The uploader component validate the selected files extension and size using the allowedExtentions,
minFileSize and maxFileSizeproperties.
The files can be validated before uploading to the server and can be ignored on uploading.
Also, you can validate the files by setting the HTML attributes to the original input element.
The validation process occurs on drag-and-drop the files also.
You can allow the specific types of files alone to upload using the allowedExtentions property.
The extension can be represented as collection by comma separators. The uploader component
filters the selected or dropped files matched against the specified file types and processes the
upload operation. The validation happens when you specify value to inline attribute accept to original input element.
import { Component } from '@angular/core';
@Component({
selector: 'app-root',
template: `
<ejs-uploader #defaultupload [asyncSettings]='path' allowedExtensions = '.jpg,.png'></ejs-uploader>
`
})
export class AppComponent {
public path: Object = {
saveUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Save',
removeUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Remove' };
constructor() {
}
}import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { UploaderModule } from '@syncfusion/ej2-angular-inputs';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, UploaderModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule {
}import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);The uploader component allows you to validate the files based on its size.
The validation helps to restrict uploading large files or empty files to the server. The size can be represented in bytes.
By default, the uploader component allows you to upload minimum file size as 0 byte and
maximum file size as 28.4 MB using using minFileSize and maxFileSize properties.
import { Component } from '@angular/core';
@Component({
selector: 'app-root',
template: `
<ejs-uploader #defaultupload [asyncSettings]='path' minFileSize = 10000 maxFileSize = 1500000></ejs-uploader>
`
})
export class AppComponent {
public path: Object = {
saveUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Save',
removeUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Remove' };
constructor() {
}
}import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { UploaderModule } from '@syncfusion/ej2-angular-inputs';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, UploaderModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule {
}import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);You can restrict uploading the maximum number of files using the selected event. In the selected event arguments,
you can get the currently selected files details using the getFilesData().
You can modify the files details and assign the modified file list to the eventArgs.modifiedFilesData.
import { Component, ViewChild } from '@angular/core';
import { FileInfo, SelectedEventArgs } from '@syncfusion/ej2-inputs';
import { detach } from '@syncfusion/ej2-base';
import { createSpinner, showSpinner, hideSpinner } from '@syncfusion/ej2-popups';
@Component({
selector: 'app-root',
template: `
<ejs-uploader #defaultupload autoUpload='false' [asyncSettings]='path' minFileSize = 10000 allowedExtensions = '.doc, .docx, .xls, .xlsx' (selected)="onFileSelected($event)" (success)="onUploadSuccess($event)"></ejs-uploader>
`
})
export class AppComponent {
public path: Object = {
saveUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Save',
removeUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Remove' };
@ViewChild('defaultupload')
public uploadObj: UploaderComponent;
public onFileSelected(args : SelectedEventArgs) : void {
// Filter the 5 files only to showcase
args.filesData.splice(5);
let filesData : FileInfo[] = this.uploadObj.getFilesData();
let allFiles : FileInfo[] = filesData.concat(args.filesData);
if (allFiles.length > 5) {
for (let i : number = 0; i < allFiles.length; i++) {
if (allFiles.length > 5) {
allFiles.shift();
}
}
args.filesData = allFiles;
// set the modified custom data
args.modifiedFilesData = args.filesData;
}
args.isModified = true;
}
public onUploadSuccess(args: any): void {
let li: HTMLElement = this.uploadObj.uploadWrapper.querySelector('[data-file-name="' + args.file.name + '"]');
if (args.operation === 'upload') {
(li.querySelector('.e-file-delete-btn') as HTMLElement).onclick = () => {
this.generateSpinner(this.uploadObj.uploadWrapper);
};
(li.querySelector('.e-file-delete-btn') as HTMLElement).onkeydown = (e: any) => {
if (e.keyCode === 13) {
this.generateSpinner(e.target.closest('.e-upload'));
}
};
} else {
hideSpinner(this.uploadObj.uploadWrapper);
detach(this.uploadObj.uploadWrapper.querySelector('.e-spinner-pane'));
}
}
public generateSpinner(targetElement: HTMLElement): void {
createSpinner({ target: targetElement, width: '25px' });
showSpinner(targetElement);
}
constructor() {
}
}import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { UploaderModule } from '@syncfusion/ej2-angular-inputs';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, UploaderModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule {
}import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);You can validate the duplicate files before uploading to server using the selected event. Compare the selected files with the existing files data and filter the file list by removing the duplicate files.
import { Component, ViewChild } from '@angular/core';
import { FileInfo } from '@syncfusion/ej2-inputs';
import { isNullOrUndefined } from '@syncfusion/ej2-base';
@Component({
selector: 'app-root',
template: `
<ejs-uploader #defaultupload autoUpload='false' [asyncSettings]='path' (selected)="onFileSelect($event)" ></ejs-uploader>
`
})
export class AppComponent {
public path: Object = {
saveUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Save',
removeUrl: 'https://ej2.syncfusion.com/services/api/uploadbox/Remove' };
@ViewChild('defaultupload')
public uploadObj: UploaderComponent;
public onFileSelect(args : any) {
let existingFiles: FileInfo[] = this.uploadObj.getFilesData();
for (let i: number = 0; i < args.filesData.length; i++) {
for(let j: number = 0; j < existingFiles.length; j++) {
if (!isNullOrUndefined(args.filesData[i])) {
if (existingFiles[j].name == args.filesData[i].name) {
args.filesData.splice(i, 1);
}
}
}
}
existingFiles = existingFiles.concat(args.filesData);
args.modifiedFilesData = existingFiles;
args.isModified = true;
}
constructor() {
}
}import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { UploaderModule } from '@syncfusion/ej2-angular-inputs';
/**
* Module
*/
@NgModule({
imports: [
BrowserModule, UploaderModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule {
}import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';
enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);You can also explore Angular File Upload feature tour page for its groundbreaking features. You can also explore our Angular File Upload example to understand how to browse the files which you want to upload to the server.