ការសិក្សាពីរបៀបបង្កើត CRUD ក្នុង ASP.NET MVC 5

sysomeho

6 years ago

មាតិកា

សេចក្តីផ្តើម
គោលបំណង
តម្រូវការ
ជំហានទី១៖ បង្កើត Project
ជំហានទី២៖ បង្កើត Database និង Table
ជំហានទី៣៖ បង្កើត Class Model
ជំហានទី៤៖ បង្កើត Controller
ជំហានទី៥៖ បង្កើត Repository folder និង Repository Class
ជំហានទី៦៖ បង្កើត Method នៅក្នុង EmployeeController.cs file
ជំហានទី៧៖ បង្កើត View
ជំហានទី៨៖ ធ្វើការ Configure ActionLink ទៅលើ Edit និង delete records
ជំហានទី៩៖ Configure RouteConfig.cs ដើម្បី set default action
ជំហានទី១០៖ Run Application

1. សេចក្តីផ្តើម

នៅក្នុង Tutorial នេះ យើងនឹងសិក្សាពីរបៀបង្កើត create, read, update, និង delete ជាមួយ ASP.NET MVC5។ ខាងក្រោមនេះនឹងបង្ហាញពីជំហាននីមួយៗក្នុងការ implementation កូដ។

2. គោលបំណង

ក្រោយពីអនុវត្តន៍តាម Tutorial នេះ លោកអ្នកនឹងយល់អំពី

យល់ដឹងពីរបៀបបង្កើតNET MVC Project
យល់ដឹងការបង្កើត Model Controller និង View
យល់ដឹងពីរបៀបបង្កើត Project

3. តម្រូវការ

ដើម្បីអាចសិក្សា បានយើងត្រូវមាន

Microsoft Visual Studio (any version)
Microsoft SQL Server (any version)

4. ជំហានទី១៖ បង្កើត Project

សូមចូលទៅបើកកម្មវិធី Microsoft visual studio

ចុច “Start”
បន្ទាប់ “All Programs”
ជ្រើសរើសយក “Microsoft Visual Studio 2015”.
ដាក់ឈ្មោះអោយ Project
ចុច OK
រើសយក MVC
ចុច OK
ក្រោយមកយើងនឹងទទួលបាន Project structure ដូចរូបខាងក្រោម៖

5. ជំហានទី២៖ បង្កើត Database និង Table

សូមចូលទៅបើកកម្មវិធី Microsoft SQL Server 2014

right click លើ Database
New Database…
ក្រោយពីបង្កើត Database រួច សូមធ្វើការបង្កើត Table
Right click លើ Table
New
Table…
សូមបង្កើត Column ដូចរូប

ចូរបង្កើត Store Procedure ដូចខាងក្រោម

Store Procedure សម្រាប់ Insert Records

Create procedure [dbo].[AddNewEmpDetails]
(
@Name varchar (50),
@City varchar (50),
@Address varchar (50)
)
as
begin
Insert into Employee values(@Name,@City,@Address)
End

Store Procedure សម្រាប់ View Records

Create Procedure [dbo].[GetEmployees]  
as  
begin  
   select *from Employee  
End

Store Procedure សម្រាប់ Update Records

Create procedure [dbo].[UpdateEmpDetails]  
(  
   @EmpId int,  
   @Name varchar (50),  
   @City varchar (50),  
   @Address varchar (50)  
)  
as  
begin  
   Update Employee   
   set Name=@Name,  
   City=@City,  
   Address=@Address  
   where Id=@EmpId  
End

Store Procedure សម្រាប់ Delete Records

Create procedure [dbo].[DeleteEmpById]  
(  
   @EmpId int  
)  
as   
begin  
   Delete from Employee where Id=@EmpId  
End

6. ជំហានទី៣៖ បង្កើត Class Model

ដើម្បីបង្កើត Model Class បាន ត្រូវ

- Right click លើ Folder “Models”
- Add
- Class…
- វានឹងលោតផ្ទាំងមួយទៀត

ដាក់ឈ្មោះអោយ Model class
Click “Add”

យើងនឹងទទួលបាន class model ខាងក្រោម

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace ASPMVCEmployee.Models
{
    public class EmpModel
    {
    }
}

បន្ទាប់មកសូមធ្វើការបង្កើតនូវ Class Properties ព្រមទាំង dataAnnotations របស់វា

using System.Linq;
using System.Web;

namespace ASPMVCEmployee.Models
{
    public class EmpModel
    {
        [Display(Name="Id")]
        public int Empid { get; set; }
        [Required (ErrorMessage ="First name is required.")]
        public string Name { get; set; }
        [Required(ErrorMessage = "City is required.")]
        public string City { get; set; }
        [Required(ErrorMessage = "Address is required.")]
        public string Address { get; set; }
    }
}

7. ជំហានទី៤៖ បង្កើត Controller

ដើម្បីបង្កើត Controller Class បាន ត្រូវ

Right click លើ Folder “Controller”
Add
Controller…
វានឹង popup ផ្ទាំងមួយទៀតមក

សូមយក MVC 5 Controller with read/write actions
ចុច Add
ដាក់ឈ្មោះអោយ Controller

យើងនឹងទទួលបាន class controller ជាមួយ action របស់វាដូចខាងក្រោម

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace ASPMVCEmployee.Controllers
{
    public class EmployeeController : Controller
    {
        // GET: Employee
        public ActionResult Index()
        {
            return View();
        }
        // GET: Employee/Details/5
        public ActionResult Details(int id)
        {
            return View();
        }
        // GET: Employee/Create
        public ActionResult Create()
        {
            return View();
        }
        // POST: Employee/Create
        [HttpPost]
        public ActionResult Create(FormCollection collection)
        {
            try
            {
                // TODO: Add insert logic here
                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }
        // GET: Employee/Edit/5
        public ActionResult Edit(int id)
        {
            return View();
        }
        // POST: Employee/Edit/5
        [HttpPost]
        public ActionResult Edit(int id, FormCollection collection)
        {
            try
            {
                // TODO: Add update logic here
                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }
        // GET: Employee/Delete/5
        public ActionResult Delete(int id)
        {
            return View();
        }
        // POST: Employee/Delete/5
        [HttpPost]
        public ActionResult Delete(int id, FormCollection collection)
        {
            try
            {
                // TODO: Add delete logic here
                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }
    }
}

8. ជំហានទី៥៖ បង្កើត Repository folder និង Repository Class

យើងបង្កើត Folder repository និង repository ក្នុងគោលបំណងផ្ទុកនូវ database operations ដូចជា method crud ជាដើម។

- Right click លើ project
- Add
- New Folder
- សូមបង្កើត class repository
- យើងនឹងទទួលបានដូចរូប

សូមធ្វើការសេរសេរកូដនៅក្នុង class “EmpRepository.cs”

using ASPMVCEmployee.Models;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;

namespace ASPMVCEmployee.Repository
{
    public class EmpRepository
    {
        private SqlConnection con;
        //To Handle connection related activities    
        private void connection()
        {
            string constr = ConfigurationManager.ConnectionStrings["getconn"].ToString();
            con = new SqlConnection(constr);
        }
        //To Add Employee details    
        public bool AddEmployee(EmpModel obj)
        {
            connection();
            SqlCommand com = new SqlCommand("AddNewEmpDetails", con);
            com.CommandType = CommandType.StoredProcedure;
            com.Parameters.AddWithValue("@Name", obj.Name);
            com.Parameters.AddWithValue("@City", obj.City);
            com.Parameters.AddWithValue("@Address", obj.Address);
            con.Open();
            int i = com.ExecuteNonQuery();
            con.Close();
            if (i >= 1)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        //To view employee details with generic list     
        public List<EmpModel> GetAllEmployees()
        {
            connection();
            List<EmpModel> EmpList = new List<EmpModel>();
            SqlCommand com = new SqlCommand("GetEmployees", con);
            com.CommandType = CommandType.StoredProcedure;
            SqlDataAdapter da = new SqlDataAdapter(com);
            DataTable dt = new DataTable();
            con.Open();
            da.Fill(dt);
            con.Close();
            //Bind EmpModel generic list using dataRow     
            foreach (DataRow dr in dt.Rows)
            {
                EmpList.Add(
                    new EmpModel
                    {
                        Empid = Convert.ToInt32(dr["Id"]),
                        Name = Convert.ToString(dr["Name"]),
                        City = Convert.ToString(dr["City"]),
                        Address = Convert.ToString(dr["Address"])
                    }
                 );
            }
            return EmpList;
        }
//To Update Employee details    
        public bool UpdateEmployee(EmpModel obj)
        {
            connection();
            SqlCommand com = new SqlCommand("UpdateEmpDetails", con);
            com.CommandType = CommandType.StoredProcedure;
            com.Parameters.AddWithValue("@EmpId", obj.Empid);
            com.Parameters.AddWithValue("@Name", obj.Name);
            com.Parameters.AddWithValue("@City", obj.City);
            com.Parameters.AddWithValue("@Address", obj.Address);
            con.Open();
            int i = com.ExecuteNonQuery();
            con.Close();
            if (i >= 1)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        //To delete Employee details    
        public bool DeleteEmployee(int Id)
        {
            connection();
            SqlCommand com = new SqlCommand("DeleteEmpById", con);
            com.CommandType = CommandType.StoredProcedure;
            com.Parameters.AddWithValue("@EmpId", Id);
            con.Open();
            int i = com.ExecuteNonQuery();
            con.Close();
            if (i >= 1)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
    }
}

ចំណាំ៖

string constr = ConfigurationManager.ConnectionStrings[“getconn”].ToString();

សូមដាក់ឈ្មោះ Connection អោយដូចនៅក្នុង Web.config

9. ជំហានទី៦៖ បង្កើត Method នៅក្នុង EmployeeController.cs file

បើក file “EmployeeController.cs”

សរសេរកូដចូល

using ASPMVCEmployee.Models;
using ASPMVCEmployee.Repository;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace ASPMVCEmployee.Controllers
{
    public class EmployeeController : Controller
    {
        // GET: Employee/GetAllEmpDetails    
        public ActionResult GetAllEmpDetails()
        {
            EmpRepository EmpRepo = new EmpRepository();
            ModelState.Clear();
            return View(EmpRepo.GetAllEmployees());
        }
        // GET: Employee/AddEmployee    
        public ActionResult AddEmployee()
        {
            return View();
        }
        // POST: Employee/AddEmployee    
        [HttpPost]
        public ActionResult AddEmployee(EmpModel Emp)
        {
            try
            {
                if (ModelState.IsValid)
                {
                    EmpRepository EmpRepo = new EmpRepository();

                    if (EmpRepo.AddEmployee(Emp))
                    {
                        ViewBag.Message = "Employee details added successfully";
                    }
                }
                return View();
            }
            catch
            {
                return View();
            }
        }
        // GET: Employee/EditEmpDetails/5    
        public ActionResult EditEmpDetails(int id)
        {
            EmpRepository EmpRepo = new EmpRepository();
            return View(EmpRepo.GetAllEmployees().Find(Emp => Emp.Empid == id));
        }
        // POST: Employee/EditEmpDetails/5    
        [HttpPost]
        public ActionResult EditEmpDetails(int id, EmpModel obj)
        {
            try
            {
                EmpRepository EmpRepo = new EmpRepository();
                EmpRepo.UpdateEmployee(obj);
                return RedirectToAction("GetAllEmpDetails");
            }
            catch
            {
                return View();
            }
        }
// GET: Employee/DeleteEmp/5    
        public ActionResult DeleteEmp(int id)
        {
            try
            {
                EmpRepository EmpRepo = new EmpRepository();
                if (EmpRepo.DeleteEmployee(id))
                {
                    ViewBag.AlertMsg = "Employee details deleted successfully";

                }
                return RedirectToAction("GetAllEmpDetails");

            }
            catch
            {
                return View();
            }
        }
    }
}

10. ជំហានទី៧៖ បង្កើត View

បង្កើត Partial view ដើម្បី Add the employees

សូមធ្វើការ right click ទៅលើ ActionResult Method
បន្ទាប់មក click “Add View”
វានឹង popup ផ្ទាំងមួយមក

- សូមធ្វើការរើសយក ដូចរូប
- បន្ទាប់ពីចុច Add រួច នោះវានឹងធ្វើការ Generate code ដូចខាងក្រោម
```
@model ASPMVCEmployee.Models.EmpModel
@using (Html.BeginForm()) 
{
    @Html.AntiForgeryToken()
```
  EmpModel
  
  @Html.ValidationSummary(true, “”, new { @class = “text-danger” })
  
  @Html.LabelFor(model => model.Empid, htmlAttributes: new { @class = “control-label col-md-2” })
  
  @Html.EditorFor(model => model.Empid, new { htmlAttributes = new { @class = “form-control” } }) @Html.ValidationMessageFor(model => model.Empid, “”, new { @class = “text-danger” })
  
  </div>
  
  @Html.LabelFor(model => model.Name, htmlAttributes: new { @class = “control-label col-md-2” })
  
  @Html.EditorFor(model => model.Name, new { htmlAttributes = new { @class = “form-control” } }) @Html.ValidationMessageFor(model => model.Name, “”, new { @class = “text-danger” })
  
  </div>
  
  @Html.LabelFor(model => model.City, htmlAttributes: new { @class = “control-label col-md-2” })
  
  @Html.EditorFor(model => model.City, new { htmlAttributes = new { @class = “form-control” } }) @Html.ValidationMessageFor(model => model.City, “”, new { @class = “text-danger” })
  
  </div>
  
  @Html.LabelFor(model => model.Address, htmlAttributes: new { @class = “control-label col-md-2” })
  
  @Html.EditorFor(model => model.Address, new { htmlAttributes = new { @class = “form-control” } }) @Html.ValidationMessageFor(model => model.Address, “”, new { @class = “text-danger” })
  
  </div>
  
  </div> </div> }
  
  @Html.ActionLink(“Back to List”, “GetAllEmpDetails”)
  
  @section Scripts { @Scripts.Render(“~/bundles/jqueryval”) }
- បង្កើត Partial view ដើម្បី View employees
- បន្ទាប់ពីចុច Add រួច នោះវានឹងធ្វើការ Generate code ដូចខាងក្រោម

@model IEnumerable<ASPMVCEmployee.Models.EmpModel>

<p>
    @Html.ActionLink("Create New", "Create")
</p>
<table class="table">
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.Empid)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Name)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.City)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Address)
        </th>
        <th></th>
    </tr>

@foreach (var item in Model) {
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.Empid)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Name)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.City)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Address)
        </td>
        <td>
            @Html.ActionLink("Edit", "EditEmpDetails", new { id=item.Empid  }) |
            @Html.ActionLink("Details", "Details", new { id = item.Empid }) |
            @Html.ActionLink("Delete", "DeleteEmp", new { id = item.Empid })        
</td>
    </tr>
}

</table>

បង្កើត Partial view ដើម្បី Update employees
បន្ទាប់ពីចុច Add រួច នោះវានឹងធ្វើការ Generate code ដូចខាងក្រោម
```
@model ASPMVCEmployee.Models.EmpModel

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

@Html.ValidationSummary(true, “”, new { @class = “text-danger” })

@Html.LabelFor(model => model.Empid, htmlAttributes: new { @class = “control-label col-md-2” })

@Html.EditorFor(model => model.Empid, new { htmlAttributes = new { @class = “form-control” } }) @Html.ValidationMessageFor(model => model.Empid, “”, new { @class = “text-danger” })

</div>

@Html.LabelFor(model => model.Name, htmlAttributes: new { @class = “control-label col-md-2” })

@Html.EditorFor(model => model.Name, new { htmlAttributes = new { @class = “form-control” } }) @Html.ValidationMessageFor(model => model.Name, “”, new { @class = “text-danger” })

</div>

@Html.LabelFor(model => model.City, htmlAttributes: new { @class = “control-label col-md-2” })

@Html.EditorFor(model => model.City, new { htmlAttributes = new { @class = “form-control” } }) @Html.ValidationMessageFor(model => model.City, “”, new { @class = “text-danger” })

</div>

@Html.LabelFor(model => model.Address, htmlAttributes: new { @class = “control-label col-md-2” })

@Html.EditorFor(model => model.Address, new { htmlAttributes = new { @class = “form-control” } }) @Html.ValidationMessageFor(model => model.Address, “”, new { @class = “text-danger” })

</div>

</div> </div> }

@Html.ActionLink(“Back to List”, “GetAllEmpDetails”)

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

11. ជំហានទី៨៖ ធ្វើការ Configure ActionLink ទៅលើ Edit និង delete records

នៅក្នុង file “GetAllEmpDetails.cshtml” សូមធ្វើការ edit link

12. ជំហានទី៩៖ Configure RouteConfig.cs ដើម្បី set default action

ក្នុង Folder “App_Start”

RouteConfig.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;

namespace ASPMVCEmployee
{
    public class RouteConfig
    {
        public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            routes.MapRoute(
                name: "Default",
                url: "{controller}/{action}/{id}",
                defaults: new { controller = "Employee", action = "AddEmployee", id = UrlParameter.Optional }
            );
        }
    }
}