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Ext JS for .NET using Ext.NET

May 4, 2016 107 Views

Guest Blog Post

Ext.NET is an ASP.NET MVC and Web Forms framework incorporating Sencha Ext JS JavaScript framework. Ext.NET 4.0 release includes many new features and improvements and of course one of the biggest enhancements includes the upgrade to Sencha Ext JS 6.

Our partnership with Sencha began more than eight years ago, and Ext.NET has always been the easiest way to build rich Ext JS based JavaScript applications for ASP.NET developers.

Bundled within Ext.NET 4, Sencha Ext JS 6 includes a toolkit of 100+ user interface components including Data Grids, Menus, Trees, Form Elements, Buttons, Panels, Windows and dozens of powerful extensions, all integrated and professionally supported by the Ext.NET team. It is by far the most extensive toolkit of enterprise-quality controls for ASP.NET in the industry.

Both ASP.NET MVC and Web Forms are fully supported with Ext.NET, including the ASP.NET MVC Razor View Engine. The Examples Explorers are a great place to explore what’s possible for both ASP.NET Web Forms and MVC development, now with a combined total of 750+ working samples.

At Ext.NET, our philosophy from day one has been to ensure it just works. Out of the box, developers should be able to jump right in to building an Ext.NET based application using the .NET skills and development tools they’ve already invested in.

The Ext.NET support team is always available to help answer questions, and we pride ourselves on the enterprise quality of our support. This is the most mentioned advantage of Ext.NET from our community.

Server Side Flexibility

The advantages of ASP.NET have always been on the server-side, especially when connecting varied data sources and back-end processes. As a web application developer, the challenge is how to unleash this power into an easy-to-use client application that your users will rave about.

Built-in asynchronous AJAX-based communication options using Direct Events and Direct Methods simplify the process of getting information to your users and sent back to the server.

The following code sample demonstrates how to configure a simple Button, and tie clicking of the Button to a server-side ASP.NET MVC Controller action.

// ASP.NET MVC Controller
public ActionResult GetTime()
    X.Msg.Notify("Server Time: ", DateTime.Now).Show();

    return this.Direct();

	.Text("Click Me")

With Ext.NET, you have access to an extensive and cohesive set of tools for building modern web-based software applications, so you can be highly focused on implementing your project requirements.

Strong Typing and IntelliSense

Time is a precious resource, so focus your efforts where they matter most. Using Ext.NET and compile-time checking helps catch errors early, while the problem is easy to isolate and fix immediately. The bigger the application, the more benefit your development team will receive from strong typing, compile-time checking, statement completion, and inline documentation.

ASP.NET MVC Razor View

ASP.NET MVC Razor View

ASP.NET MVC Web Forms Page

ASP.NET MVC Web Forms Page

By using powerful developer tools you already know and love, such as Visual Studio and ReSharper, you’ll speed up application development while leveraging the quality and flexibility of Ext.NET.

Example Explorers

The Ext.NET Examples Explorers are a huge repository of 750+ samples demonstrating all aspects of the framework and bundled Ext JS functionality.

The ASP.NET MVC and Web Forms Examples Explorers have been upgraded to Ext.NET 4 with a fresh new look provided by the Triton theme and FontAwesome fonts.

ASP.NET MVC and Web Forms Examples Explorers

New Spreadsheet Functionality

The powerful new Spreadsheet Selection Model has been incorporated into Ext.NET 4 and enables you to select GridPanel data in a spreadsheet-like manner. Converting a GridPanel into a Spreadsheet is as easy as adding SpreadsheetSelectionModel to your GridPanels «SelectionModel».

The following snippet demonstrates how to configure the SpreadsheetSelectionModel using Ext.NET markup syntax.


The best way to explore the new SpreadsheetSelectionModel functionality is to review the six new samples added to the Examples Explorer. We intentionally built the samples to be clean and simple with each focused on a limited set of features.

The Spreadsheet Selection Model is also a great example of what Ext.NET does best. By extending the underlying client-side Ext JS components with productive server-side functionality, Ext.NET bridges the gap between the two layers.

New Triton Theme

New Triton Theme

Ext.NET 4 ships bundled with the new Triton Theme. Triton brings a contemporary user interface design to both desktop and tablet based Ext.NET applications.

The speed and power of Ext.NET are well demonstrated by how easily you can update the look of your application. Simply set Theme="Triton" within your ResourceManager or as a global setting within your projects Global.asax.cs file.


We hope this quick introduction to Ext.NET has been interesting and helpful. Get more details about installation, upgrading, and what’s included in this release. Please note that while Ext JS 6 unified the Ext JS and Sencha Touch frameworks, currently Ext.NET 4 does not support the mobile API. The two frameworks (desktop and mobile) are still unique and will require a separate release of Ext.NET in the future.

We always appreciate your feedback. Please feel free to add a comment below.

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