crud operations using entity framework in asp.net mvc code example
Example 1: crud operation without entity framework in mvc
using System.Web.Mvc;using CRUDinMVC.Models; namespace CRUDinMVC.Controllers{ public class StudentController : Controller { // 1. *************RETRIEVE ALL STUDENT DETAILS ****************** // GET: Student public ActionResult Index() { StudentDBHandle dbhandle = new StudentDBHandle(); ModelState.Clear(); return View(dbhandle.GetStudent()); } // 2. *************ADD NEW STUDENT ****************** // GET: Student/Create public ActionResult Create() { return View(); } // POST: Student/Create [HttpPost] public ActionResult Create(StudentModel smodel) { try { if (ModelState.IsValid) { StudentDBHandle sdb = new StudentDBHandle(); if (sdb.AddStudent(smodel)) { ViewBag.Message = "Student Details Added Successfully"; ModelState.Clear(); } } return View(); } catch { return View(); } } // 3. ************* EDIT STUDENT DETAILS ****************** // GET: Student/Edit/5 public ActionResult Edit(int id) { StudentDBHandle sdb = new StudentDBHandle(); return View(sdb.GetStudent().Find(smodel => smodel.Id == id)); } // POST: Student/Edit/5 [HttpPost] public ActionResult Edit(int id, StudentModel smodel) { try { StudentDBHandle sdb = new StudentDBHandle(); sdb.UpdateDetails(smodel); return RedirectToAction("Index"); } catch { return View(); } } // 4. ************* DELETE STUDENT DETAILS ****************** // GET: Student/Delete/5 public ActionResult Delete(int id) { try { StudentDBHandle sdb = new StudentDBHandle(); if (sdb.DeleteStudent(id)) { ViewBag.AlertMsg = "Student Deleted Successfully"; } return RedirectToAction("Index"); } catch { return View(); } } }}
Example 2: crud operation without entity framework in mvc
Create procedure [dbo].[AddNewStudent] ( @Name nvarchar (50), @City nvarchar (50), @Address nvarchar (100) ) as begin Insert into StudentReg values(@Name,@City,@Address) End
Example 3: crud operation without entity framework in mvc
using System;using System.Collections.Generic;using System.Data;using System.Data.SqlClient;using System.Configuration; namespace CRUDinMVC.Models{ public class StudentDBHandle { private SqlConnection con; private void connection() { string constring = ConfigurationManager.ConnectionStrings["studentconn"].ToString(); con = new SqlConnection(constring); } // **************** ADD NEW STUDENT ********************* public bool AddStudent(StudentModel smodel) { connection(); SqlCommand cmd = new SqlCommand("AddNewStudent", con); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.AddWithValue("@Name", smodel.Name); cmd.Parameters.AddWithValue("@City", smodel.City); cmd.Parameters.AddWithValue("@Address", smodel.Address); con.Open(); int i = cmd.ExecuteNonQuery(); con.Close(); if (i >= 1) return true; else return false; } // ********** VIEW STUDENT DETAILS ******************** public List<StudentModel> GetStudent() { connection(); List<StudentModel> studentlist = new List<StudentModel>(); SqlCommand cmd = new SqlCommand("GetStudentDetails", con); cmd.CommandType = CommandType.StoredProcedure; SqlDataAdapter sd = new SqlDataAdapter(cmd); DataTable dt = new DataTable(); con.Open(); sd.Fill(dt); con.Close(); foreach(DataRow dr in dt.Rows) { studentlist.Add( new StudentModel { Id = Convert.ToInt32(dr["Id"]), Name = Convert.ToString(dr["Name"]), City = Convert.ToString(dr["City"]), Address = Convert.ToString(dr["Address"]) }); } return studentlist; } // ***************** UPDATE STUDENT DETAILS ********************* public bool UpdateDetails(StudentModel smodel) { connection(); SqlCommand cmd = new SqlCommand("UpdateStudentDetails", con); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.AddWithValue("@StdId", smodel.Id); cmd.Parameters.AddWithValue("@Name", smodel.Name); cmd.Parameters.AddWithValue("@City", smodel.City); cmd.Parameters.AddWithValue("@Address", smodel.Address); con.Open(); int i = cmd.ExecuteNonQuery(); con.Close(); if (i >= 1) return true; else return false; } // ********************** DELETE STUDENT DETAILS ******************* public bool DeleteStudent(int id) { connection(); SqlCommand cmd = new SqlCommand("DeleteStudent", con); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.AddWithValue("@StdId", id); con.Open(); int i = cmd.ExecuteNonQuery(); con.Close(); if (i >= 1) return true; else return false; } }}
Example 4: crud operation without entity framework in mvc
Create procedure [dbo].[DeleteStudent] ( @StdId int ) as begin Delete from StudentReg where Id=@StdId End