用C#编写SOAP消息

因为SOAP消息是基于XML文档的，因此在C#中可以使用XmlTextWriter编写SOAP消息

首先定义一个XmlTextWriter

st = new MemoryStream(1024);//分配空间XmlTextWriter tr = new XmlTextWriter(st,Encoding.UTF8);//初始化一个XmlTextWriter,编码方式为Encoding.UTF8

然后就可以开始写入了

 tr.WriteStartDocument();tr.WriteStartElement("soap","Envelope","http://schemas.xmlsoap.org/soap/envelope/");tr.WriteAttributeString("xmlns","xsi",null,"http://www.w3.org/2001/XMLSchema-instance");tr.WriteAttributeString("xmlns","xsd",null,"http://www.w3.org/2001/XMLSchema");tr.WriteAttributeString("xmlns","soap",null,"http://schemas.xmlsoap.org/soap/envelope/");tr.WriteStartElement("Header", "http://schemas.xmlsoap.org/soap/envelope/"); tr.WriteStartElement(null, "AuthInfo", "http://tempuri.org/"); tr.WriteElementString("UserName", "admin"); tr.WriteElementString("PassWord", "123"); tr.WriteEndElement();tr.WriteEndElement();tr.WriteStartElement("Body","http://schemas.xmlsoap.org/soap/envelope/"); tr.WriteStartElement(null,"GetAccount","http://tempuri.org/"); tr.WriteElementString("acctID","1"); tr.WriteEndElement();tr.WriteEndElement(); tr.WriteEndDocument(); //////////////////////////////////////////////////////////////////////////

最后得到的SOAP消息如下：

?<?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:Header><AuthInfo xmlns="http://tempuri.org/"><UserName>admin</UserName><PassWord>123</PassWord></AuthInfo></soap:Header><soap:Body><GetAccount xmlns="http://tempuri.org/"><acctID>1</acctID></GetAccount></soap:Body></soap:Envelope>

SOAP的格式讲解在http://www.w3school.com.cn/soap/index.asp上讲的很详细了，这里就不再赘述