How To Create Insert Update Delete in Gridview in MVC4.

Introduction:-

                    in this Example we simply Explain that How to perform CRUD Operation in Gridview using MVC4.

What is CRUD Operation:-

               

                                CRUD Operation means that Create,Read,Update,Delete operation in Database that is the short form are very speaked in IT Field.

In this Example we Simply Create a three Function for Edit Inset and Delete operation. In which we simply Define the Controller Class Code means Logic part the Designing part we cannot cover in this Example.

This is the same Facility as we Define in simple Gridview with Asp.net C#, but Here in MVC we can Have to Create Four Design Form like Create,Insert,Update and last is Delete.

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Code:-

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

using System.Web.Mvc.Ajax;

using demo.Models;

using System.Web.UI;

using System.Web.UI.WebControls;

namespace demo.Controllers

{

    public class QuestionController : Controller

    {

        //

        // GET: /Question/

        public ActionResult Index()

        {

            QuestionModelDataContext qDB = new QuestionModelDataContext();

            var a = (from t in qDB.polls select t).ToList();

            return View(a);

        }

        //

        //Delete data from table

        public ActionResult Delete(int id)

        {

            try

            {

                Response.Write("<script type='JavaScript'> var c= confirm('r u sure'); </script>");

                QuestionModelDataContext q1 = new QuestionModelDataContext();

                var a = q1.polls.Where(p => p.Id == id).SingleOrDefault();

                q1.polls.DeleteOnSubmit(a);

                q1.SubmitChanges();

                return RedirectToAction("Index");

            }

            catch

            {

                return View();

            }

        }

        //

        // GET: /Question/Details/5

        public ActionResult Details(int id)

        {

            QuestionModelDataContext q1 = new QuestionModelDataContext();

            var a = (from t in q1.polls where t.Id == id select t).ToList();

            return View(a);

        }

        //

        // GET: /Question/Create

        public ActionResult Create()

        {

            return View();

        }

        //

        // POST: /Question/Create

        [AcceptVerbs(HttpVerbs.Post)]

        public ActionResult Create(FormCollection collection)

        {

            try

            {

                QuestionModelDataContext q1 = new QuestionModelDataContext();

                poll p = new poll();

                p.Name = collection.GetValue("Name").AttemptedValue;

                p.Question = collection.GetValue("Question").AttemptedValue;

                q1.polls.InsertOnSubmit(p);

                q1.SubmitChanges();

                return RedirectToAction("Index");

            }

            catch

            {

                return View();

            }

        }

        //

        // GET: /Question/Edit/5

        public ActionResult Edit(int id)

        {

            QuestionModelDataContext q1 = new QuestionModelDataContext();

            var a = (from t in q1.polls where t.Id == id select t).ToList();

            //FormCollection collection=new FormCollection();

            //collection.Set("Id", a[0].Id.ToString());

            //collection.Set("Name", a[0].Name.ToString());

            //collection.Set("Question", a[0].Question.ToString());

            return View(a[0]);

        }

        //

        // POST: /Question/Edit/5

        [AcceptVerbs(HttpVerbs.Post)]

        public ActionResult Edit(int id, FormCollection collection)

        {

            try

            {

                // TODO: Add update logic here

                QuestionModelDataContext q1 = new QuestionModelDataContext();

                var m = q1.polls.First(p => p.Id == id);

                m.Id = Convert.ToInt32(collection.GetValue("Id").AttemptedValue);

                m.Name = collection.GetValue("Name").AttemptedValue;

                m.Question = collection.GetValue("Question").AttemptedValue;

                q1.SubmitChanges();

                return RedirectToAction("Index");

            }

            catch

            {

                return View();

            }

        }

    }

}