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  • 远程WebService方法

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Net;
    using System.IO;
    using System.CodeDom;
    using Microsoft.CSharp;
    using System.CodeDom.Compiler;
    using System.Reflection;
    
    namespace Dct.DuplexServices.Services
    {
        internal class WebServiceHelper
        {
            /// <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>
            /// object obj = InvokeWebservice("http://localhost/test.asmx",
            ///                               "dct",
            ///                               "Common",
            ///                               "GetToolType",
            ///                               new object[]{"1"});
            /// </code>
            /// </example>
            public static object InvokeWebservice(string url, string @namespace, string classname,
                                                  string methodname, object[] args)
            {
                try
                {
                    WebClient wc = new WebClient();
                    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, "", "");
                    CodeNamespace cn = new CodeNamespace(@namespace);
                    CodeCompileUnit ccu = new CodeCompileUnit();
                    ccu.Namespaces.Add(cn);
                    sdi.Import(cn, ccu);
    
                    CSharpCodeProvider csc = new CSharpCodeProvider();
                    ICodeCompiler icc = csc.CreateCompiler();
    
                    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");
    
                    CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);
                    if (true == cr.Errors.HasErrors)
                    {
                        StringBuilder sb = new StringBuilder();
                        foreach (CompilerError ce in cr.Errors)
                        {
                            sb.Append(ce.ToString());
                            sb.Append(System.Environment.NewLine);
                        }
                        throw new Exception(sb.ToString());
                    }
                    Assembly assembly = cr.CompiledAssembly;
                    Type t = assembly.GetType(@namespace + "." + classname, true, true);
                    object obj = Activator.CreateInstance(t);
                    MethodInfo mi = t.GetMethod(methodname);
                    return mi.Invoke(obj, args);
                }
                catch (Exception ex)
                {
                    throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace));
                }
            }
        }
    }
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  • 原文地址:https://www.cnblogs.com/topcoder/p/2839908.html
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