动态调用Web Service

 System.Net.WebClient wc = new System.Net.WebClient();
        System.IO.Stream stream = wc.OpenRead("http://localhost:44763/Jquery/DynamicInvoke.asmx?WSDL");
        //获取Web服务描述
        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 ns = new System.CodeDom.CodeNamespace();
        System.CodeDom.CodeCompileUnit cu = new System.CodeDom.CodeCompileUnit();
        cu.Namespaces.Add(ns);
        sdi.Import(ns, cu);//导入指定的web服务描述
        //创建csharp代码提供程序
        Microsoft.CSharp.CSharpCodeProvider provider = new Microsoft.CSharp.CSharpCodeProvider();
        //创建csharp代码编译器
        System.CodeDom.Compiler.ICodeCompiler compiler = provider.CreateCompiler();

        //调用参数设置
        System.CodeDom.Compiler.CompilerParameters parms = new System.CodeDom.Compiler.CompilerParameters();
        parms.GenerateExecutable = false;
        parms.GenerateInMemory = true;

        parms.ReferencedAssemblies.Add("System.dll");
        parms.ReferencedAssemblies.Add("System.XML.dll");
        parms.ReferencedAssemblies.Add("System.Web.Services.dll");
        parms.ReferencedAssemblies.Add("System.Data.dll");

        //生成程序集
        System.CodeDom.Compiler.CompilerResults result = provider.CompileAssemblyFromDom(parms, cu);
        if (true == result.Errors.HasErrors)
        {
 
        }

        System.Reflection.Assembly assembly = result.CompiledAssembly;
        Type t = assembly.GetType("DynamicInvoke", true, true);
        object obj = Activator.CreateInstance(t);
        System.Reflection.MethodInfo mi = t.GetMethod("HelloWorld");
        Response.Write(mi.Invoke(obj, null));