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/// <summary>
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/// 根据指定的信息,调用远程WebService方法
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/// </summary>
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/// <param name="url">WebService的http形式的地址</param>
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/// <param name="namespace">欲调用的WebService的命名空间</param>
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/// <param name="classname">欲调用的WebService的类名(不包括命名空间前缀)</param>
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/// <param name="methodname">欲调用的WebService的方法名</param>
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/// <param name="args">参数列表</param>
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/// <returns>WebService的执行结果</returns>
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/// <remarks>
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/// 如果调用失败,将会抛出Exception。请调用的时候,适当截获异常。
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/// 异常信息可能会发生在两个地方:
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/// 1、动态构造WebService的时候,CompileAssembly失败。
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/// 2、WebService本身执行失败。
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/// </remarks>
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/// <example>
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/// <code>
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/// object obj = InvokeWebservice("http://localhost/GSP_WorkflowWebservice/common.asmx","Genersoft.Platform.Service.Workflow","Common","GetToolType",new object[]{"1"});
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/// </code>
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/// </example>
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private object InvokeWebservice(string url, string @namespace, string classname, string methodname, object[] args)
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{
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try
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{
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System.Net.WebClient wc = new System.Net.WebClient();
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System.IO.Stream stream = wc.OpenRead(url + "?WSDL");
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System.Web.Services.Description.ServiceDescription sd = System.Web.Services.Description.ServiceDescription.Read(stream);
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System.Web.Services.Description.ServiceDescriptionImporter sdi = new System.Web.Services.Description.ServiceDescriptionImporter();
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sdi.AddServiceDescription(sd, "", "");
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System.CodeDom.CodeNamespace cn = new System.CodeDom.CodeNamespace(@namespace);
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System.CodeDom.CodeCompileUnit ccu = new System.CodeDom.CodeCompileUnit();
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ccu.Namespaces.Add(cn);
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sdi.Import(cn, ccu);
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Microsoft.CSharp.CSharpCodeProvider csc = new Microsoft.CSharp.CSharpCodeProvider();
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System.CodeDom.Compiler.ICodeCompiler icc = csc.CreateCompiler();
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System.CodeDom.Compiler.CompilerParameters cplist = new System.CodeDom.Compiler.CompilerParameters();
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cplist.GenerateExecutable = false;
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cplist.GenerateInMemory = true;
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cplist.ReferencedAssemblies.Add("System.dll");
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cplist.ReferencedAssemblies.Add("System.XML.dll");
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cplist.ReferencedAssemblies.Add("System.Web.Services.dll");
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cplist.ReferencedAssemblies.Add("System.Data.dll");
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System.CodeDom.Compiler.CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);
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if (true == cr.Errors.HasErrors)
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{
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System.Text.StringBuilder sb = new System.Text.StringBuilder();
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foreach (System.CodeDom.Compiler.CompilerError ce in cr.Errors)
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{
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sb.Append(ce.ToString());
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sb.Append(System.Environment.NewLine);
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}
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throw new Exception(sb.ToString());
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}
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System.Reflection.Assembly assembly = cr.CompiledAssembly;
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Type t = assembly.GetType(@namespace + "." + classname, true, true);
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object obj = Activator.CreateInstance(t);
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System.Reflection.MethodInfo mi = t.GetMethod(methodname);
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return mi.Invoke(obj, args);
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}
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catch (Exception ex)
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{
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throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace));
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}
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}
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