Three methods to generate a WSDL File

. Add the wdsl requirement after the URL of the web service, as shown below:

Http: // localhost/webexamples/simpleservice. asmx? WSDL

2.use disco.exe. Write the following command in the command line:

Disco http: // localhost/webexamples/simpleservice. asmx

3. Use the class provided in the namespace system. Web. Services. Description

The root element of each WSDL file is <definitions>, which must provide a complete description of the service. First, declarations of various namespaces must be provided in the <definitions> element.

The <definitions> element contains one or more <porttype> elements, each of which is a series of operations. You can think of a single porttype element as a logical grouping of classes composed of various methods. Each types should be called a service, so the entire WSDL file will become a service set.

There can be several methods or operation in each service. WSDL references them through the <operation> element.