Consume Web API data using HttpClient in c#

HttpClient is a base class for sending HTTP requests and receiving HTTP responses from a resource identified by a URI.

Following code example get movies data in JSON format,

Web API code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using Newtonsoft.Json.Linq;
using Newtonsoft.Json;
using System.Threading;
using System.Net.Http.Headers;
public class RestAPICall
    {
        private const string URL = "https://c4utest.com/api/movies/search";
        private const string urlParameters = "?Title=Bahubali ";
     
       public void  DisplayMoviesFromRestAPI()
        {
            using (var client = new HttpClient())
            {
                client.BaseAddress = new Uri(URL);
                // List data response.
                HttpResponseMessage response = client.GetAsync(urlParameters).Result; 
                // blocking call
                if (response.IsSuccessStatusCode)
                {
                    // Parse the response body.
                    var dataObjects = response.Content.ReadAsStringAsync().Result; 
                    //data objects
                    Movies deserializedProduct = JsonConvert.DeserializeObject<Movies>(dataObjects);
                    JObject jsonval = JObject.Parse(dataObjects);
                    if (deserializedProduct != null)
                    {
                        Console.WriteLine("Total movies : "+ deserializedProduct.total);
                        Console.WriteLine("Current page : " + deserializedProduct.page);
                        Console.WriteLine("Total pages : " + deserializedProduct.total_pages);
 
                        //first movie details
                        var firstMoviesDetails = deserializedProduct.data.FirstOrDefault();
                        //Display first moview details from collections
                        Console.WriteLine("First movie title : " + firstMoviesDetails.Title);
                        Console.WriteLine("First movie release year : " + firstMoviesDetails.Year);
                        Console.WriteLine("First movie code : " + firstMoviesDetails.imdbID);
 
                        //display all movies details
                        foreach (var movieDetail in deserializedProduct.data)
                        {
                            Console.WriteLine("Movie title : " + movieDetail.Title);
                            Console.WriteLine("Movie release year : " + movieDetail.Year);
                            Console.WriteLine("Movie code : " + movieDetail.imdbID);
                        }
                    }
                }
                else
                {
                    Console.WriteLine("{0} ({1})", (int)response.StatusCode, response.ReasonPhrase);
                }
            }
        }
    }

Movies class

public class Movies
    {
      public int page { get; set; }
      public int per_page { get; set; }
      public int total { get; set; }
      public int total_pages { get; set; }
      public List<MoviesData> data { get; set; }
    }

MoviesData class 

public class MoviesData
    {
        public string Title { get; set; }
        public int Year { get; set; }
        public string imdbID { get; set; } 
    }

 What is anonymous function in C#?

An anonymous function is an "inline" statement or expression that can be used wherever a delegate type is expected.

You can use it to initialize a named delegate or pass it instead of a named delegate type as a method parameter.

You can use a lambda expression or an anonymous method to create an anonymous function. We recommend using lambda expressions as they provide more concise and expressive way to write inline code.

Reference…https://docs.microsoft.com/

How to use anonymous function in C#?

Anonymous function code examples using,

• Delegate with named method,
• Lambda expression
• Delegate with anonymous method
• Built-in delegates (Func & Action delegates)

delegate void SampleDelegate(string x);

public class AnonymousFunctions
    {
         static void DisplayData(string x)
        {
            Console.WriteLine("Data is :" + x);
        }
        static void AnonymousSamples()
        {
            // initialization with a named method.
            SampleDelegate testNamed = new SampleDelegate(DisplayData);
 
            // C# 2.0: A delegate can be initialized with
            // inline code, called an "anonymous method." This
            // method takes a string as an input parameter.
            SampleDelegate TestAnMethod = delegate (string s) { Console.WriteLine(s); };
 
            // C# 3.0. A delegate initialization with a lambda expression.
            // The lambda also takes a string
            // as an input parameter (x). The type of x is inferred by the compiler.
            SampleDelegate TestLambdaExp = (x) => { Console.WriteLine(x); };
 
            //Anonymous function with action generic delegate
            Action<string> TestDelGeneric = (s) => { Console.WriteLine(s); };
 
            // Anonymous function with action delegate without paremeters.
            Action TestDelActGen = () => { Console.WriteLine("Codechef4U samples"); };
 
            //Anonymous Function with func generic delegate, first 2
            // parameters are input, and last parameter is result
            Func<string, string, string> GetCombinedString = (x, y) => { return x+ " " + y; };
 
            //Anonymous Function with predicate generic delegate
            Predicate<string> isValidSurName = (x) => { return x != null && x.Length >2 ? true : false; };
 
            // Invoke the delegates.
            DisplayData("The named method call using delegate .");
            TestAnMethod("The anonymous method call.");
            TestLambdaExp("The lambda call.");
            TestDelGeneric("The action generic delegate .");
            TestDelActGen();
            Console.WriteLine("Full name is: "+ GetCombinedString("Aditya", "Kendre"));
            Console.WriteLine("Is valid name :" + isValidSurName("Kendre"));
        }
    } 

CSS

Cascading Style Sheets (CSS) is a simple design language released in 1996, CSS describes how HTML elements are to be displayed on screen, paper, or in other media.

CSS 3

CSS3 version introduced new features that allowed developers to style HTML elements with less CSS code.

CSS3 features

Easy to use 

CSS3 allows developers to style HTML elements easier.

Responsive design           

CSS3 is the latest version, hence it supports responsive design.

Box Shadow

One of the CSS3 new features is the box-shadow property that adds a shadow to an element. Instead of using multiple images around an item, this property lets you add shadow with a short line of code.

Separate reusable modules       

CSS3 can be breakdown into modules.

Attribute Selectors

CSS3 also introduced new selectors in addition to the ones in CSS2. Instead of applying IDs or classes for styling, developers can select HTML elements according to their attributes.

Performance and speed  

CSS3 is faster than basic CSS.

Animation    

Animation and 3D transformations are supported

Compatibility          

CSS3 is backwards-compatible with former CSS versions. It means that CSS3 features work on web pages using older CSS. Browsers that support CSS2 also represent the modifications with CSS3..

Color 

CSS3 supports HSL RGBA, HSLA and the gradient colors. i.e. #fff supported.

Rounded corners  

CSS3 provide codes for setting rounded gradients and corners

Text shadow and effects 

CSS3 has many advance features like text shadows, visual effects, and a wide range of font style and color.

Opacity         

One of the CSS3 properties called opacity makes elements see-through or completely transparent.