CODEWITHSUNDEEP
asp.netweb-servicesroutesquery-stringroutedata
IAmLearnings
IAmLearnings

Reputation: 21

How Do I Get RouteData Values from a Web Service in .Net 4.0

I am trying to extract an id number from a URL using a web service so that it can be used as a parameter for a where clause in a select statement that produces data from a database based on the id number of a record. That data will then be passed back to the page to populate an element in a jQuery modal popup widow.

Everything works fine with a static id number (ex: string postid = "120"), but I don't know how to get the id number from the URL. I'm using Routing in .Net 4 and the method for accessing Routing in pages does not work in a web service. In pages I just do stuff like var id = RouteData.Values["id"]; and that gets the id, but when i did it in a web service I got an error:

CS0120: An object reference is required for the non-static field, method, or property 'System.Web.Routing.RouteData.Values.get'

Summary:

I have web service accessed form a details page where I want to get RouteData for the page making the request. I want to do this just as easily as I can on a page using RouteData.Values which is just as easy as the now the obsolete Request.Querystring.

Now I am more confused because although I could easily add a new route for the web service I don't know I would call that using jQuery Ajax because of the webservice.asmx/webmethod syntax.

Right now I have URL: "../webservices/googlemaps.asmx/GetGoogleMap" in my jQuery Ajax, but that is not a real URL. It only exists in jQuery somewhere and the way to call the service using just JavaScript is no a real URL either, its webservice.webmethod() which in this case would be googlemaps.GetGoogleMap().

I will try registering a route for webservices/googlemaps.asmx/GetGoogleMap/postid, but I doubt it will work because GetGoogleMap is not a directory or a querystring.

Upvotes: 2

Views: 5097

Answers (1)

VinayC
VinayC

Reputation: 49175

Get current http request and use RequestContext property to get request context - it has current routing data. For example,

var id = HttpContext.Current.Request.RequestContext.RouteData.Values["id"];

In case of WCF based web service, make sure that service is participating in ASP.NET pipeline (see ASP.NET Compatibility)

EDIT: Sorry for misleading answer - the above will not work unless web service url is registered in routing engine. However, it may not solve your issue of retrieving the id - what kind of service implementation are you using? Are you making a GET request or POST request? Typically, web service handler (asmx) or WCF pipeline should convert GET/POST parameters to method parameters. Post your web service code and how you invoke it.

Upvotes: 7

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