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Business Access Layer (BAL) or Business Logic Layer BAL contains business logic, validations or calculations related with the data, if needed. Data Access Layer (DAL) DAL contains methods that helps business layer to connect the data and perform required action, might be returning data or manipulating data (insert, update, delete etc). Connect me on | https://twitter.com/sheonarayan | Hi, Nice article; Well and simply explained.For this demo application, I have taken a very simple example. 1) Fix for the code block For the css 'pre', add new property 'min-width: 730px;' and add width nn percentage.
Presentation Layer (UI) Presentation layer cotains pages like or windows form where data is presented to the user or input is taken from the user. Hope this article helped you understanding 3-Tier architecture and desiging it. Updated on July 01 2008: Source Code attached Full Name: Sheo Narayan Member Level: Honorary Platinum Member Status: Administrator Member Since: 7/8/2008 PMCountry: India Regards, Sheo Narayan MVP, Author, Writer, Mentor & architecting applications since year 2001.
The first 4 records are already present in the Table, the only difference is that the countries of some records are modified for illustrating the bulk update operation.
3-Tier architecture is a very well know buzz word in the world of software development whether it web based or desktop based. Below is the code for BAL (Your can overwrite your default written code for the class file by pasting this code). You can also navigate to another page your created (list.aspx) and try updating, deleting records.
It first performs UPDATE using INNER JOIN and then INSERTS all records that are not present in the table.
In this article I am populating the Grid View using the following XML file in the Page Load event.