Author: Pawe Gowacki
In my previous post “Boian’s TBitmap Visualizer and converting to grayscale” I have described an algorithm for converting arbitrary TBitmap instances to gray using a selected formula. The problem is with the performance of the code that actually changes the color of each pixel. Accessing color information is done via TBitmap.Pixels property, which is a…
Updated: 28 November, 2021
Author: Craig Stuntz
What Is Homomorphic Encryption?
“Homomorphic” is an adjective which describes a property of an encryption scheme. That property, in simple terms, is the ability to perform computations on the ciphertext without…
Author: Craig Stuntz
As you’re probably aware, an Entity Framework model is stored in a single XML file, with the extension EDMX. Developers occasionally ask if this means that two people cannot work on the entity model concurrently. My answer to this is, “It…
join in LINQ to SQL and LINQ to Entities Considered Messy, Redundant
January 13, 2010
Author: Alf Christophersen
In this post I will demonstrate that use of the join keyword in LINQ to SQL and LINQ to Entities is nearly always wrong. LINQ queries which you write with the join keyword are harder to read and write than queries you write using associations, and they require knowledge of database metadata which is not required otherwise. This introduces the potential for errors and…
Author: Sinisa P29531
In my previous post I have translated Windows 7 SDK Direct2D “Advanced Geometries” examplefrom C++ to Delphi 2010 code. That was a lot of fun, so I have decided to continue the adventure in the realm of Direct2D programming and this…
Author: Darren Kosinski V1400
During the recent field test for RAD Studio 2010, I had a discussion with some field testers about the different mechanisms that the IDE provides for navigating through your source code. In particular, they were wondering why sometimes one…
Author: Adrian Z1428
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I am very happy I was granted permission to talk about the new features present in Delphi 2010 concerning database area.
DataSnap 2010 (DS2010) extended the list of server method parameter types with the full suite of JSON types.
It is now possible to pass a TJSONObject instance for example from a client process to a server as input or output parameter and…
Author: Craig Stuntz
I’m going to demonstrate how to use the open-source DayPilot Lite calendar control in an ASP.NET MVC application. I will discuss the capabilities of the control and consider the general problem of how to use controls designed for…
Author: Craig Stuntz
This is the fourth post in a series on using jqGrid with ASP.NET MVC. Today, we’re going to examine search and formatting results. I will implement a search feature and fix the problem with formatting date columns which I observed in the last post.
Author: Craig Stuntz
Having introduced jqGrid and written LINQ extension methods to make supplying data to the grid easy, we’re now ready to put together a demo application. The solution I’m going to build demonstrates sorting and paging. In a future post, I will enhance it to demonstrate search, formatting, and editing data. I’ve made the demo application available for download…
