JavaScript/jQuery FileManager Methods
beginUpdate()
Prevents the UI component from refreshing until the endUpdate() method is called.
The beginUpdate() and endUpdate() methods prevent the UI component from excessive updates when you are changing multiple UI component settings at once. After the beginUpdate() method is called, the UI component does not update its UI until the endUpdate() method is called.
See Also
defaultOptions(rule)
Parameters:
rule:
Object structure:
defaultOptions is a static method that the UI component class supports. The following code demonstrates how to specify default properties for all instances of the FileManager UI component in an application executed on the desktop.
jQuery
JavaScript
DevExpress.ui.dxFileManager.defaultOptions({
device: { deviceType: "desktop" },
options: {
// Here go the FileManager properties
}
});Angular
TypeScript
import FileManager from "devextreme/ui/file_manager";
// ...
export class AppComponent {
constructor () {
FileManager.defaultOptions({
device: { deviceType: "desktop" },
options: {
// Here go the FileManager properties
}
});
}
}Vue
<template>
<div>
<DxFileManager id="fileManager1" />
<DxFileManager id="fileManager2" />
</div>
</template>
<script>
import DxFileManager from "devextreme-vue/file-manager";
import FileManager from "devextreme/ui/file_manager";
FileManager.defaultOptions({
device: { deviceType: "desktop" },
options: {
// Here go the FileManager properties
}
});
export default {
components: {
DxFileManager
}
}
</script>React
import React, {useEffect} from "react";
import dxFileManager from "devextreme/ui/file_manager";
import FileManager from "devextreme-react/file-manager";
export default function App() {
useEffect(() => {
dxFileManager.defaultOptions({
device: { deviceType: "desktop" },
options: {
// Here go the FileManager properties
}
})
});
return (
<div>
<FileManager id="fileManager1" />
<FileManager id="fileManager2" />
</div>
)
}dispose()
After calling this method, remove the DOM element associated with the UI component:
JavaScript
$("#myFileManager").dxFileManager("dispose");
$("#myFileManager").remove();Use this method only if the UI component was created with jQuery or pure JavaScript. In Angular, Vue, and React, use conditional rendering:
Angular
app.component.html
<dx-file-manager ...
*ngIf="condition">
</dx-file-manager>Vue
App.vue
<template>
<DxFileManager ...
v-if="condition">
</DxFileManager>
</template>
<script>
import DxFileManager from 'devextreme-vue/file-manager';
export default {
components: {
DxFileManager
}
}
</script>React
App.js
import React from 'react';
import FileManager from 'devextreme-react/file-manager';
function DxFileManager(props) {
if (!props.shouldRender) {
return null;
}
return (
<FileManager ... >
</FileManager>
);
}
class App extends React.Component {
render() {
return (
<DxFileManager shouldRender="condition" />
);
}
}
export default App;See Also
getCurrentDirectory()
Return Value:
This method returns the following FileManager item's parameters:
- pathInfo: Array<Object> - Information about the item's path.
- parentPath: string - The item's parent path.
- key: string - The item's key.
- relativeName: string - The item's relative name.
- isDirectory: boolean - The item's type (file or directory).
- isRoot: boolean - The directory type (standard or root).
- size: number - The item size.
- dateModified: Date - The item's modified date.
- thumbnail: string - The item's thumbnail URL.
- tooltipText: string - The item's tooltip text.
getInstance(element)
Return Value:
getInstance is a static method that the UI component class supports. The following code demonstrates how to get the FileManager instance found in an element with the myFileManager ID:
// Modular approach
import FileManager from "devextreme/ui/file_manager";
...
let element = document.getElementById("myFileManager");
let instance = FileManager.getInstance(element) as FileManager;
// Non-modular approach
let element = document.getElementById("myFileManager");
let instance = DevExpress.ui.dxFileManager.getInstance(element);See Also
refresh()
A Promise that is resolved after data is loaded. It is a native Promise or a jQuery.Promise when you use jQuery.
The following example illustrates how to use this method:
jQuery
index.js
var fileManager = $("#fileManagerContainer").dxFileManager("instance");
//...
fileManager.refresh();Angular
app.component.ts
app.component.html
app.module.ts
import { Component, ViewChild } from '@angular/core';
import { DxFileManagerModule } from "devextreme-angular";
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
@ViewChild(DxFileManagerComponent, { static: false }) fileManager: DxFileManagerComponent;
// Prior to Angular 8
// @ViewChild(DxFileManagerComponent) fileManager: DxFileManagerComponent;
yourCustomMethod() {
this.fileManager.instance.refresh();
// ...
}
}
<dx-file-manager
id="fileManager">
<!-- ... -->
</dx-file-manager>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileManagerModule } from 'devextreme-angular';
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
DxFileManagerModule
],
providers: [ ],
bootstrap: [AppComponent]
})
export class AppModule { } Vue
App.vue
<template>
<DxFileManager
:ref="fileManagerRef">
</DxFileManager>
</template>
<script>
import 'devextreme/dist/css/dx.light.css';
import {
DxFileManager
} from 'devextreme-vue/file-manager';
const fileManagerRef = 'fileManager';
export default {
components: {
DxFileManager
},
data() {
return {
fileManagerRef
}
},
computed: {
fileManager: function() {
return this.$refs[fileManagerRef].instance;
}
},
methods: {
yourCustomMethod(){
this.fileManager.refresh();
// ...
}
}
};
</script>React
App.js
import React from 'react';
import 'devextreme/dist/css/dx.light.css';
import FileManager from 'devextreme-react/file-manager';
class App extends React.Component {
constructor(props) {
super(props);
this.fileManagerRef = React.createRef();
this.yourCustomMethod = () => {
this.fileManager.refresh();
// ...
}
}
get fileManager() {
return this.fileManagerRef.current.instance;
}
render() {
return (
<FileManager
ref={this.fileManagerRef} >
</FileManager>
);
}
}
export default App;ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().FileManager()
.ID("fileManager")
// ...
)
<script type="text/javascript">
function getFileManagerInstance() {
return $("#fileManager").dxFileManager("instance");
}
function yourCustomMethod() {
var fileManagerInstance = getFileManagerInstance();
fileManagerInstance.refresh();
// ...
}
</script>ASP.NET Core Controls
Razor C#
@(Html.DevExtreme().FileManager()
.ID("fileManager")
// ...
)
<script type="text/javascript">
function getFileManagerInstance() {
return $("#fileManager").dxFileManager("instance");
}
function yourCustomMethod() {
var fileManagerInstance = getFileManagerInstance();
fileManagerInstance.refresh();
// ...
}
</script>registerKeyHandler(key, handler)
Parameters:
key:
handler:
A handler. Accepts the keydown event as the argument. It is a EventObject or a jQuery.Event when you use jQuery.
The key argument accepts one of the following values:
- "backspace"
- "tab"
- "enter"
- "escape"
- "pageUp"
- "pageDown"
- "end"
- "home"
- "leftArrow"
- "upArrow"
- "rightArrow"
- "downArrow"
- "del"
- "space"
- "F"
- "A"
- "asterisk"
- "minus"
A custom handler for a key cancels the default handler for this key.
See Also
Feedback