WebService动态调用方法，VS2008也支持

调用方法，同时也支持带ref参数的

        ///   <summary>   

        ///   根据指定的信息，调用远程WebService方法   

        ///   </summary>   

        ///   <param   name="url">WebService的http形式的地址</param>   

        ///   <param   name="namespace">欲调用的WebService的命名空间</param>   

        ///   <param   name="classname">欲调用的WebService的类名（不包括命名空间前缀）</param>   

        ///   <param   name="methodname">欲调用的WebService的方法名</param>   

        ///   <param   name="args">参数列表</param>   

        ///   <returns>WebService的执行结果</returns>   

        ///   <remarks>   

        ///   如果调用失败，将会抛出Exception。请调用的时候，适当截获异常。   

        ///   异常信息可能会发生在两个地方：   

        ///   1、动态构造WebService的时候，CompileAssembly失败。   

        ///   2、WebService本身执行失败。   

        ///   </remarks>   

        ///   <example>   

        ///   <code>   

        ///   

        ///   使用方法

        ///   object [] mArgs = new object[2];

        ///   mArgs[0] = "1321321321312";

        ///   mArgs[1] = null;

        ///   object mReturn = InvokeWebservice("http://localhost:3841/Service1.asmx","WebService1","Service1","HelloWorldRef",mArgs);

        ///   </code>   

        ///   </example>   

        public static object InvokeWebservice(string url,string @namespace,string classname,string methodname,object[] args)

        {

            try

            {

                System.Net.WebClient wc = new System.Net.WebClient();

                System.IO.Stream stream = wc.OpenRead(url + "?WSDL");

                System.Web.Services.Description.ServiceDescription sd = System.Web.Services.Description.ServiceDescription.Read(stream);

                System.Web.Services.Description.ServiceDescriptionImporter sdi = new System.Web.Services.Description.ServiceDescriptionImporter();

                sdi.AddServiceDescription(sd,"","");

                System.CodeDom.CodeNamespace cn = new System.CodeDom.CodeNamespace(@namespace);

                System.CodeDom.CodeCompileUnit ccu = new System.CodeDom.CodeCompileUnit();

                ccu.Namespaces.Add(cn);

                sdi.Import(cn,ccu);



                Microsoft.CSharp.CSharpCodeProvider csc = new Microsoft.CSharp.CSharpCodeProvider();

                System.CodeDom.Compiler.ICodeCompiler icc = csc.CreateCompiler();



                System.CodeDom.Compiler.CompilerParameters cplist = new System.CodeDom.Compiler.CompilerParameters();

                cplist.GenerateExecutable = false;

                cplist.GenerateInMemory = true;

                cplist.ReferencedAssemblies.Add("System.dll");

                cplist.ReferencedAssemblies.Add("System.XML.dll");

                cplist.ReferencedAssemblies.Add("System.Web.Services.dll");

                cplist.ReferencedAssemblies.Add("System.Data.dll");



                System.CodeDom.Compiler.CompilerResults cr = icc.CompileAssemblyFromDom(cplist,ccu);

                if (true == cr.Errors.HasErrors)

                {

                    System.Text.StringBuilder sb = new System.Text.StringBuilder();

                    foreach (System.CodeDom.Compiler.CompilerError ce in cr.Errors)

                    {

                        sb.Append(ce.ToString());

                        sb.Append(System.Environment.NewLine);

                    }

                    throw new Exception(sb.ToString());

                }

                System.Reflection.Assembly assembly = cr.CompiledAssembly;

                Type t = assembly.GetType(@namespace + "." + classname,true,true);

                object obj = Activator.CreateInstance(t);

                System.Reflection.MethodInfo mi = t.getmethod(methodname);

                return mi.Invoke(obj,args);

            }

            catch (NullReferenceException NullEx)

            {

                throw NullEx;

            }

            catch (Exception Ex)

            {

                throw Ex;

            }

        }   

WebService

using System;

using System.Collections;

using System.ComponentModel;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Services;

using System.Web.Services.Protocols;

using System.Xml.Linq;



namespace WebService1

{

    /// <summary>

    /// Service1 的摘要说明

    /// </summary>

    [WebService(Namespace = "http://tempuri.org/")]

    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

    [ToolBoxItem(false)]

    // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。

    // [System.Web.Script.Services.ScriptService]

    public class Service1 : System.Web.Services.WebService

    {



        [WebMethod]

        public string HelloWorld(string pPara)

        {

            return "Hello World " + pPara;

        }



        [WebMethod]

        public string HelloWorldRef(string pPara,ref string pReturn)

        {

            pReturn = "Hello World " + pPara;



            return pReturn;

        }

    }

}