C# winform 中動態調用Webservice的問題
今天調適一個webservice,發現我的WinForm一直都在調用局域網的Webservice,突然想到,要是我的WinForm程序,想要運行在不同網斷,那應該如何配置我的webservice?
方案一:
1.用一個公用的Webservice.就是把Webservice發布到Internet上,然後,WinForm調用Inernet上的Webservice.
2.在每個局域網都建立Webservice,動態的配置Webservice. 每個Webservice引用后,都會生成一個Reference.cs,然後,在Reference.cs裡面,更改Url或者讀取事先寫在.config文件的Url,編譯成各個局域網的運行程序.
3.建立WebService虚拟代理，使用xml登记WebService的引用地址。实现动态引用WebService.!
using System;using System.Reflection ;using System.Web .Services .Description ;using Microsoft.CSharp;using System.CodeDom ;using System.CodeDom.Compiler ;using System.IO ;using System.Text ;using System.Xml ;using System.Net ;using WebServiceProxy;namespace WebServiceProxy
{
public class WebServiceProxy
{ private Assembly _ass = null; private string _protocolName = "Soap"; private string _srcWSProxy = string.Empty; public Assembly Assembly { get{ return _ass; } } public string ProtocolName { get{ return _protocolName; } set {_protocolName = value; } } public string SrcWSProxy { get{ return _srcWSProxy; } } public WebServiceProxy () {
} public WebServiceProxy (string wsdlSourceName) { AssemblyFromWsdl(GetWsdl(wsdlSourceName)); } public string WsdlFromUrl(string url) { WebRequest req = WebRequest.Create(url); WebResponse result = req.GetResponse(); Stream ReceiveStream = result.GetResponseStream(); Encoding encode = System.Text.Encoding.GetEncoding("utf-8"); StreamReader sr = new StreamReader( ReceiveStream, encode ); string strWsdl = sr.ReadToEnd(); return strWsdl; } public string GetWsdl(string source) { if(source.StartsWith("<?xml version") == true) { return source; } else if(source.StartsWith("http://") == true) { return WsdlFromUrl(source); } return WsdlFromFile(source); } public string WsdlFromFile(string fileFullPathName) { FileInfo fi = new FileInfo(fileFullPathName); if(fi.Extension == "wsdl") { FileStream fs = new FileStream(fileFullPathName, FileMode.Open,FileAccess.Read); StreamReader sr = new StreamReader(fs); char[] buffer = new char[(int)fs.Length]; sr.ReadBlock(buffer, 0, (int)fs.Length); return new string(buffer); } throw new Exception("This is no a wsdl file"); } public Assembly AssemblyFromWsdl(string strWsdl) { StringReader wsdlStringReader = new StringReader(strWsdl); XmlTextReader tr = new XmlTextReader(wsdlStringReader); ServiceDescription sd = ServiceDescription.Read(tr); tr.Close(); // WSDL service description importer CodeNamespace cns = new CodeNamespace("WebServiceProxy.WebServiceAccessor"); ServiceDescriptionImporter sdi = new ServiceDescriptionImporter(); sdi.AddServiceDescription(sd, null, null); sdi.ProtocolName = _protocolName; sdi.Import(cns, null); // source code generation CSharpCodeProvider cscp = new CSharpCodeProvider(); ICodeGenerator icg = cscp.CreateGenerator(); StringBuilder srcStringBuilder = new StringBuilder(); StringWriter sw = new StringWriter(srcStringBuilder); icg.GenerateCodeFromNamespace(cns, sw, null); _srcWSProxy = srcStringBuilder.ToString(); sw.Close(); // assembly compilation. CompilerParameters cp = new CompilerParameters(); cp.ReferencedAssemblies.Add("System.dll"); cp.ReferencedAssemblies.Add("System.Xml.dll"); cp.ReferencedAssemblies.Add("System.Web.Services.dll"); cp.GenerateExecutable = false; cp.GenerateInMemory = true; cp.IncludeDebugInformation = false; ICodeCompiler icc = cscp.CreateCompiler(); CompilerResults cr = icc.CompileAssemblyFromSource(cp, _srcWSProxy); if(cr.Errors.Count > 0) throw new Exception(string.Format("Build failed: {0} errors",cr.Errors.Count)); return _ass = cr.CompiledAssembly; } public object CreateInstance(string objTypeName) { Type t = _ass.GetType("WebServiceProxy.WebServiceAccessor" + "." + objTypeName); return Activator.CreateInstance(t); } public object Invoke(object obj, string methodName, params object[] args) { MethodInfo mi = obj.GetType().GetMethod(methodName); return mi.Invoke(obj, args); } }
}
4.動態調用webservice (Copy from http://doc.readmen.com/1/133950.shtml)
/// <summary> /// 根据指定的信息，调用远程WebService方法 /// </summary> /// <param name="url">WebService的http形式的地址</param> /// <param name="namespace">欲调用的WebService的命名空间</param> /// <param name="classname">欲调用的WebService的类名（不包括命名空间前缀）</param> /// <param name="methodname">欲调用的WebService的方法名</param> /// <param name="args">参数列表</param> /// <returns>WebService的执行结果</returns> /// <remarks> /// 如果调用失败，将会抛出Exception。请调用的时候，适当截获异常。 /// 异常信息可能会发生在两个地方： /// 1、动态构造WebService的时候，CompileAssembly失败。 /// 2、WebService本身执行失败。 /// </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)); } }
兄弟們,還有其他的解決方案嗎?一起討論!
