How to test a web api post method which receives a class
<p>I have created an ASP.NET web API which has a controller named <code>ImageSaveController</code>. This has an <code>InsertImage</code> method which inserts data into database and is an <code>HttpPost</code> method. This method receives an object of type <code>ImageData</code> as a parameter. The code for the controller and the parameter class are given below:</p>

<pre><code>public class ImageSaveController : ApiController
{
    [HttpPost]
    public IHttpActionResult InsertImage(ImageData imageData)
    {
        System.Data.SqlClient.SqlConnection conn = null;
        try
        {               
            //Image save to database code here
        }
        catch (Exception ex)
        {
            return Content(HttpStatusCode.NotModified, ex.Message);
        }
        finally
        {
            if (conn != null)
                conn.Close();
        }
        return Content(HttpStatusCode.OK,""); 
    }
}

//ImageData class
public class ImageData
{
    public int Id { get; set; }
    public byte[] ImageValue { get; set; }
}
</code></pre>

<p>I would like to test it from a client. As you can notice, the <code>ImageValue</code> property of the <code>ImageData</code> class is a <code>byte</code> array. Not sure how to pass the C# class parameter to this method. Ideally I would like to pass the parameter as <code>json</code> and I am not sure how to construct the <code>json</code> for this purpose. I am also not sure whether it could be tested using the chrome app called postman.</p>