动态调用指定URL的 webservice 的指定名称的方法

最新推荐文章于 2024-11-21 14:58:01 发布

转载最新推荐文章于 2024-11-21 14:58:01 发布 · 2.9k 阅读

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#webservice #url #exception #string #object #stream

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本文介绍了一种通过解析WebService信息并动态调用其方法的技术。该技术利用C#实现，可自动生成客户端代理类并调用指定的服务方法。

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/// <summary>
/// 根据解析出来的Web Service 信息动态调用WebService 方法
/// </summary>
/// <param name="url">The Web Service URL</param>
/// <param name="namespace">The Web Service's namespace</param>
/// <param name="classname">The Web Service's classname</param>
/// <param name="methodname">The Web Service's methodname which you want to call</param>
/// <param name="args">the methodname's args</param>
/// <returns>The methodname 's result</returns>
public 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));
}

}