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XPO

eXpress Persistent Objects

XPO - 11.2 Sneak Peek – XPCollection performance improvements (once again!)

Prerequisites As you probably know, when inserting or removing records from collections supporting IBindingList , it is necessary to load the entire collection (that means constructing its persistent objects and their related objects graphs) from the...

Posted Sep 13 2011, 08:00 AM by Dennis (DevExpress Support) with | with 15 comment(s)

Filed under: XPO, performance, 11.2, inserting, XPCollection, deleting, removing, adding

Performance boost on removing data from a large XPCollection (available in 11.1.7)

I am happy to announce that XPO developers have tweaked XPCollection in version 11.1.7 , and trust me, it is something you will notice immediately. This improvement was accomplished while working on a customer's issue and that again proves how customer...

Posted Sep 12 2011, 08:40 AM by Dennis (DevExpress Support) with | with 5 comment(s)

Filed under: XPO, performance, XPCollection, deleting, removing, 11.1.7

Profiling medium trust web applications

Our profiler uses WCF in order to communicate with the client application. One of the benefits of the XPOProfiler is that it supports 2 binding types. Both binding types have their advantages however in this situation only one allows us the flexibility...

Posted Aug 29 2011, 07:08 AM by Apostolis Bekiaris (DevExpress) with | with no comments

Filed under: XPO, profiling tool

XPO–11.2 Sneak Peek - Auto-generated Int64 keys

We are not far from 11.1 and I presume that you will be surprised to see 11.2 sneak peeks at this time There is not actually not much to say here, because the subject says it all. Starting from version 11.2 you can define a Int64 (long) key property in...

Posted Jul 28 2011, 08:30 AM by Dennis (DevExpress Support) with | with 15 comment(s)

Filed under: XPO, 11.2, Int64, PK, long, auto-generated, key

XPO – 11.1 Sneak Peek - WCF services for IObjectLayer

In the two previous blog posts, we already described how to provide the IDataStore and ICachedDataStore implementations, working via WCF Services. In this blog post, we will talk about implementing a distributed object layer service ( IObjectLayer/ISerializableObjectLayer...

Posted May 17 2011, 06:10 PM by Dennis (DevExpress Support) with | with 12 comment(s)

Filed under: XPO, 11.1, IDataStore, WCF, distributed applications, service, v2011 vol1, v2011.1, ISerializableObjectLayer, IObjectLayer

XPO – 11.1 Sneak Peek – IDataStore WCF Service in Silverlight

In this blog post we will talk about peculiarities of using IDataStore WCF services in Silverlight projects. As you guess, the main restriction is that all inquiries should be performed asynchronously or rather should not block the UI thread. Let’s extend...

Posted May 16 2011, 04:30 AM by Dennis (DevExpress Support) with | with 4 comment(s)

Filed under: XPO, 11.1, IDataStore, WCF, v2011 vol1, asynchronous, SL, Silverlight, v2011.1

XPO – 11.1 Sneak Peek – Data binding in WPF

In this blog post, we are going to demonstrate how to use a new XPObservableAssociationList<T> class in the DevExpress.Xpo.Linq library for data binding to persistent classes in WPF . First, we will create a new WPF Application project. Then, we...

Posted May 16 2011, 04:00 AM by Dennis (DevExpress Support) with | with 1 comment(s)

Filed under: XPO, LINQ, 11.1, WPF, data binding, XPObservableAssociationList, v2011.1

XPO – 11.1 Sneak Peek - Profile it!

Introduction We have one more amazing piece of news for our XPO customers. In version v2011 vol 1, we have implemented XPO Profiler - an external profiling tool for XPO-based business applications, allowing you to track internal events in the underlying...

Posted May 04 2011, 04:10 AM by Dennis (DevExpress Support) with | with 11 comment(s)

Filed under: XPO, SQL, 11.1, performance, profiling tool, bottleneck, v2011 vol1, v2011.1

XPO – 11.1 Sneak Peek – Data caching improvements

Introduction First, we would like to refresh your memory and return to the distant past and our old posts about data caching in XPO: · XPO is good for distributed applications · ...

Posted Apr 21 2011, 01:30 PM by Dennis (DevExpress Support) with | with 10 comment(s)

Filed under: XPO, 11.1, IDataStore, WCF, distributed applications, service, data caching, SQLDependency, v2011.1

XPO – 11.1 Sneak Peek - WCF services for IDataStore

In XPO v2011.1 vol 1, we added support for WCF Services. These improvements provide the capability to create service and client for IDataStore as easy as it can only be. In order to support this feature, the DevExpress.Xpo assembly will reference assemblies...

Posted Apr 19 2011, 02:30 AM by Dennis (DevExpress Support) with | with 25 comment(s)

Filed under: XPO, IDataStore, WCF, distributed applications, service, v2011.1

XPO – 11.1 Sneak Peek – Support for the OUTER APPLY operator in SQL queries

We have some good news for our XPO users. In v2011 vol1 we have improved our sql-generator by supporting the OUTER APPLY operator. This SQL operator enables you to create an aggregate’s sub queries outside the WHERE clause and the SELECT expressions...

Posted Mar 22 2011, 09:00 AM by Dennis (DevExpress Support) with | with 4 comment(s)

Filed under: XPO, SQL, OUTER APPLY, 11.1, v2011.1

XPO to Database Connectivity: Mastering Fork Etiquette

Check out this how-to article that shows a new way of setting up XPO to work with websites, where a large number of simultaneously connected users is a common occurrence. It may help you reduce server response latency for pages that depend on data supplied...

Posted Jul 06 2010, 06:24 AM by Nick (DevExpress Support) with | with 7 comment(s)

Filed under: XPO

ANN: DXCore XPO Plugin 1.2.0.3

Version 1.2.0.3 of the XPO plugin is now available, compiled against DXCore 8.3.4. Please download it here: CR_XPOFieldSync-1.2.0.3.zip (23174 bytes) As always, if you're not familiar with the purpose of the XPO plugin, please read this description...

Posted Apr 01 2009, 06:15 PM by Oliver Sturm (DevExpress) with | with 19 comment(s)

Filed under: XPO, DXCore

Using SQL Server 2008 spatial data from XPO

Boris posted me some code that I used to play around with, in order to make XPO work with SQL Server 2008 spatial data . It is possible to make it work, quite easily actually, but there are a few things that need to be considered, and where more than...

Posted Aug 19 2008, 03:00 PM by Oliver Sturm (DevExpress) with | with 6 comment(s)

Filed under: XPO

XPO and FILESTREAM - update

Yesterday I wrote about using the new SQL Server 2008 FILESTREAM feature with XPO , and this morning Boris from our XPO team sent me an IM going "na na na, I found an easier way to do this". Okay, maybe he didn't quite put it like that ...

Posted Aug 15 2008, 11:40 AM by Oliver Sturm (DevExpress) with | with 3 comment(s)

Filed under: XPO

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XPO

XPO - 11.2 Sneak Peek – XPCollection performance improvements (once again!)

Performance boost on removing data from a large XPCollection (available in 11.1.7)

Profiling medium trust web applications

XPO–11.2 Sneak Peek - Auto-generated Int64 keys

XPO – 11.1 Sneak Peek - WCF services for IObjectLayer

XPO – 11.1 Sneak Peek – IDataStore WCF Service in Silverlight

XPO – 11.1 Sneak Peek – Data binding in WPF

XPO – 11.1 Sneak Peek - Profile it!

XPO – 11.1 Sneak Peek – Data caching improvements

XPO – 11.1 Sneak Peek - WCF services for IDataStore

XPO – 11.1 Sneak Peek – Support for the OUTER APPLY operator in SQL queries

XPO to Database Connectivity: Mastering Fork Etiquette

ANN: DXCore XPO Plugin 1.2.0.3

Using SQL Server 2008 spatial data from XPO

XPO and FILESTREAM - update