RestSharp: Deserialize Xml to c# Object return null

Question

i've an xml from some api :

<auditypes>
     <auditype code="a" description="aaa"/>
     <auditype code="b" description="bbb"/>
     <auditype code="c" description="ccc"/>
     <auditype code="d" description="ddd"/>
     <auditype code="e" description="eee"/>
</auditypes>

and mapping as object in C# class :

    public class auditypes
    {
        public List<auditype> auditype { get; set; }
    }

    public class auditype
    {
        public string code { get; set; }
        public string description { get; set; }
    }

I call it with this function :

    public List<auditypes> Execute<auditypes>(RestRequest request) where auditypes : new()
    {
        var client = new RestClient();
        client.BaseUrl = "https://www.myurl.com/auditypes";
        var response = client.Execute<auditypes>(request);

        return response.Data as List<auditypes>;
    }

    public List<auditypes> GetCall()
    {
        var request = new RestRequest();
        request.RequestFormat = DataFormat.Xml;
        request.RootElement = "auditype";
        return Execute<auditypes>(request);
    }

but it always return null, does anyone knows why is this happening?

Yuval Itzchakov · Accepted Answer · 2014-06-11 10:14:15Z

3

The generic parameter passed to Execute<T> is the type that should be deserialized by the RestSharp library. That means that your response.Data property is already of type T, which in your case is auditypes. But when you return you try to cast it to a List<auditypes> where no such cast exists.

Also, there is no need for the type constraint, as your method is not generic as it accepts an explicit type.

Refactor your method:

public auditypes Execute<auditypes>(RestRequest request)
{
    var client = new RestClient();
    client.BaseUrl = "https://www.myurl.com/auditypes";
    var response = client.Execute<auditypes>(request);

    return response.Data;
}

edited Jun 11, 2014 at 10:14

answered Jun 11, 2014 at 8:25

Yuval Itzchakov

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7 Comments

Firma Agnes Over a year ago

it still not return the xml data, but it return length=0 not retun null

Yuval Itzchakov Over a year ago

Are you sure you are receiving a List<auditypes> abd not just auditypes?

Firma Agnes Over a year ago

yes i received that, the return type is List<auditypes> but Data count = 0

Yuval Itzchakov Over a year ago

Is the XML you posted a full one? Or are there more auditypes attributes?

Firma Agnes Over a year ago

I got an error when try it(but forgot what is exactly). The problem isnt in my auditypes function btw, i found it in my answer. Thanks :)

|

Firma Agnes · Accepted Answer · 2014-06-17 02:57:03Z

0

Finally, it work for me :)

public auditypes Execute<auditypes>(RestRequest request) where auditypes : new()
{
    var client = new RestClient();
    client.BaseUrl = "https://www.myurl.com/auditypes";
    var response = client.Execute<auditypes>(request).Data;

    return response;
}

public auditypes GetCall()
{
    var request = new RestRequest();
    request.RequestFormat = DataFormat.Xml;
    return Execute<auditypes>(request);
}

answered Jun 17, 2014 at 2:57

Firma Agnes

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