1、引用问题
在用C#对接webservice的时候，常用的方法是下载vs中引用webservice的地址。然后，new对应的client就可以使用了。但在，实际应用中往往会遇到webservice访问受限，比如政府单位中内网限制。因此，在开发过程中就会遇到引用问题。
解决办法：
1）使用vs自带的命令生成一个webservice类，是由webservice开发方生成的。推荐，最简单的方式。
2）使用Http请求，去拼接要发送的请求数据xml文档。
3）使用反射，反射出webservice类，得到要请求的方法，再去调用。不推荐，如果是服务端有SoapHeader验证，该方法不适用。
下面对这几种方法进行介绍。
public class WebService1 : System.Web.Services.WebService ???{ ???????public MyHeader myHeader = new MyHeader(); ???????[SoapHeader("myHeader")] ???????[WebMethod] ???????public string HelloWorld(string name, string pwd) ???????{ ???????????if (myHeader.key != "12") ???????????{ ???????????????return JsonConvert.SerializeObject(new { MsgId = 1, Msg = "用户验证成功" }); ???????????} ???????????if (string.IsNullOrEmpty(name) || string.IsNullOrEmpty(pwd)) ???????????{ ???????????????return JsonConvert.SerializeObject(new { MsgId = 0, Msg = "用户名或密码不能为空" }); ???????????} ???????????if (name.Equals("admin") && pwd.Equals("admin")) ???????????{ ???????????????return JsonConvert.SerializeObject(new { UserName = name, XueYuan = "外语学院", ZhuanYe = "英语专业", Email = "123456@qq.com", Phone = "12345678901", MsgId = 1, Msg = "获取成功" }); ???????????} ???????????return JsonConvert.SerializeObject(new { MsgId = 0, Msg = "用户名或密码错误" }); ???????} ???} ???public class MyHeader : SoapHeader ???{ ???????public string key { get; set; } ???????public string token { get; set; } ???}2、服务端生成类方式
命令：wsdl.exe /out:D:/Proxy.cs /order http://localhost:2178/Services.asmx
把这个命令复制到vs的自带命令行中生成一个类文件。把这个类文件，发给要调用webservice方。调用方，引用Proxy.cs文件，接着就可以使用了。代码如下：
WebService1 webService1 = new WebService1(); ???????????MyHeader myHeader = new MyHeader(); ???????????myHeader.key = "12"; ???????????webService1.MyHeaderValue = myHeader; ???????????Response.Write(webService1.HelloWorld("ad","ad"));3、Http请求方式
拼接要发送的数据。如下是有SoapHeader和无SoapHeader的数据模板。
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:tem="http://tempuri.org/"> ??<soapenv:Header/> ??<soapenv:Body> ?????<tem:HelloWorld> ????????<!--Optional:--> ????????<tem:name>?</tem:name> ????????<!--Optional:--> ????????<tem:pwd>?</tem:pwd> ?????</tem:HelloWorld> ??</soapenv:Body></soapenv:Envelope><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:tem="http://tempuri.org/"> ??<soapenv:Header> ?????<tem:MySoapHeader> ????????<!--Optional:--> ????????<tem:IN_WSKEY>?</tem:IN_WSKEY> ????????<!--Optional:--> ????????<tem:IN_TOKEN>?</tem:IN_TOKEN> ?????</tem:MySoapHeader> ??</soapenv:Header> ??<soapenv:Body> ?????<tem:GetReaderInfo> ????????<!--Optional:--> ????????<tem:certNo>?</tem:certNo> ????????<!--Optional:--> ????????<tem:password>?</tem:password> ????????<tem:certType>?</tem:certType> ?????</tem:GetReaderInfo> ??</soapenv:Body></soapenv:Envelope>
把占位符替换为对应的数据就可以了。HttpHelper是发送Http请求的工具类。不同的开发语言开发的webservice，对应的要发送的数据可能不太一样，原理是一样的就是发送http的请求。具体数据，可以通过Soap UI接口调试工具查看。
StringBuilder param = new StringBuilder(); ???????????param.Append("<soapenv:Envelope xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:tem=\"http://tempuri.org/\">"); ???????????param.Append(" <soapenv:Header><tem:Muse65WSSoapHeader><tem:IN_WSKEY>HxxxxG</tem:IN_WSKEY><tem:IN_TOKEN>6A1FCE13565B7BC4</tem:IN_TOKEN></tem:Muse65WSSoapHeader></soapenv:Header>"); ???????????param.Append( ???????????????"<soapenv:Body><tem:GetReaderInfo><tem:certNo>5807151617</tem:certNo><tem:password>151617</tem:password><tem:certType>2</tem:certType></tem:GetReaderInfo></soapenv:Body>"); ???????????param.Append("</soapenv:Envelope>"); ???????????HttpHelper httpHelper = new HttpHelper(); ???????????httpHelper.SetContentType("text/xml;charset=UTF-8"); ???????????httpHelper.SetEncoding(Encoding.UTF8); ???????????string str = httpHelper.HttpPost(url, param.ToString()); ???????????string res = ""; ???????????using (StringReader stringReader = new StringReader(str.Trim())) ???????????{ ???????????????using (XmlReader xmlReader = XmlReader.Create(stringReader)) ???????????????{ ???????????????????while (xmlReader.Read()) ???????????????????{ ???????????????????????if (xmlReader.NodeType == XmlNodeType.Element) ???????????????????????{ ???????????????????????????switch (xmlReader.Name.Trim()) ???????????????????????????{ ???????????????????????????????case "GetReaderInfoResult": ???????????????????????????????????if (xmlReader.Read()) ???????????????????????????????????{ ???????????????????????????????????????res = xmlReader.Value.Trim(); ???????????????????????????????????} ???????????????????????????????????break; ???????????????????????????????????????????????????????????????default: ???????????????????????????????????break; ???????????????????????????} ???????????????????????} ???????????????????} ???????????????} ???????????}4、使用反射
不推荐，并且在使用了SoapHeader的webservice中，这种没找到解决办法，不知道怎么传SoapHeader的值。
具体参考：http://www.cnblogs.com/langhua/p/3344784.html
/// < summary> ???????/// 动态调用web服务 ???????/// < /summary> ???????/// < param name="url">WSDL服务地址< /param> ???????/// < param name="classname">类名< /param> ???????/// < param name="methodname">方法名< /param> ????????/// < param name="args">参数< /param> ????????/// < returns>< /returns> ????????public object InvokeWebService(string url, string classname, string methodname, object[] args) ???????{ ???????????string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling"; ???????????if ((classname == null) || (classname == "")) ???????????{ ???????????????classname = CommonServiceHelper.GetWsClassName(url); ???????????} ???????????try ???????????{ ???????????????//获取WSDL ????????????????WebClient wc = new WebClient(); ???????????????Stream stream = wc.OpenRead(url + "?WSDL"); ???????????????ServiceDescription sd = ServiceDescription.Read(stream); ???????????????ServiceDescriptionImporter sdi = new ServiceDescriptionImporter(); ???????????????sdi.AddServiceDescription(sd, "", ""); ???????????????CodeNamespace cn = new CodeNamespace(@namespace); ???????????????//生成客户端代理类代码 ???????????????CodeCompileUnit ccu = new CodeCompileUnit(); ???????????????ccu.Namespaces.Add(cn); ???????????????sdi.Import(cn, ccu); ???????????????CSharpCodeProvider icc = new CSharpCodeProvider(); ???????????????//设定编译参数 ???????????????CompilerParameters cplist = new 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"); ???????????????//编译代理类 ????????????????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()); ???????????????} ???????????????//生成代理实例，并调用方法 ?????????????????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); ???????????????/* ????????????????????????* PropertyInfo propertyInfo = type.GetProperty(propertyname); ?????????????????????* return propertyInfo.GetValue(obj, null); ??????????????????????* */ ???????????} ???????????catch (Exception ex) ???????????{ ???????????????throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace)); ???????????} ???????} ???????private static string GetWsClassName(string wsUrl) ???????{ ???????????string[] parts = wsUrl.Split(‘/‘); ???????????string[] pps = parts[parts.Length - 1].Split(‘.‘); ???????????return pps[0]; ???????}WebService-问题
原文地址：http://www.cnblogs.com/zhaoyihao/p/7498415.html