JavaScript AJAX using Api

About This Page

This page is part of an ASP.NET MVC tutorial that showcases how to build dynamic and responsive web applications using AJAX and JavaScript. It allows you to interact with the API to manage employee data efficiently, providing a seamless user experience without full page reloads.

Key Features:

• Dynamic data loading using AJAX:

  
  $.ajax({
      url: "/api/employee",
      type: "GET",
      contentType: "application/json;charset=utf-8",
      dataType: "json",
      success: function (result) {
          $('#EmpSinglePage').DataTable({
              data: result,
              columns: [
                  { data: 'profile_picture' },
                  { data: 'name' },
                  { data: 'genderName' },
                  { data: 'age' },
                  { data: 'state' },
                  { data: 'country' },
                  { data: 'departmentName' },
                  { data: 'id' }
              ]
          });
      },
      error: function (errormessage) {
          alert(errormessage.responseText);
      }
  });
              

• Adding a new employee with AJAX:

  
  const Add = () => {
      var employee = {
          id: +$('#id').val(),
          name: $('#name').val(),
          age: +$('#age').val(),
          state: $('#state').val(),
          country: $('#country').val(),
          department: +$('#department').val()
      };
      $.ajax({
          url: "/api/employee",
          data: JSON.stringify(employee),
          type: "POST",
          contentType: "application/json;charset=utf-8",
          dataType: "json",
          success: function () {
              loadData();
              $('#myModal').modal('hide');
          },
          error: function (errormessage) {
              alert(errormessage.responseText);
          }
      });
  };
              

• Updating an existing employee with AJAX:

  
  const Update = () => {
      var employee = {
          id: +$('#id').val(),
          name: $('#name').val(),
          age: +$('#age').val(),
          state: $('#state').val(),
          country: $('#country').val(),
          department: +$('#department').val()
      };
      $.ajax({
          url: "/api/employee/" + employee.id,
          data: JSON.stringify(employee),
          type: "PUT",
          contentType: "application/json;charset=utf-8",
          dataType: "json",
          success: function () {
              loadData();
              $('#myModal').modal('hide');
          },
          error: function (errormessage) {
              alert(errormessage.responseText);
          }
      });
  };
              

This example serves as a great starting point for building more complex SPAs with robust client-side interactions. By using AJAX for CRUD operations, we achieve a more responsive and interactive user experience.

Pros and Cons of Using JavaScript AJAX in ASP.NET MVC

Pros:

• Improved User Experience: AJAX allows seamless data updates without refreshing the entire page, providing a more responsive and interactive user interface.
• Reduced Server Load: Only the necessary data is sent back and forth, reducing the load on the server and network bandwidth usage.
• Modular Code Structure: The separation of concerns between client-side and server-side code makes the application more maintainable and scalable.
• Dynamic Content Loading: Enables the ability to dynamically load and update specific parts of a webpage, such as tables or forms, based on user interactions.

Cons:

• Increased Complexity: The combination of client-side and server-side logic can become complex and harder to debug, especially with large-scale applications.
• SEO Limitations: Content loaded dynamically through AJAX is not easily indexed by search engines, which can impact the SEO performance of the website.
• JavaScript Dependency: The functionality heavily relies on JavaScript, which can be a limitation if users disable JavaScript in their browsers.
• Security Concerns: Improper implementation of AJAX can expose the application to security vulnerabilities like Cross-Site Scripting (XSS) or Cross-Site Request Forgery (CSRF).