本文記錄C#中通過反射動態的呼叫帶有SoapHeader驗證的WebServices服務，基於 Windows8.1、Visual Studio 2013、IIS8 環境實現。
關於WebService建立、部署及靜態呼叫等內容，可以見：C#靜態呼叫帶有SoapHeader驗證的WebServices。

建立動態呼叫類

建立一個客戶端控制檯程式，並新建類DynamicInvokeService.cs , 檔案內容如下：

using System;
using System.Collections.Generic;
using System.Linq;
using
 
 System.Web;
using System.Net;
using System.IO;
using System.Web.Services.Description;
using System.CodeDom;
using Microsoft.CSharp;
using System.CodeDom.Compiler;
using System.Reflection;

namespace DynamicInvoke
{
    /// <summary>
    /// Web Service服務類
    /// </summary>
    public class WSHelper
    {
        ///
 
 < summary> 
        /// 動態呼叫web服務 （不含有SoapHeader）
        /// < /summary> 
        /// < param name="url">WSDL服務地址< /param> 
        /// < param name="methodname">方法名< /param> 
        /// < param name="args">引數< /param> 
        /// < returns>< /returns> 
        public
 
 static object InvokeWebService(string url, string methodname, object[] args)
        {
            return WSHelper.InvokeWebService(url, null, methodname, null, args);
        }
        /// <summary>
        /// 動態呼叫web服務（含有SoapHeader）
        /// </summary>
        /// <param name="url"></param>
        /// <param name="methodname"></param>
        /// <param name="soapHeader"></param>
        /// <param name="args"></param>
        /// <returns></returns>
        public static object InvokeWebService(string url, string methodname, SoapHeader soapHeader, object[] args)
        {
            return WSHelper.InvokeWebService(url, null, methodname, soapHeader, args);
        }
        /// < summary> 
        /// 動態呼叫web服務 
        /// < /summary> 
        /// < param name="url">WSDL服務地址< /param> 
        /// < param name="classname">類名< /param> 
        /// < param name="methodname">方法名< /param> 
        /// < param name="args">引數< /param> 
        /// < returns>< /returns> 
        public static object InvokeWebService(string url, string classname, string methodname, SoapHeader soapHeader, object[] args)
        {
            string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling";
            if ((classname == null) || (classname == ""))
            {
                classname = WSHelper.GetWsClassName(url);
            }
            try
            {
                //獲取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);

                //生成客戶端代理類程式碼 
                CodeCompileUnit ccu = new CodeCompileUnit();
                ccu.Namespaces.Add(cn);
                sdi.Import(cn, ccu);
                CSharpCodeProvider icc = new CSharpCodeProvider();

                //設定編譯引數 
                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");

                //編譯代理類 
                CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);
                if (cr.Errors.HasErrors)
                {
                    System.Text.StringBuilder sb = new System.Text.StringBuilder();
                    foreach (System.CodeDom.Compiler.CompilerError ce in cr.Errors)
                    {http://localhost:38076/Properties/
                        sb.Append(ce.ToString());
                        sb.Append(System.Environment.NewLine);
                    }
                    throw new Exception(sb.ToString());
                }

                //儲存生產的代理類，預設是儲存在bin目錄下面  
                TextWriter writer = File.CreateText("MyWebServices.cs");
                icc.GenerateCodeFromCompileUnit(ccu, writer, null);
                writer.Flush();
                writer.Close(); 

                //生成代理例項 
                System.Reflection.Assembly assembly = cr.CompiledAssembly;
                Type t = assembly.GetType(@namespace + "." + classname, true, true);
                object obj = Activator.CreateInstance(t);

                #region 設定SoapHeader
                FieldInfo client = null;
                object clientkey = null;
                if (soapHeader != null)
                {
                    client = t.GetField(soapHeader.ClassName + "Value");
                    //獲取客戶端驗證物件    soap類  
                    Type typeClient = assembly.GetType(@namespace + "." + soapHeader.ClassName);
                    //為驗證物件賦值  soap例項    
                    clientkey = Activator.CreateInstance(typeClient);
                    //遍歷屬性  
                    foreach (KeyValuePair<string, object> property in soapHeader.Properties)
                    {
                        typeClient.GetField(property.Key).SetValue(clientkey, property.Value);
                        // typeClient.GetProperty(property.Key).SetValue(clientkey, property.Value, null);  
                    }
                }
                #endregion

                if (soapHeader != null)
                {
                    //設定Soap頭  
                    client.SetValue(obj, clientkey);
                    //pro.SetValue(obj, soapHeader, null);  
                }

                //呼叫指定的方法
                System.Reflection.MethodInfo mi = t.GetMethod(methodname);
                //方法名錯誤（找不到方法），給出提示
                if (null == mi)
                {
                    return "方法名不存在，請檢查方法名是否正確！";
                }
                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];
        }

        /// <summary>  
        /// 構建SOAP頭，用於SoapHeader驗證  
        /// </summary>  
        public class SoapHeader
        {
            /// <summary>  
            /// 構造一個SOAP頭  
            /// </summary>  
            public SoapHeader()
            {
                this.Properties = new Dictionary<string, object>();
            }
            /// <summary>  
            /// 構造一個SOAP頭  
            /// </summary>  
            /// <param name="className">SOAP頭的類名</param>  
            public SoapHeader(string className)
            {
                this.ClassName = className;
                this.Properties = new Dictionary<string, object>();
            }
            /// <summary>  
            /// 構造一個SOAP頭  
            /// </summary>  
            /// <param name="className">SOAP頭的類名</param>  
            /// <param name="properties">SOAP頭的類屬性名及屬性值</param>  
            public SoapHeader(string className, Dictionary<string, object> properties)
            {
                this.ClassName = className;
                this.Properties = properties;
            }
            /// <summary>  
            /// SOAP頭的類名  
            /// </summary>  
            public string ClassName { get; set; }
            /// <summary>  
            /// SOAP頭的類屬性名及屬性值  
            /// </summary>  
            public Dictionary<string, object> Properties { get; set; }
            /// <summary>  
            /// 為SOAP頭增加一個屬性及值  
            /// </summary>  
            /// <param name="name">SOAP頭的類屬性名</param>  
            /// <param name="value">SOAP頭的類屬性值</param>  
            public void AddProperty(string name, object value)
            {
                if (this.Properties == null)
                {
                    this.Properties = new Dictionary<string, object>();
                }
                Properties.Add(name, value);
            }
        }  
    }
}

注意程式碼中有如下程式碼：

    //儲存生產的代理類，預設是儲存在bin目錄下面  
    TextWriter writer = File.CreateText("MyWebServices.cs");
    icc.GenerateCodeFromCompileUnit(ccu, writer, null);
    writer.Flush();
    writer.Close(); 

此程式碼可以儲存生成的代理類，可以在工程目錄下的bin目錄下檢視檔案。

測試端程式碼

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace DynamicInvokeService
{
    class Program
    {
        static void Main(string[] args)
        {
            string url = "http://192.168.1.109:81/WebService1.asmx";
            //string url = "http://192.168.1.109:82/WebService2.asmx";

            Dictionary<string, object> properties = new Dictionary<string, object>();
            properties.Add("UserName", "admin");
            properties.Add("PassWord", "admin123");

            DynamicInvoke.WSHelper.SoapHeader soapHeader = new DynamicInvoke.WSHelper.SoapHeader("MySoapHeader", properties);

            Object obj1 = DynamicInvoke.WSHelper.InvokeWebService(url, "HelloWorld", null);
            Object obj2 = DynamicInvoke.WSHelper.InvokeWebService(url, "HelloWorld", soapHeader, null);
            Object obj3 = DynamicInvoke.WSHelper.InvokeWebService(url, "getNum", new Object[] { 1, 2 });
            Object obj4 = DynamicInvoke.WSHelper.InvokeWebService(url, "getNum", soapHeader, new Object[] { 1, 2 });
            Object obj5 = DynamicInvoke.WSHelper.InvokeWebService(url, "getList", null);
            Object obj6 = DynamicInvoke.WSHelper.InvokeWebService(url, "getList", soapHeader, null);

            Console.WriteLine("無SoapHeader呼叫HelloWorld：" + obj1);
            Console.WriteLine("有SoapHeader呼叫HelloWorld：" + obj2);
            Console.WriteLine("無SoapHeader呼叫getNum：" + obj3);
            Console.WriteLine("有SoapHeader呼叫getNum：" + obj4);
            Console.WriteLine("無SoapHeader呼叫無驗證方法getList：" + obj5.GetType().IsArray);
            Console.WriteLine("有SoapHeader呼叫無驗證方法getList：" + obj6);

            Console.ReadKey();
        }
    }
}

執行後測試結果顯示如下：

原始碼：C#動態呼叫帶有SoapHeader驗證的WebServices