www.pudn.com > wstest.rar > WebServiceHelper.cs

/* 
 * Author : 方伍 
 * Date: 2008-2-21 
 * Blog: http://www.cnblogs.com/binbin1845 
 * QQ: 32418201 
 * Email: binbin1845@126.com 
 */ 
 
using System; 
using System.Collections.Generic; 
using System.Text; 
 
namespace WSTest 
{ 
    public class WebServiceHelper 
    { 
        /// 
 
        /// 根据指定的信息，调用远程WebService方法 
        /// 
 
        /// WebService的http形式的地址 
        /// 欲调用的WebService的命名空间 
        /// 欲调用的WebService的类名（不包括命名空间前缀） 
        /// 欲调用的WebService的方法名 
        /// 参数列表 
        /// WebService的执行结果 
        ///  
        /// 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。 
        ///  
        ///  
        ///  
        /// object obj = InvokeWebService("http://localhost/Service.asmx","method",new object[]{"1"}); 
        ///  
        ///  
        public static object InvokeWebService(string url, string methodname, object[] args) 
        { 
            try 
            { 
                string @namespace = "WebService.DynamicWebCalling"; 
                string[] parts = url.Split('/'); 
                string[] pps = parts[parts.Length - 1].Split('.'); 
                string classname = pps[0]; 
                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); 
 
                Microsoft.CSharp.CSharpCodeProvider csc = new Microsoft.CSharp.CSharpCodeProvider(); 
                System.CodeDom.Compiler.ICodeCompiler icc = csc.CreateCompiler(); 
 
                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.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()); 
                } 
                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 ex; 
            } 
        } 
    } 
}