Sunday, 20 November 2022

Select Insert Edit Update and Delete (CRUD) with DropDownList using jQuery Ajax in ASP.Net MVC

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@model IEnumerable<CRUD_jQuery_MVC.Customer>
 
@{
    Layout = null;
}
 
<!DOCTYPE html>
 
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    <table id="tblCustomers" class="table" cellpadding="0" cellspacing="0">
        <tr>
            <th>Customer Id</th>
            <th>Name</th>
            <th>Country</th>
            <th></th>
        </tr>
        <tr>
            <td>&nbsp;</td>
            <td>&nbsp;</td>
            <td>&nbsp;</td>
            <td>&nbsp;</td>
        </tr>
        @foreach (Customer customer in Model)
        {
            <tr>
                <td class="CustomerId">
                    <span>@customer.CustomerId</span>
                </td>
                <td class="Name">
                    <span>@customer.Name</span>
                    <input type="text" value="@customer.Name" style="display:none" />
                </td>
                <td class="Country">
                    <span>@customer.Country</span>
                    @*<input type="text" value="@customer.Country" style="display:none" />*@
                    @Html.DropDownList("selection", new List<SelectListItem>()
                                                       {
                                                           new SelectListItem { Text="India", Value="1" },
                                                           new SelectListItem { Text="Australia", Value="2" },
                                                           new SelectListItem { Text="USA", Value="3" }
                                                       }, new { @style = "display:none;width:90px;height:25px;", @id = "ddlEditCountry" })
                </td>
                <td>
                    <a class="Edit" href="javascript:;">Edit</a>
                    <a class="Update" href="javascript:;" style="display:none">Update</a>
                    <a class="Cancel" href="javascript:;" style="display:none">Cancel</a>
                    <a class="Delete" href="javascript:;">Delete</a>
                </td>
            </tr>
        }
    </table>
    <table border="0" cellpadding="0" cellspacing="0">
        <tr>
            <td>
                Name<br />
                <input type="text" id="txtName" style="width:140px" />
            </td>
            <td>
                Country:<br />
                @*<input type="text" id="txtCountry" style="width:140px" />*@
                @Html.DropDownList("selection", new List<SelectListItem>()
                                                       {
                                                           new SelectListItem { Text="India", Value="1" },
                                                           new SelectListItem { Text="Australia", Value="2" },
                                                           new SelectListItem { Text="USA", Value="3" }
                                                       }, new { @style = "width:90px;height:25px;", @id = "ddlAddCountry" })
            </td>
            <td style="width: 200px">
                <br />
                <input type="button" id="btnAdd" value="Add" />
            </td>
        </tr>
    </table>
 
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
    <script type="text/javascript" src="http://ajax.cdnjs.com/ajax/libs/json2/20110223/json2.js"></script>
    <script type="text/javascript">
        $(function () {
            //Remove the dummy row if data present.
            if ($("#tblCustomers tr").length > 2) {
                $("#tblCustomers tr:eq(1)").remove();
            }
        });
        function AppendRow(row, customerId, name, country) {
            //Bind CustomerId.
            $(".CustomerId", row).find("span").html(customerId);
 
            //Bind Name.
            $(".Name", row).find("span").html(name);
            $(".Name", row).find("input").val(name);
 
            //Bind Country.
            $(".Country", row).find("span").html(country);
            $(".Country", row).find("input").val(country);
            $("#tblCustomers").append(row);
        };
 
        //Add event handler.
        $("body").on("click", "#btnAdd", function () {
            var txtName = $("#txtName");
            var ddlCountry = $("#ddlAddCountry").find("option:selected");
            $.ajax({
                type: "POST",
                url: "/Home/InsertCustomer",
                data: '{name: "' + txtName.val() + '", country: "' + ddlCountry.text() + '" }',
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (r) {
                    var row = $("#tblCustomers tr:last-child").clone(true);
                    AppendRow(row, r.CustomerId, r.Name, r.Country);
                    txtName.val("");
                }
            });
        });
 
        //Edit event handler.
        $("body").on("click", "#tblCustomers .Edit", function () {
            var row = $(this).closest("tr");
            $("td", row).each(function () {
                if ($(this).find("input").length > 0 || $(this).find("select").length > 0) {
                    $(this).find("input").show();
                    $(this).find("select").show();
                    $(this).find("span").hide();
                }
            });
            row.find(".Update").show();
            row.find(".Cancel").show();
            row.find(".Delete").hide();
            $(this).hide();
        });
 
        //Update event handler.
        $("body").on("click", "#tblCustomers .Update", function () {
            var row = $(this).closest("tr");
            $("td", row).each(function () {
                if ($(this).find("input").length > 0) {
                    //debugger;
                    var span = $(this).find("span");
                    var input = $(this).find("input");
                    span.html(input.val());
                    span.show();
                    input.hide();
                }
                if ($(this).find("select").length > 0) {
                    //debugger
                    var span = $(this).find('span');
                    var select = $(this).find("select");
                    span.html($(this).find("select").find("option:selected").text());
                    select.hide();
                    span.show();
                }
            });
            row.find(".Edit").show();
            row.find(".Delete").show();
            row.find(".Cancel").hide();
            $(this).hide();
            var customer = {};
            customer.CustomerId = row.find(".CustomerId").find("span").html();
            customer.Name = row.find(".Name").find("span").html();
            customer.Country = row.find(".Country").find("option:selected").text();
            $.ajax({
                type: "POST",
                url: "/Home/UpdateCustomer",
                data: '{customer:' + JSON.stringify(customer) + '}',
                contentType: "application/json; charset=utf-8",
                dataType: "json"
            });
        });
 
        //Cancel event handler.
        $("body").on("click", "#tblCustomers .Cancel", function () {
            var row = $(this).closest("tr");
            $("td", row).each(function () {
                if ($(this).find("input").length > 0 || $(this).find("select").length > 0) {
                    var span = $(this).find("span");
                    var input = $(this).find("input");
                    var select = $(this).find("select");
                    input.val(span.html());
                    span.show();
                    input.hide();
                    select.hide();
                }
            });
            row.find(".Edit").show();
            row.find(".Delete").show();
            row.find(".Update").hide();
            $(this).hide();
        });
 
        //Delete event handler.
        $("body").on("click", "#tblCustomers .Delete", function () {
            if (confirm("Do you want to delete this row?")) {
                var row = $(this).closest("tr");
                var customerId = row.find("span").html();
                $.ajax({
                    type: "POST",
                    url: "/Home/DeleteCustomer",
                    data: '{customerId: ' + customerId + '}',
                    contentType: "application/json; charset=utf-8",
                    dataType: "json",
                    success: function (response) {
                        row.remove();
                    }
                });
            }
        });
    </script>
</body>
</html>

Controller

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public class HomeController : Controller
{
    // GET: Home
    public ActionResult Index()
    {
        CustomersEntities entities =new CustomersEntities();
        return View(entities.Customers);
    }
 
    [HttpPost]
    public JsonResult InsertCustomer(Customer customer)
    {
        using (CustomersEntities entities =new CustomersEntities())
        {
            entities.Customers.Add(customer);
            entities.SaveChanges();
        }
 
        return Json(customer);
    }
 
    [HttpPost]
    public ActionResult UpdateCustomer(Customer customer)
    {
        using (CustomersEntities entities =new CustomersEntities())
        {
            Customer updatedCustomer = (from cin entities.Customers
                                        where c.CustomerId == customer.CustomerId
                                        select c).FirstOrDefault();
            updatedCustomer.Name = customer.Name;
            updatedCustomer.Country = customer.Country;
            entities.SaveChanges();
        }
 
        return new EmptyResult();
    }
 
    [HttpPost]
    public ActionResult DeleteCustomer(int customerId)
    {
        using (CustomersEntities entities =new CustomersEntities())
        {
            Customer customer = (from cin entities.Customers
                                    where c.CustomerId == customerId
                                    select c).FirstOrDefault();
            entities.Customers.Remove(customer);
            entities.SaveChanges();
        }
        return new EmptyResult();
    }
}

Screenshot

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