Henrik's Blog

Henrik works at Microsoft building software for the Web. You can also find me on twitter -- my twitter handle is @frystyk.

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  • Blog Post: ASP.NET Web API Released and a Preview of What’s Next

    Today we announced the release of Visual Studio 2012 and .NET 4.5 which of course includes ASP.NET Web API . There is a ton of new features in VS 2012 and I highly recommend checking out the videos by Scott Hanselman demonstrating a broad set of features of VS 2012 and .NET 4.5. In addition to shipping...
  • Blog Post: ASP.NET Web API Samples on Codeplex

    Here’s how to get up and running with the ASP.NET Web API and HttpClient samples that you can find in our samples repository on aspnet.codeplex.com . For a list of the samples please see List of ASP.NET Web API and HttpClient Samples as well as our list of samples on www.asp.net . Prerequisites The samples...
  • Blog Post: HttpClient, HttpClientHandler, and WebRequestHandler Explained

    In two previous blogs I describe how to use HttpClient as well as how to use the HttpMessageHandler pipeline . What we haven’t done explicitly is showing when and how to use HttpClient , HttpClientHandler , and WebRequestHandler . This is the purpose of this blog. The first thing to remember is that...
  • Blog Post: ASP.NET Web API Updates – May 14

    We have been on a roll with respect to changes over the last few weeks – here’s some of the highlights. If you want to see the full list then you can either track the commit page or follow the project which will then show you the updates on your codeplex home page . As in the previous update this is...
  • Blog Post: ASP.NET Web API Updates – May 3

    Some interesting updates were checked in over the last week. As in the previous update this is a sneak-peak of code checked into our CodePlex source code repository but hasn’t yet been released as part of our official installer . See Using Nightly ASP.NET Web Stack NuGet Packages for how to try out these...
  • Blog Post: ASP.NET Web API Updates – April 27

    Here’s a few more updates coming your way in ASP.NET Web API. As in the previous update the code has been checked into our CodePlex source code repository but hasn’t yet been released as part of our official installer . Think of this as a sneak-peak for you to try out and comment on as part of our source...
  • Blog Post: Recent ASP.NET Web API Updates – April 24

    Here’s a few updates coming your way in ASP.NET Web API. The code has been checked into our CodePlex source code repository but hasn’t yet been released as part of our official installer . Think of this as a sneak-peak for you to try out and comment on as part of our source code repository (see Getting...
  • Blog Post: ASP.NET Web API Content Negotiation and Accept-Charset

    There are several good blogs on content negotiation in ASP.NET Web API (see for example ASP.NET Web API: How content negotiation works? ) describing how to get JSON, XML, and other response formats depending on what you ask for in a request using the Accept HTTP request header field . However, recently...
  • Blog Post: Async Mashups using ASP.NET Web API

    This blog shows an example of how to build an ASP.NET Web API ApiController that asynchronously talks to multiple other Web APIs in parallel without blocking a thread on the server. Btw, if you have detected a certain theme in these blogs around using Tasks with ASP.NET Web API then you are indeed on...
  • Blog Post: Asynchronous File Upload using ASP.NET Web API

    HTML Form File upload (defined in RFC 1867 ) is a classic mechanism for uploading content to a Web server and is supported by all browsers that I am aware of. This blog shows how to handle Form File Upload in ASP.NET Web API asynchronously using the Task-based pattern introduced in .NET 4 and enhanced...
  • Blog Post: Async Streaming in ASP.NET Web API

    ASP.NET Web API supports asynchronous actions using the new Task-based programming model introduced in .NET 4. In .NET 4.5 the model has improved further and in addition is supported directly from C# using the new async and await keywords (see “ Visual Studio Asynchronous Programming ” for background...
  • Blog Post: Using ASP.NET Web API with ASP.NET Web Forms

    Several of the ASP.NET Web API tutorials (see for example “Your First ASP.NET Web API” ) show how you can use ASP.NET Web API with MVC applications. However, you can equally well add a Web API to a Web Form enabling the same Web API support as in MVC applications. To show how you do this, let’s build...
  • Blog Post: ASP.NET Web API and HttpClient Available on NuGet

    If you don’t need the full ASP.NET MVC 4 installer with project and item templates for Visual Studio 2010 then you can download the various ASP.NET Web API packages directly from NuGet (see list of packages below). If you are new to NuGet then it is a Visual Studio extension that makes it easy to add...
  • Blog Post: Using MongoDB with ASP.NET Web API

    MongoDB is a popular NoSQL database that makes it a great backend for Web APIs which lend themselves towards a document store rather than a relational store . In this blog we show how you can use MongoDB with ASP.NET Web API to build an ApiController with support for HTTP GET, PUT, POST, and DELETE....
  • Blog Post: Using JSON.NET with ASP.NET Web API

    Json.Net is a popular framework for working with JSON. In particular, it has a bunch of features that are not supported by the DataContractJsonSerializer such as being much more flexible in what kind of types it can serialize and exactly how they should be serialized. The ASP.NET Web API supports an...
  • Blog Post: HttpClient: Downloading to a Local File

    Downloading content to a local file is a common thing to do. The current version of HttpClient doesn’t yet provide out of the box support for saving content to a file but this sample shows how to extend HttpClient with new ways of reading content retrieved using HttpClient. Please see List of ASP.NET...
  • Blog Post: Push and Pull Streams using HttpClient

    One of the common discussions to have around network APIs is whether streams should be push or pull . That is, do you push content to the network, or does the infrastructure pull it from you and copy it to the network? In general there is no “right” way of determining this, it is a matter of taste and...
  • Blog Post: Extending HttpClient with OAuth to Access Twitter

    Many popular Web APIs such as the twitter API use some form of OAuth for authentication. HttpClient does not have baked in support for OAuth but using the HttpClient extensibility model you can add OAuth as part of the HttpMessageHandler pipeline. The HttpMessageHandler pipeline is the main extensibility...
  • Blog Post: HttpClient is Here!

    HttpClient is a modern HTTP client for .NET. It provides a flexible and extensible API for accessing all things exposed through HTTP. HttpClient has been available for a while as part of WCF Web API preview 6 but is now shipping as part of ASP.NET Web API and directly in .NET 4.5. You can also download...
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