[C#] 纯文本查看 复制代码 一般的WebService引用 都是在已经知道服务页面的名称(例如:我的服务.asmx)和方法的名称(如:
[WebMethod]
public string TestDatabase()
本文说的是另外一种情形: 就是动态调用WebServices
简单说: URL地址和方法的名称 都是作为参数动态传入的
using System.Web.Services.Description;
using System.CodeDom;
using Microsoft.CSharp;
using System.CodeDom.Compiler;
private static string GetWsClassName(string wsUrl)
{
string[] parts = wsUrl.Split('/');
string[] pps = parts[parts.Length - 1].Split('.');
return pps[0];
}
public static object InvokeWebService(string methodname, object[] args,string url)
{
//string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling";
//string url = HttpContext.Current.Session["weburl"].ToString().Trim();
//string url = DataOperation.GetSession("weburl").ToString().Trim();
string classname = GetWsClassName(url);
try
{
//获取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();
//生成客户端代理类代码
CodeCompileUnit ccu = new CodeCompileUnit();
ccu.Namespaces.Add(cn);
sdi.Import(cn, ccu);
//CSharpCodeProvider csc = new CSharpCodeProvider();
CodeDomProvider provider = CodeDomProvider.CreateProvider("CSharp");
// ICodeCompiler icc = provider.CreateCompiler();
//设定编译参数
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");
//编译代理类
CompilerResults cr = provider.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());
}
//生成代理实例,并调用方法
System.Reflection.Assembly assembly = cr.CompiledAssembly;
Type t = assembly.GetType(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));
return "Error:WebService调用错误!"+ex.Message;
}
} |