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by Mike Wasson and Rick Anderson
Download Completed Project. Download instructions.
This tutorial shows how to call a web API from a .NET application, using System.Net.Http.HttpClient.
In this tutorial, a client app is written that consumes the following web API:
To learn how to implement this API with ASP.NET Web API, see Creating a Web API that Supports CRUD Operations.
For simplicity, the client application in this tutorial is a Windows console application. HttpClient is also supported for Windows Phone and Windows Store apps. For more information, see Writing Web API Client Code for Multiple Platforms Using Portable Libraries
Create the Console Application
In Visual Studio, create a new Windows console app named HttpClientSample and paste in the following code:
The preceding code is the complete client app. How to download amazon prime movies to mac.
RunAsync runs and blocks until it completes. Most HttpClient methods are async, because they perform network I/O. All of the async tasks are done inside RunAsync . Normally an app doesn't block the main thread, but this app doesn't allow any interaction.
Install the Web API Client Libraries
Use NuGet Package Manager to install the Web API Client Libraries package.
From the Tools menu, select NuGet Package Manager > Package Manager Console. In the Package Manager Console (PMC), type the following command:
Install-Package Microsoft.AspNet.WebApi.Client
The preceding command adds the following NuGet packages to the project:
Json.NET is a popular high-performance JSON framework for .NET.
Add a Model Class
Examine the
Product class:
This class matches the data model used by the web API. An app can use HttpClient to read a
Product instance from an HTTP response. The app doesn't have to write any deserialization code.
Create and Initialize HttpClient
Examine the static HttpClient property:
HttpClient is intended to be instantiated once and reused throughout the life of an application. The following conditions can result in SocketException errors:
Creating a new HttpClient instance per request can exhaust the available sockets.
The following code initializes the HttpClient instance:
The preceding code:
Send a GET request to retrieve a resource
The following code sends a GET request for a product:
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The GetAsync method sends the HTTP GET request. When the method completes, it returns an HttpResponseMessage that contains the HTTP response. If the status code in the response is a success code, the response body contains the JSON representation of a product. Call ReadAsAsync to deserialize the JSON payload to a
Product instance. The ReadAsAsync method is asynchronous because the response body can be arbitrarily large.
HttpClient does not throw an exception when the HTTP response contains an error code. Instead, the IsSuccessStatusCode property is false if the status is an error code. If you prefer to treat HTTP error codes as exceptions, call HttpResponseMessage.EnsureSuccessStatusCode on the response object.
EnsureSuccessStatusCode throws an exception if the status code falls outside the range 200–299. Note that HttpClient can throw exceptions for other reasons — for example, if the request times out.
Rest Api Client For MacMedia-Type Formatters to Deserialize
When ReadAsAsync is called with no parameters, it uses a default set of media formatters to read the response body. The default formatters support JSON, XML, and Form-url-encoded data.
Instead of using the default formatters, you can provide a list of formatters to the ReadAsAsync method. Using a list of formatters is useful if you have a custom media-type formatter:
For more information, see Media Formatters in ASP.NET Web API 2
Sending a POST Request to Create a ResourceRest Api Client For Firefox
The following code sends a POST request that contains a
Product instance in JSON format:
The PostAsJsonAsync method:
If the request succeeds: Realtek sound video and game controller driver.
Sending a PUT Request to Update a Resource
The following code sends a PUT request to update a product: Autoclicker for mac.
Can you download spotify on ipod nano 6. The PutAsJsonAsync method works like PostAsJsonAsync, except that it sends a PUT request instead of POST.
Sending a DELETE Request to Delete a ResourceTorrent Client For Mac
The following code sends a DELETE request to delete a product: Vshpere client for mac.
Like GET, a DELETE request does not have a request body. Nero 2019 serial key generator. You don't need to specify JSON or XML format with DELETE.
Test the sample
https://treeforum778.weebly.com/best-gui-ssh-client-for-mac.html. To test the client app:
Download Client For Mac
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