Master Detail CRUD Operations Using ASP.Net MVC 3 And Entity Framework

Hasibul Haque
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Introduction

In this article I discuss how we can perform Master-Detail CRUD operation using Entity Framework (Code First) and ASP.Net MVC 3. Here I have used JSON (json2.js) for data passing, Ajax for posting and DataTables (datatables.js) for manipulating detail records.

Fig 1: Creating New Sales Record with multiple sales Sub Record

Creating Master Detail CRUD Application: Create Sample Solution

Open VS 2010
Create ASP.Net MVC 3 Project named "MasterDetail"

Here I have used

JSON for passing data view to controller.

Data Tables for manipulating details record.

Let us add JSON and DataTables js file to our project in the following way.

Select Add Library Package Reference by right-clicking Reference.
The Add Library Package Manager Window will appear; from the window search json2 & DataTables and install them.
After installing them, you will find json2.js and datatables.js in the script folder.

Now our solution is ready for further work.

Creating Model

Here we have considered we have two entities SalesMain and SalesSub (a one to many relation). One salesMain has multiple sales sub records.

public class SalesMain
    {

        [Key]
        public int SalesId { get; set; }
        public string ReferenceNo { get; set; }
        public DateTime SalesDate { get; set; }
        public string SalesPerson { get; set; }

        public virtual ICollection<SalesSub> SalesSubs { get; set; }
    }

public class SalesSub
    {

        [Key, Column(Order = 0)]
        public int SalesId { get; set; }

        [Key, Column(Order = 1)]
        public string ItemName { get; set; }

        public int Qty { get; set; }
        public decimal UnitPrice { get; set; }

        public virtual SalesMain SalesMain { get; set; }
    }
Now build your project / press f5.

Creating Controller, Context and Views

Right-click on the controller folder and select Add >> Controller
Name it SalesController
Select "SalesMain (MasterDetail.Models)" as a Model Class
Select <new data Context> and give its name "MasterDetail.Models.MasterDetailContext"
Then automatically it will create Views, Controller and Context Class.

Now we have to modify Our Sales Controller Class and Views.

Modify Sales Controller

Modify the existing Create method by the following:

[HttpPost]
        public JsonResult Create(SalesMain salesmain)
        {
            try
            {
                if (ModelState.IsValid)
                {

                    // If sales main has SalesID then we can understand we have existing sales Information
                    // So we need to Perform Update Operation

                    // Perform Update
                    if (salesmain.SalesId > 0)
                    {

                        var CurrentsalesSUb = db.SalesSubs.Where(p => p.SalesId == salesmain.SalesId);

                        foreach (SalesSub ss in CurrentsalesSUb)
                            db.SalesSubs.Remove(ss);

                        foreach (SalesSub ss in salesmain.SalesSubs)
                            db.SalesSubs.Add(ss);

                        db.Entry(salesmain).State = EntityState.Modified;
                    }
                    //Perform Save
                    else
                    {
                        db.SalesMains.Add(salesmain);
                    }

                    db.SaveChanges();
                     // If Sucess== 1 then Save/Update Successfull else there it has Exception
                   return Json(new { Success = 1, SalesID = salesmain.SalesId, ex="" });
                }
            }
            catch (Exception ex)
            {
                // If Sucess== 0 then Unable to perform Save/Update Operation and send Exception to View as JSON
                return Json(new { Success = 0, ex = ex.Message.ToString() });
            }

            return Json(new { Success = 0, ex = new Exception("Unable to save").Message.ToString() });
        }

Modify the Edit method in the following way:

public ActionResult Edit(int id)
        {
            ViewBag.Title = "Edit";
            SalesMain salesmain = db.SalesMains.Find(id);

            //Call Create View
            return View("Create", salesmain);
        }

Delete the "Edit method" with Http post because we will use a Create method for performing a Save and Update operation.

Finally the sales controller looks like the following.

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Entity;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MasterDetail.Models;
using System.Web.Helpers;
using System.Data.Objects;

namespace MasterDetail.Controllers
{
    public class SalesController : Controller
    {
        private MasterDetailContext db = new MasterDetailContext();

        //
        // GET: /Sales/
        public ViewResult Index()
        {
            return View(db.SalesMains.ToList());
        }

        //
        // GET: /Sales/Details/5

        public ViewResult Details(int id)
        {
            SalesMain salesmain = db.SalesMains.Find(id);
            return View(salesmain);
        }

        //
        // GET: /Sales/Create

        public ActionResult Create()
        {
            ViewBag.Title = "Create";
            return View();
        }



        // POST: /Sales/Create
        /// <summary>
        /// This method is used for Creating and Updating Sales Information
        /// (Sales Contains: 1.SalesMain and *SalesSub )
        /// </summary>
       /// <param name="salesmain">
        /// </param>
        /// <returns>
        /// Returns Json data Containing Success Status, New Sales ID and Exeception
        /// </returns>
        [HttpPost]
        public JsonResult Create(SalesMain salesmain)
        {
            try
            {
                if (ModelState.IsValid)
                {

                    // If sales main has SalesID then we can understand we have existing sales Information
                    // So we need to Perform Update Operation

                    // Perform Update
                    if (salesmain.SalesId > 0)
                    {

                        var CurrentsalesSUb = db.SalesSubs.Where(p => p.SalesId == salesmain.SalesId);

                        foreach (SalesSub ss in CurrentsalesSUb)
                            db.SalesSubs.Remove(ss);

                        foreach (SalesSub ss in salesmain.SalesSubs)
                            db.SalesSubs.Add(ss);

                        db.Entry(salesmain).State = EntityState.Modified;
                    }
                    //Perform Save
                    else
                    {
                        db.SalesMains.Add(salesmain);
                    }

                    db.SaveChanges();

                    // If Sucess== 1 then Save/Update Successfull else there it has Exception
                    return Json(new { Success = 1, SalesID = salesmain.SalesId, ex="" });
                }
            }
            catch (Exception ex)
            {
                // If Sucess== 0 then Unable to perform Save/Update Operation and send Exception to View as JSON
                return Json(new { Success = 0, ex = ex.Message.ToString() });
            }

            return Json(new { Success = 0, ex = new Exception("Unable to save").Message.ToString() });
        }

        //
        // GET: /Sales/Edit/5
        public ActionResult Edit(int id)
        {
            ViewBag.Title = "Edit";
            SalesMain salesmain = db.SalesMains.Find(id);

            //Call Create View
            return View("Create", salesmain);
        }


        // GET: /Sales/Delete/5
        public ActionResult Delete(int id)
        {
            SalesMain salesmain = db.SalesMains.Find(id);
            return View(salesmain);
        }



        // POST: /Sales/Delete/5
        [HttpPost, ActionName("Delete")]
        public ActionResult DeleteConfirmed(int id)
        {
            SalesMain salesmain = db.SalesMains.Find(id);
            db.SalesMains.Remove(salesmain);
            db.SaveChanges();
            return RedirectToAction("Index");
        }
        protected override void Dispose(bool disposing)
        {
            db.Dispose();
            base.Dispose(disposing);
        }
    }
}

Modifying Create View

Add the following *.js and *.css file.

@*This is for jquery*@
<script src="../../Scripts/jquery-1.5.1.js" type="text/javascript"></script>
@*This is for jquery UI, for Calender control*@
<script src="../../Scripts/jquery-ui-1.8.11.js" type="text/javascript"></script>

@*This is for JSON*@
<script src="../../Scripts/json2.js" type="text/javascript"></script>

@*These are for DataTables*@
<script src="../../Scripts/DataTables-1.8.1/media/js/jquery.dataTables.js" type="text/javascript"></script>
<script src="../../Scripts/DataTables-1.8.1/extras/TableTools/media/js/TableTools.js" type="text/javascript"></script>
<script src="../../Scripts/DataTables-1.8.1/extras/TableTools/media/js/ZeroClipboard.js" type="text/javascript"></script>

@*These are for styling Control*@
<link href="../../Content/DataTables-1.8.1/extras/TableTools/media/css/TableTools.css" rel="stylesheet" type="text/css" />
<link href="../../Content/DataTables-1.8.1/extras/TableTools/media/css/TableTools_JUI.css" rel="stylesheet" type="text/css" />
<link href="../../Content/themes/base/jquery.ui.all.css" rel="stylesheet" type="text/css" />

Add HTML table for manipulating list of data

After adding a HTML table, we have converted it to a DataTable so that we can easily add/delete an item and read an item more easily.

<table class="tbl" id="tbl">
       <thead>
       <tr>
       <th>ItemName</th> <th>Quantity</th><th>Unit Price</th>
       </tr>
       </thead>

       <tbody>
       @if (Model != null)
       {
           foreach (var item in Model.SalesSubs)
           {
           <tr>
           <td>
           @Html.DisplayTextFor(i => item.ItemName)
           </td>
           <td>
           @Html.DisplayTextFor(i => item.Qty)
           </td>
           <td>
           @Html.DisplayTextFor(i => item.UnitPrice)
           </td>

           </tr>
           }
       }

       </tbody>

       </table>

This is a simple HTML table; then we used the following jQuery for converting it to a DataTable.

$(document).ready(function () {

        // here i have used datatables.js (jQuery Data Table)
        $('.tbl').dataTable({
            "sDom": 'T<"clear">lfrtip',
            "oTableTools": {
                "aButtons": [],
                "sRowSelect": "single"
            },
            "bLengthChange": false,
            "bFilter": false,
            "bSort": false,
            "bInfo": false
        });


        var oTable = $('.tbl').dataTable();
    });

Adding new row to Table

The following code shows how to read from text boxes and then add them to a DataTable.

function Add() {
        // Adding item to table
        $('.tbl').dataTable().fnAddData([$('#ItemName').val(), $('#Qty').val(), $('#UnitPrice').val()]);

        // Making Editable text empty
        $('#ItemName').val("")
        $('#Qty').val("")
        $('#UnitPrice').val("")

     }

Delete selected row from Table

Following code shows how to remove a selected item from a DataTable.

// This function is used fro
    // delete selected row from Detail Table|
    // set deleted item to Edit text Boxes
    function DeleteRow() {

        // Here I have used DataTables.TableTools plugin for getting selected row items
        var oTT = TableTools.fnGetInstance('tbl'); // Get Table instance
        var sRow = oTT.fnGetSelected(); // Get Selected Item From Table


        // Set deleted row item to editable text boxes
        $('#ItemName').val($.trim(sRow[0].cells[0].innerHTML.toString()));
        $('#Qty').val(jQuery.trim(sRow[0].cells[1].innerHTML.toString()));
        $('#UnitPrice').val($.trim(sRow[0].cells[2].innerHTML.toString()));

        $('.tbl').dataTable().fnDeleteRow(sRow[0]);

    }

Save/Posting Data to sales Controller

Here we have two steps:

Read view data and create JSON object

Ajax post

Summery

I have discussed about Sales Controller and only create view. Index, details and Delete views are skipped because they are as usual. Edit view has deleted because here we have used Create view for performing both a create and an edit operation.