• 动态调用Webservice


     

    /// ;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;
    /// ;example;
    /// ;code;
    /// object obj = InvokeWebservice("http://localhost/GSP_WorkflowWebservice/common.asmx","Genersoft.Platform.Service.Workflow","Common","GetToolType",new object[]{"1"});
    /// ;/code;
    /// ;/example;
    private 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);

    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 new Exception(ex.InnerException.Message,new Exception(ex.InnerException.StackTrace));
     }
    }

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  • 原文地址:https://www.cnblogs.com/chance/p/478180.html
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