XAF Web Multiple Files Upload


Reading the support tickets daily it has become one of my most rewarding morning routines. Besides the constant learning factor, I am all the time running into some amazing questions / implementations/ samples that I can put in practice right away.

I have said it before but I will reiterate here:

When presented with a XAF challenge the first thing I do it is a quick search trough the support tickets to see if there is already an implementation that I can adapt to my needs. Most of the time I find something that I can use, but also most of the time I have to actually code it and run it to see if it is exactly what I need it.

If you are like me, you would love to have a visual before getting to deep and realizing I am on the wrong path. I also realize DevExpress receives tons of tickets daily so this is not feasible for them.

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Caribbean Developers Conference ūüß®ūüß®

“He is talking again about conferences. Yeah, Yeah, we know, they are great.”

Well, before you run away, hear me out. This time I have a different point. Yes conferences are great and CDC is one of my favorites but what no one talk about is, they are a lot of work for the organizers.

I had the opportunity to be part of the staff of CDC 2019 and  I have to give a big shout out to the Megsoft team for all their hard work  and for making this event possible.


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VSIX for XAF Model Editor (OBSOLETE)

OBSOLETE: Please use the Xpand.XAF.ModelEditor package that contains a standalone version of XAF Model Editor, designed to integrate with Visual Studio, Rider, Explore.

Also coming soon is the Model Editor for .NET Core and .NET Standard Projects. Read the announcement here.

If you’ve¬† unloaded your csproj and take a look you’ve seen how cumbersome they can be and¬† you must probably know how much simpler, leaner the new sdk project is. In Hanselman words:

“It lets you manage all project dependencies in one place and gives you and uncluttered view of top-level dependencies.”

And that statement above it is crucial for a smooth CI/CD flow.

We also won’t be needing to have DevExpress assemblies installed in the GAC we could use Nugets and have our projects in as many different versions as we want.

One really neat tool that help you with the migration is CsprojToVs2017 or if you prefer to do it manually you can follow this post.

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Uno Platform and XPO

As a proof of concept I wanted to give a try of using Uno Platform and XPO together. Uno has been gaining popularity and I have to say that after this I will have a tough decision on the framework selection for my next mobile project. I love Xamarin but the benefits that Uno brings to the table are hard to pass.

From their own website:

  • Uno-built native apps can be compiled to WASM with no additional development efforts!
  • Ramp up time is minimal and you can take advantage of all that the Visual Studio ecosystem has to offer for testing, deploying, project management, and more.

What that means to us?

First, A web front end thanks to web assembly (I honestly don’t know why Xamarin has not invested in this route yet. Besides Ooui¬†that I believe it is awesome but not even close to production, there is nothing else out there)

Update: UNO has WebAssembly Renderers for Xamarin Forms.

And second, a UWP first approach where all the VS tooling just work. Including Designers, Hot reload, Brushes and more.

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ReactiveUI + Xamarin Forms + Prism

If you guys have not use this combination I strongly suggest to give it a try. Prism handles navigation like a boss, ReactiveUI makes your code readable that you will comeback 6 months from today and you will still be able to pick it up fairly quickly (that is not the only reason of course but one of the most appealing for me) and Xamarin Forms (no need for introductions here).

If you have never used Prism or ReactiveUI I recommend:

Prism in Xamarin Forms Step by Step by Xamgirl.


You, I, and ReactiveUI by Kent Boogaart.

Now, How do we use them together?

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XAF to Xamarin Teaser

I know I still owe you guys the complete article about the XAF POS Teaser but I could not help it. Here is a quick XAF to Xamarin Teaser.


  • ORM in NET Standard library to share between XAF and Xamarin.
  • Custom IDataStore Implementation in ASP.Net Core Web API.
  • Shared Authentication between XAF and Xamarin
  • Support for Direct SQL Queries with XPO
  • Win, Web, Android, iOS, UWP. (UNO coming soon)
  • Using Syncfusion Data Grid because DevExpress Data Grid for Xamarin is still not on Nuget.¬†(You can also use a ListView,¬† CollectionView, etc)
  • Not showing in the teaser: XAF Reports in Xamarin using Syncfusion PDF Viewer.
  • Not showing in the teaser: Multiple IDataStore implementation to support multiple databases in the same application.

I am really happy about this template. I believe it will save a ton of time. As always feel free to reach out with any question/suggestion or if you are struggling trying to make your XAF project mobile.

Xafmarin out!

Meeting Dave and Adam -DevExpress MVPs

For the Xamarin Saturday on August 24 I traveled to Toronto, as we all know from my last post. One thing I did not mention there because I wanted to have a special post just for this was that I had the opportunity and honor to finally meet in person Dave Hesketh and Adam Latimer current DevExpress MVPs.

I want to say thanks to both for making the trip from Orangeville. I have been following their work for a couple years already and my XAF POS Teaser includes code from their Free Modules.

We had a  great talk about XAF, XPO, Blazor, Xamarin and more. Continue reading