Posted on 2006-05-30 09:13
自適應軟件...... 阅读(4156)
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.Net technology
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!