. NET Dynamic Call WebService

C#. NET Dynamic call WebService implementation ideas and code

The dynamic invocation of the Web service performs the following steps: Get wsdl/generate client proxy class code/Set compilation parameters/Compile proxy class/build proxy instance, and invoke method, very detailed, interested you don't miss out on ha

Using System;

Using System.Collections.Generic;

Using System.Linq;

Using System.Web;

Using System.Net;

Using System.IO;

Using System.Web.Services.Description;

Using System.CodeDom;

Using Microsoft.csharp;

Using System.CodeDom.Compiler;

Using System.Reflection;

Namespace HTTPS

{

public class Wshelper

{

< summary>

Dynamically invoking Web Services

</summary>

< param name= "url" >wsdl service address </param>

< param name= "methodname" > method name </param>

< param name= "args" > Parameters </param>

< returns></returns>

public static object Invokewebservice (string URL, String methodname, object[] args)

{

Return wshelper.invokewebservice (URL, null, methodname, args);

}

< summary>

Dynamically invoking Web Services

</summary>

< param name= "url" >wsdl service address </param>

< param name= "classname" > class name </param>

< param name= "methodname" > method name </param>

< param name= "args" > Parameters </param>

< returns></returns>

public static object Invokewebservice (string url, string classname, String methodname, object[] args)

{

String @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling";

if ((classname = = null) | | (ClassName = = ""))

{

classname = wshelper.getwsclassname (URL);

}

Try

{//Get WSDL

WebClient WC = new WebClient ();

Stream stream = WC. OpenRead (URL + "?) WSDL ");

ServiceDescription sd = Servicedescription.read (stream);

ServiceDescriptionImporter SDI = new ServiceDescriptionImporter ();

Sdi. Addservicedescription (SD, "", "");

CodeNamespace cn = new CodeNamespace (@namespace);

Generate the client proxy class code

CodeCompileUnit CCU = new CodeCompileUnit ();

Ccu. Namespaces.add (CN);

Sdi. Import (CN, CCU);

CSharpCodeProvider ICC = new CSharpCodeProvider ();

Setting compilation parameters

CompilerParameters cplist = new 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");

Compiling proxy classes

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 ());

}

Build the proxy instance and call the method

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);

PropertyInfo PropertyInfo = type. GetProperty (PropertyName);

return propertyinfo.getvalue (obj, null);

}

catch (Exception ex)

{

throw new Exception (ex. Innerexception.message, New Exception (ex. Innerexception.stacktrace));

}

}

private static string Getwsclassname (String wsurl)

{

string[] parts = wsurl.split ('/');

string[] pps = parts[parts. LENGTH-1]. Split ('. ');

return pps[0];

}

}

}

Call

String url = "Http://webservice.webxml.com.cn/WebServices/TrainTimeWebService.asmx";

string[] args = new string[2];

Args[0] = "k123";

ARGS[1] = "";

Object result = Wshelper.invokewebservice (URL, "Getdetailinfobytraincode", args);

DataSet ds = (DataSet) result;

This. Gridview1.datasource = ds;

This. Gridview1.databind ();

. NET Dynamic Call WebService