Call WebServices from ASP using Classes

Calling Web Service from ASP.NET is quite easy. To call Web Services from ASP, we sued to use SOAP SDK. But that is not necessary.

Actually, we can develop a class called, say, WebService, in a ASP page, and use that class to call Web Services. Inside this class, we use:

Set xmlhttp = CreateObject("Microsoft.XMLHTTP")

to communicate between the Web Service and the ASP,a nd then use

Set mCol = CreateObject("Scripting.Dictionary")

to manage the web service parameters in a form.

Once we have the class ready, the caller code is as simple as below (assuming you have already included the webservice class in your page:

dim ws

set ws = new webservice
ws.url = "http://localhost/yourwebservice.asmx"
ws.method = "MethodName"
ws.parameters.Add "ParamName1",1
ws.parameters.Add "ParamName2",300
ws.parameters.Add "ParamNameN",500

ws.execute
response.Write ws.response

set ws = nothing

For details, you can go to: http://www.codeproject.com/asp/aspcallwebservice.asp

The source code of the WebService Page can be downloaded here:

http://www.codeproject.com/asp/aspcallwebservice/aspcallwebservice_src.zip