winform 客户端调用SoapExtension的方法

using System; 
using System.Web.Services; 
using System.Web.Services.Protocols; 
using System.IO; 
 
namespace SunLibrary.Web 
{ 
	/*  
	 **********服务器端配置********** 
	在WebService项目中，增加Soap扩展有两种方式，web.config配置或WebMethod配置（推荐使用WebMethod方式只扩展必要的接口） 
	 
	1.web.config配置将对所有WebMethod发生作用。！！但是，无法配置Attribute的自定义属性！！ 
	方法：增加SunLibrary.dll程序集作为引用，并且在web.config加入如下声明 
<?xml version="1.0" encoding="utf-8" ?> 
<configuration> 
	<system.web> 
		... 
		<webServices> 
			<soapExtensionTypes> 
				<add type="SunLibrary.Web.SunSoapExtension,SunLibrary" priority="1" group="0"/> 
			</soapExtensionTypes> 
		</webServices> 
		... 
	</system.web>  
</configuration> 
 
	2.WebMethod配置将对单独的WebMethod发生作用 
	方法：在WebMethod定义前加上如下属性 
	[SunLibrary.Web.SunSoapExtensionAttribute(ZipOutput=false,UnzipInput=false)] 
	 
	 **********客户端配置********** 
	在引用WebService的项目中，增加Soap扩展，方法如下： 
	增加SunLibrary.dll程序集作为引用，编辑该引用的Reference.cs文件，为代理类的每个函数增加属性： 
	[SunLibrary.Web.SunSoapExtensionAttribute(ZipOutput=false,UnzipInput=false)] 
	 
	**********补充说明********** 
	支持Soap压缩和其他特性，通过配置Attribute属性使其中的一个或多个属性生效，服务器端和客户端要成套搭配 
	*/ 
	 
	/// <summary> 
	/// Soap扩展的配置参数 
	/// </summary> 
	public struct SunSoapExtensionConfig 
	{ 
		public bool zipOutput; 
		public bool unzipInput; 
	} 
 
	/// <summary> 
	/// 提供Soap扩展的框架，派生类只需重载BeforeDeserialize/AfterDeserialize/BeforeSerialize/AfterSerialize函数完成特定处理 
	/// </summary> 
	public class SunSoapExtension : SoapExtension 
	{ 
		#region 构造函数 
		public SunSoapExtension() 
		{ 
		} 
		#endregion 
 
		#region 成员变量 
 
		/// <summary> 
		/// 定义输入输出流 
		/// </summary> 
		protected Stream networkStream,newStream; 
 
		/// <summary> 
		/// 保存配置属性 
		/// </summary> 
		protected SunSoapExtensionConfig config; 
 
		#endregion 
 
		#region 重载函数 
		public override Stream ChainStream( Stream stream ) 
		{ 
			networkStream = stream; 
			newStream = new MemoryStream(); 
			return newStream; 
		} 
 
		public override object GetInitializer(LogicalMethodInfo methodInfo,SoapExtensionAttribute attribute)  
		{ 
			return ((SunSoapExtensionAttribute)attribute).Config; 
		} 
 
		public override object GetInitializer(Type WebServiceType)  
		{ 
			return config; 
		} 
 
		public override void Initialize(object initializer)  
		{ 
			config = (SunSoapExtensionConfig)initializer; 
		} 
 
		public override void ProcessMessage(SoapMessage message)  
		{ 
			switch (message.Stage)  
			{ 
				case SoapMessageStage.BeforeSerialize: 
					BeforeSerialize( message ); 
					break; 
				case SoapMessageStage.AfterSerialize: 
					AfterSerialize( message ); 
					break; 
				case SoapMessageStage.BeforeDeserialize: 
					BeforeDeserialize( message ); 
					break; 
				case SoapMessageStage.AfterDeserialize: 
					AfterDeserialize( message ); 
					break; 
				default: 
					throw new Exception("invalid stage"); 
			} 
		} 
		#endregion 
 
		#region 需要派生类重载的虚函数（响应消息） 
		public virtual void BeforeSerialize(SoapMessage message) 
		{ 
		} 
 
		public virtual void AfterSerialize(SoapMessage message) 
		{ 
			newStream.Position = 0; 
			if (config.zipOutput) 
				api.GZipCompress(newStream,networkStream); 
			else 
				api.StreamCopy(newStream, networkStream); 
		} 
 
		public virtual void BeforeDeserialize(SoapMessage message) 
		{ 
			if (config.unzipInput) 
				api.GZipDeCompress(networkStream,newStream); 
			else 
				api.StreamCopy(networkStream, newStream); 
			newStream.Position = 0; 
		} 
		 
		public virtual void AfterDeserialize(SoapMessage message) 
		{ 
		} 
		#endregion 
	} 
 
	/// <summary> 
	/// Soap扩展的属性 
	/// </summary> 
	[AttributeUsage(AttributeTargets.Method)] 
	public class SunSoapExtensionAttribute : SoapExtensionAttribute  
	{ 
		private int priority = 1; 
		private SunSoapExtensionConfig config; 
 
		public override Type ExtensionType  
		{ 
			get { return typeof(SunSoapExtension); } 
		} 
 
		public override int Priority 
		{ 
			get { return priority; } 
			set { priority = value; } 
		} 
 
		public bool ZipOutput 
		{ 
			get { return config.zipOutput; } 
			set { config.zipOutput = value; } 
		} 
 
		public bool UnzipInput 
		{ 
			get { return config.unzipInput; } 
			set { config.unzipInput = value; } 
		} 
 
		public SunSoapExtensionConfig Config 
		{ 
			get { return config; } 
		} 
	} 
}