Null argument values passed from HTML form to WCF REST function

Question

I have created a RESTful WCF service with a method that will be used to save data using a POST. I want to test this method from an HTML form. The following HTML form and interface definition (and related .cs code) result in the SaveTest function getting called when I hit the form Submit button, however the one argument id is always set to null.

HTML form:

<form action="http://localhost:1378/MyService.svc/SaveTest" method="post">
    <input type="text" id="id"/>
    <input type="submit" value="Submit" />
</form>

Interface definition:

[OperationContract]
[WebInvoke(Method = "POST", UriTemplate = "SaveTest")]
Stream SaveTest(string id);

What am I missing here?

Edit

Our WCF service has some other methods that use GET that are working without any issues

i.e. [WebGet(UriTemplate = "GetByTransactionID/{transactionID}")]

Answer 1

There was a similar question on StackOverflow awhile back. Looks like that poster was successful using a slightly different method.