You can able to restrict to drag and drop files under folder only. These can be achieved by using ‘nodeDragStop’ and ‘nodeDragging’ event of TreeView.
import * as ReactDOM from 'react-dom';
import * as React from 'react';
import { TreeViewComponent } from '@syncfusion/ej2-react-navigations';
import { enableRipple } from '@syncfusion/ej2-base';
enableRipple(true);
export default class App extends React.Component {
constructor() {
super(...arguments);
// Hierarchical data source for TreeView component
this.hierarchicalData = [
{
nodeId: '01', nodeText: 'Music', icon: 'folder',
nodeChild: [
{ nodeId: '01-01', nodeText: 'Gouttes.mp3', icon: 'audio' }
]
},
{
nodeId: '02', nodeText: 'Videos', icon: 'folder',
nodeChild: [
{ nodeId: '02-01', nodeText: 'Naturals.mp4', icon: 'video' },
{ nodeId: '02-02', nodeText: 'Wild.mpeg', icon: 'video' },
]
},
{
nodeId: '03', nodeText: 'Documents', icon: 'folder',
nodeChild: [
{ nodeId: '03-01', nodeText: 'Environment Pollution.docx', icon: 'docx' },
{ nodeId: '03-02', nodeText: 'Global Water, Sanitation, & Hygiene.docx', icon: 'docx' },
{ nodeId: '03-03', nodeText: 'Global Warming.ppt', icon: 'ppt' },
{ nodeId: '03-04', nodeText: 'Social Network.pdf', icon: 'pdf' },
{ nodeId: '03-05', nodeText: 'Youth Empowerment.pdf', icon: 'pdf' },
]
},
{
nodeId: '04', nodeText: 'Pictures', icon: 'folder', expanded: true,
nodeChild: [
{
nodeId: '04-01', nodeText: 'Camera Roll', icon: 'folder', expanded: true,
nodeChild: [
{ nodeId: '04-01-01', nodeText: 'WIN_20160726_094117.JPG', image: 'https://ej2.syncfusion.com/demos/src/treeview/images/employees/9.png' },
{ nodeId: '04-01-02', nodeText: 'WIN_20160726_094118.JPG', image: 'https://ej2.syncfusion.com/demos/src/treeview/images/employees/3.png' },
]
},
{ nodeId: '04-02', nodeText: 'Wind.jpg', icon: 'images' },
{ nodeId: '04-03', nodeText: 'Stone.jpg', icon: 'images' },
]
},
{
nodeId: '05', nodeText: 'Downloads', icon: 'folder',
nodeChild: [
{ nodeId: '05-01', nodeText: 'UI-Guide.pdf', icon: 'pdf' },
{ nodeId: '05-02', nodeText: 'Tutorials.zip', icon: 'zip' },
{ nodeId: '05-03', nodeText: 'Game.exe', icon: 'exe' },
{ nodeId: '05-04', nodeText: 'TypeScript.7z', icon: 'zip' },
]
}
];
this.fields = { dataSource: this.hierarchicalData, id: 'nodeId', text: 'nodeText', child: 'nodeChild', iconCss: 'icon', imageUrl: 'image' };
this.allowDragAndDrop = true;
this.sortOrder = 'Ascending';
}
nodeDrag(args) {
if (args.droppedNode != null && args.droppedNode.getElementsByClassName('folder') && args.droppedNode.getElementsByClassName('folder').length === 0) {
args.dropIndicator = 'e-no-drop';
}
}
dragStop(args) {
if (args.droppedNode != null && args.droppedNode.getElementsByClassName('folder') && args.droppedNode.getElementsByClassName('folder').length === 0) {
args.cancel = true;
}
}
render() {
return (<div className='control-pane'>
<div className='control-section'>
<div className='control_wrapper'>
<TreeViewComponent fields={this.fields} allowDragAndDrop={this.allowDragAndDrop} nodeDragStop={this.dragStop.bind(this)} nodeDragging={this.nodeDrag.bind(this)}/>
</div>
</div>
</div>);
}
}
ReactDOM.render(<App />, document.getElementById('sample'));
#loader {
color: #008cff;
height: 40px;
left: 45%;
position: absolute;
top: 45%;
width: 30%;
}
#treeparent {
display: block;
max-width: 350px;
max-height: 350px;
margin: auto;
overflow: auto;
border: 1px solid #dddddd;
border-radius: 3px;
}
#display {
max-width: 500px;
margin: auto;
padding: 10px;
}
import * as ReactDOM from 'react-dom';
import * as React from 'react';
import {TreeViewComponent, DragAndDropEventArgs} from '@syncfusion/ej2-react-navigations';
import {enableRipple} from '@syncfusion/ej2-base';
enableRipple(true);
export default class App extends React.Component<{}, {}> {
// Hierarchical data source for TreeView component
public hierarchicalData: { [key: string]: Object }[] = [
{
nodeId: '01', nodeText: 'Music', icon: 'folder',
nodeChild: [
{ nodeId: '01-01', nodeText: 'Gouttes.mp3', icon: 'audio' }
]
},
{
nodeId: '02', nodeText: 'Videos', icon: 'folder',
nodeChild: [
{ nodeId: '02-01', nodeText: 'Naturals.mp4', icon: 'video' },
{ nodeId: '02-02', nodeText: 'Wild.mpeg', icon: 'video' },
]
},
{
nodeId: '03', nodeText: 'Documents', icon: 'folder',
nodeChild: [
{ nodeId: '03-01', nodeText: 'Environment Pollution.docx', icon: 'docx' },
{ nodeId: '03-02', nodeText: 'Global Water, Sanitation, & Hygiene.docx', icon: 'docx' },
{ nodeId: '03-03', nodeText: 'Global Warming.ppt', icon: 'ppt' },
{ nodeId: '03-04', nodeText: 'Social Network.pdf', icon: 'pdf' },
{ nodeId: '03-05', nodeText: 'Youth Empowerment.pdf', icon: 'pdf' },
]
},
{
nodeId: '04', nodeText: 'Pictures', icon: 'folder', expanded: true,
nodeChild: [
{
nodeId: '04-01', nodeText: 'Camera Roll', icon: 'folder', expanded: true,
nodeChild: [
{ nodeId: '04-01-01', nodeText: 'WIN_20160726_094117.JPG', image: 'https://ej2.syncfusion.com/demos/src/treeview/images/employees/9.png' },
{ nodeId: '04-01-02', nodeText: 'WIN_20160726_094118.JPG', image: 'https://ej2.syncfusion.com/demos/src/treeview/images/employees/3.png' },
]
},
{ nodeId: '04-02', nodeText: 'Wind.jpg', icon: 'images' },
{ nodeId: '04-03', nodeText: 'Stone.jpg', icon: 'images' },
]
},
{
nodeId: '05', nodeText: 'Downloads', icon: 'folder',
nodeChild: [
{ nodeId: '05-01', nodeText: 'UI-Guide.pdf', icon: 'pdf' },
{ nodeId: '05-02', nodeText: 'Tutorials.zip', icon: 'zip' },
{ nodeId: '05-03', nodeText: 'Game.exe', icon: 'exe' },
{ nodeId: '05-04', nodeText: 'TypeScript.7z', icon: 'zip' },
]
}
];
private fields: Object = { dataSource: this.hierarchicalData, id: 'nodeId', text: 'nodeText', child: 'nodeChild', iconCss: 'icon', imageUrl: 'image' };
private allowDragAndDrop: boolean = true;
private sortOrder: string = 'Ascending';
nodeDrag(args: DragAndDropEventArgs): void {
if (args.droppedNode != null && args.droppedNode.getElementsByClassName('folder') && args.droppedNode.getElementsByClassName('folder').length === 0) {
args.dropIndicator = 'e-no-drop';
}
}
dragStop(args: DragAndDropEventArgs): void {
if (args.droppedNode != null && args.droppedNode.getElementsByClassName('folder') && args.droppedNode.getElementsByClassName('folder').length === 0) {
args.cancel = true;
}
}
render() {
return (
<div className = 'control-pane'>
<div className='control-section'>
<div className='control_wrapper'>
{/* Render TreeView */}
<TreeViewComponent fields={this.fields} allowDragAndDrop={this.allowDragAndDrop} nodeDragStop={this.dragStop.bind(this)} nodeDragging={this.nodeDrag.bind(this)}/>
</div>
</div>
</div>
)
}
}
ReactDOM.render(<App />, document.getElementById('sample'));