调用webservice帮助类

using System;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Configuration;
using System.IO;
using System.Linq;
using System.Net;
using System.Reflection;
using System.Text;
using System.Web.Services.Description;
using System.Xml.Serialization;

namespace DCZY.HookPlanIF
{
public class WSHelper
{
private static object _obj = new object();
private static WSHelper _ws = null;
private object _wsClassInstance = null;
private Type _wsClassType = null;

private string _nameSpace = string.Empty;
private string _className = string.Empty;
private string _wsUrl = string.Empty;

private bool _lastConn = true;
#region 事件
public event Action<bool> WsConnectionHandle;
#endregion

#region 单一实例
private WSHelper()
{
_nameSpace = ConfigurationManager.AppSettings["NameSpace"].ToString();//没什么用
_className = ConfigurationManager.AppSettings["ClassName"].ToString();//webservice名称
_wsUrl = ConfigurationManager.AppSettings["WsUrl"].ToString() + "?wsdl";//url
}

/// <summary>
/// 获取当前实例
/// </summary>
public static WSHelper CurrentInstance
{
get
{
if (_ws == null)
{
lock (_obj)
{
if (_ws == null)
{
_ws = new WSHelper();
}
}
}
return _ws;
}
}
#endregion

/// <summary>
/// 获取数据
/// </summary>
/// <param name="methodName"></param>
/// <param name="param"></param>
/// <returns></returns>
public object GetData(string methodName, object[] param)
{
try
{
if (_wsClassInstance == null || _wsClassType == null)
CreateClassInstance();

System.Reflection.MethodInfo method = _wsClassType.GetMethod(methodName);
object item = method.Invoke(_wsClassInstance, param);

if (_lastConn != true && null != WsConnectionHandle)
{
_lastConn = true;
WsConnectionHandle.BeginInvoke(false, null, null);
}
return item;
}
catch (Exception e)
{
if (_lastConn != false && null != WsConnectionHandle)
{
_lastConn = false;
WsConnectionHandle.BeginInvoke(false, null, null);
}

return null;
}
}

private void CreateClassInstance()
{
try
{
// 1. 使用 WebClient 下载 WSDL 信息。
WebClient web = new WebClient();

Stream stream = web.OpenRead(_wsUrl);
// 2. 创建和格式化 WSDL 文档。
ServiceDescription description = ServiceDescription.Read(stream);
// 3. 创建客户端代理代理类。
ServiceDescriptionImporter importer = new ServiceDescriptionImporter();
// 指定访问协议。
importer.ProtocolName = "Soap";

// 生成客户端代理。
importer.Style = ServiceDescriptionImportStyle.Client;
importer.CodeGenerationOptions = CodeGenerationOptions.GenerateProperties | CodeGenerationOptions.GenerateNewAsync;
// 添加 WSDL 文档。
importer.AddServiceDescription(description, null, null);
// 4. 使用 CodeDom 编译客户端代理类。
// 为代理类添加命名空间，缺省为全局空间。
CodeNamespace nmspace = new CodeNamespace();
CodeCompileUnit unit = new CodeCompileUnit();
unit.Namespaces.Add(nmspace);

ServiceDescriptionImportWarnings warning = importer.Import(nmspace, unit);
CodeDomProvider provider = CodeDomProvider.CreateProvider("CSharp");

CompilerParameters parameter = new CompilerParameters();
parameter.GenerateExecutable = false;
parameter.GenerateInMemory = true;
parameter.ReferencedAssemblies.Add("System.dll");
parameter.ReferencedAssemblies.Add("System.XML.dll");
parameter.ReferencedAssemblies.Add("System.Web.Services.dll");
parameter.ReferencedAssemblies.Add("System.Data.dll");

CompilerResults result = provider.CompileAssemblyFromDom(parameter, unit);

if (!result.Errors.HasErrors)
{
Assembly asm = result.CompiledAssembly;
_wsClassType = asm.GetType(_className);
_wsClassInstance = Activator.CreateInstance(_wsClassType);
}
}
catch (Exception e)
{
_wsClassInstance = null;
_wsClassType = null;
throw e;
}

}

#region IDisposable
private bool disposed;
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
private void Dispose(bool disposing)
{
if (!disposed)
{
if (disposing)
{
}
disposed = true;
}
}
~WSHelper()
{
Dispose(false);
}
#endregion
}
}