
<e-column field='name' headerText='Full Name' textAlign='Right' [valueAccessor]='orderFormatter' width=90></e-column>
<e-column field='duration' headerText='Duration' textAlign='Right' width=80></e-column>
</e-columns>
</ejs-treegrid>`,
})
export class AppComponent implements OnInit {
public data?: Object[];
ngOnInit(): void {
this.data = stringData;
}
orderFormatter(field: string, data: Object | any, column: Object): string {
return data[field].map(function (s: { lastName: string, firstName: string }): string {
return s.lastName || s.firstName
}).join(' ');
}
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
Since customized values are displayed in the Name column, data operations, such as sorting and fiiltering, cannot be performed for this column.
Expression column
You can achieve an expression column in the Tree Grid by using the valueAccessor property. The valueAccessor
property allows you to define a function that calculates the value for the expression column based on the values of other columns.
In this example, tree grid has columns orderID, orderName, units, and unitprice. An expression column called Total price is added that calculates the total prices for each row based on the values of units and unitprice columns.
import { NgModule, ViewChild } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { TreeGridModule } from '@syncfusion/ej2-angular-treegrid'
import { PageService, SortService, FilterService } from '@syncfusion/ej2-angular-treegrid'
import { Component, OnInit } from '@angular/core';
import { formatData } from './datasource';
@Component({
imports: [TreeGridModule,],
providers: [PageService, SortService, FilterService],
standalone: true,
selector: 'app-container',
template: `<ejs-treegrid #treegrid [dataSource]='data' height='250' [treeColumnIndex]='1' childMapping='subtasks' >
<e-columns>
<e-column field='orderID' headerText='Order ID' textAlign='Right' width=90></e-column>
<e-column field='orderName' headerText='Order Name' textAlign='Left' width=180></e-column>
<e-column field='units' headerText='Units' width=120 textAlign='Right'></e-column>
<e-column field='unitPrice' headerText='Unit Price' width=120 textAlign='Right'></e-column>
<e-column headerText='Total Price' [valueAccessor]='totalPrice' width=120 format='c2' type='number' textAlign='Right'></e-column>
</e-columns>
</ejs-treegrid>`,
})
export class AppComponent implements OnInit {
public data?: Object[];
ngOnInit(): void {
this.data = formatData;
}
totalPrice(field: string, data: { units: number, unitprice: number } | any, column: Object): number {
return data.units * data.unitPrice;
};
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
Since customized values are displayed in the Total Price column, data operations, such as sorting and fiiltering, cannot be performed for this column.
Display serial number
To display serial number in the tree grid for every rows, you can use the rowDataBound event. The rowDataBound
event is triggered for each row in the tree grid when the data is bound to the tree grid.
Within the event handler, the pagesize and currentPage index can be obtained from the tree grid’s pageSettings property. Using these values, the serial number can be calculated based on the page size, current page, and row index. Finally, the calculated serial number can be set as the innerHTML of the corresponding row cell.
Here is an example code snippet that demonstrates how to display serial numbers in a tree grid using rowDataBound
event:
import { NgModule, ViewChild } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { TreeGridModule } from '@syncfusion/ej2-angular-treegrid'
import { PageService, SortService, FilterService } from '@syncfusion/ej2-angular-treegrid'
import { Component, OnInit } from '@angular/core';
import { projectData } from './datasource';
import { PageSettingsModel, TreeGridComponent } from '@syncfusion/ej2-angular-treegrid';
@Component({
imports: [TreeGridModule,],
providers: [PageService, SortService, FilterService],
standalone: true,
selector: 'app-container',
template: `<ejs-treegrid #treegrid [dataSource]='data' [treeColumnIndex]='1' parentIdMapping='parentID' idMapping='TaskID' height=265 allowPaging="true" [pageSettings]="pageSettings" (rowDataBound)='rowDataBound($event)'>
<e-columns>
<e-column field='S.No' textAlign='Center' width=120></e-column>
<e-column field='TaskName' headerText='Task Name' width='170'></e-column>
<e-column field='StartDate' headerText='Start Date' width='130' format="yMd" textAlign='Right'></e-column>
<e-column field='Duration' headerText='Duration' width='80' textAlign='Right'></e-column>
</e-columns>
</ejs-treegrid>`,
})
export class AppComponent implements OnInit {
public data?: Object[];
@ViewChild('treegrid')
public treegrid?: TreeGridComponent;
public pageSettings?: PageSettingsModel;
ngOnInit(): void {
this.data = projectData;
this.pageSettings = { pageSize: 8 };
}
rowDataBound({ row }: any) {
if (row) {
var rowIndex = parseInt(row.getAttribute('aria-rowIndex') as string);
var currentPageNumber = (this.treegrid as TreeGridComponent).grid
.pageSettings.currentPage;
var pageSize = (this.treegrid as TreeGridComponent).pageSettings.pageSize;
var startIndex =
((currentPageNumber as number) - 1) * (pageSize as number);
(row.querySelector('.e-rowcell') as Element).innerHTML = (
startIndex + rowIndex
).toString();
}
}
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
Since customized values are displayed in the S.No column, data operations, such as sorting and fiiltering, cannot be performed for this column.
Complex data binding
The Syncfusion TreeGrid component allows you to achieve complex data binding by using the dot (.) operator in the column.field. This feature is particularly useful when dealing with nested or complex data structures.
Using local data
To enable complex data binding in the TreeGrid component using local data, use the dot (.) operator in the field
property of the column. Here is an example of how to achieve complex data binding using local data:
In the below example, we have bound the nested Task object’s firstName and lastName properties using the dot (.) operator.
import { NgModule, ViewChild } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { TreeGridModule } from '@syncfusion/ej2-angular-treegrid'
import { PageService, SortService, FilterService } from '@syncfusion/ej2-angular-treegrid'
import { Component, OnInit } from '@angular/core';
import { complexData } from './datasource';
@Component({
imports: [TreeGridModule,],
providers: [PageService, SortService, FilterService],
standalone: true,
selector: 'app-container',
template: `<ejs-treegrid [dataSource]='data' height='250' [treeColumnIndex]='1' childMapping='subtasks' >
<e-columns>
<e-column field='taskID' headerText='Task ID' textAlign='Right' width=90></e-column>
<e-column field='taskName' headerText='Task Name' textAlign='Left' width=180></e-column>
<e-column field='assignee.firstName' headerText='Assignee' textAlign='Right' width=90></e-column>
<e-column field='duration' headerText='Duration' textAlign='Right' width=80></e-column>
</e-columns>
</ejs-treegrid>`
})
export class AppComponent implements OnInit {
public data?: Object[];
ngOnInit(): void {
this.data = complexData;
}
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
Since customized values are displayed in the column, data operations, such as sorting and fiiltering, cannot be performed for this column.
Using remote data
To enable complex data binding in the TreeGrid component using remote data, add the expand query to the query property of the Tree Grid, to eager load the complex data. Here is an example of how to achieve complex data binding using remote data:
In the below example, we have used the expand
query to load the nested Tasks object’s Name property using the dot (.) operator.
import { Component } from '@angular/core';
import { DataManager, Query, UrlAdaptor } from '@syncfusion/ej2-data';
@Component({
selector: 'app-root',
template: `
<ejs-treegrid [dataSource]='data' [query]="query" [treeColumnIndex]='1' height='400' idMapping='TaskID' parentIdMapping='ParentValue' hasChildMapping='isParent' [allowPaging]="true" [pageSettings]="pagesettings" >
<e-columns>
<e-column field='TaskID' headerText='Task ID' width='90' textAlign='Right'></e-column>
<e-column field='TaskName' headerText='Task Name' width='180'></e-column>
<e-column field='Duration' headerText='Duration' width='80' textAlign='Right'></e-column>
<e-column field='Tasks.Name' headerText='Name' width='100' textAlign='Right'></e-column>
</e-columns>
</ejs-treegrid>
`,
})
export class AppComponent {
public data: DataManager = new DataManager({
adaptor: new UrlAdaptor,
url: "Home/Datasource",
});
public query?: Query = new Query().expand('Tasks');
public pagesettings = { pageSize: 12, pageSizeMode: 'Root' };
}
The following code example describes handling of server end.
public ActionResult DataSource(DataManagerRequest dm)
{
List<TreeData> data = new List<TreeData>();
data = TreeData.GetTree();
DataOperations operation = new DataOperations();
IEnumerable<TreeData> DataSource = data;
if (!(dm.Where != null && dm.Where.Count > 1))
{
data = data.Where(p => p.ParentValue == null).ToList();
}
DataSource = data;
if (dm.Search != null && dm.Search.Count > 0) // Searching
{
DataSource = operation.PerformSearching(DataSource, dm.Search);
}
if (dm.Sorted != null && dm.Sorted.Count > 0 && dm.Sorted[0].Name != null) // Sorting
{
DataSource = operation.PerformSorting(DataSource, dm.Sorted);
}
if (dm.Where != null && dm.Where.Count > 1) //filtering
{
DataSource = operation.PerformFiltering(DataSource, dm.Where, "and");
}
int count = data.Count;
DataSource = data;
if (dm.Skip != 0)
{
DataSource = operation.PerformSkip(DataSource, dm.Skip); //Paging
}
if (dm.Take != 0)
{
DataSource = operation.PerformTake(DataSource, dm.Take);
}
return dm.RequiresCounts ? Json(new { result = DataSource, count = count }) : Json(DataSource);
}
View the complex data binding with remote data sample on GitHub
Complex data binding with list of array of objects
The Syncfusion TreeGrid component supports complex data binding with lists of arrays of objects. This feature allows you to bind complex data with multiple levels of nested objects and arrays to the tree grid.
The following example shows how to set complex field for datasource having array of objects.
import { NgModule, ViewChild } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'
import { TreeGridModule } from '@syncfusion/ej2-angular-treegrid'
import { PageService, SortService, FilterService } from '@syncfusion/ej2-angular-treegrid'
import { Component, OnInit } from '@angular/core';
import { complexData } from './datasource';
@Component({
imports: [TreeGridModule,],
providers: [PageService, SortService, FilterService],
standalone: true,
selector: 'app-container',
template: `<ejs-treegrid [dataSource]='data' height='250' [treeColumnIndex]='1' childMapping='subtasks' >
<e-columns>
<e-column field='taskID' headerText='Task ID' textAlign='Right' width=90></e-column>
<e-column field='taskName' headerText='Task Name' textAlign='Left' width=180></e-column>
<e-column field='assignee.0.firstName' headerText='Assignee' textAlign='Right' width=90></e-column>
<e-column field='duration' headerText='Duration' textAlign='Right' width=80></e-column>
</e-columns>
</ejs-treegrid>`
})
export class AppComponent implements OnInit {
public data?: Object[];
ngOnInit(): void {
this.data = complexData;
}
}
import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import 'zone.js';
bootstrapApplication(AppComponent).catch((err) => console.error(err));
Since customized values are displayed in the column, data operations, such as sorting and fiiltering, cannot be performed for this column.