ASP.NET C# serialize HttpValueCollection

Question

I'm trying to serialize a Request object for logging purposes. The code

System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(obj.GetType());
// obj is a Request object

gives me the following exception:

To be XML serializable, types which inherit from ICollection must have an implementation of Add(System.String) at all levels of their inheritance hierarchy. System.Web.HttpValueCollection does not implement Add(System.String).

How to solve the problem? Thanks.

In title you are saying that you are trying to serialize HttpValueCollection and in description you are saying Request (HttpRequest?). Can you be more clear about your question? — HABJAN
– HABJAN, Commented Mar 31, 2011 at 8:07

Marc Gravell · Accepted Answer · 2011-03-31 08:02:25Z

1

In short, trying to serialize a http request object may not end well; even if you get past the current issue, I would expect it to fail in a few more places.

You should construct your own object model that includes those parts of the request you care about, in a simple form. In the case of the HttpValueCollection, you may need to add a basic collection of some type that is a name/value pair.

Then: populate your new model from the actual request, and serialize your model.

answered Mar 31, 2011 at 8:02

Marc Gravell

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Simon Mourier · Accepted Answer · 2011-03-31 08:14:52Z

0

If you're interested in the request as a whole (ie: bytes), you can use the HttpRequest.Filter Property. It allows to install a filter (an object that derives from Stream) that can read and write from the raw input HTTP request.

Here is an article on the subject: Filtering HTTP Requests with .NET

answered Mar 31, 2011 at 8:14

Simon Mourier

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Tony · Accepted Answer · 2013-10-20 02:39:46Z

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I didn't try it but this would likely work and would be available to serialize.

HttpContext.Current.Request.GetType()
                .GetProperties()
                .Select(
                    a =>
                        new KeyValuePair<object, object>(a, HttpContext.Current.Request.GetType().GetProperty(a.GetType().Name)))
                .ToList();

edited Oct 20, 2013 at 2:39

answered Oct 18, 2013 at 20:09

Tony

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