3 Tier Architecture ASP.NET C# Call a method from BLL to code behind

Question

Hello I would like to ask, how can I call my method for saving that is in my BLL file (Employee.cs) to my code behind EmployeeRegister.aspx.cs?

I need to save what's written in the textboxes to my database, but I need to call first my method from my BLL. I am using 3-Tier Architecure, ASP.NET C# Webforms

Rijwan Ansari · Answer

In three tier Presentation/UI layer: ASPX page and code behind - use it to get data from user ie forms input from textbox and so on. - You can basic validation before sending to BL Business Layer: services/logic - use this layer for all logic and sending to Data Access layer for CRUD and so on - use get/send data to Presentation layer/DAL DAL: Simply Database operations Then DAL reference is added to BL and BL reference in added to Presentation Since your BL reference is added to presentation layer so you can call BL methods from UI layer.

Sachin Singh · Answer

BusinessEntities (BI--> Class Library) public Class Employee // simple class inside BI project { public int id{get;set;} public string Name{get;set;} public double Salary {get;set;} } BusinessLogic (BL---> Class Library (add reference of BI project)) public Interface IEmployeeService { public IEnumerable GetEmployees(); public Employee SaveEmployee(Employee emp); } public class EmployeeService:IEmployeeService { public IEnumerable GetEmployees() { List emps= new List (); // fetch from db using ADO/EF (if not using generic repository ) // SqlDataReader rdr= cmd.ExecuteReader(); while (rdr.Read()) { Employee emp= new Employee(); emp.Name= rdr[ "Name" ].ToString(); emp.Salary= Convert.ToDouble(rdr[ "Salary" ]); emps.Add(emp) } return emps; } // implemet all other methods } UI (Web Forms (add reference of BL project)) // EmployeeRegister.Aspx.cs EmployeeBL empBL= new EmployeeBL(); empBL.SaveEmployee( new Employee() { Name= txtName.Text; Salary= Convert.ToDouble(txtSalary.Text); }); Recommention:- use Dapper and pure SQL stored procedure instead of plain ADO.NET so that you won't need additional mapper for objects or writing own mappings from reader to employee object etc.

Satya Karki · Answer

Hi, Inside the button click method of your EmployeeRegister.aspx.cs (Presentation Layer), call your save method from Service(BLL). Firstly, reference the BLL to PL and DAL to BLL.

Jignesh Kumar · Answer

Hi, Please refer this article which will help you, https://www.c-sharpcorner.com/blogs/crud-operations-using-three-tier-in-asp-net1 https://www.c-sharpcorner.com/blogs/crud-operation-using-3tier-architecture-in-asp-net-with-jquery-validation https://www.c-sharpcorner.com/UploadFile/b8e86c/login-form-in-3-tier-architecture-with-lock-concept-in-asp-n/

Srinivasan Ramamoorthi · Answer

You can refer this article https://www.c-sharpcorner.com/UploadFile/4d9083/create-and-implement-3-tier-architecture-in-Asp-Net/?