New YouTube Channel and XAFers Training

Yes I did, inspired by my friend and DevExpress MVP Joche I decided to give it a try and start my own channel, also Javier Suarez in .Net Conf Xamarin sounds like me (a thick Spanish accent) so why not? If you are interested in XAF, XPO and Xamarin (and if you are here, you probably are) then subscribe and I will try to have new content every 15 days or at least monthly.

What would you guys think about a series of videos reviewing all XAF modules, the ones from DevExpress first and then all modules done by the community?

Here is the link for the channel:

Lastly, I am really excited to say that is finally live. We plan to host sessions two Saturdays a month covering XAF, XPO, Xamarin and a lot more. We are starting with 5 courses:

Well, that is it for today. See you next time. XAF out!

XAF Web – Add CSS Style

First, I have to admit CSS and Javascript are not my stronger points. With that out of the way, some times a simple change makes a big difference in the appearance of your app.

Well, let’s change the color of the header bar in our XAF Web application.

public class AddStyleController : ViewController

        protected override void OnViewControlsCreated()

            LiteralControl style = new LiteralControl();
            style.Text = "<style type='text/css' scoped>.white { background-color: palegreen; }</style>";


And good to go:

Source Code:

Until next time, XAF out!


Speaker Invitation to CodeCamp Santo Domingo

I am really excited to say I was invited to speak at CodeCampSDQ. My talk would be about Real world experiences using advanced ORMs in the mobile ecosystem. Translation: I will be talking about XPO and Xamarin.

Abstract: In this talk, I will guide you on why and how to choose an ORM that reduces the cost of development, makes your model database-agnostic while keeping a consistent performance.

Date is May 30 so I hope to see a few of you over there 🙂

Update: Conference has been postponed due to COVID-19. There is not new date set yet so I will update it here as soon as I have more information.

Can’t wait!

See you next time. XAF out!

XAF Win – Actions Placement in the Ribbon

When talking about actions placement we have a lot of choices. We can change the action container in the model or if doing it by code:

public class MyViewController : ViewController {
    public MyViewController() {
        SimpleAction myAction = new SimpleAction(this, "MyAction", "View");
        myAction.ImageName = "Action_SimpleAction";

Here we can change the category (“View”) that map to that action container and that will be enough. We can also change the index inside the action container if we need a specific order. We can create a new Ribbon Template like shown here. A little cumbersome right? But what do we do if we want to have our action in a separate RibbonGroup and/or RibbonPage?

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XAF Win Image in ListView Grouping

Following last post about grouping selection in a ListView this time we will focus on adding an image to display when grouping. (if my words don’t paint a complete picture refer to the image above).

This can be useful for example for products and categories. You can display a picture of the Category certain products belong and show those products when expanding the group. Let’s take a look:

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