This document discusses how to create a proxy class and consume web services from clients. It provides two methods for creating clients: adding a web reference or creating a proxy using WSDL.EXE. It then explains how the proxy class is used to call web services. The document also provides an overview of key elements in a WSDL document, including messages, ports, types, and bindings. It describes how WSDL is used to describe and locate web services.

1. Creating a Proxy Class and Consuming the Webservices from the Clients:
We have 2 methodologies of creating clients
1. Add webrefernce
2. Creating proxy by using WSDL.EXE
 After creating the Webservice Right click on .asmx file and Click on Browse
 Copy the url.
 Open VS2008 Command prompt.
 Follow the steps given in the below given screen shot.
How WebServices will be called from a Proxy:
WSDL is usefull in generating the Proxy class:

2.  WSDL stands for Webservices description Language.
 WSDL is written in XML
 WSDL is an XML document
 WSDL is used to describe Web services
 WSDL is also used to locate Web services
WSDL Contains the below elements:
WSDL Ports
The <portType> element is the most important WSDL element.
It describes a web service, the operations that can be performed, and the messages that are
involved.
The <portType> element can be compared to a function library (or a module, or a class) in a
traditional programming language.
WSDL Messages
The <message> element defines the data elements of an operation.
Each message can consist of one or more parts. The parts can be compared to the parameters
of a function call in a traditional programming language.
WSDL Types
The <types> element defines the data types that are used by the web service.
For maximum platform neutrality, WSDL uses XML Schema syntax to define data types.
The WSDL Document Structure
A WSDL document describes a web service using these major elements:
Element Description
<types> A container for data type definitions used by the web service
<message> A typed definition of the data being communicated
<portType> A set of operations supported by one or more endpoints
<binding> A protocol and data format specification for a particular port type
The main structure of a WSDL document looks like this:

3. <definitions>
<types>
data type definitions........
</types>
<message>
definition of the data being communicated....
</message>
<portType>
set of operations......
</portType>
<binding>
protocol and data format specification....
</binding>
</definitions>
A WSDL document can also contain other elements, like extension elements, and a service
element that makes it possible to group together the definitions of several web services in one
single WSDL document.
WSDL Bindings
The <binding> element defines the message format and protocol details for each port.