A simple Test Client built on top of ASP.NET Web API Help Page

Step 1: Install the Test Client package

Install the WebApiTestClient package from the NuGet Package Manager. Make sure to “Include Prerelease” then just type in “WebApiTestClient” and click Install.

Once the package is installed, it will add the following files to your project:

Scripts\WebApiTestClient.js
Areas\HelpPage\TestClient.css
Areas\HelpPage\Views\Help\DisplayTemplates\TestClientDialogs.cshtml
Areas\HelpPage\Views\Help\DisplayTemplates\TestClientReferences.cshtml

It will also pull in the ASP.NET Web API Help Page package if it’s not already installed.

Step 2: Wire up the Test Client on Help Page

Open the file Api.cshtml (under Areas\HelpPage\Views\Help) and add the following:

@Html.DisplayForModel("TestClientDialogs")
@Html.DisplayForModel("TestClientReferences")

Note that you add the @Html.DisplayForModel("TestClientDialogs") after the <div> and @Html.DisplayForModel("TestClientReferences") inside the Scripts section.

You need to have the following JavaScript libraries installed. They should be installed if you used the default Web API template. Now, if you have different version numbers, you can update the references in TestClientReferences.cshtml.

jQuery 1.7.1
jQuery.UI.Combined 1.8.20
knockoutjs 2.1.0

Once everything is wired up correctly, you should see the “Test API” button appearing on the bottom right corner of the API page.

Testing Web APIs

Now you can click on the “Test API” button to start testing the APIs. For each URI parameters, it will automatically provide a text box so that you can fill in the value instead of editing the URI. Note that the URI automatically gets updated as you fill in the parameter values.

After you click on Send, another dialog will pop up showing you the response.

Adding Request Headers

You can add additional request headers by clicking “Add Header”. For example, you can add the accept header “text/xml” to ask for XML.

And sure enough, your Web API returned the content as XML.

Providing Request Body

For methods like POST, you can provide the body in the Body section. Note that it will be prepopulated with the samples from Help Page so you don’t need to do any copy-pasting.

And you can select different samples based on the supported media types. For instance, selecting application/xml will pull in the XML sample. Note that the content-type and content-length headers are updated accordingly.