DotNetKicks.com - Stories tagged with LINQ

Reactive Programming in C#, F# and VB - Useful Reactive LINQ Operators

Fri, 21 Nov 2008 22:33:44 GMT

In the previous article, I introduced Reactive LINQ. Today, we're going to look at other operators that canbe used for working with events. We'll see aggregation is useful and how to dynamically change (switch) behavior.

Trips&Ticks: Do you know how you can cast Object to AnonymousType?

Fri, 21 Nov 2008 22:14:33 GMT

I experimented with LINQ in my private project and question that was showed in title took me. I had next situation:

Random Sort a List Using LINQ

Fri, 21 Nov 2008 13:22:14 GMT

LINQ (Language Integrated Query) is a one of very useful feature of .net 3.5 framework. This allows you to query objects and perform complex operations simply and efficiently. There are lots of trick which can be used with the help of LINQ. In this article I am explaining how can we random sort a List using LINQ

RIA in Sharepoint: Silverlight with 3D Extended DeepZoom - so cool

Thu, 20 Nov 2008 05:04:50 GMT

NOTE: There is an interesting contest to find an image in this. Check the post. Long story short, this is an effort to bring RIA to the SharePoint world. But not just RIA style usability, I believe we pushed the envelope even further by incorporating not only DeepZoom (SeaDragon) for 'zoom in to the pixel' resolution, but the 3D extensions not present by default (you have the essentials but only the amazingly talented people behind the Hard Rock Memorabilia site (vertigo) have shown this style of combined zoom/3d that we have seen in any largely deployed sample)

Quick and Dirty LINQ to SQL Debugging in ASP.NET : LeeDumond.com

Thu, 20 Nov 2008 03:00:33 GMT

Sometimes, for debugging purposes, it's important to determine the T-SQL that's being issued to the database when a LINQ to SQL query executes. Probably the easiest way to do this is to fire up SQL Server Profiler. That's fine, as long as you're using a full or Developer edition of SQL Server. Unfortunately, however, SQL Server Profiler is not available to SQL Express Edition users.

Reactive programming (II.) - Introducing Reactive LINQ

Wed, 19 Nov 2008 19:53:06 GMT

In the second part of the series about reactive programming, I introduction the Reactive LINQ project, which allows writing event processing code in C# using LINQ queries.

Dynamic Sort With LINQ To SQL

Wed, 19 Nov 2008 12:12:50 GMT

Sometime ago I wrote a post showing how to do dynamic sort with LINQ. That approach worked well with LINQ To Objects. Today I spotted a question on the forums where Levi asked a question about doing dynamic sorts with LINQ To SQL. My earlier approach will work once all the data is retrieved on the client side. This of course is not an ideal way. A better option is to do sorting on database.

About Disposing the DataContext : LeeDumond.com

Wed, 19 Nov 2008 08:10:44 GMT

It seems there is a lot of confusion amongst .NET developers about whether or not to dispose the DataContext in LINQ to SQL. That being the case, I'll throw my two cents, and in the process hopefully not confuse the issue even more.

LINQ Method cannot be translated into a store expression.

Tue, 18 Nov 2008 11:53:13 GMT

A short snippet/workaround if you ever see the following exception: LINQ to Entities does not recognize the method ... , and this method cannot be translated into a store expression. It is thrown because in the Entity Framework Custom Methods & Extension Methods cannot be translated into a store expression.

Enum Support With LINQ To SQL And SqlMetal

Tue, 18 Nov 2008 11:34:05 GMT

As a programmer I love my enums. I find code written using enums to be more readable than without them. However, there has been and there still is a disconnect between lookup tables in a database and enums in code. One has to restore to some creative trickery to get them working in harmony. Recently while working on a project which involves using LINQ To SQL, I came up with a process which gives me the best of both worlds i.e. using lookup tables in database and enums in code. I am documenting my solution here. Hopefully it will help you.

Entity Framework - Some common hurdles

Tue, 18 Nov 2008 10:21:08 GMT

This is a post that tries to address some of the "issues" in the Entity Framework such as 'Eager Loading' and 'Change Tracking'

Reactive programming (I.) - First class events in F#

Tue, 18 Nov 2008 00:04:40 GMT

The LINQ project and changes in C# 3.0 are interesting because they allow implementing many ideas from functional languages in C#. In this article I'll explain "first-class events" in F# and later I'll implemet similar concept using LINQ.

How to serialize Lambda Expressions

Sun, 16 Nov 2008 22:38:49 GMT

At times I need to serialize my Lambda Expressions, to pass to some web service . Normally this wasn't possible but I realized the MetaLinq project allows it.

Stephen Forte talks about LINQ to REST

Sun, 16 Nov 2008 06:18:54 GMT

Mr. Forte gives nice little introduction to LINQ to REST with ADO.NET Data Services.

IUpdateable for Linq To Sql - Make Linq to Sql a read/write data

Sun, 16 Nov 2008 06:03:13 GMT

Post demostrates how to make Linq to Sql a read/ write data source for ADO.NET Data Services.

ASP.NET MVC Tip #34 - Dispose of Your DataContext (or Don't)

Fri, 14 Nov 2008 15:16:14 GMT

In this tip, the author demonstrate how you can dispose of a DataContext within an ASP.NET MVC controller. Next, he argues that there is no compelling reason to do this.

Testable Data Access With The Repository Pattern

Fri, 14 Nov 2008 06:59:03 GMT

A sample implementation of an in-memory repository for consistent data access during testing.

Strongly typed links for ASP.NET MVC using LINQ

Thu, 13 Nov 2008 22:01:49 GMT

An alternative to the ActionLink method which doesn't rely on strings and anonymous types.

LINQ to SQL: How to convert Subsonic project to LINQ to SQL?

Wed, 12 Nov 2008 13:17:37 GMT

About year and half I started to use Subsonic. This is a great tool. It made my life easier.? However, I kept asking myself: "Why Microsoft doesn't have anything like this?". Then I heard about LINQ. Finally in February Visual Studio 2008 was released. However, still almost nobody uses LINQ to SQL in commercial projects. I did several attempts to convert some of my projects (one of this attempts this web site) from Subsonic to LINQ to SQL.

LINQ - How to build RSS feed using LINQ to SQL

Wed, 12 Nov 2008 02:15:28 GMT

How to build RSS feed using LINQ to SQL for your ASP.NET website.

Some Common Operations using LINQ To XML - Part II

Tue, 18 Nov 2008 11:16:14 GMT

In this article, we will explore some common 'How Do I' kind of examples using LINQ to XML. This article is the Part II of the 3-part LINQ to XML series.

Building an RSS Ticker in C# using WPF and LINQ

Tue, 11 Nov 2008 01:12:22 GMT

Create an application that downloads RSS, RDF and ATOM data and displays it in a ticker that scrolls using WPF animations.

LINQ to XML - XPath

Mon, 10 Nov 2008 10:24:02 GMT

LINQ to SQL may be on it's way out, but LINQ is no way out at all! And don't worry about LINQ to SQL, the ADO.NET Entity Framework is available and guess what it's awesome. Another good usage for LINQ is when you need to query an XML file. When working with LINQ to XML you may remember the old days when you used XPath. But don't worry anymore there is support for XPath on LINQ to XML. There are extension methods for LINQ to XML in the System.Xml.Xpath namespace! Read this blog post if you are interested in an example, and find out if there are any performance issues! Have fun reading!

.NET Language Integrated Query for XML

Mon, 10 Nov 2008 03:58:38 GMT

This is the overview of .NET Integrated Language Query for XML. This Article explains some of the features of XLINQ with example.

ADO.NET v LINQ to SQL

Mon, 10 Nov 2008 03:36:15 GMT

I talk a little bit about the potential for LINQ to SQL to go DOA.