C.Net dynamic call webService implementation ideas and code

 
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 HTTPS 
{ 
public class WSHelper 
{ 
/// < summary> 
///  The dynamic invocation web service  
/// < /summary> 
/// < param name="url">WSDL Service address < /param> 
/// < param name="methodname"> The method name < /param> 
/// < param name="args"> parameter < /param> 
/// < returns>< /returns> 
public static object InvokeWebService(string url, string methodname, object[] args) 
{ 
return WSHelper.InvokeWebService(url, null, methodname, args); 
} 
/// < summary> 
///  The dynamic invocation web service  
/// < /summary> 
/// < param name="url">WSDL Service address < /param> 
/// < param name="classname"> The name of the class < /param> 
/// < param name="methodname"> The method name < /param> 
/// < param name="args"> parameter < /param> 
/// < returns>< /returns> 
public static object InvokeWebService(string url, string classname, string methodname, object[] args) 
{ 
string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling"; 
if ((classname == null) || (classname == "")) 
{ 
classname = WSHelper.GetWsClassName(url); 
} 
try 
{ // To obtain 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); 
// Generate the client proxy class code  
CodeCompileUnit ccu = new CodeCompileUnit(); 
ccu.Namespaces.Add(cn); 
sdi.Import(cn, ccu); 
CSharpCodeProvider icc = new CSharpCodeProvider(); 
// Set compilation parameters  
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"); 
// Compile proxy class  
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()); 
} 
// Generate the proxy instance and invoke the method  
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]; 
} 
} 
} 

 
string url = "http://webservice.webxml.com.cn/WebServices/TrainTimeWebService.asmx"; 
string[] args = new string[2]; 
args[0] = "k123"; 
args[1] = ""; 
object result = WSHelper.InvokeWebService(url, "getDetailInfoByTrainCode", args); 
DataSet ds = (DataSet)result; 
this.GridView1.DataSource = ds; 
this.GridView1.DataBind();