How to perform Repository pattern in ASP.NET MVC?

Step 5: Call Repository from Controller.

Add new controller

1. Add->new Item->Controller->MVC5-Controller Empty

Controller Interact with StudentRepository by creating Reference of IStudentRepository

StudentController.cs

usingDemo.Models;
usingSystem.Linq;
usingSystem.Web.Mvc;

namespaceDemo.Controllers
{
	publicclassStudentController : Controller
		{
	// GET: Student
		privateIStudentRepositoryinterfaceobj;

		publicStudentController()
		{
			this.interfaceobj = newStudentRepository(new demoEntities2());
		}

		// GET: Student
		publicActionResultIndex()
		{
			var data = from m ininterfaceobj.GetStudents() select m;


			return View(data);
		}
		publicActionResultDetailStudent(int id)
		{
			student s = interfaceobj.GetStudentById(id);
			return View(s);
		}
		publicActionResultCreateStudent()
		{
			returnView();
		}
		[HttpPost]
		publicActionResultCreateStudent(student s)
		{
			interfaceobj.InsertStudent(s);
			interfaceobj.save();
			returnRedirectToAction("Index");
		}
		publicActionResultUpdateStudent(int id)
		{
			student s = interfaceobj.GetStudentById(id);
			return View(s);
		}
		[HttpPost]
		publicActionResultUpdateStudent(int id, student s)
		{
			interfaceobj.UpdateStudent(s);
			interfaceobj.save();
			returnRedirectToAction("Index");
		}
		publicActionResultDeleteStudent(int id)
		{
			student s = interfaceobj.GetStudentById(id);
			return View(s);
		}
		[HttpPost]
		publicActionResultDeleteStudent(int id, student s)
		{
			interfaceobj.DeleteStudent(id);
			interfaceobj.save();
			returnRedirectToAction("Index");
		}


    }
}

Step 6: Add View

Add View for Index, CreateStudent, DetailStudent, DeleteStudent

Index.cs

@model IEnumerable

@{
    ViewBag.Title = "Index";
}
Index

    @Html.ActionLink("Create New", "CreateStudent")


@foreach (var item in Model) {
    
}

            @Html.DisplayNameFor(model => model.s_id)

            @Html.DisplayNameFor(model => model.s_name)

            @Html.DisplayNameFor(model => model.s_lastname)

            @Html.DisplayNameFor(model => model.s_bday)

            @Html.DisplayFor(modelItem => item.s_id)

            @Html.DisplayFor(modelItem => item.s_name)

            @Html.DisplayFor(modelItem => item.s_lastname)

            @Html.DisplayFor(modelItem => item.s_bday)

            @Html.ActionLink("Edit", "UpdateStudent", new {  id=item.s_id  }) |
            @Html.ActionLink("Details", "DetailStudent", new {  id=item.s_id  }) |
            @Html.ActionLink("Delete", "DeleteStudent", new {  id=item.s_id })

CreateStudent.cs

@model Demo.Models.student

@{
ViewBag.Title = "CreateStudent";
}

<h2>CreateStudent</h2>

@using (Html.BeginForm()) 
{
@Html.AntiForgeryToken()

<divclass="form-horizontal">
<h4>student</h4>
<hr/>
<divclass="form-group">
@Html.LabelFor(model =>model.s_name, htmlAttributes: new { @class = "control-label col-md-2" })
<divclass="col-md-10">
@Html.EditorFor(model =>model.s_name, new { htmlAttributes = new { @class = "form-control" } })
</div>
</div>

<divclass="form-group">
@Html.LabelFor(model =>model.s_lastname, htmlAttributes: new { @class = "control-label col-md-2" })
<divclass="col-md-10">
@Html.EditorFor(model =>model.s_lastname, new { htmlAttributes = new { @class = "form-control" } })
</div>
</div>

<divclass="form-group">
@Html.LabelFor(model =>model.s_bday, htmlAttributes: new { @class = "control-label col-md-2" })
<divclass="col-md-10">
@Html.EditorFor(model =>model.s_bday, new { htmlAttributes = new { @class = "form-control" } })
</div>
</div>

<divclass="form-group">
<divclass="col-md-offset-2 col-md-10">
<inputtype="submit"value="Create"class="btnbtn-default"/>
</div>
</div>
</div>
}

<div>
@Html.ActionLink("Back to List", "Index")
</div>

@section Scripts {
@Scripts.Render("~/bundles/jqueryval")
}

Note: Asp.net MVC provide Template [List, add, edit, delete] for View. For adding View Right Click on the method and Add View. Select Template and add Model class.

In RouteConfig.cs file change the name of controller [Home->Student]

Step 7: Build and Run Project

Build and Run the application.

Conclusion:

A repository pattern is a popular pattern for creating a web application. Repository pattern isolates Data-access Layer and Business Logic layer. So, users can easily manage Business logic without worrying about the database. By implementing repository users can unit testtheir application.