I checked google but found nothing good. I am searching for usinf Traditional SQL queries in MVC instead of Entity framework etc. So it would be good if you guys provide me some examples.
I started to learn MVC but lot of examples uses linq to SQL and EF etc which I don't want to use at all, I want to use simple old SQL queries in Model layer.
Simplest example:
//Domain Class
using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
namespace BanjoOnMyKnee.Models
{
public class DomainModel
{
public string connectionString = ".\\SQLEXPRESS; Initial-Catalog=YourDBName; Integrated-Security=true";
public void CreateSomething(ViewModel model)
{
using(SqlConnection connection = new SqlConnection(connectionString))
using (SqlCommand command = new SqlCommand("",connection))
{
command.CommandText = "insert into Names values(@Name)";
command.Parameters.AddWithValue("@Name", model.Name);
command.ExecuteNonQuery();
}
}
public ViewModel FindSomething(int id)
{
var model = new ViewModel();
using (SqlConnection connection = new SqlConnection(connectionString))
using (SqlCommand command = new SqlCommand("", connection))
{
command.CommandText = "select * from Names where Id=@Id";
command.Parameters.AddWithValue("@Id",id);
SqlDataReader reader = command.ExecuteReader();
model.Id = id;
model.Name = reader["Name"].ToString();
}
return model;
}
public void DeleteSomething(ViewModel model)
{
using (SqlConnection connection = new SqlConnection(connectionString))
using (SqlCommand command = new SqlCommand("", connection))
{
command.CommandText = "delete from Names where Id=@Id";
command.Parameters.AddWithValue("@Id", model.Id);
command.ExecuteNonQuery();
}
}
public void EditSomething(ViewModel model)
{
using (SqlConnection connection = new SqlConnection(connectionString))
using (SqlCommand command = new SqlCommand("", connection))
{
command.CommandText = "Update Names set Name=@Name where Id=@Id";
command.Parameters.AddWithValue("@Name", model.Name);
command.Parameters.AddWithValue("@Id", model.Id);
command.ExecuteNonQuery();
}
}
}
}
And here's my controller class
//My Controller class
public class HomeController : Controller
{
//
// GET: /Home/
public ActionResult Index()
{
return View();
}
//
// GET: /Home/Create
public ActionResult Create()
{
return View(new ViewModel());
}
//
// POST: /Home/Create
[HttpPost]
public ActionResult Create(ViewModel vm)
{
try
{
var domainModel = new DomainModel();
domainModel.CreateSomething(vm);
return RedirectToAction("Index");
}
catch
{
return View(new ViewModel());
}
}
//
// GET: /Home/Edit/5
public ActionResult Edit(int id)
{
ViewModel model = new DomainModel().FindSomething(id);
return View(model);
}
[HttpPost]
public ActionResult Edit(ViewModel editModel)
{
try
{
var dm = new DomainModel();
dm.EditSomething(editModel);
return RedirectToAction("Index");
}
catch
{
return View(new ViewModel());
}
}
}
My ViewModel class
//My ViewModel
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace BanjoOnMyKnee.Models
{
public class ViewModel
{
public int Id { get; set; }
public string Name { get; set; }
}
}
And my 'Create' View
//My view
@model BanjoOnMyKnee.Models.ViewModel
@{
ViewBag.Title = "Create";
}
<h2>Create</h2>
@using(Html.BeginForm()){
@Html.HiddenFor(m => m.Id);
<p> Name :
Html.EditorFor(m=>m.Name);</p>
<input type="submit" value="Create" />
}
So just add a Helper class and write whatever you need (Sql connections,commands,queries...), then call these helper methods from your controller.It's not different than old style
Static Helper Class:
public static class HelperFunctions
{
private static string connString = "your connection string";
public static IEnumerable<User> GetAllUsers()
{
using (var conn = new SqlConnection(connString))
using (var cmd = new SqlCommand(connection:conn))
{
// set your command text, execute your command
// get results and return
}
}
In your Controller:
public ActionResult Users()
{
// Get user list
IEnumerable<User> users = HelperFunctions.GetAllUsers();
// Return your view and pass it to your list
return View(users);
}
In your View set your View model:
@model IEnumerable<User>
Then you can access your user list from your View, for example:
foreach(var user in Model)
{
<p> @user.Name </p>
}
Model represents your actual View Model.If you want access more than one list from your View, you can use ViewBag or ViewData. Check this article for more information: http://www.codeproject.com/Articles/476967/WhatplusisplusViewData-2cplusViewBagplusandplusTem
how about writing stored procedures and just invoke them as methods using by just adding a LinQ to Sql Class into your project this will make it much easier for dealing with database
after making the needed stored procedures :
- right click in your project then add new item then choose a LinQ to SQL Class and name it
- drag and drop your previously made stored procedures
- make an instance of your
linq to sql class
then you can invoke your stored procedures and members of this class
http://msdn.microsoft.com/en-us/library/bb386946(v=vs.110).aspx
this link may help you as well
Using entity framework it can be done
Entitiesdb db = new Entitiesdb();
string query="delete from tableA where id=@id"
db.Database.ExecuteSqlCommand(query, @id);
