how to invoke wcf service having list parameter

Mayur Gujrathi

13y10.9k

I have a webservice as below

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

2 Replies

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Arup Bhattacharya8y ago
Do some thing like this:

In contract file

[OperationContract] [WebGet(UriTemplate = "/TabelasAuxiliares?requestex={requestex}", ResponseFormat = WebMessageFormat.Xml)] CadastrodeEscolasResponse TabelasAuxiliares(string requestex);

In the Service file

public CadastrodeEscolasResponse TabelasAuxiliares(string requestex)
{
XmlSerializer serializer = new XmlSerializer(typeof(CadastrodeEscolasRequest));
StringReader rdr = new StringReader(requestex);
CadastrodeEscolasRequest request = (CadastrodeEscolasRequest)serializer.Deserialize(rdr);
}

Conslusion: Call the service by sending Xml format data to a string parameter. Then convert the xml to the required class object. This way you can avoid creating QueryStringConvertor which is quite cumbersome. Hope this will help! This help is for all and not just for this post.
+2
Laxmikant13y ago
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 https://geeksarray.com/blog/wcf-rest-service-to-get-or-post-json-data-and-retrieve-json-data-with-datacontract
+2