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Deleting Tasks in React Gantt component

02 Dec 2022 / 2 minutes to read

A task delete option in the Gantt component can be enabled by enabling the ediSettings.allowDeleting property. Tasks can be deleted by clicking the delete toolbar item or using the deleteRow method. You can call this method dynamically on any custom actions like button click. The following code example shows how to enable the delete option in the Gantt component.

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index.jsx
index.html
index.tsx
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import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { ButtonComponent } from '@syncfusion/ej2-react-buttons';
import { GanttComponent, Inject, Edit, Selection } from '@syncfusion/ej2-react-gantt';
import { data } from './datasource';
class App extends React.Component {
    constructor() {
        super(...arguments);
        this.taskFields = {
            id: 'TaskID',
            name: 'TaskName',
            startDate: 'StartDate',
            duration: 'Duration',
            progress: 'Progress',
            child: 'subtasks'
        };
        this.editOptions = {
            allowDeleting: true
        };
    }
    clickHandler() {
        this.ganttInstance.editModule.deleteRow();
    }
    render() {
        return (<div>
        <ButtonComponent onClick={this.clickHandler.bind(this)}>Task Delete</ButtonComponent>
        <GanttComponent dataSource={data} ref={gantt => this.ganttInstance = gantt} taskFields={this.taskFields} allowSelection={true} editSettings={this.editOptions} height='450px'>
            <Inject services={[Edit, Selection]}/>
        </GanttComponent></div>);
    }
}
;
ReactDOM.render(<App />, document.getElementById('root'));
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<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion React Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 for React Components" />
    <meta name="author" content="Syncfusion" />
    <link href="https://cdn.syncfusion.com/ej2/20.3.56/material.css" rel="stylesheet" type="text/css"/>
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
     <style>
        #loader {
            color: #008cff;
            height: 40px;
            left: 45%;
            position: absolute;
            top: 45%;
            width: 30%;
        }
    </style>
</head>

<body>
        <div id='root'>
            <div id='loader'>Loading....</div>
        </div>
</body>

</html>
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import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { ButtonComponent } from '@syncfusion/ej2-react-buttons';
import { GanttComponent, Inject, Edit, EditSettingsModel, Selection } from '@syncfusion/ej2-react-gantt';
import { data } from './datasource';
class App extends React.Component<{}, {}>{
    public taskFields: any = {
    id: 'TaskID',
    name: 'TaskName',
    startDate: 'StartDate',
    duration: 'Duration',
    progress: 'Progress',
    child: 'subtasks'
  };
  private ganttInstance:any;
  public editOptions: EditSettingsModel = {
      allowDeleting: true
  };
  public clickHandler(){
     this.ganttInstance.editModule.deleteRow();
}
    render() {
        return (<div>
        <ButtonComponent onClick= { this.clickHandler.bind(this)}>Task Delete</ButtonComponent>
        <GanttComponent dataSource={data}  ref={gantt => this.ganttInstance = gantt}  taskFields={this.taskFields} allowSelection={true}
        editSettings={this.editOptions} height = '450px'>
            <Inject services={[Edit, Selection]} />
        </GanttComponent></div>)
    }
};
ReactDOM.render(<App />, document.getElementById('root'));

NOTE: You should select any one of the rows in the Gantt component to perform task delete action. You should set the allowDeleting value to true to delete the record dynamically.

Delete confirmation message

Delete confirmation message is used to get the confirmation from users before deleting a task. This confirmation message can be enabled by setting the editSettings.showDeleteConfirmDialog property to true.

The following code snippet explains how to enable the delete confirmation message in Gantt.

Source
Preview
index.jsx
index.html
index.tsx
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import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { GanttComponent, Inject, Edit, Selection, Toolbar } from '@syncfusion/ej2-react-gantt';
import { data } from './datasource';
class App extends React.Component {
    constructor() {
        super(...arguments);
        this.taskFields = {
            id: 'TaskID',
            name: 'TaskName',
            startDate: 'StartDate',
            duration: 'Duration',
            progress: 'Progress',
            child: 'subtasks'
        };
        this.editOptions = {
            allowDeleting: true,
            showDeleteConfirmDialog: true
        };
        this.toolbar = ['Delete'];
    }
    render() {
        return <GanttComponent dataSource={data} taskFields={this.taskFields} allowSelection={true} editSettings={this.editOptions} toolbar={this.toolbar} height='450px'>
            <Inject services={[Edit, Selection, Toolbar]}/>
        </GanttComponent>;
    }
}
;
ReactDOM.render(<App />, document.getElementById('root'));
Copied to clipboard
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion React Gantt</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 for React Components" />
    <meta name="author" content="Syncfusion" />
    <link href="https://cdn.syncfusion.com/ej2/20.3.56/material.css" rel="stylesheet" type="text/css"/>
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
     <style>
        #loader {
            color: #008cff;
            height: 40px;
            left: 45%;
            position: absolute;
            top: 45%;
            width: 30%;
        }
    </style>
</head>

<body>
        <div id='root'>
            <div id='loader'>Loading....</div>
        </div>
</body>

</html>
Copied to clipboard
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { GanttComponent, Inject, Edit, EditSettingsModel,Selection, Toolbar, ToolbarItem } from '@syncfusion/ej2-react-gantt';
import { data } from './datasource';
class App extends React.Component<{}, {}>{
    public taskFields: any = {
    id: 'TaskID',
    name: 'TaskName',
    startDate: 'StartDate',
    duration: 'Duration',
    progress: 'Progress',
    child: 'subtasks'
  };
  public editOptions: EditSettingsModel = {
      allowDeleting: true,
      showDeleteConfirmDialog: true
  };
  public toolbar: ToolbarItem[] = ['Delete'];
    render() {
        return <GanttComponent dataSource={data} taskFields={this.taskFields} allowSelection={true}
        editSettings={this.editOptions} toolbar={this.toolbar} height = '450px'>
            <Inject services={[Edit, Selection, Toolbar]} />
        </GanttComponent>
    }
};
ReactDOM.render(<App />, document.getElementById('root'));