3、完成抽象的Web Service定义（optional）
该步骤的目的是获取wsdl定义。这里笔者为了省事，用Visual Studio.Net自动生成，所以写了个抽象的Web Service类，实际开发中完全可以独立编写wsdl文件。
C#
using System.Web.Services;
using System.Xml.Serialization;
namespace DemoService
{
[WebService(Name="QuoteService", Namespace="http://www.visionlogic.com/trade")]
public abstract class QuoteServiceBase : WebService
{
[WebMethod()]
[return:XmlElement("Quote", Namespace="http://www.visoinlogic.com/trade")]
public abstract Quote GetQuote(string id);
}
}
WSDL
<?xml version="1.0" encoding="utf-8"?>
<wsdl:definitions
xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
xmlns:tm=http://microsoft.com/wsdl/mime/textMatching/
xmlns:soapenc=http://schemas.xmlsoap.org/soap/encoding/
xmlns:mime=http://schemas.xmlsoap.org/wsdl/mime/
xmlns:tns=http://www.visionlogic.com/trade
xmlns:s1=http://www.visoinlogic.com/trade
xmlns:s=http://www.w3.org/2001/XMLSchema
xmlns:soap12=http://schemas.xmlsoap.org/wsdl/soap12/
xmlns:http=http://schemas.xmlsoap.org/wsdl/http/
targetNamespace=http://www.visionlogic.com/trade
xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">
<wsdl:types>
<s:schema elementFormDefault="qualified" targetNamespace="http://www.visionlogic.com/trade">
<s:import namespace="http://www.visoinlogic.com/trade" />
<s:element name="GetQuote">
<s:complexType>
<s:sequence>
<s:element minOccurs="0" maxOccurs="1" name="id" type="s:string" />
</s:sequence>
</s:complexType>
</s:element>
<s:element name="GetQuoteResponse">
<s:complexType>
<s:sequence>
<s:element minOccurs="0" maxOccurs="1" ref="s1:Quote" />
</s:sequence>
</s:complexType>
</s:element>
… …
<wsdl:service name="QuoteService">
<wsdl:port name="QuoteServiceSoap" binding="tns:QuoteServiceSoap">
<soap:address location="http://localhost:2401/QuoteServiceBase.asmx" />
</wsdl:port>
<wsdl:port name="QuoteServiceSoap12" binding="tns:QuoteServiceSoap12">
<soap12:address location="http://localhost:2401/QuoteServiceBase.asmx" />
</wsdl:port>
</wsdl:service>
</wsdl:definitions>
