Error while accessing wcf-rest function

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I am getting following error when i try to access the wcf-rest.

Operation 'Login' in contract 'SelectorFront' specifies Method 'Get' on the WebGetAttribute/WebInvokeAttribute, but the only allowed values for Method are GET or POST. Other values are not supported by 'System.ServiceModel.Description.WebScriptEnablingBehavior'.

I have created a wcf-rest, with 1 method "Login" and has one parameter "Username"
This is my function call.
http://localhost:2664/FrontService.svc/Login?Username=max

And my wcf is as following

Interface

C#

[OperationContract]
[WebInvoke(Method = "Get", UriTemplate = "/Login/{UserName}", ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json)] 
string Login(string UserName);

Service

C#

public string Login(string UserName)
{
tblUser obj = (from m in dataContext.tblUsers
where m.UserName == UserName
select m).First();
JavaScriptSerializer oSerializer = new JavaScriptSerializer();
string sJSON = oSerializer.Serialize(obj);
return sJSON;
}

what is the solution of this issue

Posted 19-Dec-12 2:53am

markand911

Updated 19-Dec-12 4:49am

Abhishek Pant

v2

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Oleksandr Kulchytskyi · Answer 1 · 2012-12-20T04:44:00

Hi , I suppose that this little issue hidden behind the scene of your Uri template.
So, obviously, you could try declare your method in next format:

C#

[OperationContract]
[WebInvoke(Method = "Get", UriTemplate = "Login?UserName={UserName}", ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.WrappedRequest)]
string Login(string UserName);

And after that you parameter might be successfully routed to method parameter called UserName.

C#

public string Login(string UserName)
{
tblUser obj = (from m in dataContext.tblUsers
where m.UserName == UserName
select m).First();
JavaScriptSerializer oSerializer = new JavaScriptSerializer();
string sJSON = oSerializer.Serialize(obj);
return sJSON;
}