Filtering in EJ2 TypeScript Gantt control

2 May 202320 minutes to read

Filtering allows you to view specific or related records based on filter criteria. This can be done in the Gantt control by using the filter menu support and toolbar search support. To enable filtering in the Gantt control, set the allowFiltering to true. Menu filtering support can be configured using the filterSettings property and toolbar searching can be configured using the searchSettings property.

To use filter, inject the Filter module into the Gantt control.

Filter hierarchy modes

The Gantt supports a set of filtering modes with the filterSettings.hierarchyMode property. The following are the types of filter hierarchy modes available in the Gantt control:

  • Parent: This is the default filter hierarchy mode in Gantt. The filtered records are displayed with its parent records. If the filtered records do not have any parent record, then only the filtered records will be displayed.

  • Child: Displays the filtered records with its child record. If the filtered records do not have any child record, then only the filtered records will be displayed.

  • Both: Displays the filtered records with its both parent and child records. If the filtered records do not have any parent and child records, then only the filtered records will be displayed.

  • None: Displays only the filtered records.

import { Gantt, Filter } from '@syncfusion/ej2-gantt';
import { DropDownList, ChangeEventArgs } from '@syncfusion/ej2-dropdowns';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Filter);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    allowFiltering: true
});

gantt.appendTo('#Gantt');

let dropDownMode: DropDownList = new DropDownList({
    dataSource: [
        { id: 'Parent', mode: 'Parent' },
        { id: 'Child', mode: 'Child' },
        { id: 'Both', mode: 'Both' },
        { id: 'None', mode: 'None' },
    ],
    fields: { text: 'mode', value: 'id' },
    value: 'Parent',
    change: (e: ChangeEventArgs) => {
        let mode: any = <string>e.value;
        gantt.filterSettings.hierarchyMode = mode;
        gantt.clearFiltering();
    }
});
dropDownMode.appendTo('#mode');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
       
    <div id='loader'>Loading....</div>
    <div id="container">
        <div>
            <div style="padding-top: 7px; display: inline-block">Hierarchy Mode</div>
            <div style="display: inline-block">
               <input type="text" id="mode">
            </div>
        </div>
        <div id="Gantt"></div>        
    </div>
</body>

</html>

Initial filter

To apply the filter at initial rendering, set the filter to predicate object in the filterSettings.columns property.

import { Gantt, Filter } from '@syncfusion/ej2-gantt';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Filter);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    filterSettings: {
        columns: [{ field: 'TaskName', matchCase: false, operator: 'startswith', predicate: 'and', value: 'Identify' },
        { field: 'TaskID', matchCase: false, operator: 'equal', predicate: 'and', value: 2 }]
    },
    allowFiltering: true
});

gantt.appendTo('#Gantt');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
       
    <div id='loader'>Loading....</div>
    <div id="container">
        <div id="Gantt"></div>        
    </div>
</body>

</html>

Filter operators

The filter operator for a column can be defined in the filterSettings.columns.operator property.

The available operators and its supported data types are:

Operator Description Supported Types
startswith Checks whether the value begins with the specified value. String
endswith Checks whether the value ends with the specified value. String
contains Checks whether the value contains the specified value. String
equal Checks whether the value is equal to the specified value. String | Number | Boolean | Date
notequal Checks for the values that are not equal to the specified value. String | Number | Boolean | Date
greaterthan Checks whether the value is greater than the specified value. Number | Date
greaterthanorequal Checks whether the value is greater than or equal to the specified value. Number | Date
lessthan Checks whether the value is less than the specified value. Number | Date
lessthanorequal Checks whether the value is less than or equal to the specified value. Number | Date

By default, the filterSettings.columns.operator value is equal

Diacritics

By default, the Gantt control ignores the diacritic characters while filtering. To include diacritic characters, set the filterSettings.ignoreAccent to true.

In the following sample, type Perform in the TaskName column to filter diacritic characters.

import { Gantt, Filter } from '@syncfusion/ej2-gantt';

let GanttData: Object[]  = [
    {
        TaskID: 1,
        TaskName: 'Projéct initiàtion',
        StartDate: new Date('04/02/2019'),
        EndDate: new Date('04/21/2019'),
        subtasks: [
            {TaskID: 2, TaskName: 'Identify site locàtion', StartDate: new Date('04/02/2019'), Duration: 0,Progress: 50 },
            {TaskID: 3, TaskName: 'Perförm soil test', StartDate: new Date('04/02/2019'), Duration: 4, Progress: 50 },
            {TaskID: 4, TaskName: 'Soil tëst appröval', StartDate: new Date('04/02/2019'), Duration: 0, Progress: 50 },
        ]
    },
    {
        TaskID: 5,
        TaskName: 'Project estimation',
        StartDate: new Date('04/02/2019'),
        EndDate: new Date('04/21/2019'),
        subtasks: [
            {TaskID: 6, TaskName: 'Develöp floor plan for estimàtion', StartDate: new Date('04/04/2019'),Duration: 3, Progress: 50, resources: [4]},
            {TaskID: 7, TaskName: 'List matërials', StartDate: new Date('04/04/2019'),Duration: 3, Progress: 50},
            {TaskID: 8, TaskName: 'Estimation approval', StartDate: new Date('04/04/2019'),Duration: 0, Progress: 50 }
        ]
    }];

Gantt.Inject(Filter);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    filterSettings: {
        ignoreAccent: true
    },
    allowFiltering: true
});

gantt.appendTo('#Gantt');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
       
    <div id='loader'>Loading....</div>
    <div id="container">
        <div id="Gantt"></div>        
    </div>
</body>

</html>

Filtering a specific column by method

You can filter the columns dynamically by using the filterByColumn method.

import { Gantt, Filter } from '@syncfusion/ej2-gantt';
import { Button } from '@syncfusion/ej2-buttons';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Filter);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    allowFiltering: true
});
gantt.appendTo('#Gantt');

let filterBtn: Button = new Button();
filterBtn.appendTo('#filter');

document.getElementById('filter').addEventListener('click', () => {
    gantt.filterByColumn('TaskName', 'startswith', 'Iden');
});
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
       
    <div id='loader'>Loading....</div>
    <div id='container'>
	                  
        <button id="filter">Filter TaskName column</button>       
        <div id='Gantt'></div>        
    </div>
</body>

</html>

Clear filtered columns

You can clear all the filtering condition done in the Gantt control by using the clearFiltering method.
The following code snippet explains the above behavior.

import { Gantt, Filter } from '@syncfusion/ej2-gantt';
import { Button } from '@syncfusion/ej2-buttons';
import { GanttData } from 'datasource.ts';

Gantt.Inject(Filter);

let gantt: Gantt = new Gantt({
    dataSource: GanttData,
    height: '450px',
    taskFields: {
        id: 'TaskID',
        name: 'TaskName',
        startDate: 'StartDate',
        duration: 'Duration',
        progress: 'Progress',
        child: 'subtasks'
    },
    allowFiltering: true,
    filterSettings: {
        columns: [{ field: 'TaskName', matchCase: false, operator: 'startswith', predicate: 'and', value: 'Identify' },
        { field: 'Progress', matchCase: false, operator: 'equal', predicate: 'and', value: 50 }]
    }
});
gantt.appendTo('#Gantt');

let filterBtn: Button = new Button();
filterBtn.appendTo('#clearFilter');

document.getElementById('clearFilter').addEventListener('click', () => {
    gantt.clearFiltering();
});
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Gantt Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
	<link href="https://cdn.syncfusion.com/ej2/material.css" rel="stylesheet" type="text/css"/>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
       
    <div id='loader'>Loading....</div>
    <div id='container'>
	     <button id="clearFilter">Clear Filter</button>
         <div id='Gantt'></div>        
    </div>
</body>

</html>