Tags: aspx

ASP.NET/C# image resizer for responsive layouts

I will probably elaborate on this a bit further when I find some more time, but for now, this post is going to be mostly code. What I have here is a relatively simple way to generate images that are resized server-side based on the screen dimensions (note: not window dimensions) of the web browser requesting them. This way, you’re not sending huge images to phones. Pair this with some CSS to scale your images to fit their containers, and you’re cooking with gas! Read More →

LDAP authentication with C#

LDAP, or Lightweight Directory Access Protocol, is a convenient, central repository for a system’s personnel information. LDAP (and other Active Directory services) are widely-used by organizations big and small to consolidate user credentials and identification data. For instance: a reporting services application, a webmail client, and a database administration suite can all read from the same Directory, with no need for replicating user information. John Doe only has to remember one password for all systems. When he changes it, those changes cascade across the board. Read More →

Programmatically compile Audiences in SharePoint 2010

According to the documentation for the SharePoint 2010 SDK, you cannot trigger Audience compilation programmatically. Well—that’s not true. It isn’t documented, but it is possible. The painful thing about it is that you must know the ApplicationId of the UserProfileService application. This is where reflection comes in extremely handy! Read More →

Simple file access concurrency in C#

When working without the safety net of a RDBMS in a multi-user environment, file concurrency may become an issue. In a project I’ve been working on recently, XML files are being used as the custom data store. This is all fine and dandy for now—with a user base of 1 (myself)—but when the app is released “into the wild”, concurrency may become a serious problem.

To remedy this problem (in a simple, no-nonsense fashion), I have been relying on a mutex file to exclude concurrent writes to the XML data store; it has been holding up just fine in my simulated scenarios. The mutex allows for one web request to read in the XML, modify it, and write back to it without being usurped by concurrent requests. There is a fail-safe mechanism which will wait for up to 3 seconds (30 attempts to lock the file) before failing outright. Read More →