C# .Net动态调用webService

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>
/// 动态调用web服务
/// < /summary>
/// < param name="url">WSDL服务地址< /param>
/// < param name="methodname">方法名< /param>
/// < param name="args">参数< /param>
/// < returns>< /returns>
public static object InvokeWebService(string url, string methodname, object[] args)
{
return WSHelper.InvokeWebService(url, null, methodname, args);
}
/// < summary>
/// 动态调用web服务
/// < /summary>
/// < param name="url">WSDL服务地址< /param>
/// < param name="classname">类名< /param>
/// < param name="methodname">方法名< /param>
/// < param name="args">参数< /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
{                   //获取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);
//生成客户端代理类代码
CodeCompileUnit ccu = new CodeCompileUnit();
ccu.Namespaces.Add(cn);
sdi.Import(cn, ccu);
CSharpCodeProvider icc = new CSharpCodeProvider();
//设定编译参数
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");
//编译代理类
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());
}
//生成代理实例，并调用方法
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];
}
}
}

调用

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();

其他别人的例子链接：http://linglong117.blog.163.com/blog/static/277145472009127514463/；http://blog.sina.com.cn/s/blog_6427a6b501012omd.html