No MediaTypeFormatter is available

[HamitEnes]

Hello,

I Have aspnet webapi project .Net Framework 4.6.1 and installed below nuget package.

'package id="Marvin.JsonPatch" version="2.1.1" targetFramework="net461" '

I have an ODataController and Patch method with HttpPatch attribute

public class SalesInvoicesController : Microsoft.AspNet.OData.ODataController
{
[System.Web.Http.HttpPatch]
public IHttpActionResult Patch([FromODataUri] int key, [FromBody] JsonPatchDocument'SalesInvoice' salesInvoicePatch)
{
// get the expense from the repository
SalesInvoice existingSalesInvoice = ....

            // apply the patch document 
            salesInvoicePatch.ApplyTo(existingSalesInvoice);
    }

}

using POSTMAN for example request either application/json or application/json-patch+json content-type request fail with this exception. I couldn't find any info in readme about that.

Exception thrown: 'System.Net.Http.UnsupportedMediaTypeException' in System.Net.Http.Formatting.dll No MediaTypeFormatter is available to read an object of type 'JsonPatchDocument`1' from content with media type 'application/json-patch+json'.

request body like that,

[
{
"op": "replace",
"path" : "/DocumentNo",
"value" : "A-303030"
}
]

response http 415 Unsupported Media Type

Additional Info : I added this part of code to my app start from one of closed issues

        config.Formatters.JsonFormatter.SupportedMediaTypes.Add(
            new MediaTypeHeaderValue("application/json-patch+json"));

How can I solve that? Thanks

Is there any additional setup for usage this nuget?