Adding Query String Params to my Swagger Specs
<p>I am using Swashbuckle (swagger for C#) with my Web API.  I have several GET End-Points that return lists and I allow the user to add a perpage and page params into the QueryString</p>

<p>Example: <a href="http://myapi.com/endpoint/?page=5&amp;perpage=10" rel="noreferrer">http://myapi.com/endpoint/?page=5&amp;perpage=10</a></p>

<p>I see that swagger does support parameter in 'query' but how do I get Swashbuckle to do it?</p>

<hr>

<p>I mention in one of the comments that I solved my issue by creating a custom attribute to allow me to do what I needed.  Below is the code for my solution:</p>

<pre><code>[AttributeUsage(AttributeTargets.Method, Inherited = false, AllowMultiple = true)]
public class SwaggerParameterAttribute : Attribute
{
    public SwaggerParameterAttribute(string name, string description)
    {
        Name = name;
        Description = description;
    }

    public string Name { get; private set; }
    public Type DataType { get; set; }
    public string ParameterType { get; set; }
    public string Description { get; private set; }
    public bool Required { get; set; } = false;
}
</code></pre>

<p>Register the Attribute with the Swagger Config:</p>

<pre><code>GlobalConfiguration.Configuration 
    .EnableSwagger(c =&gt;
        {
            c.OperationFilter&lt;SwaggerParametersAttributeHandler&gt;();
        });
</code></pre>

<p>Then add this attribute to your methods:</p>

<pre><code>[SwaggerParameter("page", "Page number to display", DataType = typeof(Int32), ParameterType = ParameterType.inQuery)]
[SwaggerParameter("perpage","Items to display per page", DataType = typeof(Int32), ParameterType = ParameterType.inQuery)]
</code></pre>