{"id":752,"date":"2023-06-20T07:01:31","date_gmt":"2023-06-20T07:01:31","guid":{"rendered":"https:\/\/www.softwaretraininginchennai.com\/blog\/?p=752"},"modified":"2026-01-05T07:30:38","modified_gmt":"2026-01-05T07:30:38","slug":"three-tier-three-layer-architecture","status":"publish","type":"post","link":"https:\/\/www.softwaretraininginchennai.com\/blog\/three-tier-three-layer-architecture\/","title":{"rendered":"Three Tier Architecture in MVC"},"content":{"rendered":"\r\n

Three Tier (Three Layer) Architecture<\/u><\/strong><\/u><\/p>\r\n\r\n\r\n\r\n

With a three-layer design, the project is divided into three layers: the user interface layer, the business layer, and the data layer (database), where we divide the UI, logic, and data into three groups. If a user wants to switch the user interface from a Windows computer to a smartphone, he or she simply needs to alter the UI layer; all other layers are unaffected. Like this, if a user wishes to change a database, he simply needs to update the data layer; everything else stays the same.<\/p>\r\n\r\n\r\n\r\n

The widely used three-tier (or three-layer) architecture is a way to organise the codebase. This architecture divides the codebase into three distinct levels, each with a unique set of duties:<\/p>\r\n\r\n\r\n\r\n

\r\n
\"\"<\/figure>\r\n<\/figure>\r\n\r\n\r\n\r\n

Presentation layer:<\/strong>\u00a0This is the application’s user interface, which shows the user the features and data of the programme.<\/p>\r\n\r\n\r\n\r\n

Business logic (or Application) layer:<\/strong>\u00a0The business logic that powers the application’s essential features is contained in this layer. as processing the data moving between the other two layers and making judgements, calculations, and evaluations.<\/p>\r\n\r\n\r\n\r\n

Data access layer (or Data) layer:<\/strong>\u00a0To save and recover application data, this layer communicates with databases.<\/p>\r\n\r\n\r\n\r\n

Advantages of using three-tier architecture are:<\/em><\/strong><\/p>\r\n\r\n\r\n\r\n

Accelerated development:<\/strong> Reducing product time to market and enabling developers to use the most current tools and layer appropriate languages.<\/p>\r\n\r\n\r\n\r\n

Improved scalability:<\/strong>\u00a0 By deploying apps on many levels, each tier may always be scaled separately.<\/p>\r\n\r\n\r\n\r\n

Improved Reliability:<\/strong> By using several tiers, you may execute additional components of your application on other servers and employ results that have been cached to improve reliability and availability.<\/p>\r\n\r\n\r\n\r\n

Enhance security:<\/strong> By using a well-designed application layer as a private firewall to help avoid receptive weaknesses like SQL injection.<\/p>\r\n\r\n\r\n\r\n

The package of different layers is as follows.<\/p>\r\n\r\n\r\n\r\n

    \r\n
  • Presentation Layer – controller package<\/em><\/li>\r\n\r\n\r\n\r\n
  • Business Logic Layer – service package<\/em><\/li>\r\n\r\n\r\n\r\n
  • Data Access Layer – repository package\u00a0<\/em><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n

    Three Layer Architecture using MVC Sample:<\/u><\/strong><\/p>\r\n\r\n\r\n\r\n

    Create an empty MVC web application project with Project name \u201cWebApp\u201d and solution name \u201cTLA\u201d. This WebApp project is the presentation layer.<\/p>\r\n\r\n\r\n\r\n

    In Solution TLA, add a new project to create business logic \u00e0 Class library (.net framewok) \u00e0 name the project as BusinessLayer.<\/p>\r\n\r\n\r\n\r\n

    Again, in Solution TLA, add a new project to create data access \u00e0 Class library (.net framewok) \u00e0 name the project as DataBaseLayer.
    Add BusinessLayer & DataBaseLayer as reference in \u201cWebApp\u201d.<\/p>\r\n\r\n\r\n\r\n

    Add BusinessLayer as reference in \u201cDataBaseLayer\u201d.<\/p>\r\n\r\n\r\n\r\n

    In sql server explorer, add a new database with name \u201cMYDB\u201d and create a table with name \u201cRegistration\u201d.<\/p>\r\n\r\n\r\n\r\n

    \r\n\r\n\r\n\r\n
    CREATE TABLE [dbo].[Registration](
    [RegId] [int] IDENTITY(1,1) NOT NULL,
    [FullName] varchar NULL,
    [Address] varchar NULL,
    [Gender] varchar NULL,
    [City] varchar NULL,
    [DoB] [date] NULL,
    [Cno] varchar NULL,
    PRIMARY KEY CLUSTERED ([RegId] ASC)<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n

    In \u201cDataBaseLayer\u201d, add the model file using \u201cado.net entity data model\u201d.<\/p>\r\n\r\n\r\n\r\n

    Once model is created, copy the connection string from app.config of \u201cDataBaseLayer\u201d and paste it in web.config of \u201cWebApp\u201d.<\/p>\r\n\r\n\r\n\r\n

    In \u201cBusinessLayer\u201d, create a class file with name \u201cRegistrationModel\u201d and replace with below snippet.<\/p>\r\n\r\n\r\n\r\n

    \r\n\r\n\r\n\r\n
    public class RegistrationModel
    {
    public int RegId { get; set; }
    public string FullName { get; set; }
    public string Address { get; set; }
    public string Gender { get; set; }
    public string City { get; set; }
    public Nullable DoB { get; set; }
    public string Cno { get; set; }
    }<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n

    In \u201cDataBaseLayer\u201d, add a new folder with name \u201cDBOperation\u201d, in it, add a class file with name \u201cManageRegistration\u201d and replace with below snippet.<\/p>\r\n\r\n\r\n\r\n

    \r\n\r\n\r\n\r\n
    public class ManageRegistration
    {
    public void AddReg(RegistrationModel regModel)
    {
    using (var DB = new MYDBEntities())
    {
    Registration Reg = new Registration()
    {
    FullName = regModel.FullName, <\/code>
    Address = regModel.Address, <\/code>
    Gender = regModel.Gender, <\/code>
    City = regModel.City, <\/code>
    DoB = regModel.DoB, <\/code>
    Cno = regModel.Cno <\/code>
    }; <\/code>
    DB.Registrations.Add(Reg); <\/code>
    DB.SaveChanges(); <\/code>
    } <\/code>
    } <\/code>
    }<\/code><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n

    Then add EntityFramework.dll and EntityFramework.SqlServer.dll references in \u201cWebApp\u201d.<\/p>\r\n\r\n\r\n\r\n

    So now the business layer and data layer has been completely created.<\/p>\r\n\r\n\r\n\r\n

    Now, in WebApp (i. e. in presentation layer), add a new controller with name \u201cHome controller\u201d and replace with below snippet.<\/p>\r\n\r\n\r\n\r\n

    \r\n\r\n\r\n\r\n
    public class HomeController : Controller
    {
    \/\/ GET: Home
    public ActionResult Index()
    {
    return View();
    }
    ManageRegistration ManageReg = new ManageRegistration();
    [HttpPost]
    public void AddReg(FormCollection Form)
    {
    RegistrationModel registrationModel = new RegistrationModel()
    {
    FullName = Form[\"txtName\"], <\/code>
    Address = Form[\"txtAddress\"], <\/code>
    Gender = Form[\"rdbGender\"], <\/code>
    City = Form[\"txtCity\"], <\/code>
    DoB = Convert.ToDateTime(Form[\"txtDoB\"]), <\/code>
    Cno = Form[\"txtCno\"] <\/code>
    }; <\/code>
    ManageReg.AddReg(registrationModel); <\/code>
    Response.Write(\"Saved\"); <\/code>
    } <\/code>
    }<\/code><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n

    Add index view with empty without model and put the below html and ajax snippet in it<\/p>\r\n\r\n\r\n\r\n

    \r\n
    \"\"<\/figure>\r\n<\/figure>\r\n\r\n\r\n\r\n
    \r\n
    \"\"<\/figure>\r\n<\/figure>\r\n\r\n\r\n\r\n

    Run the program<\/p>\r\n","protected":false},"excerpt":{"rendered":"

    Three Tier (Three Layer) Architecture With a three-layer design, the project is divided into three layers: the user interface layer, the business layer, and the data layer (database), where we divide the UI, logic, and data into three groups. If a user wants to switch the user interface from a Windows computer to a smartphone, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[277,2,3,281,4,6,279,234,1],"tags":[14,20],"class_list":["post-752","post","type-post","status-publish","format-standard","hentry","category-asp-net-core","category-dot-net-training","category-dot-net-training-in-chennai","category-dot-net-training-in-india","category-information-on-dotnet","category-mvc-training-tutorials","category-oop-concept","category-sql-server","category-uncategorized","tag-net-training-in-chennai","tag-asp-net-training-in-chennai"],"yoast_head":"\nThree Tier Architecture in MVC | Maria Academy<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.softwaretraininginchennai.com\/blog\/three-tier-three-layer-architecture\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Three Tier Architecture in MVC | Maria Academy\" \/>\n<meta property=\"og:description\" content=\"Three Tier (Three Layer) Architecture With a three-layer design, the project is divided into three layers: the user interface layer, the business layer, and the data layer (database), where we divide the UI, logic, and data into three groups. 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