Step 1 : Create Database Table.

CREATE DATABASE OnlineShop;
USE OnlineShop;
/* *****Customer Table***** */
CREATE TABLE Customer
(
	CustomerId UNIQUEIDENTIFIER PRIMARY KEY DEFAULT newsequentialid(),
	Name NVARCHAR(50) NOT NUll,
	Address NVARCHAR(MAX) NUll,
	OrderDate DATETIME NOT NULL
);
/* *****Orders Table***** */
CREATE TABLE Orders
(
	OrderId UNIQUEIDENTIFIER PRIMARY KEY DEFAULT newsequentialid(),
	ProductName NVARCHAR(150) NOT NUll,
	Quantity INT NOT NULL,
	Price DECIMAL NOT NULL,
	Amount DECIMAL NUll,
	CustomerId UNIQUEIDENTIFIER Not Null,
	FOREIGN KEY (CustomerId) REFERENCES Customer(CustomerId)
);

Step 2 : Create New Project And Connect Your Database Using Entity Framework (As Like Above Video).

Step 3 : Now Write Below Code In Your Controller (Pass All Database Data Controller To View) 

          "OrdersController.cs"

OnlineShopEntities db = new OnlineShopEntities();

        public ActionResult Index()
        {
            List<Customer> OrderAndCustomerList = db.Customers.ToList();
            return View(OrderAndCustomerList);
        }

Step 4 : Now Write Below Code In Your View (Receive All Database Data From Controller And Display Those Data In Client Side) 

           "Index.cshtml"

@model IEnumerable<MasterDetailDemo.Models.Customer>
<br /><br />
<div class="panel panel-default">
    <div class="panel-heading">
        <div class="row">
            <h2 class="panel-title pull-left" style="margin-left:10px;">
                <strong>Order Details</strong>
            </h2>
            <button style="margin-right:10px" class="btn btn-primary pull-right" onclick="addNewOrder()">New Order</button>
        </div>
    </div>

    @*Receive All Database Data From Controller And Display Those Data In Client Side*@

    @if (Model.Count() != 0)
    {
        foreach (var item in Model)
        {
            <div class="panel-body">
                <table class="table table-striped table-responsive">
                    <tbody>
                        <tr>
                            <td>Customer Name : @item.Name </td>
                            <td>Address : @item.Address </td>
                            <td>Order Date : @item.OrderDate</td>
                        </tr>
                        <tr>
                            <td colspan="3">
                                <table class="table table-bordered">
                                    <tbody>
                                        <tr>
                                            <th>Product</th>
                                            <th>Quantity</th>
                                            <th>Unit Price</th>
                                            <th>Total</th>
                                        </tr>
                                        @{
                                            var totalBill = 0;
                                        }
                                        @foreach (var order in item.Orders)
                                        {
                                            <tr>
                                                <td>@order.ProductName</td>
                                                <td>@order.Quantity</td>
                                                <td>@order.Price</td>
                                                <td>@order.Amount</td>
                                            </tr>
                                            totalBill = totalBill + @Convert.ToInt32(order.Amount);
                                        }
                                    </tbody>
                                </table>
                                <span class="pull-right" style="margin-right:100px;"><strong>Total Bill :  </strong> @totalBill</span>
                            </td>
                        </tr>
                    </tbody>
                </table>
            </div>
        }
    }
    else
    {
        <div class="panel-body">
            <h3 style="color:red;">Empty!</h3>
        </div>

    }
</div>

Step 5 : Now Desing A Bootstrap Modal With Order Form In Your View ( For Receive New Order ) 

@*Desing Bootdtrap Modal With Order Form*@

<div class="modal fade" id="newOrderModal">
    <div class="modal-dialog modal-lg" style=" width: 900px !important;">
        <div class="modal-content">
            <div class="modal-header">
                <a href="#" class="close" data-dismiss="modal">&times;</a>
                <h4>Add New Order</h4>
            </div>
            <form id="NewOrderForm">
                <div class="modal-body">
                    @*Customer Details*@
                    <h5 style="color:#ff6347">Customer Details</h5>
                    <hr />
                    <div class="form-horizontal">
                        <input type="hidden" id="CustomerId" />
                        <div class="form-group">
                            <label class="control-label col-md-2">
                                Customer Name
                            </label>
                            <div class="col-md-4">
                                <input type="text" id="name" name="name" placeholder="Customer Name" class="form-control" />
                            </div>
                            <label class="control-label col-md-2">
                                Address
                            </label>
                            <div class="col-md-4">
                                <input type="text" id="address" name="address" placeholder="Customer Address" class="form-control" />
                            </div>
                        </div>
                    </div>

                    @*Order Details*@
                    <h5 style="margin-top:10px;color:#ff6347">Order Details</h5>
                    <hr />
                    <div class="form-horizontal">
                        <input type="hidden" id="OrderId" />
                        <div class="form-group">
                            <label class="control-label col-md-2">
                                Product Name
                            </label>
                            <div class="col-md-4">
                                <input type="text" id="productName" name="productName" placeholder="Product Name" class="form-control" />
                            </div>
                            <label class="control-label col-md-2">
                                Price
                            </label>
                            <div class="col-md-4">
                                <input type="number" id="price" name="price" placeholder="Product Price" class="form-control" />
                            </div>
                        </div>

                        <div class="form-group">
                            <label class="control-label col-md-2">
                                Quantity
                            </label>
                            <div class="col-md-4">
                                <input type="number" id="quantity" name="quantity" placeholder="Quantity" class="form-control" />
                            </div>
                            <div class="col-md-2 col-lg-offset-4">
                                <a id="addToList" class="btn btn-primary">Add To List</a>
                            </div>
                        </div>

                        <table id="detailsTable" class="table">
                            <thead>
                                <tr>
                                    <th style="width:30%">Product</th>
                                    <th style="width:20%">Unit Price</th>
                                    <th style="width:15%">Quantity</th>
                                    <th style="width:25%">Amount</th>
                                    <th style="width:10%"></th>
                                </tr>
                            </thead>
                            <tbody></tbody>
                        </table>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="reset" class="btn btn-default" data-dismiss="modal">Close</button>
                    <button id="saveOrder" type="submit" class="btn btn-danger">Save Order</button>
                </div>
            </form>
        </div>
    </div>
</div>

Step 6 : Now Write Below Jquery Ajax Code In Your View ( For Receive Data From Order Form And Pass It To Controller ) 

@section scripts{
    <script>
        //Show Modal.
        function addNewOrder() {
            $("#newOrderModal").modal();
        }
        //Add Multiple Order. 
        $("#addToList").click(function (e) {
            e.preventDefault();

            if ($.trim($("#productName").val()) == "" || $.trim($("#price").val()) == "" || $.trim($("#quantity").val()) == "") return;

            var productName = $("#productName").val(),
                price = $("#price").val(),
                quantity = $("#quantity").val(),
                detailsTableBody = $("#detailsTable tbody");

            var productItem = '<tr><td>' + productName + '</td><td>' + quantity + '</td><td>' + price + '</td><td>' + (parseFloat(price) * parseInt(quantity)) + '</td><td><a data-itemId="0" href="#" class="deleteItem">Remove</a></td></tr>';
            detailsTableBody.append(productItem);
            clearItem();
        });
        //After Add A New Order In The List, Clear Clean The Form For Add More Order.
        function clearItem() {
            $("#productName").val('');
            $("#price").val('');
            $("#quantity").val('');
        }
        // After Add A New Order In The List, If You Want, You Can Remove It.
        $(document).on('click', 'a.deleteItem', function (e) {
            e.preventDefault();
            var $self = $(this);
            if ($(this).attr('data-itemId') == "0") {
                $(this).parents('tr').css("background-color", "#ff6347").fadeOut(800, function () {
                    $(this).remove();
                });
            } 
        });
        //After Click Save Button Pass All Data View To Controller For Save Database
        function saveOrder(data) {
            return $.ajax({
                contentType: 'application/json; charset=utf-8',
                dataType: 'json',
                type: 'POST',
                url: "/Orders/SaveOrder",
                data: data,
                success: function (result) {
                    alert(result);
                    location.reload();
                },
                error: function () {
                    alert("Error!")
                }
            });
        }
        //Collect Multiple Order List For Pass To Controller
        $("#saveOrder").click(function (e) {
            e.preventDefault();

            var orderArr = [];
            orderArr.length = 0;

            $.each($("#detailsTable tbody tr"), function () {
                orderArr.push({
                    productName: $(this).find('td:eq(0)').html(),
                    quantity: $(this).find('td:eq(1)').html(),
                    price: $(this).find('td:eq(2)').html(),
                    amount: $(this).find('td:eq(3)').html()
                });
            });


            var data = JSON.stringify({
                name: $("#name").val(),
                address: $("#address").val(),
                order: orderArr
            });

            $.when(saveOrder(data)).then(function (response) {
                console.log(response);
            }).fail(function (err) {
                console.log(err);
            });
        });
    </script>
}

Step 7 : Now Write Below  Code In Your Controller( For Receive Passing Data From View And Save It Database ) 

 public ActionResult SaveOrder(string name, String address, Order[] order)
        {
            string result = "Error! Order Is Not Complete!";
            if (name != null && address != null && order != null)
            {
                var cutomerId = Guid.NewGuid();
                Customer model = new Customer();
                model.CustomerId = cutomerId;
                model.Name = name;
                model.Address = address;
                model.OrderDate = DateTime.Now;
                db.Customers.Add(model);

                foreach (var item in order)
                {
                    var orderId = Guid.NewGuid();
                    Order O = new Order();
                    O.OrderId = orderId;
                    O.ProductName = item.ProductName;
                    O.Quantity = item.Quantity;
                    O.Price = item.Price;
                    O.Amount = item.Amount;
                    O.CustomerId = cutomerId;
                    db.Orders.Add(O);
                }
                db.SaveChanges();
                result = "Success! Order Is Complete!";
            }
            return Json(result, JsonRequestBehavior.AllowGet);
        }

Now Run This Project