从C＃，WPF中的dll列表中选择特定的dll [英] Selection of specific dll from list of dll's in C# , WPF

问题描述

大家好，



我的项目是在C＃/ WPF应用程序上，我是这项技术的新手，我遇到问题，选择一个特定的*。 dll，来自dll的主机，



基本上，在Xaml中（我们有3个dll已经在bin文件夹中构建）并映射到xaml中的三个按钮，我需要将特定dll（假设b.dll）的功能连接到一些新按钮。



这里是代码片段。<

 WorkCompletedCallBack callbackServices; 
 WORKCOMPLETEDUI m_call; 
 
  public 列表< imyservice> LoadServices（IMYServiceFinder srvFinder，WORKCOMPLETEDUI回调）
 {
 List< imyservice> srvRefss =  new  List< imyservice>（）; 
 List< string> srvNames = srvFinder.GetServiceDllNames（）; 
  foreach （ string  srvName  in  srvNames）
 {
  //  加载程序集 
程序集asm =  null ; 
 尝试 
 {
 TraceMessage.Info（ 加载服务： + srvName）; 
  asm = Assembly.LoadFile（srvName）; } 
  //   TODO：捕获适当的异常 
  catch （Exception ex）
 {
 TraceMessage.Error（ 加载文件中的异常 + ex.ToString（））; 
 继续; 
} 
 
  //  创建所有服务模块必须实现的ServiceCreat实例 
 ServiceEng.IMyServiceCreator mysc =  null ; 
 尝试 
 {
 mysc = asm.CreateInstance（ < span class =code-string> Services.ServiceCreated） as  HBServiceEngine.IMYServiceCreator; 
  if （mysc ==  null ）
 继续; 
} 
  catch （例外情况）
 {
 TraceMessage.Error（  CreateInstance for ServiceCreat期间的异常 + ex.ToString（））; 
 继续; 
} 
 
  //  获取服务模块支持的服务 
 ServiceEngine.IMYService mys = mysc.CreateService（）; 
 m_call =回调; 
 callbackServices =  new  WorkCompletedCallBack（Refresh）; 
 mys.Init（callbackServices）; 
 
 srvRefss.Add（qbs）; 
} 
  return  srvRefss; 
} 

假设我有4个dll的即，a.dll，b.dll，c.dll，I想要从dll列表中加载特定的dll即b.dll，而不是所有的dll。



详细信息：VS 2010 IDE，Windows 7 o / s



任何解决上述问题的帮助都会非常有帮助。



问候，

VishalK

解决方案

请参阅我过去对此主题的回答：

AppDomain拒绝加载程序集 [ ^ ]，

使用CodeDom生成代码 [ ^ ]，

创建使用Reloadable Plugins的WPF应用程序...... [ ^ ]，

动态加载用户控件 [ ^ ]，

C＃Reflection InvokeMember on existing instance [ ^ ]，

项目和DLL：如何保持它们的可管理性？ [ ^ ]，

通过它的字符串表示从集合中收集类型 [ ^ ]。

-SA

Assembly.LoadFile（AsmFilePath）在指定路径上加载程序集文件的内容。它不会加载文件夹的所有文件。



所以实际上你没有任何问题 - 你决定要上传哪些文件，这意味着每次调用LoadFile只会加载该特定文件。





*我在你的代码中看到你输入的变量被称为 SrvName 这不是一个非常好的文件名，也许这是你混乱的根源？





干杯，

Edo

Hi All,

My Project is on C#/WPF Application, and I am new to this technology, I am facing issues, with selecting a specific *.dll, from host of dll's,

Basically, in Xaml(we have 3 dll's been build in bin folder) and mapped to the three buttons in the xaml, I need to wire the functionality of specific dll(assume b.dll) to some new button.,

here are the code snippets.<

WorkCompletedCallBack callbackServices;
        WORKCOMPLETEDUI m_call;

        public List<imyservice> LoadServices(IMYServiceFinder srvFinder, WORKCOMPLETEDUI callback)
        {
            List<imyservice> srvRefss = new List<imyservice>();
            List<string> srvNames = srvFinder.GetServiceDllNames();
            foreach( string srvName in srvNames)
            {
                // Load the Assembly
                Assembly asm = null;
                try
                {
                    TraceMessage.Info("Load service : " + srvName);
                    asm = Assembly.LoadFile(srvName);                }
                // TODO: Catch appropriate exception
                catch(Exception ex)
                {
                    TraceMessage.Error("Exception during load file " + ex.ToString());                   
                    continue;
                }

                // Create the ServiceCreat instance which all the service module must implement
              ServiceEng.IMyServiceCreator mysc = null;
                try
                {
                    mysc = asm.CreateInstance("Services.ServiceCreated") as HBServiceEngine.IMYServiceCreator;
                    if (mysc == null)
                        continue;
                }
                catch (Exception ex)
                {
                    TraceMessage.Error("Exception during CreateInstance for ServiceCreat " + ex.ToString());                   
                    continue;
                }

                // Get the services that are supported by the service module
                ServiceEngine.IMYService mys = mysc.CreateService();
                m_call = callback;
                callbackServices = new WorkCompletedCallBack(Refresh);
                mys.Init(callbackServices);

                srvRefss.Add(qbs);
            }
            return srvRefss;
        }

Assuming, I have 4 dll's viz., a.dll, b.dll, c.dll, I want to load a specific dll viz., b.dll from the dll list, instead of all the dll's.

Details: VS 2010 IDE, Windows 7 o/s

Any help in resolving the above would be very helpful.

Regards,
VishalK

解决方案

Please see my past answers on this topic:
AppDomain refuses to load an assembly[^],
code generating using CodeDom[^],
Create WPF Application that uses Reloadable Plugins...[^],
Dynamically Load User Controls[^],
C# Reflection InvokeMember on existing instance[^],
Projects and DLL's: How to keep them managable?[^],
Gathering types from assemblies by it's string representation[^].

—SA

Assembly.LoadFile(AsmFilePath) Loads the contents of an assembly file on the specified path. It does not load all the files of a folder.

So actually you don't have any problem - you decide which files to upload, meaning that each call to the LoadFile will load that specific file only.


* I see in your code that the variable you have as input is called SrvName which is not a very good name for a file, perhaps that is the source of your confusion?


Cheers,
Edo

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