How to call a webservice programmatically in asp.net

Question

How to call webservice programmatically in asp.net without using add web reference? My webservice url keeps on changing. Hence i need to capture the url at runtime and display the results. Please advice.

Answer 1

You can change the URL of a web-reference at runtime (provided that the new address is hosting a service with the same schema that you originally used to create the reference):

MyWebService ms = new MyWebService();
ms.Url = "http://example.com/webservice.asmx";
ms.MyWebMethod();

Web References are definitely the way to go - whilst the classes that are created by the web reference are usually pretty heavy, all that strong typing makes it well worth your while.

Answer 2

you need to do the following steps.

PreReq : First of all, you know the URL of web service.

Solution: use wsdl.exe to create a proxy class and than compile it.

wsdl /out:myProxyClass.cs http://hostServer/WebserviceRoot/WebServiceName.asmx?WSDL

(there are other switches available for wsdl. For Example to generate VB class, you need to add switch /language:VB)

Once your proxy class is generated you can easily consume in code.

MyProxyClass objService = new MyProxyClass();
DateTime time = objService.GetServerTime(); //Suppose service has  method getServerTime