Getting Started
23 Jun 201713 minutes to read
This section explains briefly about how to create an Uploadbox in your application with Aurelia. Essential JavaScript Uploadbox widget provides support to upload files or photos within your web page. From the following guidelines, you can learn how to upload the files that are used in a Resume Upload scenario. This helps you to restrict some file extensions when you upload the resume in server by using Uploadbox control.
The following screenshot demonstrates the functionality of Uploadbox with the file extension.
In the above screenshot, you can upload a resume that allows .txt files. This helps you to avoid unsupported resume formats getting uploaded in a server.
NOTE
To get upload the file, you should either run this sample in Visual Studio IDE or host in local IIS.
Create Uploadbox in Aurelia
Before we start with Uploadbox, please refer this page page for general information regarding integrating Syncfusion widget’s.
For quick start, we already configured a template project in GitHub repository syncfusion-template-repository. Run the below set of commands to clone the repository and install the required packages for Syncfusion Aurelia application.
> git clone "https://github.com/aurelia-ui-toolkits/syncfusion-template-repository"
> cd syncfusion-template-repository
> npm install
> jspm installThe below steps describes to create Syncfusion Aurelia Uploadbox component.
Create Uploadbox folder inside src/samples/ location.
Create Uploadbox.html file inside src/samples/Uploadbox folder and use the below code example to render the Uploadbox component. Add an element to render a **Uploadbox.**
<template>
<div>
<div id="targetElement">Select a file to upload </div>
<div class="uploadbox-default-control">
<ej-uploadbox id="UploadDefault" e-save-url.bind="save" e-remove-url.bind="remove">
</ej-uploadbox>
</div>
</div>
</template>Add the given styles to display the Uploadbox with margin alignments.
<style>
.uploadbox-default-control {
margin: 0 auto;
width:100px;
height:35px;
}
.posupload {
text-align:center;
}
</style>Create a new handler file (.ashx) and save it as saveFiles.ashx and then copy the following code into it.
SaveFiles.ashx
public void ProcessRequest(HttpContext context)
{
string targetFolder = HttpContext.Current.Server.MapPath("uploadfiles");
if (!Directory.Exists(targetFolder))
{
Directory.CreateDirectory(targetFolder);
}
HttpRequest request = context.Request;
HttpFileCollection uploadedFiles = context.Request.Files;
if (uploadedFiles != null && uploadedFiles.Count > 0)
{
for (int i = 0; i < uploadedFiles.Count; i++)
{
if (uploadedFiles[i].FileName != null && uploadedFiles[i].FileName != "")
{
string fileName = uploadedFiles[i].FileName;
int indx = fileName.LastIndexOf("\\");
if (indx > -1)
{
fileName = fileName.Substring(indx + 1);
}
uploadedFiles[i].SaveAs(targetFolder + "\\" + fileName);
}
}
}
}Create a new handler file (.ashx) and save it as removeFiles.ashx and then copy the following code into it.
removeFiles.ashx
public void ProcessRequest(HttpContext context)
{
System.Collections.Specialized.NameValueCollection s = context.Request.Params;
string fileName = s["fileNames"];
string targetFolder = HttpContext.Current.Server.MapPath("uploadfiles");
if (Directory.Exists(targetFolder))
{
string physicalPath = targetFolder + "\\" + fileName;
if (System.IO.File.Exists(physicalPath))
{
System.IO.File.Delete(physicalPath);
}
}
}Add the following code example to assign saveUrl and removeUrl for Uploadbox
export class DefaultFunctionalities {
constructor() {
this.save = '../saveFiles.ashx';
this.remove = '../removeFiles.ashx';
}
}The following screenshot displays an Uploadbox control.
After you upload the files, the following screen shot is displayed.
NOTE
The above screenshot displays the Uploadbox control that shows the files are uploaded successfully.
Set Restriction for File Extension
In a real-time scenario, some file extensions are restricted. You can allow files and restrict files by using the following two properties extensionsAllow and extensionsDeny enabled in Uploadbox.
NOTE
The SaveUrl and RemoveUrl are the same as above (see step 4)
Add input elements to create elements for file extension.
NOTE
Add the following input elements and two button elements to give file extensions that should support uploading.
<template>
<div id="targetElement">
<table id="uploadTable">
<tr>
<td>
Extensions:
</td>
<td></td>
</tr>
<tr>
<td>
<input type="text" id="fileallow" class="tb6 ejinputtext" placeholder="Format" />
<input type="button" class="e-btn" id="upbutton1" value="Allow" ej-button="" e-on-click.trigger="allowFileType($event)" />
</td>
<td></td>
</tr>
<tr>
<td>
<input type="text" id="filedeny" class="tb6 ejinputtext" placeholder="Format" />
<input type="button" class="e-btn" id="upbutton2" value="Deny" ej-button="" e-on-click.trigger="denyFileType($event)" />
</td>
<td>
<ej-uploadbox id="UploadInput" e-save-url.bind="save" e-remove-url.bind="remove" e-multiple-files-selection.bind="multipleFiles"
e-on-create.trigger="create()">
</ej-uploadbox>
</td>
</tr>
</table>
</div>
</template>Add the following code example for click event
export class DefaultFunctionalities {
constructor() {
this.save = '../saveFiles.ashx';
this.remove = '../removeFiles.ashx';
}
create() {
this.uploadobject = $('#UploadInput').data('ejUploadbox');
}
allowFileType(event) {
this.uploadobject.option('extensionsAllow', $('#fileallow').val());
this.uploadobject.option('extensionsDeny', '');
$('#filedeny').val('');
}
denyFileType(event) {
this.uploadobject.option('extensionsAllow', '');
this.uploadobject.option('extensionsDeny', $('#filedeny').val());
$('#fileallow').val('');
}
}Add the given styles to display the Uploadbox with margin alignments.
<style>
#targetElement {
width: 520px;
height: 500px;
margin: 0 auto;
}
#UploadDefault {
float: right;
}
#uploadTable {
width: 100%;
}
#fileallow, #filedeny {
width: 150px;
height: 20px;
padding: 5px;
}
</style>NOTE
You can restrict one or more files at a time by giving it as .html,.txt
The following screenshot displays an Uploadbox control with the file extension.
The above screenshot shows the Uploadbox that allows “.txt” file formats. You can give number of file formats in both allow and deny textbox elements.
Upload Multiple Files
You can click the Browse button and select files to upload multiple files in Uploadbox control. You can see the selected files in Uploadbox control and you can upload all the files.
The following screenshot displays an Uploadbox control with multiple files.
