動態調用Webservice
2024-07-21 02:30:22
供稿：網友
/// <summary>
/// 根據指定的信息，調用遠程webservice方法
/// </summary>
/// <param name="url">webservice的http形式的地址</param>
/// <param name="namespace">欲調用的webservice的命名空間</param>
/// <param name="classname">欲調用的webservice的類名（不包括命名空間前綴）</param>
/// <param name="methodname">欲調用的webservice的方法名</param>
/// <param name="args">參數列表</param>
/// <returns>webservice的執行結果</returns>
/// <remarks>
/// 如果調用失敗，將會拋出exception。請調用的時候，適當截獲異常。
/// 異常信息可能會發生在兩個地方：
/// 1、動態構造webservice的時候，compileassembly失敗。
/// 2、webservice本身執行失敗。
/// </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));
}
}
