<wsdl:types />
<wsdl:message name="AddSoapIn">
<wsdl:part name="a" type="s:int" />
<wsdl:part name="b" type="s:int" />
</wsdl:message>
<wsdl:message name="AddSoapOut">
<wsdl:part name="AddResult" type="s:int" />
</wsdl:message>
<wsdl:portType name="MathServiceSoap">
<wsdl:operation name="Add">
<wsdl:input message="tns:AddSoapIn" />
<wsdl:output message="tns:AddSoapOut" />
</wsdl:operation>
</wsdl:portType>
<wsdl:binding name="MathServiceSoap" type="tns:MathServiceSoap">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="document" />
<wsdl:operation name="Add">
<soap:operation soapAction="http://idior.cnblogs.com/Math/Add" style="rpc" />
<wsdl:input>
<soap:body use="encoded" namespace="http://tempuri.org/" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" />
</wsdl:input>
<wsdl:output>
<soap:body use="encoded" namespace="http://tempuri.org/" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
<wsdl:message name="AddSoapIn">
<wsdl:part name="a" type="s:int" />
<wsdl:part name="b" type="s:int" />
</wsdl:message>
<wsdl:message name="AddSoapOut">
<wsdl:part name="AddResult" type="s:int" />
</wsdl:message>
<wsdl:portType name="MathServiceSoap">
<wsdl:operation name="Add">
<wsdl:input message="tns:AddSoapIn" />
<wsdl:output message="tns:AddSoapOut" />
</wsdl:operation>
</wsdl:portType>
<wsdl:binding name="MathServiceSoap" type="tns:MathServiceSoap">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="document" />
<wsdl:operation name="Add">
<soap:operation soapAction="http://idior.cnblogs.com/Math/Add" style="rpc" />
<wsdl:input>
<soap:body use="encoded" namespace="http://tempuri.org/" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" />
</wsdl:input>
<wsdl:output>
<soap:body use="encoded" namespace="http://tempuri.org/" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
以上是一段wsdl的片斷，其中主要定義了一個Add方法。針對粗體字部分，我們得到以下使用該webservice的soap請求。
POST /WebService1/Service1.asmx HTTP/1.1
Host: localhost
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://idior.cnblogs.com/Math/Add"
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:tns="http://tempuri.org/" xmlns:types="http://tempuri.org/encodedTypes" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body soap:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<tns:Add>
<a xsi:type="xsd:int">int</a>
<b xsi:type="xsd:int">int</b>
</tns:Add>
</soap:Body>
</soap:Envelope>
Host: localhost
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://idior.cnblogs.com/Math/Add"
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:tns="http://tempuri.org/" xmlns:types="http://tempuri.org/encodedTypes" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body soap:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<tns:Add>
<a xsi:type="xsd:int">int</a>
<b xsi:type="xsd:int">int</b>
</tns:Add>
</soap:Body>
</soap:Envelope>
可以看出在WSDL中定義好的SoapAction被放在了Http的請求頭中， 為了調用Add這個WebService中的方法，SOAP包中粗體字部分發出的請求恰恰對應了WSDL中定義的operation的name---Add.
那么對于下面的WSDL文件，我們又該發出怎樣的SOAP請求呢？
<wsdl:types>
<s:schema elementFormDefault="qualified" targetNamespace="http://tempuri.org/">
<s:element name="Add">
<s:complexType>
<s:sequence>
<s:element minOccurs="1" maxOccurs="1" name="a" type="s:int" />
<s:element minOccurs="1" maxOccurs="1" name="b" type="s:int" />
</s:sequence>
</s:complexType>
</s:element>
<s:element name="AddReponse">
<s:complexType>
<s:sequence>
<s:element minOccurs="1" maxOccurs="1" name="AddOperationResult" type="s:int" />
</s:sequence>
</s:complexType>
</s:element>
</s:schema>
</wsdl:types>
<wsdl:message name="AddOperationSoapIn">
<wsdl:part name="parameters" element="tns:Add" />
</wsdl:message>
<wsdl:message name="AddOperationSoapOut">
<wsdl:part name="parameters" element="tns:AddReponse" />
</wsdl:message>
<wsdl:portType name="MathServiceSoap">
<wsdl:operation name="AddOperation">
<wsdl:input message="tns:AddOperationSoapIn" />
<wsdl:output message="tns:AddOperationSoapOut" />
</wsdl:operation>
</wsdl:portType>
<wsdl:binding name="MathServiceSoap" type="tns:MathServiceSoap">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="document" />
<wsdl:operation name="AddOperation">
<soap:operation soapAction="http://idior.cnblogs.com/Math/Add" style="document" />
<wsdl:input>
<soap:body use="literal" />
</wsdl:input>
<wsdl:output>
<soap:body use="literal" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
<s:schema elementFormDefault="qualified" targetNamespace="http://tempuri.org/">
<s:element name="Add">
<s:complexType>
<s:sequence>
<s:element minOccurs="1" maxOccurs="1" name="a" type="s:int" />
<s:element minOccurs="1" maxOccurs="1" name="b" type="s:int" />
</s:sequence>
</s:complexType>
</s:element>
<s:element name="AddReponse">
<s:complexType>
<s:sequence>
<s:element minOccurs="1" maxOccurs="1" name="AddOperationResult" type="s:int" />
</s:sequence>
</s:complexType>
</s:element>
</s:schema>
</wsdl:types>
<wsdl:message name="AddOperationSoapIn">
<wsdl:part name="parameters" element="tns:Add" />
</wsdl:message>
<wsdl:message name="AddOperationSoapOut">
<wsdl:part name="parameters" element="tns:AddReponse" />
</wsdl:message>
<wsdl:portType name="MathServiceSoap">
<wsdl:operation name="AddOperation">
<wsdl:input message="tns:AddOperationSoapIn" />
<wsdl:output message="tns:AddOperationSoapOut" />
</wsdl:operation>
</wsdl:portType>
<wsdl:binding name="MathServiceSoap" type="tns:MathServiceSoap">
<soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="document" />
<wsdl:operation name="AddOperation">
<soap:operation soapAction="http://idior.cnblogs.com/Math/Add" style="document" />
<wsdl:input>
<soap:body use="literal" />
</wsdl:input>
<wsdl:output>
<soap:body use="literal" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
現在為了調用AddOperation（注意 Add改成AddOperation了）方法，你認為Soap Body中對應的那個元素名???是什么呢？
POST /WebService1/Service1.asmx HTTP/1.1
Host: localhost
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://idior.cnblogs.com/Math/Add"
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<??? xmlns="http://tempuri.org/">
<a>int</a>
<b>int</b>
</???>
</soap:Body>
</soap:Envelope>
Host: localhost
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://idior.cnblogs.com/Math/Add"
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<??? xmlns="http://tempuri.org/">
<a>int</a>
<b>int</b>
</???>
</soap:Body>
</soap:Envelope>
原理說明
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