October 2007 - Posts
This is an online image editor which allows quick editing of images already uploaded to a server running asp.net. It currently supports:
- Editing bmp, gif, jpg, and png images.
- Rotate 90 degrees.
- Crop
- Resize
- Undo/Redo
- Save
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A solution for loading user controls asynchronously via AJAX with no custom JavaScript required.
Yesterday evening in Dublin, Developers.ie and Verkom organized an interesting session wth our guest speaker Mike Culver from Amazon.
Mike's talk was about the different Web Services (S3 for example) Amazon propose now for all kind of projects.
Thanks to all the attendees (more than 150 according to the registration list, I think a record in Ireland for a .Net user group) and thanks also to Cormac Moore from Verkom for the logistic.
I had some interesting conversation with different people after the talk (around some beers of course) and it's nice to see that our meetings are now attracting developers from different horizons (Java, .Net, Linux, etc...). Good to see borders are fading.
I am working already on the next 'big' event in Dublin and I think it should be an exciting one too!
Slides and video of the event soon on Developers.ie!
The DataGrid is displayed without a single line of code in the Code Behind Page. the whole
functionaliy depends on Ajax and client side coding. no doubt we have a user control which
is used to bound the data.
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I am using 3-Tier architecture in my different projects, but adding a 4th tier is a novelty for me.
After reading this article, I can see the benefits to add a Business Access Layer in some complex scenarios.
From the author:
| Almost all of us must have heard about 3-Tier architecture but what is this 4-Tier architecture? What are the benefits and how it is different from other architectures? |
| |
Well, the architecture I am going to demonstrate here is just enhancement of 3-Tier archicture. In this architecture; you no need of writing long function parameters throughout the layers (as in traditionally 3-Tier archicture has to) and the actual objects of the application will be in a separate tier so that in future you can separately use these objects for enhancements. Change in the object definition can be done without touching the entire Business Access Layers ............
Let me explain you step-wise process of creatioin of 4-Tier architecture application.
In this application, I am going to take example of a Person that will have 3 properties: FirstName, LastName, Age. We will create a separate pages to insert these records (default.aspx) into database and list,update,delete records (list.aspx) from database.
In this application we will have following 4-Tiers
1. Business Object [BO]
2. Business Access Layer [BAL]
3. Data Access Layer [DAL]
4. UI (4-Tier) folder [UI] |
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This article examines how to use the ASP.NET AJAX Control named CollapsiblePanel with the help of a project
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Interesting example about implementing a LINQ extension to Flickr, so you can query for photos by tags, creation date, user id or title.
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In the current editor's draft of HTML 5, it is suggested that the alt attribute for img elements should no longer be required. The reasoning is that in some cases alt text will be omitted, regardless of whether it is required or not, so it might as well be made optional. Otherwise some authoring tools will automatically insert empty, repeated or meaningless alt text. At least that's how I understand the reasoning explained in Why the Alt Attribute May Be Omitted.
Basically it seems to come down to "Many people and many tools aren't using the alt attribute properly, and adding alt text to images uploaded to online photo galleries like Flickr is too much work for end users and tool developers, so the alt attribute should be made optional." Is that really the best solution though?
To help authors write useful alt text, the HTML 5 specification should provide guidance on that. I am pleased to see that the section describing the img element in the current draft does that well, except for the first example which seems a bit too long (and contains information that all users would benefit from). The rest of the examples are good. They could be worked on, but they are good.
Despite that guidance, there will always be cases where alt text is missing, either because of broken authoring tools or because of author ignorance or laziness. So the specification needs to define how user agents should handle missing alt attributes. In no way does that necessarily mean that images with missing alt attributes should be valid HTML 5.
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To follow my previous post on HTML emails, I should also mention the excellent gallery of different designs posted by Campaign Monitor.
Check here the galery...
By David Greiner:
This is a post I've been meaning to write for a long time now. I've been delaying it purely because I wanted it to be perfect. I wanted to write with Zeldman-like virtue on why email, just like the web, needs to pay attention to web standards. Sadly, in the time between the idea for this post and actually getting it published, web standards support in email has gone seriously downhill. I can't delay it any longer.
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