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    深入.net调用webservice的总结分析
    最近做一个项目,由于是在别人框架里开发app,导致了很多限制,其中一个就是不能直接引用webservice 。
    我们都知道,调用webserivice 最简单的方法就是在 "引用"  那里点击右键,然后选择"引用web服务",再输入服务地址。
    确定后,会生成一个app.config 里面就会自动生成了一些配置信息。
    现在正在做的这个项目就不能这么干。后来经过一番搜索,就找出另外几种动态调用webservice 的方法。
    废话少说,下面是webservice 代码
    复制代码 代码如下:

    View Code
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using System.Web.Services;
    namespace TestWebService
    {
        /// summary>
        /// Service1 的摘要说明
        /// /summary>
        [WebService(Namespace = "http://tempuri.org/",Description="我的Web服务")]
        [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
        [System.ComponentModel.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 TestWebService : System.Web.Services.WebService
        {
            [WebMethod]
            public string HelloWorld()
            {
                return "测试Hello World";
            }
            [WebMethod]
            public string Test()
            {
                return "测试Test";
            }

            [WebMethod(CacheDuration = 60,Description = "测试")]
            public ListString> GetPersons()
            {
                ListString> list = new Liststring>();
                list.Add("测试一");
                list.Add("测试二");
                list.Add("测试三");
                return list;
            } 
        }
    }

    动态调用示例:
    方法一:
    看到很多动态调用WebService都只是动态调用地址而已,下面发一个不光是根据地址调用,方法名也可以自己指定的,主要原理是根据指定的WebService地址的WSDL,然后解析模拟生成一个代理类,通过反射调用里面的方法
    复制代码 代码如下:

    View Code
    using System;
    using System.IO;
    using System.Collections.Generic;
    using System.Linq;
    using System.Collections;
    using System.Web;
    using System.Net;
    using System.Reflection;
    using System.CodeDom;
    using System.CodeDom.Compiler;
    using System.Web.Services;
    using System.Text;
    using System.Web.Services.Description;
    using System.Web.Services.Protocols;
    using System.Xml.Serialization;
    using System.Windows.Forms;
    namespace ConsoleApplication1
    {
        class Program
        {
            static void Main(string[] args)
            {
                WebClient client = new WebClient();
                String url = "http://localhost:3182/Service1.asmx?WSDL";//这个地址可以写在Config文件里面,这里取出来就行了.在原地址后面加上: ?WSDL
                Stream stream = client.OpenRead(url);
                ServiceDescription description = ServiceDescription.Read(stream);
                ServiceDescriptionImporter importer = new ServiceDescriptionImporter();//创建客户端代理代理类。
                importer.ProtocolName = "Soap"; //指定访问协议。
                importer.Style = ServiceDescriptionImportStyle.Client; //生成客户端代理。
                importer.CodeGenerationOptions = CodeGenerationOptions.GenerateProperties | CodeGenerationOptions.GenerateNewAsync;
                importer.AddServiceDescription(description, null, null); //添加WSDL文档。
                CodeNamespace nmspace = new CodeNamespace(); //命名空间
                nmspace.Name = "TestWebService";
                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.OutputAssembly = "MyTest.dll";//输出程序集的名称
                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)
                {
                    // 显示编译错误信息
                }
                Assembly asm = Assembly.LoadFrom("MyTest.dll");//加载前面生成的程序集
                Type t = asm.GetType("TestWebService.TestWebService");
                object o = Activator.CreateInstance(t);
                MethodInfo method = t.GetMethod("GetPersons");//GetPersons是服务端的方法名称,你想调用服务端的什么方法都可以在这里改,最好封装一下
                String[] item = (String[])method.Invoke(o, null);
                //注:method.Invoke(o, null)返回的是一个Object,如果你服务端返回的是DataSet,这里也是用(DataSet)method.Invoke(o, null)转一下就行了,method.Invoke(0,null)这里的null可以传调用方法需要的参数,string[]形式的
                foreach (string str in item)
                    Console.WriteLine(str);
                //上面是根据WebService地址,模似生成一个代理类,如果你想看看生成的代码文件是什么样子,可以用以下代码保存下来,默认是保存在bin目录下面
                TextWriter writer = File.CreateText("MyTest.cs");
                provider.GenerateCodeFromCompileUnit(unit, writer, null);
                writer.Flush();
                writer.Close();
            }
        }
    }

    方法二:利用 wsdl.exe生成webservice代理类:
    根据提供的wsdl生成webservice代理类,然后在代码里引用这个类文件。
    步骤:
    1、在开始菜单找到  Microsoft Visual Studio 2010 下面的Visual Studio Tools , 点击Visual Studio 命令提示(2010),打开命令行。
    2、 在命令行中输入:  wsdl /language:c# /n:TestDemo /out:d:/Temp/TestService.cs http://jm1.services.gmcc.net/ad/Services/AD.asmx?wsdl
    这句命令行的意思是:对最后面的服务地址进行编译,在D盘temp 目录下生成testservice文件。
    3、 把上面命令编译后的cs文件,复制到我们项目中,在项目代码中可以直接new 一个出来后,可以进行调用。
    贴出由命令行编译出来的代码:
    复制代码 代码如下:

    View Code
    //------------------------------------------------------------------------------
    // auto-generated>
    //     此代码由工具生成。
    //     运行时版本:4.0.30319.225
    //
    //     对此文件的更改可能会导致不正确的行为,并且如果
    //     重新生成代码,这些更改将会丢失。
    // /auto-generated>
    //------------------------------------------------------------------------------
    //
    // 此源代码由 wsdl 自动生成, Version=4.0.30319.1。
    //
    namespace Bingosoft.Module.SurveyQuestionnaire.DAL {
        using System;
        using System.Diagnostics;
        using System.Xml.Serialization;
        using System.ComponentModel;
        using System.Web.Services.Protocols;
        using System.Web.Services;
        using System.Data;

       
        /// remarks/>
        [System.CodeDom.Compiler.GeneratedCodeAttribute("wsdl", "4.0.30319.1")]
        [System.Diagnostics.DebuggerStepThroughAttribute()]
        [System.ComponentModel.DesignerCategoryAttribute("code")]
        [System.Web.Services.WebServiceBindingAttribute(Name="WebserviceForILookSoap", Namespace="http://tempuri.org/")]
        public partial class WebserviceForILook : System.Web.Services.Protocols.SoapHttpClientProtocol {

            private System.Threading.SendOrPostCallback GetRecordNumOperationCompleted;

            private System.Threading.SendOrPostCallback GetVoteListOperationCompleted;

            private System.Threading.SendOrPostCallback VoteOperationCompleted;

            private System.Threading.SendOrPostCallback GiveUpOperationCompleted;

            private System.Threading.SendOrPostCallback GetQuestionTaskListOperationCompleted;

            /// remarks/>
            public WebserviceForILook() {
                this.Url = "http://st1.services.gmcc.net/qnaire/Services/WebserviceForILook.asmx";
            }

            /// remarks/>
            public event GetRecordNumCompletedEventHandler GetRecordNumCompleted;

            /// remarks/>
            public event GetVoteListCompletedEventHandler GetVoteListCompleted;

            /// remarks/>
            public event VoteCompletedEventHandler VoteCompleted;

            /// remarks/>
            public event GiveUpCompletedEventHandler GiveUpCompleted;

            /// remarks/>
            public event GetQuestionTaskListCompletedEventHandler GetQuestionTaskListCompleted;

            /// remarks/>
            [System.Web.Services.Protocols.SoapDocumentMethodAttribute("http://tempuri.org/GetRecordNum", RequestNamespace="http://tempuri.org/", ResponseNamespace="http://tempuri.org/", Use=System.Web.Services.Description.SoapBindingUse.Literal, ParameterStyle=System.Web.Services.Protocols.SoapParameterStyle.Wrapped)]
            public int[] GetRecordNum(string appcode, string userID) {
                object[] results = this.Invoke("GetRecordNum", new object[] {
                            appcode,
                            userID});
                return ((int[])(results[0]));
            }

            /// remarks/>
            public System.IAsyncResult BeginGetRecordNum(string appcode, string userID, System.AsyncCallback callback, object asyncState) {
                return this.BeginInvoke("GetRecordNum", new object[] {
                            appcode,
                            userID}, callback, asyncState);
            }

            /// remarks/>
            public int[] EndGetRecordNum(System.IAsyncResult asyncResult) {
                object[] results = this.EndInvoke(asyncResult);
                return ((int[])(results[0]));
            }

            /// remarks/>
            public void GetRecordNumAsync(string appcode, string userID) {
                this.GetRecordNumAsync(appcode, userID, null);
            }

            /// remarks/>
            public void GetRecordNumAsync(string appcode, string userID, object userState) {
                if ((this.GetRecordNumOperationCompleted == null)) {
                    this.GetRecordNumOperationCompleted = new System.Threading.SendOrPostCallback(this.OnGetRecordNumOperationCompleted);
                }
                this.InvokeAsync("GetRecordNum", new object[] {
                            appcode,
                            userID}, this.GetRecordNumOperationCompleted, userState);
            }

            private void OnGetRecordNumOperationCompleted(object arg) {
                if ((this.GetRecordNumCompleted != null)) {
                    System.Web.Services.Protocols.InvokeCompletedEventArgs invokeArgs = ((System.Web.Services.Protocols.InvokeCompletedEventArgs)(arg));
                    this.GetRecordNumCompleted(this, new GetRecordNumCompletedEventArgs(invokeArgs.Results, invokeArgs.Error, invokeArgs.Cancelled, invokeArgs.UserState));
                }
            }

            /// remarks/>
            [System.Web.Services.Protocols.SoapDocumentMethodAttribute("http://tempuri.org/GetVoteList", RequestNamespace="http://tempuri.org/", ResponseNamespace="http://tempuri.org/", Use=System.Web.Services.Description.SoapBindingUse.Literal, ParameterStyle=System.Web.Services.Protocols.SoapParameterStyle.Wrapped)]
            public System.Data.DataSet GetVoteList(string appcode, string userID) {
                object[] results = this.Invoke("GetVoteList", new object[] {
                            appcode,
                            userID});
                return ((System.Data.DataSet)(results[0]));
            }

            /// remarks/>
            public System.IAsyncResult BeginGetVoteList(string appcode, string userID, System.AsyncCallback callback, object asyncState) {
                return this.BeginInvoke("GetVoteList", new object[] {
                            appcode,
                            userID}, callback, asyncState);
            }

            /// remarks/>
            public System.Data.DataSet EndGetVoteList(System.IAsyncResult asyncResult) {
                object[] results = this.EndInvoke(asyncResult);
                return ((System.Data.DataSet)(results[0]));
            }

            /// remarks/>
            public void GetVoteListAsync(string appcode, string userID) {
                this.GetVoteListAsync(appcode, userID, null);
            }

            /// remarks/>
            public void GetVoteListAsync(string appcode, string userID, object userState) {
                if ((this.GetVoteListOperationCompleted == null)) {
                    this.GetVoteListOperationCompleted = new System.Threading.SendOrPostCallback(this.OnGetVoteListOperationCompleted);
                }
                this.InvokeAsync("GetVoteList", new object[] {
                            appcode,
                            userID}, this.GetVoteListOperationCompleted, userState);
            }

            private void OnGetVoteListOperationCompleted(object arg) {
                if ((this.GetVoteListCompleted != null)) {
                    System.Web.Services.Protocols.InvokeCompletedEventArgs invokeArgs = ((System.Web.Services.Protocols.InvokeCompletedEventArgs)(arg));
                    this.GetVoteListCompleted(this, new GetVoteListCompletedEventArgs(invokeArgs.Results, invokeArgs.Error, invokeArgs.Cancelled, invokeArgs.UserState));
                }
            }

            /// remarks/>
            [System.Web.Services.Protocols.SoapDocumentMethodAttribute("http://tempuri.org/Vote", RequestNamespace="http://tempuri.org/", ResponseNamespace="http://tempuri.org/", Use=System.Web.Services.Description.SoapBindingUse.Literal, ParameterStyle=System.Web.Services.Protocols.SoapParameterStyle.Wrapped)]
            public bool Vote(string appcode, string userID, string qTaskID, string answer) {
                object[] results = this.Invoke("Vote", new object[] {
                            appcode,
                            userID,
                            qTaskID,
                            answer});
                return ((bool)(results[0]));
            }

            /// remarks/>
            public System.IAsyncResult BeginVote(string appcode, string userID, string qTaskID, string answer, System.AsyncCallback callback, object asyncState) {
                return this.BeginInvoke("Vote", new object[] {
                            appcode,
                            userID,
                            qTaskID,
                            answer}, callback, asyncState);
            }

            /// remarks/>
            public bool EndVote(System.IAsyncResult asyncResult) {
                object[] results = this.EndInvoke(asyncResult);
                return ((bool)(results[0]));
            }

            /// remarks/>
            public void VoteAsync(string appcode, string userID, string qTaskID, string answer) {
                this.VoteAsync(appcode, userID, qTaskID, answer, null);
            }

            /// remarks/>
            public void VoteAsync(string appcode, string userID, string qTaskID, string answer, object userState) {
                if ((this.VoteOperationCompleted == null)) {
                    this.VoteOperationCompleted = new System.Threading.SendOrPostCallback(this.OnVoteOperationCompleted);
                }
                this.InvokeAsync("Vote", new object[] {
                            appcode,
                            userID,
                            qTaskID,
                            answer}, this.VoteOperationCompleted, userState);
            }

            private void OnVoteOperationCompleted(object arg) {
                if ((this.VoteCompleted != null)) {
                    System.Web.Services.Protocols.InvokeCompletedEventArgs invokeArgs = ((System.Web.Services.Protocols.InvokeCompletedEventArgs)(arg));
                    this.VoteCompleted(this, new VoteCompletedEventArgs(invokeArgs.Results, invokeArgs.Error, invokeArgs.Cancelled, invokeArgs.UserState));
                }
            }

            /// remarks/>
            [System.Web.Services.Protocols.SoapDocumentMethodAttribute("http://tempuri.org/GiveUp", RequestNamespace="http://tempuri.org/", ResponseNamespace="http://tempuri.org/", Use=System.Web.Services.Description.SoapBindingUse.Literal, ParameterStyle=System.Web.Services.Protocols.SoapParameterStyle.Wrapped)]
            public bool GiveUp(string appcode, string userID, string qTaskID) {
                object[] results = this.Invoke("GiveUp", new object[] {
                            appcode,
                            userID,
                            qTaskID});
                return ((bool)(results[0]));
            }

            /// remarks/>
            public System.IAsyncResult BeginGiveUp(string appcode, string userID, string qTaskID, System.AsyncCallback callback, object asyncState) {
                return this.BeginInvoke("GiveUp", new object[] {
                            appcode,
                            userID,
                            qTaskID}, callback, asyncState);
            }

            /// remarks/>
            public bool EndGiveUp(System.IAsyncResult asyncResult) {
                object[] results = this.EndInvoke(asyncResult);
                return ((bool)(results[0]));
            }

            /// remarks/>
            public void GiveUpAsync(string appcode, string userID, string qTaskID) {
                this.GiveUpAsync(appcode, userID, qTaskID, null);
            }

            /// remarks/>
            public void GiveUpAsync(string appcode, string userID, string qTaskID, object userState) {
                if ((this.GiveUpOperationCompleted == null)) {
                    this.GiveUpOperationCompleted = new System.Threading.SendOrPostCallback(this.OnGiveUpOperationCompleted);
                }
                this.InvokeAsync("GiveUp", new object[] {
                            appcode,
                            userID,
                            qTaskID}, this.GiveUpOperationCompleted, userState);
            }

            private void OnGiveUpOperationCompleted(object arg) {
                if ((this.GiveUpCompleted != null)) {
                    System.Web.Services.Protocols.InvokeCompletedEventArgs invokeArgs = ((System.Web.Services.Protocols.InvokeCompletedEventArgs)(arg));
                    this.GiveUpCompleted(this, new GiveUpCompletedEventArgs(invokeArgs.Results, invokeArgs.Error, invokeArgs.Cancelled, invokeArgs.UserState));
                }
            }

            /// remarks/>
            [System.Web.Services.Protocols.SoapDocumentMethodAttribute("http://tempuri.org/GetQuestionTaskList", RequestNamespace="http://tempuri.org/", ResponseNamespace="http://tempuri.org/", Use=System.Web.Services.Description.SoapBindingUse.Literal, ParameterStyle=System.Web.Services.Protocols.SoapParameterStyle.Wrapped)]
            public System.Data.DataSet GetQuestionTaskList(string appcode, string userID) {
                object[] results = this.Invoke("GetQuestionTaskList", new object[] {
                            appcode,
                            userID});
                return ((System.Data.DataSet)(results[0]));
            }

            /// remarks/>
            public System.IAsyncResult BeginGetQuestionTaskList(string appcode, string userID, System.AsyncCallback callback, object asyncState) {
                return this.BeginInvoke("GetQuestionTaskList", new object[] {
                            appcode,
                            userID}, callback, asyncState);
            }

            /// remarks/>
            public System.Data.DataSet EndGetQuestionTaskList(System.IAsyncResult asyncResult) {
                object[] results = this.EndInvoke(asyncResult);
                return ((System.Data.DataSet)(results[0]));
            }

            /// remarks/>
            public void GetQuestionTaskListAsync(string appcode, string userID) {
                this.GetQuestionTaskListAsync(appcode, userID, null);
            }

            /// remarks/>
            public void GetQuestionTaskListAsync(string appcode, string userID, object userState) {
                if ((this.GetQuestionTaskListOperationCompleted == null)) {
                    this.GetQuestionTaskListOperationCompleted = new System.Threading.SendOrPostCallback(this.OnGetQuestionTaskListOperationCompleted);
                }
                this.InvokeAsync("GetQuestionTaskList", new object[] {
                            appcode,
                            userID}, this.GetQuestionTaskListOperationCompleted, userState);
            }

            private void OnGetQuestionTaskListOperationCompleted(object arg) {
                if ((this.GetQuestionTaskListCompleted != null)) {
                    System.Web.Services.Protocols.InvokeCompletedEventArgs invokeArgs = ((System.Web.Services.Protocols.InvokeCompletedEventArgs)(arg));
                    this.GetQuestionTaskListCompleted(this, new GetQuestionTaskListCompletedEventArgs(invokeArgs.Results, invokeArgs.Error, invokeArgs.Cancelled, invokeArgs.UserState));
                }
            }

            /// remarks/>
            public new void CancelAsync(object userState) {
                base.CancelAsync(userState);
            }
        }

        /// remarks/>
        [System.CodeDom.Compiler.GeneratedCodeAttribute("wsdl", "4.0.30319.1")]
        public delegate void GetRecordNumCompletedEventHandler(object sender, GetRecordNumCompletedEventArgs e);

        /// remarks/>
        [System.CodeDom.Compiler.GeneratedCodeAttribute("wsdl", "4.0.30319.1")]
        [System.Diagnostics.DebuggerStepThroughAttribute()]
        [System.ComponentModel.DesignerCategoryAttribute("code")]
        public partial class GetRecordNumCompletedEventArgs : System.ComponentModel.AsyncCompletedEventArgs {

            private object[] results;

            internal GetRecordNumCompletedEventArgs(object[] results, System.Exception exception, bool cancelled, object userState) :
                    base(exception, cancelled, userState) {
                this.results = results;
            }

            /// remarks/>
            public int[] Result {
                get {
                    this.RaiseExceptionIfNecessary();
                    return ((int[])(this.results[0]));
                }
            }
        }

        /// remarks/>
        [System.CodeDom.Compiler.GeneratedCodeAttribute("wsdl", "4.0.30319.1")]
        public delegate void GetVoteListCompletedEventHandler(object sender, GetVoteListCompletedEventArgs e);

        /// remarks/>
        [System.CodeDom.Compiler.GeneratedCodeAttribute("wsdl", "4.0.30319.1")]
        [System.Diagnostics.DebuggerStepThroughAttribute()]
        [System.ComponentModel.DesignerCategoryAttribute("code")]
        public partial class GetVoteListCompletedEventArgs : System.ComponentModel.AsyncCompletedEventArgs {

            private object[] results;

            internal GetVoteListCompletedEventArgs(object[] results, System.Exception exception, bool cancelled, object userState) :
                    base(exception, cancelled, userState) {
                this.results = results;
            }

            /// remarks/>
            public System.Data.DataSet Result {
                get {
                    this.RaiseExceptionIfNecessary();
                    return ((System.Data.DataSet)(this.results[0]));
                }
            }
        }

        /// remarks/>
        [System.CodeDom.Compiler.GeneratedCodeAttribute("wsdl", "4.0.30319.1")]
        public delegate void VoteCompletedEventHandler(object sender, VoteCompletedEventArgs e);

        /// remarks/>
        [System.CodeDom.Compiler.GeneratedCodeAttribute("wsdl", "4.0.30319.1")]
        [System.Diagnostics.DebuggerStepThroughAttribute()]
        [System.ComponentModel.DesignerCategoryAttribute("code")]
        public partial class VoteCompletedEventArgs : System.ComponentModel.AsyncCompletedEventArgs {

            private object[] results;

            internal VoteCompletedEventArgs(object[] results, System.Exception exception, bool cancelled, object userState) :
                    base(exception, cancelled, userState) {
                this.results = results;
            }

            /// remarks/>
            public bool Result {
                get {
                    this.RaiseExceptionIfNecessary();
                    return ((bool)(this.results[0]));
                }
            }
        }

        /// remarks/>
        [System.CodeDom.Compiler.GeneratedCodeAttribute("wsdl", "4.0.30319.1")]
        public delegate void GiveUpCompletedEventHandler(object sender, GiveUpCompletedEventArgs e);

        /// remarks/>
        [System.CodeDom.Compiler.GeneratedCodeAttribute("wsdl", "4.0.30319.1")]
        [System.Diagnostics.DebuggerStepThroughAttribute()]
        [System.ComponentModel.DesignerCategoryAttribute("code")]
        public partial class GiveUpCompletedEventArgs : System.ComponentModel.AsyncCompletedEventArgs {

            private object[] results;

            internal GiveUpCompletedEventArgs(object[] results, System.Exception exception, bool cancelled, object userState) :
                    base(exception, cancelled, userState) {
                this.results = results;
            }

            /// remarks/>
            public bool Result {
                get {
                    this.RaiseExceptionIfNecessary();
                    return ((bool)(this.results[0]));
                }
            }
        }

        /// remarks/>
        [System.CodeDom.Compiler.GeneratedCodeAttribute("wsdl", "4.0.30319.1")]
        public delegate void GetQuestionTaskListCompletedEventHandler(object sender, GetQuestionTaskListCompletedEventArgs e);

        /// remarks/>
        [System.CodeDom.Compiler.GeneratedCodeAttribute("wsdl", "4.0.30319.1")]
        [System.Diagnostics.DebuggerStepThroughAttribute()]
        [System.ComponentModel.DesignerCategoryAttribute("code")]
        public partial class GetQuestionTaskListCompletedEventArgs : System.ComponentModel.AsyncCompletedEventArgs {

            private object[] results;

            internal GetQuestionTaskListCompletedEventArgs(object[] results, System.Exception exception, bool cancelled, object userState) :
                    base(exception, cancelled, userState) {
                this.results = results;
            }

            /// remarks/>
            public System.Data.DataSet Result {
                get {
                    this.RaiseExceptionIfNecessary();
                    return ((System.Data.DataSet)(this.results[0]));
                }
            }
        }
    }

    方法三:利用http 协议的get和post
    这是最为灵活的方法。
    复制代码 代码如下:

    View Code
    using System;
    using System.Collections;
    using System.IO;
    using System.Net;
    using System.Text;
    using System.Xml;
    using System.Xml.Serialization;
    namespace Bingosoft.RIA.Common
    {
        /// summary>
        ///  利用WebRequest/WebResponse进行WebService调用的类
        /// /summary>
        public class WebServiceCaller
        {
            #region Tip:使用说明
            //webServices 应该支持Get和Post调用,在web.config应该增加以下代码
            //webServices>
            //  protocols>
            //    add name="HttpGet"/>
            //    add name="HttpPost"/>
            //  /protocols>
            ///webServices>
            //调用示例:
            //Hashtable ht = new Hashtable();  //Hashtable 为webservice所需要的参数集
            //ht.Add("str", "test");
            //ht.Add("b", "true");
            //XmlDocument xx = WebSvcCaller.QuerySoapWebService("http://localhost:81/service.asmx", "HelloWorld", ht);
            //MessageBox.Show(xx.OuterXml);
            #endregion
            /// summary>
            /// 需要WebService支持Post调用
            /// /summary>
            public static XmlDocument QueryPostWebService(String URL, String MethodName, Hashtable Pars)
            {
                HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL + "/" + MethodName);
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                SetWebRequest(request);
                byte[] data = EncodePars(Pars);
                WriteRequestData(request, data);
                return ReadXmlResponse(request.GetResponse());
            }
            /// summary>
            /// 需要WebService支持Get调用
            /// /summary>
            public static XmlDocument QueryGetWebService(String URL, String MethodName, Hashtable Pars)
            {
                HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL + "/" + MethodName + "?" + ParsToString(Pars));
                request.Method = "GET";
                request.ContentType = "application/x-www-form-urlencoded";
                SetWebRequest(request);
                return ReadXmlResponse(request.GetResponse());
            }
            /// summary>
            /// 通用WebService调用(Soap),参数Pars为String类型的参数名、参数值
            /// /summary>
            public static XmlDocument QuerySoapWebService(String URL, String MethodName, Hashtable Pars)
            {
                if (_xmlNamespaces.ContainsKey(URL))
                {
                    return QuerySoapWebService(URL, MethodName, Pars, _xmlNamespaces[URL].ToString());
                }
                else
                {
                    return QuerySoapWebService(URL, MethodName, Pars, GetNamespace(URL));
                }
            }
            private static XmlDocument QuerySoapWebService(String URL, String MethodName, Hashtable Pars, string XmlNs)
            {
                _xmlNamespaces[URL] = XmlNs;//加入缓存,提高效率
                HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL);
                request.Method = "POST";
                request.ContentType = "text/xml; charset=utf-8";
                request.Headers.Add("SOAPAction", "\"" + XmlNs + (XmlNs.EndsWith("/") ? "" : "/") + MethodName + "\"");
                SetWebRequest(request);
                byte[] data = EncodeParsToSoap(Pars, XmlNs, MethodName);
                WriteRequestData(request, data);
                XmlDocument doc = new XmlDocument(), doc2 = new XmlDocument();
                doc = ReadXmlResponse(request.GetResponse());
                XmlNamespaceManager mgr = new XmlNamespaceManager(doc.NameTable);
                mgr.AddNamespace("soap", "http://schemas.xmlsoap.org/soap/envelope/");
                String RetXml = doc.SelectSingleNode("//soap:Body/*/*", mgr).InnerXml;
                doc2.LoadXml("root>" + RetXml + "/root>");
                AddDelaration(doc2);
                return doc2;
            }
            private static string GetNamespace(String URL)
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL + "?WSDL");
                SetWebRequest(request);
                WebResponse response = request.GetResponse();
                StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                XmlDocument doc = new XmlDocument();
                doc.LoadXml(sr.ReadToEnd());
                sr.Close();
                return doc.SelectSingleNode("//@targetNamespace").Value;
            }
            private static byte[] EncodeParsToSoap(Hashtable Pars, String XmlNs, String MethodName)
            {
                XmlDocument doc = new XmlDocument();
                doc.LoadXml("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:Envelope>");
                AddDelaration(doc);
                //XmlElement soapBody = doc.createElement_x_x("soap", "Body", "http://schemas.xmlsoap.org/soap/envelope/");
                XmlElement soapBody = doc.CreateElement("soap", "Body", "http://schemas.xmlsoap.org/soap/envelope/");
                //XmlElement soapMethod = doc.createElement_x_x(MethodName);
                XmlElement soapMethod = doc.CreateElement(MethodName);
                soapMethod.SetAttribute("xmlns", XmlNs);
                foreach (string k in Pars.Keys)
                {
                    //XmlElement soapPar = doc.createElement_x_x(k);
                    XmlElement soapPar = doc.CreateElement(k);
                    soapPar.InnerXml = ObjectToSoapXml(Pars[k]);
                    soapMethod.AppendChild(soapPar);
                }
                soapBody.AppendChild(soapMethod);
                doc.DocumentElement.AppendChild(soapBody);
                return Encoding.UTF8.GetBytes(doc.OuterXml);
            }
            private static string ObjectToSoapXml(object o)
            {
                XmlSerializer mySerializer = new XmlSerializer(o.GetType());
                MemoryStream ms = new MemoryStream();
                mySerializer.Serialize(ms, o);
                XmlDocument doc = new XmlDocument();
                doc.LoadXml(Encoding.UTF8.GetString(ms.ToArray()));
                if (doc.DocumentElement != null)
                {
                    return doc.DocumentElement.InnerXml;
                }
                else
                {
                    return o.ToString();
                }
            }
            /// summary>
            /// 设置凭证与超时时间
            /// /summary>
            /// param name="request">/param>
            private static void SetWebRequest(HttpWebRequest request)
            {
                request.Credentials = CredentialCache.DefaultCredentials;
                request.Timeout = 10000;
            }
            private static void WriteRequestData(HttpWebRequest request, byte[] data)
            {
                request.ContentLength = data.Length;
                Stream writer = request.GetRequestStream();
                writer.Write(data, 0, data.Length);
                writer.Close();
            }
            private static byte[] EncodePars(Hashtable Pars)
            {
                return Encoding.UTF8.GetBytes(ParsToString(Pars));
            }
            private static String ParsToString(Hashtable Pars)
            {
                StringBuilder sb = new StringBuilder();
                foreach (string k in Pars.Keys)
                {
                    if (sb.Length > 0)
                    {
                        sb.Append("");
                    }
                    //sb.Append(HttpUtility.UrlEncode(k) + "=" + HttpUtility.UrlEncode(Pars[k].ToString()));
                }
                return sb.ToString();
            }
            private static XmlDocument ReadXmlResponse(WebResponse response)
            {
                StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                String retXml = sr.ReadToEnd();
                sr.Close();
                XmlDocument doc = new XmlDocument();
                doc.LoadXml(retXml);
                return doc;
            }
            private static void AddDelaration(XmlDocument doc)
            {
                XmlDeclaration decl = doc.CreateXmlDeclaration("1.0", "utf-8", null);
                doc.InsertBefore(decl, doc.DocumentElement);
            }
            private static Hashtable _xmlNamespaces = new Hashtable();//缓存xmlNamespace,避免重复调用GetNamespace
        }
    }

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