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.
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.
Insert) by passing first Name, last Name, age as parameter.
Then I have instantiated Person BAL3 and calling Insert method of it (p BAL.
So what you need to do is store the data source (maybe in Session) and only bind rebind the data when you absolutely need to (Like during the Is Not Post Back) Do you understand?
Please post the code for your Page_Load method and the that handles your Update (your C# code) so we can have a better look at what's going on. Please give some references and/or details of how to. This wipes out the data provided by the user during editing (editing happens after the page load).
Download source code for 3-Tier Architecture in ASP. Seperation - the functionality is seperated from the data access and presentation so that it is more maintainable 2.
NET with C# 3-Tier architecture generally contains UI or Presentation Layer, Business Access Layer (BAL) or Business Logic Layer and Data Access Layer (DAL). Independence - layers are established so that if one is modified (to some extent) it will not affect other layers. Reusability - As the layers are seperated, it can exist as a module that can be reused by other application by referencing it.Please help me with writing a Row Updating function in C#, I don't know how to grab the current field's value and also get the old value for one of keys (which is Project Name for editing) of the selected row. the idea wa to don't allow binding the grid view after a post back. hello my problem was that my gridview editable controls heep their old values. this is due to the grid view binding in the page_load method after every post back. Now, create a class named Person BAL3 into App_Code folder by right clicking it and write respective methods for calling Insert, Delete, Update and Load methods of Data Access Layer class file (Person DAL3) (In my case I have a 3-Tier folder inside App_Code folder, you can directly add inside App_Code or you can create a separate project for BAL and add reference of this project into your Presentation Layer). In the above method, I am instantiating Person BAL3 and calling the Update method by p[assing required parameters. I am not goint into details of how I am connecting database and manipulating the data just to make this tutorials short. Code to Update records Above method will fire when Update link will be clicked for a particular row of the Grid View in edit mode. To list the record into Grid View that will also enable us to Edit, Delete record, copy paste following code.