动态加载的程序集 - 设置 &沟通 [英] Dynamically Loaded Assembly - Settings & Communication
问题描述
好的...我有一个 WPF 应用程序(我们称之为 Launcher.exe
),它加载并执行另一个 WPF 应用程序(我们称之为 Loaded.exe
)动态使用这样的东西:
Ok so... I have a WPF application (let's call it Launcher.exe
) which loads and executes another WPF application (let's call it Loaded.exe
) dynamically using something like this:
Byte[] assemblyData;
using (BinaryReader reader = new BinaryReader(new FileStream(filePath, FileMode.Open)))
assemblyData = reader.ReadBytes(Convert.ToInt32(fs.Length));
Assembly assembly = Assembly.Load(assemblyData);
MethodInfo method = assembly.EntryPoint;
if (method != null)
{
Object instance = assembly.CreateInstance(method.Name);
method.Invoke(o, null);
}
现在...问题是 Launched.exe
在文件 Loaded.exe.config
中有它自己的设置,并且它也在绑定中使用它们.例如:
Now... the problem is that Launched.exe
has its own settings in the file Loaded.exe.config
, and it also uses them in bindings. For example:
Topmost="{Binding Mode=TwoWay, Path=Topmost, Source={x:Static p:Settings.Default}}"
第一个问题是,我怎样才能让我的动态加载程序集正确加载/绑定/更新,更一般地说,使用它自己的设置?我不认为它可以自动处理这个......
First question is, how can I make my dynamically loaded assembly properly load/bind/update and, more generally, use its own settings? I don't think it can handle this automagically...
第二个问题是:Loaded.exe
可以和Launcher.exe
通信吗?假设 Loaded.exe
需要一些只有 Launcher.exe
才能检索的数据……它怎么能要求呢?我想我需要在两个程序集之间使用代理之类的东西,但我什至不知道如何开始编码...
Second question is: can Loaded.exe
communicate with Launcher.exe
? Let's say Loaded.exe
needs some data that only Launcher.exe
can retrieve... how can it ask for it? I think I need something like a proxy between the two assemblies, but I can't even figure out how to start coding this...
推荐答案
我想你需要加载一个单独的程序集,它有自己的 .config 文件,不是吗?我这样做的一种方法是在新的 AppDomain 中加载程序集.您可以将该程序集部署在一个单独的文件夹中,其中包含他需要的所有引用.
I supose you'll need to load a separate assembly with it's own .config file, no? One way i do that is to load the assembly in a new AppDomain. You'll could deploy that assembly in a separate folder with all his needed references.
首先设置AppDomain,这里有一个方法:
First setup the AppDomain, here you have a method:
AppDomain getAppDomainForAssembly(string assemblypath, string appdomainname)
{
//this._assembly_file = AssemblyFile;
string _assembly_file_name = System.IO.Path.GetFileName(assemblypath);
string _rootpath = System.IO.Path.GetDirectoryName(assemblypath);
//this._assembly_class_name = AssemblyClassNameToInstance;
AppDomainSetup _app_domain_info = new AppDomainSetup();
_app_domain_info.ApplicationBase = _rootpath;
_app_domain_info.PrivateBinPath = _rootpath;
_app_domain_info.PrivateBinPathProbe = _rootpath;
_app_domain_info.ConfigurationFile = _rootpath + @"\app.config"; //Here put the path to the correct .assembly .config file
AppDomain _app_domain = AppDomain.CreateDomain(
appdomainname, null, _app_domain_info);
return _app_domain;
}
然后获取在程序集上执行该方法的对象的实例:
Then get an instance of the object that executes the method on the assembly:
protected System.Reflection.Assembly _asm_resolve(string assemblyFile)
{
return System.Reflection.Assembly.LoadFrom(assemblyFile);
}
object getInstanceFromAppDomain(ref AppDomain appDomain,
string assemblyPath, string className = null)
{
if (string.IsNullOrEmpty(className))
{
System.Reflection.Assembly assembly = _asm_resolve(assemblyPath);
System.Reflection.MethodInfo method = assembly.EntryPoint;
return appDomain.CreateInstanceFromAndUnwrap(assemblyPath, method.Name);
}
else
{
return appDomain.CreateInstanceFromAndUnwrap(assemblyPath, className);
}
}
即使我们知道对象类型,我们也可以创建一个具有泛型类型的方法:
Even if we know the Object Type, we could create a method with generic type:
T getInstanceFromAppDomain<T>(ref AppDomain appDomain,
string assemblyPath, string className = null)
{
if (string.IsNullOrEmpty(className))
{
System.Reflection.Assembly assembly = _asm_resolve(assemblyPath);
System.Reflection.MethodInfo method = assembly.EntryPoint;
return (T)appDomain.CreateInstanceFromAndUnwrap(assemblyPath, method.Name);
}
else
{
return (T)appDomain.CreateInstanceFromAndUnwrap(assemblyPath, className);
}
}
然后,在创建的实例上调用方法,在新的 appDomain 中执行:
And then, invoke the method on the created instance, wich is executing in the new appDomain:
void executeMethod(Type objecttype, string methodname, ref object instancedObject, object[] methodparams)
{
objecttype.InvokeMember(
methodname, System.Reflection.BindingFlags.InvokeMethod, null, instancedObject, methodparams);
}
你可以这样使用:
AppDomain newappdomain = getAppDomainForAssembly(filePath, "Loaded.exe.domain");
object loadedexe_object = getInstanceFromAppDomain(ref newappdomain,
filePath);
//If you know the method name to call...
executeMethod(loadedexe_object.GetType(), "methodname", ref loadedexe_object, null);
//or get entry point...
executeMethod(loadedexe_object.GetType(),
_asm_resolve(filePath).EntryPoint.Name, ref loadedexe_object, null);
对于第二个问题,您可以使用 NamedPipes、Remoting、WCF...需要在同一台机器上实现进程间通信.看一看 MSDN 文档,用 WCF 覆盖这个场景的代码示例http://msdn.microsoft.com/en-us/library/system.servicemodel.netnamedpipebinding.aspx
For the second question, you could use NamedPipes, Remoting, WCF... You need to implement interprocess communication on the same machine. Take a look at MSDN documentaion, code sample covering this scenario with WCF http://msdn.microsoft.com/en-us/library/system.servicemodel.netnamedpipebinding.aspx
使用远程处理在 CodeProject 上查看此示例通过远程处理的进程间通信
See this sample on CodeProject, using Remoting Inter-process communication via Remoting
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