# Data Binding in React Kanban Component
The Kanban uses `DataManager`, which supports both RESTful data service binding and JavaScript object array binding. The [dataSource](https://ej2.syncfusion.com/react/documentation/api/kanban/#datasource) property of Kanban can be assigned either with the instance of `DataManager` or JavaScript object array collection, as it supports the following two data binding methods:
* Local data
* Remote data
## Local data
To bind local JSON data to the Kanban, you can simply assign a JavaScript object array to the [dataSource](https://ej2.syncfusion.com/react/documentation/api/kanban/#datasource) property. The JSON object dataSource can also be provided as an instance of `DataManager` and assigned to the Kanban `dataSource` property.
`[Class-component]`
{% tabs %}
{% highlight js tabtitle="index.jsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { extend } from '@syncfusion/ej2-base';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
import { kanbanData } from './datasource';
class App extends React.Component {
constructor() {
super(...arguments);
this.data = extend([], kanbanData, null, true);
}
render() {
return ;
}
}
;
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight ts tabtitle="index.tsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { extend } from '@syncfusion/ej2-base';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
import { kanbanData } from './datasource';
class App extends React.Component<{}, {}>{
constructor() {
super(...arguments);
this.data = extend([], kanbanData, null, true);
}
render() {
return
}
};
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight html tabtitle="index.html" %}
Kanban Local Data
Loading....
{% endhighlight %}
{% endtabs %}
`[Functional-component]`
{% tabs %}
{% highlight js tabtitle="index.jsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { extend } from '@syncfusion/ej2-base';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
import { kanbanData } from './datasource';
function App() {
let data = extend([], kanbanData, null, true);
return ();
}
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight ts tabtitle="index.tsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { extend } from '@syncfusion/ej2-base';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
import { kanbanData } from './datasource';
function App(){
let data = extend([], kanbanData, null, true);
return(
);
}
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight html tabtitle="index.html" %}
Kanban Local Data
Loading....
{% endhighlight %}
{% endtabs %}
> By default, `DataManager` uses `JsonAdaptor` for binding local data.
## Remote data
To bind remote data to kanban component, assign service data as an instance of [DataManager](https://ej2.syncfusion.com/react/documentation/data/) to the [dataSource](https://ej2.syncfusion.com/react/documentation/api/kanban/#datasource) property. To interact with remote data source, provide the endpoint **url**.
`[Class-component]`
{% tabs %}
{% highlight js tabtitle="index.jsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataAdaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
class App extends React.Component {
data = new DataManager({
url: 'https://services.syncfusion.com/react/production/api/Kanban',
adaptor: new ODataAdaptor
});
DialogOpen(args) {
args.cancel = true;
}
render() {
return ;
}
}
;
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight ts tabtitle="index.tsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataAdaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective, DialogEventArgs } from "@syncfusion/ej2-react-kanban";
class App extends React.Component<{}, {}>{
public data = new DataManager({
url: 'https://services.syncfusion.com/react/production/api/Kanban',
adaptor: new ODataAdaptor
});
private DialogOpen(args: DialogEventArgs): void {
args.cancel = true;
}
render() {
return
}
};
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight html tabtitle="index.html" %}
Kanban Remote Data
Loading....
{% endhighlight %}
{% endtabs %}
`[Functional-component]`
{% tabs %}
{% highlight js tabtitle="index.jsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataAdaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
function App() {
let data = new DataManager({
url: 'https://services.syncfusion.com/react/production/api/Kanban',
adaptor: new ODataAdaptor
});
function DialogOpen(args) {
args.cancel = true;
}
return ();
}
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight ts tabtitle="index.tsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataAdaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective, DialogEventArgs } from "@syncfusion/ej2-react-kanban";
function App(){
let data = new DataManager({
url: 'https://services.syncfusion.com/react/production/api/Kanban',
adaptor: new ODataAdaptor
});
function DialogOpen(args: DialogEventArgs): void {
args.cancel = true;
}
return(
);
}
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight html tabtitle="index.html" %}
Kanban Remote Data
Loading....
{% endhighlight %}
{% endtabs %}
> By default, [DataManager](https://ej2.syncfusion.com/react/documentation/data/) uses **ODataAdaptor** for remote data-binding.
### OData services
[OData](http://www.odata.org/documentation/odata-version-3-0/) is a standardized protocol for creating and consuming data. You can retrieve data from OData service using the DataManager. Refer to the following code example for remote Data binding using OData service.
`[Class-component]`
{% tabs %}
{% highlight js tabtitle="index.jsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataAdaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
class App extends React.Component {
data = new DataManager({
url: 'https://services.syncfusion.com/react/production/api/Kanban',
adaptor: new ODataAdaptor,
crossDomain: true
});
DialogOpen(args) {
args.cancel = true;
}
render() {
return ;
}
}
;
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight ts tabtitle="index.tsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataAdaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective, DialogEventArgs } from "@syncfusion/ej2-react-kanban";
class App extends React.Component<{}, {}>{
public data = new DataManager({
url: 'https://services.syncfusion.com/react/production/api/Kanban',
adaptor: new ODataAdaptor,
crossDomain: true
});
private DialogOpen(args: DialogEventArgs): void {
args.cancel = true;
}
render() {
return
}
};
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight html tabtitle="index.html" %}
Kanban OData
Loading....
{% endhighlight %}
{% endtabs %}
`[Functional-component]`
{% tabs %}
{% highlight js tabtitle="index.jsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataAdaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
function App() {
let data = new DataManager({
url: 'https://services.syncfusion.com/react/production/api/Kanban',
adaptor: new ODataAdaptor,
crossDomain: true
});
function DialogOpen(args) {
args.cancel = true;
}
return ();
}
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight ts tabtitle="index.tsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataAdaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective, DialogEventArgs } from "@syncfusion/ej2-react-kanban";
function App(){
let data = new DataManager({
url: 'https://services.syncfusion.com/react/production/api/Kanban',
adaptor: new ODataAdaptor,
crossDomain: true
});
function DialogOpen(args: DialogEventArgs): void {
args.cancel = true;
}
return(
);
}
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight html tabtitle="index.html" %}
Kanban OData
Loading....
{% endhighlight %}
{% endtabs %}
### OData v4 services
The ODataV4 is an improved version of OData protocols, and the [DataManager](https://ej2.syncfusion.com/react/documentation/data/) can also retrieve and consume OData v4 services. For more details on OData v4 services, refer to the [odata documentation](http://docs.oasis-open.org/odata/odata/v4.0/errata03/os/complete/part1-protocol/odata-v4.0-errata03-os-part1-protocol-complete.html#_Toc453752197). To bind OData v4 service, use the **ODataV4Adaptor**.
`[Class-component]`
{% tabs %}
{% highlight js tabtitle="index.jsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataV4Adaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
class App extends React.Component {
data = new DataManager({
url: 'https://services.odata.org/v4/northwind/northwind.svc/Suppliers',
adaptor: new ODataV4Adaptor
});
DialogOpen(args) {
args.cancel = true;
}
render() {
return ;
}
}
;
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight ts tabtitle="index.tsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataV4Adaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective, DialogEventArgs } from "@syncfusion/ej2-react-kanban";
class App extends React.Component<{}, {}>{
public data = new DataManager({
url: 'https://services.odata.org/v4/northwind/northwind.svc/Suppliers',
adaptor: new ODataV4Adaptor
});
private DialogOpen(args: DialogEventArgs): void {
args.cancel = true;
}
render() {
return
}
};
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight html tabtitle="index.html" %}
Kanban ODataV4
Loading....
{% endhighlight %}
{% endtabs %}
`[Functional-component]`
{% tabs %}
{% highlight js tabtitle="index.jsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataV4Adaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
function App() {
let data = new DataManager({
url: 'https://services.odata.org/v4/northwind/northwind.svc/Suppliers',
adaptor: new ODataV4Adaptor
});
function DialogOpen(args) {
args.cancel = true;
}
return ();
}
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight ts tabtitle="index.tsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataV4Adaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective, DialogEventArgs } from "@syncfusion/ej2-react-kanban";
function App(){
let data = new DataManager({
url: 'https://services.odata.org/v4/northwind/northwind.svc/Suppliers',
adaptor: new ODataV4Adaptor
});
function DialogOpen(args: DialogEventArgs): void {
args.cancel = true;
}
return(
);
}
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight html tabtitle="index.html" %}
Kanban ODataV4
Loading....
{% endhighlight %}
{% endtabs %}
### Web API
You can use **WebApiAdaptor** to bind kanban with Web API created using OData endpoint.
`[Class-component]`
{% raw %}
```ts
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, WebApiAdaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective, DialogEventArgs } from "@syncfusion/ej2-react-kanban";
class App extends React.Component<{}, {}>{
public data = new DataManager({
url: '/api/Tasks',
adaptor: new WebApiAdaptor
});
private DialogOpen(args: DialogEventArgs): void {
args.cancel = true;
}
render() {
return
}
};
ReactDOM.render(, document.getElementById('kanban'));
```
{% endraw %}
`[Functional-component]`
{% raw %}
```ts
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, WebApiAdaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective, DialogEventArgs } from "@syncfusion/ej2-react-kanban";
function App(){
let data = new DataManager({
url: '/api/Tasks',
adaptor: new WebApiAdaptor
});
function DialogOpen(args: DialogEventArgs): void {
args.cancel = true;
}
return(
);
}
ReactDOM.render(, document.getElementById('kanban'));
```
{% endraw %}
Below is the server-side controller code to fetch Kanban data.
```ts
[HttpGet]
public object Get()
{
var data = OrdersDetails.GetAllRecords().ToList();
return data;
}
```
### URL adaptor
The CRUD (Create, Read, Update and Delete) actions can be performed easily on Kanban cards using the various adaptors available within the `DataManager`. Most preferably, we will be using `UrlAdaptor` for performing CRUD actions on Kanban.
The CRUD operation in Kanban can be mapped to server-side controller actions using the properties `insertUrl`, `removeUrl`, `updateUrl`, and `crudUrl`.
* `insertUrl` – You can perform a single insertion operation on the server-side.
* `updateUrl` – You can update single data on the server-side.
* `removeUrl` – You can remove single data on the server-side.
* `crudUrl` – You can perform bulk data operation on the server-side.
`[Class-component]`
{% raw %}
```ts
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, UrlAdaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
class App extends React.Component<{}, {}>{
public data = new DataManager({
url: 'Home/DataSource',
updateUrl: 'Home/Update',
insertUrl: 'Home/Insert',
removeUrl: 'Home/Delete',
adaptor: new UrlAdaptor(),
crossDomain: true
});
render() {
return
}
};
ReactDOM.render(, document.getElementById('kanban'));
```
{% endraw %}
`[Functional-component]`
{% raw %}
```ts
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, UrlAdaptor } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
function App(){
let data = new DataManager({
url: 'Home/DataSource',
updateUrl: 'Home/Update',
insertUrl: 'Home/Insert',
removeUrl: 'Home/Delete',
adaptor: new UrlAdaptor(),
crossDomain: true
});
return(
);
}
ReactDOM.render(, document.getElementById('kanban'));
```
{% endraw %}
The server-side controller code to handle CRUD operations is as follows.
```ts
private NORTHWNDEntities db = new NORTHWNDEntities();
public ActionResult DataSource() {
var DataSource = db.Tasks.ToList();
return Json(DataSource, JsonRequestBehavior.AllowGet);
}
public ActionResult Insert(Params value) {
//Insert card data into the database
return Json(value, JsonRequestBehavior.AllowGet);
}
public ActionResult Update(Params value) {
//Update card data into the database
return Json(value, JsonRequestBehavior.AllowGet);
}
public void Delete(Params value) {
//Delete card data from the database
}
public class Params {
public int Id { get; set; }
public string Status { get; set; }
public string Summary { get; set; }
public string Assignee { get; set; }
}
```
```ts
private NORTHWNDEntities db = new NORTHWNDEntities();
public ActionResult DataSource() {
var DataSource = db.Tasks.ToList();
return Json(DataSource, JsonRequestBehavior.AllowGet);
}
public ActionResult Insert(Params value) {
//Insert card data into the database
return Json(value, JsonRequestBehavior.AllowGet);
}
public ActionResult Update(Params value) {
//Update card data into the database
return Json(value, JsonRequestBehavior.AllowGet);
}
public void Delete(Params value) {
//Delete card data from the database
}
public class Params {
public int Id { get; set; }
public string Status { get; set; }
public string Summary { get; set; }
public string Assignee { get; set; }
}
```
> The `crudUrl` is used to update the bulk data sent to the server-side. Multiple selections and `sortBy` as `Index` properties are used for `crudUrl` properties to update the modified bulk data to the server-side.
### Custom adaptor
It is possible to create your own custom adaptor by extending the built-in available adaptors. The following example demonstrates the custom adaptor usage and how to add a custom field `TaskId` for the cards by overriding the built-in response processing using the `processResponse` method of the `ODataAdaptor`.
`[Class-component]`
{% tabs %}
{% highlight js tabtitle="taskidadaptor.jsx" %}
import { setValue } from '@syncfusion/ej2-base';
import { ODataAdaptor } from '@syncfusion/ej2-data';
export class TaskIdAdaptor extends ODataAdaptor {
processResponse() {
let i = 0;
/* calling base class processResponse function */
const original = super.processResponse.apply(this, arguments);
/* adding Task Id */
original.forEach((item) => setValue('Id', 'Task - ' + ++i, item));
return original;
}
}
{% endhighlight %}
{% highlight ts tabtitle="taskidadaptor.tsx" %}
import { setValue } from '@syncfusion/ej2-base';
import { ODataAdaptor } from '@syncfusion/ej2-data';
export class TaskIdAdaptor extends ODataAdaptor {
public processResponse() {
let i = 0;
/* calling base class processResponse function */
const original = super.processResponse.apply(this, arguments);
/* adding Task Id */
original.forEach((item: any) => setValue('Id', 'Task - ' + ++i, item));
return original;
}
}
{% endhighlight %}
{% endtabs %}
`[Functional-component]`
{% tabs %}
{% highlight js tabtitle="taskidadaptor.jsx" %}
import { setValue } from '@syncfusion/ej2-base';
import { ODataAdaptor } from '@syncfusion/ej2-data';
export class TaskIdAdaptor extends ODataAdaptor {
processResponse() {
let i = 0;
/* calling base class processResponse function */
const original = super.processResponse.apply(this, arguments);
/* adding Task Id */
original.forEach((item) => setValue('Id', 'Task - ' + ++i, item));
return original;
}
}
{% endhighlight %}
{% highlight ts tabtitle="taskidadaptor.tsx" %}
import { setValue } from '@syncfusion/ej2-base';
import { ODataAdaptor } from '@syncfusion/ej2-data';
export class TaskIdAdaptor extends ODataAdaptor {
public processResponse() {
let i = 0;
/* calling base class processResponse function */
const original = super.processResponse.apply(this, arguments);
/* adding Task Id */
original.forEach((item: any) => setValue('Id', 'Task - ' + ++i, item));
return original;
}
}
{% endhighlight %}
{% endtabs %}
### Sending additional parameters to the server
To add a custom parameter to the data request, use the **addParams** method of **Query** class. Assign the **Query** object with additional parameters to the kanban [query](https://ej2.syncfusion.com/react/documentation/api/kanban/#query) property.
`[Class-component]`
{% tabs %}
{% highlight js tabtitle="index.jsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataAdaptor, Query } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
class App extends React.Component {
data = new DataManager({
url: 'https://services.syncfusion.com/react/production/api/Kanban',
adaptor: new ODataAdaptor
});
DialogOpen(args) {
args.cancel = true;
}
query = new Query().addParams('ej2kanban', 'true');
render() {
return ;
}
}
;
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight ts tabtitle="index.tsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataAdaptor, Query } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective, DialogEventArgs } from "@syncfusion/ej2-react-kanban";
class App extends React.Component<{}, {}>{
public data = new DataManager({
url: 'https://services.syncfusion.com/react/production/api/Kanban',
adaptor: new ODataAdaptor
});
private DialogOpen(args: DialogEventArgs): void {
args.cancel = true;
}
private query: Query = new Query().addParams('ej2kanban', 'true');
render() {
return
}
};
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight html tabtitle="index.html" %}
Kanban Additional Parameter
Loading....
{% endhighlight %}
{% endtabs %}
`[Functional-component]`
{% tabs %}
{% highlight js tabtitle="index.jsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataAdaptor, Query } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
function App() {
let data = new DataManager({
url: 'https://services.syncfusion.com/react/production/api/Kanban',
adaptor: new ODataAdaptor
});
function DialogOpen(args) {
args.cancel = true;
}
let query = new Query().addParams('ej2kanban', 'true');
return ();
}
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight ts tabtitle="index.tsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager, ODataAdaptor, Query } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective, DialogEventArgs } from "@syncfusion/ej2-react-kanban";
function App(){
let data = new DataManager({
url: 'https://services.syncfusion.com/react/production/api/Kanban',
adaptor: new ODataAdaptor
});
function DialogOpen(args: DialogEventArgs): void {
args.cancel = true;
}
let query: Query = new Query().addParams('ej2kanban', 'true');
return(
);
}
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight html tabtitle="index.html" %}
Kanban Additional Parameter
Loading....
{% endhighlight %}
{% endtabs %}
> The parameters added using the [query](https://ej2.syncfusion.com/react/documentation/api/kanban/#query) property will be sent along with the data request for every kanban action.
### Handling HTTP error
During server interaction from the kanban, some server-side exceptions may occur, and you can acquire those error messages or exception details
in client-side using the [actionFailure](https://ej2.syncfusion.com/react/documentation/api/kanban/#actionfailure) event.
The argument passed to the [actionFailure](https://ej2.syncfusion.com/react/documentation/api/kanban/#actionfailure) event contains the error details returned from the server.
`[Class-component]`
{% tabs %}
{% highlight js tabtitle="index.jsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
class App extends React.Component {
kanban;
data = new DataManager({
url: 'http://some.com/invalidUrl'
});
render() {
this.onActionFailure = this.onActionFailure.bind(this);
return this.kanban = kanban} id="kanban" keyField="Status" dataSource={this.data} cardSettings={{ contentField: "Summary", headerField: "Id" }} actionFailure={this.onActionFailure}>
;
}
onActionFailure = (e) => {
const span = document.createElement('span');
if (this.kanban) {
this.kanban.element.parentNode.insertBefore(span, this.kanban.element);
span.style.color = "#FF0000";
span.innerHTML = "Server exception: 404 Not found";
}
};
}
;
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight ts tabtitle="index.tsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective, DialogEventArgs, ActionEventArgs } from "@syncfusion/ej2-react-kanban";
class App extends React.Component<{}, {}>{
private kanban: KanbanComponent;
public data = new DataManager({
url: 'http://some.com/invalidUrl'
});
render() {
this.onActionFailure = this.onActionFailure.bind(this);
return this.kanban = kanban} id="kanban" keyField="Status" dataSource={this.data} cardSettings={{ contentField: "Summary", headerField: "Id" }} actionFailure={this.onActionFailure}>
}
public onActionFailure = (e: ActionEventArgs) => {
const span: HTMLElement = document.createElement('span');
if (this.kanban) {
(this.kanban.element.parentNode as HTMLElement).insertBefore(span, this.kanban.element);
span.style.color = "#FF0000";
span.innerHTML = "Server exception: 404 Not found";
}
}
};
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight html tabtitle="index.html" %}
Kanban Action Failure
Loading....
{% endhighlight %}
{% endtabs %}
`[Functional-component]`
{% tabs %}
{% highlight js tabtitle="index.jsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
function App() {
const kanbanRef = React.useRef(null);
let data = new DataManager({
url: 'http://some.com/invalidUrl'
});
function onActionFailure(e) {
const span = document.createElement('span');
const kanban = kanbanRef.current;
if (kanban) {
kanban.element.parentNode.insertBefore(span, kanban.element);
span.style.color = "#FF0000";
span.innerHTML = "Server exception: 404 Not found";
}
}
return ();
}
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight ts tabtitle="index.tsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { DataManager } from '@syncfusion/ej2-data';
import { KanbanComponent, ColumnsDirective, ColumnDirective, DialogEventArgs, ActionEventArgs } from "@syncfusion/ej2-react-kanban";
function App() {
let data = new DataManager({
url: 'http://some.com/invalidUrl'
});
const kanbanRef = React.useRef(null);
function onActionFailure(e: ActionEventArgs) {
const span: HTMLElement = document.createElement('span');
const kanban = kanbanRef.current;
if (kanban) {
(kanban.element.parentNode as HTMLElement).insertBefore(span, kanban.element);
span.style.color = "#FF0000";
span.innerHTML = "Server exception: 404 Not found";
}
}
return (
);
}
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight html tabtitle="index.html" %}
Kanban Action Failure
Loading....
{% endhighlight %}
{% endtabs %}
> The [actionFailure](https://ej2.syncfusion.com/react/documentation/api/kanban/#actionfailure) event will be triggered not only for the server errors, but also when there is an exception while processing the kanban actions.
## Loading data via ajax
You can use Kanban [dataSource](https://ej2.syncfusion.com/react/documentation/api/kanban/#datasource) property to bind the datasource to Kanban from external ajax request. In the following code, we have fetched the datasource from the server using ajax request and provided that to the [`dataSource`](https://ej2.syncfusion.com/react/documentation/api/kanban/#datasource) property by using the **onSuccess** event of ajax.
`[Class-component]`
{% tabs %}
{% highlight js tabtitle="index.jsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { Ajax } from '@syncfusion/ej2-base';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
class App extends React.Component {
kanban;
componentDidMount() {
const ajax = new Ajax("https://services.syncfusion.com/react/production/api/Orders", "GET");
ajax.send();
ajax.onSuccess = (data) => {
if (this.kanban) {
this.kanban.dataSource = JSON.parse(data);
}
};
}
render() {
return this.kanban = kanban} id="kanban" keyField="ShipCountry" dataSource={this.data} cardSettings={{ contentField: "ShippedDate", headerField: "OrderID" }}>
;
}
}
;
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight ts tabtitle="index.tsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { Ajax } from '@syncfusion/ej2-base';
import { KanbanComponent, ColumnsDirective, ColumnDirective, Kanban } from "@syncfusion/ej2-react-kanban";
class App extends React.Component<{}, {}>{
public kanban: Kanban | null;
public componentDidMount(){
const ajax = new Ajax("https://services.syncfusion.com/react/production/api/Orders", "GET");
ajax.send();
ajax.onSuccess = (data: any) => {
if (this.kanban) {
this.kanban.dataSource = JSON.parse(data);
}
}
}
render() {
return this.kanban = kanban} id="kanban" keyField="ShipCountry" dataSource={this.data} cardSettings={{ contentField: "ShippedDate", headerField: "OrderID" }}>
}
};
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight html tabtitle="index.html" %}
Kanban AJAX Binding
Loading....
{% endhighlight %}
{% endtabs %}
`[Functional-component]`
{% tabs %}
{% highlight js tabtitle="index.jsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { Ajax } from '@syncfusion/ej2-base';
import { KanbanComponent, ColumnsDirective, ColumnDirective } from "@syncfusion/ej2-react-kanban";
function App() {
const kanbanRef = React.useRef(null);
React.useEffect(() => {
const ajax = new Ajax("https://services.syncfusion.com/react/production/api/Orders", "GET");
ajax.send();
ajax.onSuccess = (data) => {
const kanban = kanbanRef.current;
if (kanban) {
kanban.dataSource = JSON.parse(data);
}
};
}, []);
return ();
}
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight ts tabtitle="index.tsx" %}
import * as React from 'react';
import * as ReactDOM from 'react-dom';
import { Ajax } from '@syncfusion/ej2-base';
import { useEffect } from "react";
import { KanbanComponent, ColumnsDirective, ColumnDirective, Kanban } from "@syncfusion/ej2-react-kanban";
function App(){
let kanbanObj: KanbanComponent|null;
React.useEffect(() => {
const ajax = new Ajax("https://services.syncfusion.com/react/production/api/Orders", "GET");
ajax.send();
ajax.onSuccess = (data: any) => {
if (kanbanObj) {
kanbanObj.dataSource = JSON.parse(data);
}
}
});
return(
{ kanbanObj = kanban }} id="kanban" keyField="ShipCountry" cardSettings={{ contentField: "ShippedDate", headerField: "OrderID" }}>
);
}
ReactDOM.render(, document.getElementById('kanban'));
{% endhighlight %}
{% highlight html tabtitle="index.html" %}
Kanban AJAX Binding
Loading....
{% endhighlight %}
{% endtabs %}
> * If you bind the dataSource from this way, then it acts like a local dataSource. So you cannot perform any server-side crud actions.