让方法返回XML对象

•默认以JSON格式返回数据
•使用ScriptMethodAttribute进行标记
–ResponseFormat属性设为Xml
–Response的Content-Type将为text/xml
•可以使用字符串拼接出XML并输出
•可以返回Xml相关类型
–XmlDocument、XmlElement
•返回普通对象时将使用XmlSerializer输出
–可以使用.NET中强大的XML序列化功能

aspx

     < form id = " form1 "  runat = " server " >
         < asp:ScriptManager runat = " server "  ID = " ScriptManager1 "  ScriptMode = " Debug " >
             < Services >
                 < asp:ServiceReference Path = " Services/ReturnXmlService.asmx "  InlineScript = " true "   />
             </ Services >
         </ asp:ScriptManager >
        
         < input type = " button "  value = " GetXmlDocument "  onclick = " ReturnXmlService.GetXmlDocument(onSucceeded); "   />< br  />< br  />
         < input type = " button "  value = " GetXmlElement "  onclick = " ReturnXmlService.GetXmlElement(onSucceeded); "   />< br  />< br  />
         < input type = " button "  value = " GetEmployee "  onclick = " ReturnXmlService.GetEmployee(onSucceeded); "   />< br  />< br  />
         < input type = " button "  value = " GetXmlString "  onclick = " ReturnXmlService.GetXmlString(onSucceeded); "   />< br  />< br  />
         < input type = " button "  value = " GetSerializedString "  onclick = " ReturnXmlService.GetSerializedString(onSucceeded); "   />
        
         < script language = " javascript "  type = " text/javascript " >
            function onSucceeded(result)
            {
                alert(result.xml);
            }
         </ script >
     </ form >

ReturnXmlService.asmx

<% @ WebService Language = " C# "  Class = " ReturnXmlService "   %>

using  System;
using  System.Web;
using  System.Web.Services;
using  System.Web.Services.Protocols;
using  System.Web.Script.Services;
using  System.Xml;

[WebService(Namespace  =   " http://tempuri.org/ " )]
[WebServiceBinding(ConformsTo  =  WsiProfiles.BasicProfile1_1)]
[ScriptService]
public   class  ReturnXmlService  : System.Web.Services.WebService
{    
    [WebMethod]
    [ScriptMethod(ResponseFormat  =  ResponseFormat.Xml)]
     public  XmlNode GetXmlDocument()
    {
        XmlDocument doc  =   new  XmlDocument();
        doc.LoadXml( " <Employee><Name>Jeffrey Zhao</Name><Salary>1000</Salary></Employee> " );

         return  doc;
    }

    [WebMethod]
    [ScriptMethod(ResponseFormat  =  ResponseFormat.Xml)]
     public  XmlNode GetXmlElement()
    {
        XmlDocument doc  =   new  XmlDocument();
        doc.LoadXml( " <Employee><Name>Jeffrey Zhao</Name><Salary>1000</Salary></Employee> " );

         return  doc.DocumentElement;
    }

    [WebMethod]
    [ScriptMethod(ResponseFormat  =  ResponseFormat.Xml)]
     public  Employee GetEmployee()
    {
         return   new  Employee( " Jeffrey Zhao " ,  1000 );
    }

    [WebMethod]
    [ScriptMethod(ResponseFormat  =  ResponseFormat.Xml)]
     public   string  GetXmlString()
    {
         return   " <Employee><Name>Jeffrey Zhao</Name><Salary>1000</Salary></Employee> " ;
    }

    [WebMethod]
    [ScriptMethod(ResponseFormat  =  ResponseFormat.Xml, XmlSerializeString  =   true )]
     public   string  GetSerializedString()
    {
         return   " <Employee><Name>Jeffrey Zhao</Name><Salary>1000</Salary></Employee> " ;
    }
    
}