动态调用WebService

1private object InvokeWebservice(string url, string @namespace, string classname, string methodname, object[] args)
22{
23 try
24 {
25 System.Net.WebClient wc = new System.Net.WebClient();
26 System.IO.Stream stream = wc.OpenRead(url + "?WSDL");
27 System.Web.Services.Description.ServiceDescription sd = System.Web.Services.Description.ServiceDescription.Read(stream);
28 System.Web.Services.Description.ServiceDescriptionImporter sdi = new System.Web.Services.Description.ServiceDescriptionImporter();
29 sdi.AddServiceDescription(sd, "", "");
30 System.CodeDom.CodeNamespace cn = new System.CodeDom.CodeNamespace(@namespace);
31 System.CodeDom.CodeCompileUnit ccu = new System.CodeDom.CodeCompileUnit();
32 ccu.Namespaces.Add(cn);
33 sdi.Import(cn, ccu);
34
35 Microsoft.CSharp.CSharpCodeProvider csc = new Microsoft.CSharp.CSharpCodeProvider();
36 System.CodeDom.Compiler.ICodeCompiler icc = csc.CreateCompiler();
37 System.CodeDom.Compiler.CompilerParameters cplist = new System.CodeDom.Compiler.CompilerParameters();
38 cplist.GenerateExecutable = false;
39 cplist.GenerateInMemory = true;
40 cplist.ReferencedAssemblies.Add("System.dll");
41 cplist.ReferencedAssemblies.Add("System.XML.dll");
42 cplist.ReferencedAssemblies.Add("System.Web.Services.dll");
43 cplist.ReferencedAssemblies.Add("System.Data.dll");
44
45 System.CodeDom.Compiler.CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);
46 if (true == cr.Errors.HasErrors)
47 {
48 System.Text.StringBuilder sb = new StringBuilder();
49 foreach (System.CodeDom.Compiler.CompilerError ce in cr.Errors)
50 {
51 sb.Append(ce.ToString());
52 sb.Append(System.Environment.NewLine);
53 }
54 throw new Exception(sb.ToString());
55 }
56
57 System.Reflection.Assembly assembly = cr.CompiledAssembly;
58 Type t = assembly.GetType(@namespace + "." + classname, true, true);
59 object obj = Activator.CreateInstance(t);
60 System.Reflection.MethodInfo mi = t.GetMethod(methodname);
61 return mi.Invoke(obj, args);
62 }
63 catch(Exception ex)
64 {
65 throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace));
66 }
67}