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)
| Name | Type | Description |
|---|---|---|
| device | | |
Device parameters. |
| options |
Options to be applied. |
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
DevExpress.ui.dxFileManager.defaultOptions({
device: { deviceType: "desktop" },
options: {
// Here go the FileManager properties
}
});Angular
import FileManager, { Properties } from "devextreme/ui/file_manager";
// ...
export class AppComponent {
constructor () {
FileManager.defaultOptions<Properties>({
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 dxFileManager from "devextreme/ui/file_manager";
import FileManager from "devextreme-react/file-manager";
dxFileManager.defaultOptions({
device: { deviceType: "desktop" },
options: {
// Here go the FileManager properties
}
});
export default function App() {
return (
<div>
<FileManager id="fileManager1" />
<FileManager id="fileManager2" />
</div>
)
}dispose()
jQuery
After calling this method, remove the DOM element associated with the UI component:
$("#myFileManager").dxFileManager("dispose");
$("#myFileManager").remove();Angular
Use conditional rendering instead of this method:
<dx-file-manager ...
*ngIf="condition">
</dx-file-manager>Vue
Use conditional rendering instead of this method:
<template>
<DxFileManager ...
v-if="condition">
</DxFileManager>
</template>
<script>
import DxFileManager from 'devextreme-vue/file-manager';
export default {
components: {
DxFileManager
}
}
</script>React
Use conditional rendering instead of this method:
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;endUpdate()
Refreshes the UI component after a call of the beginUpdate() method.
Main article: beginUpdate()
See Also
getCurrentDirectory()
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)
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
on(eventName, eventHandler)
Use this method to subscribe to one of the events listed in the Events section.
See Also
on(events)
Use this method to subscribe to several events with one method call. Available events are listed in the Events section.
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
var fileManager = $("#fileManagerContainer").dxFileManager("instance");
//...
fileManager.refresh();Angular
import { Component, ViewChild } from '@angular/core';
import { DxFileManagerModule } from "devextreme-angular";
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
@ViewChild(DxFileManagerComponent, { static: false }) fileManager: DxFileManagerComponent;
// Prior to Angular 8
// @ViewChild(DxFileManagerComponent) fileManager: DxFileManagerComponent;
yourCustomMethod() {
this.fileManager.instance.refresh();
// ...
}
}
<dx-file-manager
id="fileManager">
<!-- ... -->
</dx-file-manager>
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { DxFileManagerModule } from 'devextreme-angular';
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
DxFileManagerModule
],
providers: [ ],
bootstrap: [AppComponent]
})
export class AppModule { } Vue
<template>
<DxFileManager
:ref="fileManagerRef">
</DxFileManager>
</template>
<script>
import 'devextreme/dist/css/dx.light.css';
import {
DxFileManager
} from 'devextreme-vue/file-manager';
const fileManagerRef = 'fileManager';
export default {
components: {
DxFileManager
},
data() {
return {
fileManagerRef
}
},
computed: {
fileManager: function() {
return this.$refs[fileManagerRef].instance;
}
},
methods: {
yourCustomMethod(){
this.fileManager.refresh();
// ...
}
}
};
</script>React
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
@(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
@(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)
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
repaint()
The method repaints Toolbar and re-initializes all its items.
See Also
- reload() in DataSource | List
- refresh() in DataGrid | TreeList
If you have technical questions, please create a support ticket in the DevExpress Support Center.