WCF error : 405 Method Not Allowed

Question

Going nuts with this issue. I have a solution with 2 projects, one of them is a plain old html with jquery ajax call while the other is a WCF service. The html page will iss

Answer 1

You need to use JSONP for a cross-domain call to get round the browser restrictions, and to update your web.config with crossDomainScriptAccessEnabled set to true to get round server ones. There's a good example in the answer here: how to avoid cross domain policy in jquery ajax for consuming wcf service?

You may also have a problem with GET requests. Try the fixes outlined here: Making a WCF Web Service work with GET requests

Altogether, you want a web.config that looks something like this:

(Note that both the service and the endpoint have behaviours attached, allowing webHttp calls and httpGet calls respectively, and that the binding has crossDomain access explicitly enabled).

... a service method decorated like this:

[ServiceContract]
public interface IMyService
{
    [WebGet] // Required Attribute to allow GET
    [OperationContract]
    string MyMethod(string MyParam);
}

... and a client call using JSONP: