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How to Download JSON Data from a URL Using WebClient in C#
JSON (JavaScript Object Notation) is a popular data format for exchanging information between web servers and clients. JSON data can be easily parsed and manipulated using various programming languages, such as C#. In this article, we will show you how to download JSON data from a URL using the WebClient class in C#.
What is WebClient?
WebClient is a class in the System.Net namespace that provides common methods for sending and receiving data from a resource identified by a URI. WebClient can be used to download data as a string, a byte array, or a stream. It can also upload data as a string, a byte array, a stream, or a name-value collection.
WebClient is an abstract class that uses an underlying pluggable protocol for performing network operations. The default implementation uses HTTP or FTP protocols, depending on the scheme of the URI. You can also create your own protocol classes that derive from WebClient and override its methods to use other protocols.
webclient download json
How to Download JSON Data from a URL Using WebClient?
To download JSON data from a URL using WebClient, you need to follow these steps:
Create an instance of the WebClient class.
Call the DownloadString method with the URL of the JSON data as the parameter. This method will return the JSON data as a string.
Optionally, you can use the Encoding property to specify the character encoding of the JSON data.
Optionally, you can use the DownloadStringCompleted event to handle the completion of the download operation asynchronously.
Optionally, you can use the CancelAsync method to cancel the download operation if needed.
Parse the JSON data using a JSON library, such as JSON.NET.
Example of Downloading JSON Data from a URL Using WebClient
In this example, we will download JSON data from a sample URL that returns information about users in JSON format. We will use JSON.NET to parse the JSON data and display some properties of the users.
The sample URL is: https://jsonplaceholder.typicode.com/users
The sample JSON data is:
[
"id": 1,
"name": "Leanne Graham",
"username": "Bret",
"email": "Sincere@april.biz",
"address":
"street": "Kulas Light",
"suite": "Apt. 556",
"city": "Gwenborough",
"zipcode": "92998-3874",
"geo":
"lat": "-37.3159",
"lng": "81.1496"
,
...
,
"id": 2,
"name": "Ervin Howell",
"username": "Antonette",
"email": "Shanna@melissa.tv",
...
,
...
]
The C# code is:
using System;
using System.Net;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
namespace WebClientDemo
{
class Program
{
static void Main(string[] args)
// Create an instance of WebClient
using (WebClient wc = new WebClient())
// Set the encoding to UTF-8
wc.Encoding = System.Text.Encoding.UTF8;
// Subscribe to the DownloadStringCompleted event
wc.DownloadStringCompleted += Wc_DownloadStringCompleted;
// Download the JSON data from the URL
wc.DownloadStringAsync(new Uri("https://jsonplaceholder.typicode.com/users"));
// Wait for user input
Console.ReadLine();
private static void Wc_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
// Check if the download was canceled
if (e.Cancelled)
Console.WriteLine("Download Canceled!");
return;
// Check if there was an error
if (e.Error != null)
Console.WriteLine("Download Error: 0", e.Error.Message);
return;
// Get the JSON data as a string
string json = e.Result; 06063cd7f5
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