eXpress Persistent Objects™ Blog

Just a short post to wish all Developer Express customers (but especially XAF and XPO customers ) a happy New Year and a prosperous 2009. It’s been a pleasure to work with the community for these...

Published Dec 31 2008, 12:54 PM by Gary Short (Developer Express)

In this post, and this post, we looked at how to create Criteria. The information in these posts still stands of course, but the preferred method of querying data is via LINQ and in this post I’ll show...

Published Dec 31 2008, 12:44 PM by Gary Short (Developer Express)

In a previous post we looked at two ways to create criteria and I finished by warning that those methods of criteria creation were not type safe. I also said that, as of DXperience 6.2 there was a way...

Published Dec 30 2008, 12:27 PM by Gary Short (Developer Express)

Wouldn’t it be great if you could just say to a database, “hey, give me all the customers and their orders where the order was placed this year and the value of the order is greater than the average...

Published Dec 16 2008, 07:40 AM by Gary Short (Developer Express)

It seems that the length of URLs gets bigger and bigger every hour. Here is a Google Maps URL: http://www.google.com/maps?f=qhl=engeocode=q=805+N.Brand+Glendale,+CA+91210sll=37.0625,-95.677068sspn=25.704151,53.789062ie=UTF8ll=34.154609,-118.245227spn=0.017419,0.033045z=16g=805+N.Brand+Glendale,+CA+91210iwloc=addrlayer=ccbll=34.158046,-118.255165panoid=O08NNpO077m501EOlXSgUwcbp=12,237.8462640496058,,0,-1.0291286092171708...

Published Dec 12 2008, 02:37 AM by Azret Botash (Developer Express)

When using persistent class hierarchies, you often have to combine base and derived classes in a single query. However, this is challenging since the derived classes obviously have an extended set of...

Published Dec 08 2008, 11:28 AM by Gary Short (Developer Express)

One of the disadvantages of being a Lowland Scot in general, and living between the river Tay and the Sidlaw Hills in particular, is the fact that the climate is much milder, so while the Highlands are...

Published Dec 05 2008, 09:30 AM by Gary Short (Developer Express)

By now, those of you who know me personally or through the forums and blogs know that I love Silverlight. It had me at hello. A rich client side user experience, cross platform*, tiny runtime. What's...

Published Dec 01 2008, 07:11 PM by Azret Botash (Developer Express)

So there we were at TechEd EMEA, Oliver and I, doing our little song and dance and bringing the good news of DevExpress to the people of Europe, when up pops a nice young lady and asks us if we want...

Published Nov 27 2008, 05:36 AM by Gary Short (Developer Express)

As you'll all know by now the DX team will be at Booth #501 at the PDC. Oliver and I will be there demonstrating XAF and XPO as well as talking about the new features coming down the pipe in 8.3 including...

Published Oct 24 2008, 06:23 PM by Gary Short (Developer Express)

Yes I'm in Edinburgh today, firstly for the MSDN event, looking at what's new in Visual Studio SP1. I'll be there making sure our ORM product (XPO) is still ahead of Microsoft's (Entity Framework) :-)...

Published Oct 16 2008, 04:47 AM by Gary Short (Developer Express)

This post is one in a series about our work on Domain Components (DC) framework and related component libraries. Im just describing what we are working on, what problems we are facing and what results...

Published Oct 01 2008, 05:00 AM by Roman Eremin

This post is one in a series about our work on Domain Components (DC) framework and related component libraries. Im just describing what we are working on, what problems we are facing and what results...

Published Sep 30 2008, 04:31 AM by Roman Eremin

This post is one in a series about our work on Domain Components (DC) framework and related component libraries. Im just describing what we are working on, what problems we are facing and what results...

Published Sep 30 2008, 04:29 AM by Roman Eremin

This post is one in a series about our work on Domain Components (DC) framework and related component libraries. I’m just describing what we are working on, what problems we are facing and what results...

Published Sep 29 2008, 04:22 AM by Roman Eremin

Well day three of the conference was good; the delegates seemed a little tired (possibly due to the long hours that they worked at the conference) and they didn't seem much interested in hearing about...

Published Sep 27 2008, 02:47 PM by Gary Short (Developer Express)

In the first post of the series devoted to our new domain component (DC) technology, I tried to show an interface-defined entity in a UI. I used some IPerson component as an example: public enum...

Published Sep 26 2008, 03:38 AM by Roman Eremin

It was another brisk day on the booth yesterday. There was a lot of interest in XAF and XPO, as there was on the first day. However, yesterday also saw a lot of interest in our WPF grid, with many people...

Published Sep 25 2008, 03:27 AM by Gary Short (Developer Express)

Oliver and I are off to the BASTA conference in Germany where we’ll be flying the DevExpress flag. So, as always, if there are any of our customers attending the conference, don’t forget to stop by the...

Published Sep 18 2008, 01:11 PM by Gary Short (Developer Express)

I love my granny, as all of us who are fortunate enough still to have one alive do I’m sure. My granny hails from Highland Perthshire and is, as we say in Scotland, of farming stock; that is to say that,...

Published Sep 16 2008, 06:45 AM by Gary Short (Developer Express)

Hard on the heels of his first post, Gary Cox is back again, taking advantage of our “Starring You” slot, to tell us about two way binding in XPO. Remember, if you have a favourite tip or trick and...

Published Sep 11 2008, 09:25 AM by Gary Short (Developer Express)

In the first of our “Starring You” slots, Gary Cox shows us how to use the email address as the user name when using XPO. Don’t forget, if you have a great XPO or XAF tip that you think other users could...

Published Sep 09 2008, 07:13 AM by Gary Short (Developer Express)

while I’m busy pushing out the XAF and XPO cookbooks and the more advanced version, which I’ve decided to call Black Belt XAF/XPO for no other reason that it makes me sound tough; it occurred to me,...

Published Sep 08 2008, 09:02 AM by Gary Short (Developer Express)

It used to be that in any thin client application that you build, you would spent most time worrying about how to bring your data to the client and then how to properly submit your changes back. These...

Published Sep 04 2008, 04:16 PM by Azret Botash (Developer Express)

So this morning I received an email which basically said “Hey, stop writing basic stuff on XPO and XAF and start writing about the advanced stuff that I need to know about. The community can look...

Published Sep 04 2008, 05:12 AM by Gary Short (Developer Express)