C # dynamically call WebServices

I. Method InvokeWebservice

/// <Summary>

/// Call the remote WebService Method Based on the specified information

/// </Summary>

/// <Param name = "url"> http address of WebService </param>

/// <Param name = "namespace"> namespace of the WebService to be called </param>

/// <Param name = "classname"> name of the WebService class to be called (excluding the namespace prefix) </param>

/// <Param name = "methodname"> Method name of the WebService to be called </param>

/// <Param name = "args"> parameter list </param>

/// <Returns> execution result of WebService </returns>

/// <Remarks>

/// If the call fails, an Exception is thrown. During the call, an exception is intercepted as appropriate.

/// Exception information may occur in two places:

/// 1. CompileAssembly fails when a WebService is dynamically constructed.

/// 2. the WebService itself fails to be executed.

/// </Remarks>

/// <Example>

/// <Code>

/// Object obj = InvokeWebservice ("http: // localhost/GSP_WorkflowWebservice/common. asmx "," Genersoft. platform. service. workflow "," Common "," GetToolType ", new object [] {" 1 "});

/// </Code>

/// </Example>

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 );

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 ));

}

}

 

Ii. Call

Object [] Object = new object [] {"Sun"}; // defines the object Array

Object aa = InvokeWebservice ("http: // 192.168.1.200: 111", "WebService2", "Service1", "show", Object );

TextBox1.Text = aa. ToString ();