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Data Access Layer Lets proceed with desiging 3-Tier architecture. Add a class named by right clicking App_Code folder. Because the new buzz in the industry is to use Ajax Tab Panels. As you have used four variables to pass data from one layer to another (person ID, first Name, last Name, age).
(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 DAL and add reference of this project into your BAL.) and copy-paste folowing code (Your can overwrite your default written code for the class file by pasting this code). Tab Container (Container to hold GV, Add, Edit) First Tab Panel ... Now think the Scenario when the number of fields are too much.
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.
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.
I am not getting anything back when I read it by using the row. So why am I not getting values back from my text box control fields, and the one textbox field? Your suggestion did not work, and I assume it is because the Grid View does not have an ID for each Grid View column field. Instead, find the Text Box for each column in the Controls collection of the Cell for that column. Please remember to click “Mark as Answer” on the post that helps you.
I have separate method for inserting, deleting, updating records into database and loading records from database. In the above code, I am instantiating Person BAL3 and calling Delete method by passing person ID as parameter so that select reocrds will be deleted from datbase.
Sql Client; /// In the above code, I have a member variable called conn Str that is getting database connection string from my web.config file that is being used through out the class. Code for Grid View Data Key Names="Person ID" Auto Generate Edit Button="True" Auto Generate Columns="False" On Row Editing="Edit Record" On Row Updating="Update Record" On Row Canceling Edit="Cancel Record" On Row Deleting="Delete Record" Page Size="5" Above method will fire when Delete link will be clicked on the Grid View.
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.
Here, I have assumed that you will create the respective stored procedure yourself into the database or you may download attachment from using System; using System. In this case definitely the passing number of variable will not be good idea.