how to invoke wcf service having list parameter

Question

I have a webservice as below

   <OperationContract()>
   <Web.WebGet(UriTemplate:="/GetData?strErrMsg={strErrMsg}&chrErrFlg={chrErrFlg}", ResponseFormat:=WebMessageFormat.Json, BodyStyle:=WebMessageBodyStyle.Wrapped)> _
    Function GetData(ByRef strErrMsg As System.Collections.Generic.List(Of String), ByRef chrErrFlg As String) As String

And I am trying to fetch it as

http:localhost//BedTypeMasterService.svc/GetData?strErrMsg="ff"&chrErrFlg="dd"

But it is giving following error

Operation 'GetData' in contract 'iBedTypeMaster' has a query variable named 'strErrMsg' of type 'System.Collections.Generic.List1[System.String]', but type 'System.Collections.Generic.List1[System.String]' is not convertible by 'QueryStringConverter'. Variables for UriTemplate query values must have types that can be converted by 'QueryStringConverter'.

Please help me out to solve this

Laxmikant · Answer

Your querystring values are mismatching make sure you have the url as per the URIPattern and do not add any  marks in url. At client side you will have to use webclient to show the which return from WCF Restful services. for more info on WCF Restful services please check http://dotnetmentors.com/wcf/wcf-rest-service-to-get-or-post-json-data-and-retrieve-json-data-with-datacontract.aspx