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Mehul Harry is the DevExpress Web Program Manager. Follow him on twitter: @Mehulharry

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October 2017 - Posts

  • HTML5 JavaScript DataGrid and PivotGrid Enhancements (v17.2)

    The DevExtreme DataGrid and PivotGrid widgets are getting enhancements for you and your end-users. In the v17.2 release we're adding UI features that help you when working with data in our grids:

    Built-in Search in Header Filter

    The Header Filter is a great way to filter the data in the grid because it gives you all the unique values of the column. However, if there are many distinct values, it can be annoying to scroll through the list trying to find a particular value.

    In the next 17.2 release, we've added a search text box that allows to filter data inside the dxDataGrid and dxPivotGrid's header filters. This gif shows the new feature in action:

    DevExtreme Grid Header Filter

    You can still control whether searching is enabled in the header filter using the dxDataGrid.headerFilter.allowSearch and dxPivotGrid.headerFilter.allowSearch options.

    Built-in Search in Column/Field Chooser

    We've also added the search functionality to the dxDataGrid's column and dxPivotGrid's field chooser:

    DevExtreme Grid Field Chooser

    Customize these features through the dxDataGrid.columnChooser.allowSearch and dxPivotGrid.fieldChooser.allowSearch options.

    Built-in Date-Time Filter for dxDataGrid

    The dxDataGrid’s DateTime columns can be now filtered using the date and time:

    DevExtreme Grid Date-Time Filter

    Additional minor improvements

    • The validationCallback function now provides access to the current dxDataGrid row data via the data parameter when a Custom validation rule is used  
    • The dxPivotGrid field’s sortBy option can now accept the none value to disable local sorting

    Angular, ASP.NET MVC/Core, & More!

    Note that all these new features are available in the DataGrid and PivotGrid Angular components, ASP.NET MVC and .NET Core controls, and jQuery widgets too.

    Try it now

    The new features of our dxDataGrid and dxPivotGrid widgets are included in the v17.2 pre-release that is available via npm right now. Please note that this pre-release may contain some bugs and is not intended to be used in production:

    npm install devextreme@17.2.1-pre-17273

    Learn more about DevExtreme's pre-releases in this blog post.

    What do you think about the grid improvements in the next release? Drop me a line below.


    Twitter: @mehulharry

  • DevExtreme ASP.NET MVC Controls – Improvements & New Features in Data Sources (coming soon in v17.2)

    The DevExtreme ASP.NET MVC Controls provide a powerful data layer to help you read and write data with our controls. The data layer is invisible but serves an important role for your apps. In fact, we've got a great documentation data layer topic that I recommend reading:

    In this blog post, I'll highlight the changes coming to the DevExtreme data layer in the upcoming v17.2 release. We're introducing a set of changes and improvements that are primarily driven by customer feedback.

    New behavior of Url generation of .Mvc() and .WebApi() data sources

    In the v17.1.5 release, I talked in detail about the change to our DataSource URL generation. Please take a look at this blog post that describes our motivation and the changes: DevExtreme ASP.NET MVC Controls: DataSource URL Improvements (17.1.5).

    Since August 2017, many customers have shared projects and code with our support team and it's good to see that many have enabled the new mode and are happy with it.

    Warning: In the v17.2 release, we're changing the default value of the flag controlling that behavior (UseLegacyRouting) to false. Meaning, we don't want to use legacy routing but the new and improved approach. However...

    This could BREAK your existing projects. This potential breaking change can be avoided. However, I recommend that you test your existing projects as we've seen good feedback from many customers. You can test this change using the new flag now by downloading v17.1.5+ release, which is available now.

    If you're not ready for the change when v17.2 is released then simply set the UseLegacyRouting to true:

    For ASP.NET MVC 5 applications, in Global.asax.cs:

    protected void Application_Start()
      DevExtreme.AspNet.Mvc.Compatibility.DataSource.UseLegacyRouting = true;
      // ... the rest of your code ...

    For .NET Core apps, in Startup.cs:

    public void Configure(IApplicationBuilder app, 
                          IHostingEnvironment env, 
                          ILoggerFactory loggerFactory) 
      DevExtreme.AspNet.Mvc.Compatibility.DataSource.UseLegacyRouting = true;
      // ... the rest of your code ...

    In v17.2, all DevExtreme demos and project templates have been updated to use the new routing mode. This, you'll find, works more predictably and in accordance with the standard MVC @Url.Action and @Url.RouteUrl constructs.

    Support for Areas

    Areas are an ASP.NET MVC feature used to organize related functionality into a group as a separate namespace (for routing) and folder structure (for views). Using areas creates a hierarchy for the purpose of routing by ... Areas provide a way to partition a large ASP.NET Core MVC Web app into smaller functional groupings. - Microsoft Documentation

    Also in v17.2, we've added support for 'areas'. So both the .Mvc() and .WebApi() data sources now provide the .Area() configuration option in addition to .Controller() and .Action(). This means that you can now reference API controllers in different areas.

    RemoteController: consume API controllers from a different domain/host

    If API controllers were located on another domain, it was problematic to use them. Customers had to use JavaScript instead of strongly-typed Razor syntax.

    In 17.2 we improve this by introducing a new kind of data source: RemoteController. Basically it is the same as .Mvc() or .WebApi() but instead of specifying routing options (controller, action, etc), you specify direct Urls pointing to anywhere on the web.

    Here's an example:

        .DataSource(ds => ds.RemoteController()

    Updated DevExtreme.AspNet.Data library with new features

    DevExtreme.AspNet.Data, the open-source library used by DevExtreme ASP.NET MVC Controls for data access has been updated to version 1.3 with a number of enhancements:

    • Support for server-side "select" operation (PR #125)
    • Published LoadResult and Group classes (PR #130)

    What do you think about the DevExtreme ASP.NET MVC Controls? Drop me a line below.


    Twitter: @mehulharry

    Create highly responsive web apps for touch-enabled devices and traditional desktops.

    From desktops to mobile devices, DevExtreme HTML5 Data Grid delivers the flexibility you’ll need to build apps that reach the widest audience and deliver touch-first user experiences to power your next great interactive website.

    Download a free and fully-functional version of DevExtreme now: Download DevExtreme

  • New Bootstrap Controls for ASP.NET Core 2.0 (CTP release)! - Join the pre-release party

    Earlier this year, we released the DevExpress ASP.NET Bootstrap controls for the ASP.NET WebForms framework. We developed these new set of innovative controls to provide a great experience when used within the Bootstrap framework. If you're not familiar with our Bootstrap controls, please take a look at these past blog posts.

    After releasing these new controls for WebForms, one of the biggest questions we got was, "What about ASP.NET Core and MVC?"

    Well, I'm here to announce another great innovative web offering from DevExpress ...

    ASP.NET Core...Cross platform

    Version 2.0 of the new ASP.NET Core framework was recently released and I'm happy to announce our new set of controls specifically for this new framework: 'the DevExpress ASP.NET Bootstrap controls for ASP.NET Core 2.0'. That's the unofficial name for now.

    These new controls have a new API and architecture that takes advantage of the ASP.NET Core framework. However, they do keep a similar set of features as the existing ASP.NET Bootstrap controls for WebForms.

    The combination of ASP.NET Core framework and DevExpress Bootstrap controls means:

    1. Write modern web application using C# (or your favorite supported .NET language)
    2. Cross-platform support: Linux, MacOS, and Windows
    3. Use a wide set of Bootstrap themes (
    4. Full support for MVC features: Data Annotation attributes, model binding, unobtrusive validation, and more.
    5. DevExpress elegance, power, ease, and features!

    Help Test CTP Release

    The first release of these controls is a CTP (community technology preview). It's available today and we'd love for you to test them in your ASP.NET Core 2.0 projects.

    By testing the new controls and providing us feedback, you'll help us improve them before the final release.

    Getting started

    We've made the getting started experience easy using our NuGet server. Take a look at this step-by-step guide:

    Then play around with the online demos:

    Provide feedback

    Once you've integrated them into your project, please provide us feedback via the excellent DevExpress Support Center.

    What's included?

    Nearly all 20+ of the existing DevExpress ASP.NET Bootstrap controls are available in this CTP release. This includes controls like the GridView, Navigation controls, Editors, and more. However, the FormLayout, UploadControl, and the Charts are not available yet.

    Also check out these projects that help you to get started:

    A GitHub starter project with necessary packages and references

    A Docker image that contains the GitHub starter project running on Ubuntu!

    The web is about choices...

    Currently, we also offer another set of controls for the ASP.NET Core framework, the DevExtreme ASP.NET MVC Controls.

    The main goal of the DevExpress ASP.NET Bootstrap Controls for ASP.NET Core is full compatibility with Bootstrap themes. If you plan to create a Bootstrap application then use the Bootstrap Controls whether for ASP.NET WebForms or ASP.NET Core.

    The DevExtreme ASP.NET MVC Controls support ASP.NET MVC (3+) and ASP.NET Core (1.x and 2.0). Keep in mind that they're based on client-side JavaScript controls. If you are a JavaScript dev then you may prefer the 'DevExtreme ASP.NET MVC Controls'. If you are a .NET dev then you may prefer 'the DevExpress ASP.NET Bootstrap Controls for ASP.NET Core'.

    What about ASP.NET MVC?

    At this time, our new Bootstrap controls for ASP.NET Core 2.0 will not support previous versions of the ASP.NET MVC framework. That is not to say that they will never support those frameworks. We will keep an eye on your feedback and decide in the future.

    Bootstrap 4 Beta

    The Bootstrap team just announced the 'Bootstrap 4 beta' release.

    Good news, we are supporting Bootstrap 4 for our new Bootstrap controls for ASP.NET Core 2.0 out of the box.

    Join the webinar

    On Tuesday, October 24th, 2017 at 10am, I'll show you how to get started with the new DevExpress ASP.NET Bootstrap Controls for ASP.NET Core 2.0. You'll learn about the NuGet package(s), boilerplate project, changing Bootstrap themes, and features of the controls. We'll also cover ASP.NET Core features such as Model Binding, Data Annotations, and Unobtrusive Validation.

    Sign up for the live webinar here: New Bootstrap Controls for ASP.NET Core 2.0

    What do you think of the CTP release of the DevExpress Bootstrap Controls for ASP.NET Core 2.0? Drop me a line below.


    Your Next Great .NET App Starts Here

    Year after year, .NET developers such as yourself consistently vote DevExpress products #1.

    Experience the DevExpress difference for yourself and download a free 30-day trial of all our products today: (free support is included during your evaluation).

  • Use DevExtreme ASP.NET MVC Controls easily in ASP.NET Core 2.0

    In August 2017 Microsoft released the ASP.NET Core 2.0 framework. This major update packs a lot of new features as their announcement blog post makes clear:

    This release features compatibility with .NET Core 2.0, tooling support in Visual Studio 2017 version 15.3, and the new Razor Pages user-interface design paradigm. For a full list of updates... -Microsoft Announcement blog post

    We've been working hard to provide compatibility with this new release and I'm happy to announce that our DevExtreme ASP.NET MVC controls now support ASP.NET Core 2.0.

    To get ASP.NET Core 2.0 in Visual Studio 2017 15.3.x, please check this link:

    To learn more details about ASP.NET Core 2.0, please see this detailed blog post:

    Get started

    To get started with ASP.NET Core 2.0 and DevExtreme MVC Controls in just a few minutes, create an ASP.NET Core 2.0 project using VS2017 and then add DevExtreme MVC Controls resources to it using this guide (see "ASP.NET Core MVC" section):

    DevExtreme ASP.NET MVC Controls: Download and Installation

    In this screenshot of the Solution Explorer, you see the necessary DevExtreme packages and files that you'll need for ASP.NET Core 2.0:

    Upgrade Existing Projects

    To upgrade your existing ASP.NET Core 1.x application that is based on *.csproj and includes DevExtreme MVC Controls, you'll need to make the following changes:

    1. Change the "TargetFramework" in your *.csproj file:
    1. Replace "Microsoft.AspNetCore.*" packages with the new "Microsoft.AspNetCore.All" meta package:
    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.0" />

    Your csproj file should look something like this:

    Then run your upgraded project and the DevExtreme ASP.NET MVC Controls will work in ASP.NET Core 2.0:

    Razor Pages

    As part of ASP.NET Core 2.0, Microsoft also introduced 'Razor Pages', which makes page-focused scenarios easier and more productive:

    Razor Pages allow you to code without the need for a controller, for example:

    We tested the DevExtreme ASP.NET MVC Controls with the new Razor Pages feature and it works brilliantly. Here's the DevExtreme ASP.NET MVC DataGrid that's bound to a WebAPI web service in a Razor Page:

    Are you using DevExtreme MVC Controls with ASP.NET Core 2.0? I'd love to hear about it, drop me a line below. Thanks!

    Twitter: @mehulharry

    Create highly responsive web apps for touch-enabled devices and traditional desktops.

    From desktops to mobile devices, DevExtreme HTML5 Data Grid delivers the flexibility you’ll need to build apps that reach the widest audience and deliver touch-first user experiences to power your next great interactive website.

    Download a free and fully-functional version of DevExtreme now: Download DevExtreme


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