调用远程WebService方法

1.Method

        ///   <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>   
        public static object InvokeWebservice(string url, string @namespace, string classname, string methodname, object[] args)
        {
            try
            {
                System.Net.WebClient wc = new System.Net.WebClient();
                System.IO.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, "", "");
                System.CodeDom.CodeNamespace cn = new System.CodeDom.CodeNamespace(@namespace);
                System.CodeDom.CodeCompileUnit ccu = new System.CodeDom.CodeCompileUnit();
                ccu.Namespaces.Add(cn);
                sdi.Import(cn, ccu);
               
                System.CodeDom.Compiler.CompilerParameters cplist = new System.CodeDom.Compiler.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");

                System.CodeDom.Compiler.CodeDomProvider provider = System.CodeDom.Compiler.CodeDomProvider.CreateProvider("CSharp");
                System.CodeDom.Compiler.CompilerResults cr = provider.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());
                }
                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);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace));
            }
        }

2. Web.Config 远程地址配置
 <appSettings>
      <!--ws地址-->
       <add key="WSUrl" value="http://localhost:8000/TestClass.asmx/>
 </appSettings>

3. web端调用
string url= System.Configuration.ConfigurationManager.AppSettings["WSUrl"].ToString();
object oResult = Inter.eCheck.Bll.Common.InvokeWebservice(url, namespace, classname, methodname, object[] args);
if (!(bool)oResult)
{
                        //  for Logics...
}