In this article I will explain with an example, how to perform Select, Insert, Edit, Update and Delete operation using Web API and AngularJS in ASP.Net MVC.
Note: For beginners in ASP.Net MVC and Web API, please refer my article What is Web API, why to use it and how to use it in ASP.Net MVC.
 
 

Database

I have made use of the following table Customers with the schema as follows.
AngularJS Web API CRUD – Select Insert Edit Update and Delete using Web API and AngularJS in ASP.Net MVC
 
I have already inserted few records in the table.
AngularJS Web API CRUD – Select Insert Edit Update and Delete using Web API and AngularJS in ASP.Net MVC
Note: You can download the database table SQL by clicking the download link below.
          Download SQL file
 
 

Entity Framework Model

Once the Entity Framework is configured and connected to the database table, the Model will look as shown below.
Note: For beginners in ASP.Net MVC and Entity Framework, please refer my article ASP.Net MVC: Simple Entity Framework Tutorial with example. It covers all the information needed for connecting and configuring Entity Framework.
 
AngularJS Web API CRUD – Select Insert Edit Update and Delete using Web API and AngularJS in ASP.Net MVC
 
 

Controller

The Controller consists of the following Action method.

Action method for handling GET operation

Inside this Action method, simply the View is returned.
public class HomeController : Controller
{
    // GET: Home
    public ActionResult Index()
    {
        return View();
    }
}
 
 

Namespaces

You will need to import the following namespace.
using System.Linq;
 
 

Web API Controller

The Web API Controller consists of the following Action methods.

Action method for Selecting

Inside this Action method, all the records from the Customers table are fetched using Entity Framework returned to the View as a generic List collection.
 

Action method for Inserting

This Action method handles the call made from the AngularJS AJAX function from the View.
Inside this Action method, the received Customer object is inserted into the Customers table and the updated Customer object with generated CustomerId is returned back to the AngularJS AJAX function.
 

Action method for Updating

This Action method handles the call made from the AngularJS AJAX function from the View.
Inside this Action method, the Customer object is received as parameter. The CustomerId value of the received Customer object is used to reference the Customer record in the CustomerEntities.
Finally, once the record is referenced, the values of Name and Country are updated and the changes are updated into the Customer table.

Action method for Deleting

This Action method handles the call made from the AngularJS AJAX function from the View.
Inside this Action method, the Customer object is received as parameter. The CustomerId value of the received Customer object is used to reference the Customer record in the CustomerEntities.
Finally, once the record is referenced, the Customer record is deleted from the Customers table.
public class AjaxAPIController : ApiController
{
    [Route("api/AjaxAPI/GetCustomers")]
    [HttpPost]
    public List<Customer>GetCustomers()
    {
        CustomersEntities entities = new CustomersEntities();
        return entities.Customers.ToList();
    }
 
    [Route("api/AjaxAPI/InsertCustomer")]
    [HttpPost]
    public Customer InsertCustomer(Customer customer)
    {
        using (CustomersEntities entities = new CustomersEntities())
        {
            entities.Customers.Add(customer);
            entities.SaveChanges();
        }
 
        return customer;
    }
 
    [Route("api/AjaxAPI/UpdateCustomer")]
    [HttpPost]
    public bool UpdateCustomer(Customer customer)
    {
        using (CustomersEntities entities = new CustomersEntities())
        {
            Customer updatedCustomer = (from c in entities.Customers
                                        where c.CustomerId  == customer.CustomerId
                                        select c).FirstOrDefault();
            updatedCustomer.Name = customer.Name;
            updatedCustomer.Country = customer.Country;
            entities.SaveChanges();
        }
 
        return true;
    }
 
    [Route("api/AjaxAPI/DeleteCustomer")]
    [HttpPost]
    public void DeleteCustomer(Customer _customer)
    {
        using (CustomersEntities entities = new CustomersEntities())
        {
            Customer customer = (from c in entities.Customers
                                    where c.CustomerId == _customer.CustomerId
                                    select c).FirstOrDefault();
            entities.Customers.Remove(customer);
            entities.SaveChanges();
        }
    }
}
 
 

View

Inside the View, the following AngularJS file is inherited.
1. angular.min.js
 
The View consists of an HTML DIV to which ng-app and ng-controller AngularJS directives have been assigned.
Note: If you want to learn more about these directives please refer my article Introduction to AngularJS.
 
The HTML DIV consists of an HTML Table with only the Header row and another Table below it for adding new records to the database.
The Table contains two HTML INPUT TextBox for capturing Name and Country values.
There is also a Button which will be used to add new records and it has been assigned with an AngularJS ng-click directive.
Note: If you want to learn more about ng-click directive, please refer my article AngularJS: Implement Button click event using ng-click directive example.
 
The INPUT TextBoxes have been applied with an AngularJS ng-model directive which allows changes in the input field to update the model.

Display

For displaying the records, an AJAX call is made to the GetCustomers Action method of the Controller using AngularJS $http service function.
Note: If you want to learn more about these directives, please refer my article AngularJS: $http POST example with Parameters.
 
The database records are received in JSON format and are assigned to Customers JSON array.
The Customers JSON array is used to populate the HTML Table using ng-repeat directive of AngularJS.
 

Insert

When the Add button is clicked the Name and the Country values are fetched from their respective TextBoxes and then passed to the InsertCustomer Action method using the using AngularJS $http service function.
Once the response is received, the newly added record is pushed into the Customers JSON array.
 

Edit

When the Edit Button is clicked, the Index of the HTML Table row is determined and is used to determine the Customer record being edited.
The EditMode property is set to TRUE for the Customer record which makes the TextBoxes visible for that row.
 

Update

When the Update Button is clicked, the Index of the HTML Table row is determined and is used to determine the Customer record to be updated.
The values of CustomerId, Name and Country are passed to the UpdateCustomer Action method using AngularJS $http service function.
Once the response is received, the EditMode property is set to FALSE for the Customer record which hides the TextBoxes for that row.
 

Cancel

When the Cancel Button is clicked, the Index of the HTML Table row is determined and is used to determine the Customer record for which the edit is being cancelled.
The EditMode property is set to FALSE for the Customer record which hides the TextBoxes for that row.
 

Delete

When the Delete Button is clicked, the value of the CustomerId is fetched and passed to the DeleteCustomer Action method using AngularJS $http service function.
Once the response is received the respective row is removed from the Customers JSON array.
@{
     Layout = null;
}
 
<!DOCTYPE html>
 
<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    <div ng-app="MyApp" ng-controller="MyController">
        <table id="tblCustomers" class="table" cellpadding="0" cellspacing="0"> 
            <tr>
                <th style="width:100px">Customer Id</th>
                <th style="width:150px">Name</th>
                <th style="width:150px">Country</th>
                <th style="width:100px"></th>
            </tr>
            <tbody ng-repeat="m in Customers">
                <tr>
                    <td><span>{{m.CustomerId}}</span></td>
                    <td>
                        <span ng-hide="m.EditMode">{{m.Name}}</span>
                        <input type="text" ng-model="m.Name" ng-show="m.EditMode" />
                    </td>
                    <td>
                        <span ng-hide="m.EditMode">{{m.Country}}</span>
                        <input type="text" ng-model="m.Country" ng-show="m.EditMode" />
                    </td>
                    <td>
                        <a class="Edit" href="javascript:;" ng-hide="m.EditMode" ng-click="Edit($index)">Edit</a> 
                        <a class="Update" href="javascript:;" ng-show="m.EditMode" ng-click="Update($index)">Update</a> 
                        <a class="Cancel" href="javascript:;" ng-show="m.EditMode" ng-click="Cancel($index)">Cancel</a> 
                        <a href="javascript:;" ng-hide="m.EditMode" ng-click="Delete(m.CustomerId)">Delete</a> 
                    </td>
                </tr>
            </tbody>
        </table>
        <table border="0" cellpadding="0" cellspacing="0">
            <tr>
                <td style="width:150px">
                    Name<br />
                    <input type="text" ng-model="Name" style="width:140px" />
                </td>
                <td style="width:150px">
                    Country:<br />
                    <input type="text" ng-model="Country" style="width:140px" />
                </td>
                <td style="width:200px">
                    <br />
                    <input type="button" value="Add" ng-click="Add()" />
                </td>
            </tr>
        </table>
    </div>
    <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.9/angular.min.js"></script>
    <script type="text/javascript">
        var app = angular.module('MyApp', [])
        app.controller('MyController', function ($scope, $http, $window) {
            //Getting records from database.
            var post = $http({
                 method: "POST",
                 url: "/api/AjaxAPI/GetCustomers",
                 dataType: 'json',
                 headers: { "Content-Type":"application/json" }
            });
            post.success(function (data, status) {
                //The received response is saved in Customers array.
                $scope.Customers = data;
            });
 
            //Adding new record to database.
            $scope.Add = function () {
                if (typeof ($scope.Name) == "undefined" || typeof ($scope.Country) == "undefined") {
                    return;
                }
                var post = $http({
                     method: "POST",
                     url: "/api/AjaxAPI/InsertCustomer",
                     data: "{name: '" + $scope.Name + "', country: '" + $scope.Country + "'}",
                     dataType: 'json',
                     headers: { "Content-Type":"application/json" }
                });
                post.success(function (data, status) {
                    //The newly inserted record is inserted into the Customers array.
                    $scope.Customers.push(data)
                });
                $scope.Name = "";
                $scope.Country = "";
            };
 
            //This variable is used to store the original values.
            $scope.EditItem = {};
 
            //Editing an existing record.
            $scope.Edit = function (index) {
                //Setting EditMode to TRUE makes the TextBoxes visible for the row.
                $scope.Customers[index].EditMode = true;
 
                //The original values are saved in the variable to handle Cancel case.
                $scope.EditItem.Name = $scope.Customers[index].Name;
                $scope.EditItem.Country = $scope.Customers[index].Country;
            };
 
            //Cancelling an Edit.
            $scope.Cancel = function (index) {
                // The original values are restored back into the Customers Array.
                $scope.Customers[index].Name = $scope.EditItem.Name;
                $scope.Customers[index].Country = $scope.EditItem.Country;
 
                //Setting EditMode to FALSE hides the TextBoxes for the row.
                $scope.Customers[index].EditMode = false;
                $scope.EditItem = {};
            };
 
            //Updating an existing record to database.
            $scope.Update = function (index) {
                var customer = $scope.Customers[index];
                var post = $http({
                     method: "POST",
                     url: "/api/AjaxAPI/UpdateCustomer",
                     data: JSON.stringify(customer),
                     dataType: 'json',
                     headers: { "Content-Type": "application/json" }
                });
                post.success(function (data, status) {
                    //Setting EditMode to FALSE hides the TextBoxes for the row.
                    customer.EditMode = false;
                });
            };
 
            //Deleting an existing record from database.
            $scope.Delete = function (customerId) {
                if ($window.confirm("Do you want to delete this row?")) {
                    var _customer = {};
                    _customer.CustomerId = customerId;
                    var post = $http({
                         method: "POST",
                         url: "/api/AjaxAPI/DeleteCustomer",
                         data:JSON.stringify(_customer),
                         dataType: 'json',
                         headers: { "Content-Type": "application/json" }
                    });
                    post.success(function (data, status) {
                        //Remove the Deleted record from the Customers Array.
                        $scope.Customers = $scope.Customers.filter(function (customer) {
                            return customer.CustomerId !== customerId;
                        });
                    });
                    post.error(function (data, status) {
                        $window.alert(data.Message);
                    });
                }
            };
        });
    </script>
</body>
</html>
 
 

Screenshot

AngularJS Web API CRUD – Select Insert Edit Update and Delete using Web API and AngularJS in ASP.Net MVC
 
 

Downloads

Download Code