【发布时间】：2015-02-27 09:09:58
【问题描述】：
我想访问 Class2 的静态列表，该列表将在 Class1 中创建。
Class1 加载到一个 AppDomain 中，而 Class2 加载到另一个 AppDomain 中。 但是如果我想访问 Class2 中的静态列表，我会得到两个不同的列表。
我认为我必须访问 Class1 中的同一个 AppDomain 才能获得 Class2，但是如果 Class1 的对象位于不同的 AppDomain 中，我该如何实现呢？
顺便说一句：没有必要将 Class2 放在另一个 AppDomain 中，但我认为如果我愿意，我可以得到相同的对象。
这是我的代码：
public class Class1 : MarshalByRefObject
{
Class2 class2;
public Class2 Class2
{
get { return class2; }
set { class2 = value; }
}
public Class1()
{
AppDomain adc2 = AppDomain.CreateDomain("adc2");
class2 = (Class2)adc2.CreateInstanceAndUnwrap(typeof(Class2).Assembly.FullName, typeof(Class2).FullName);
}
}
public class Class2 : MarshalByRefObject
{
static List<int> myIntegers = new List<int>();
public static List<int> MyIntegers
{
get { return Class2.myIntegers; }
set { Class2.myIntegers = value; }
}
public void AddInteger(int integer)
{
myIntegers.Add(integer);
}
public override string ToString()
{
StringBuilder sb = new StringBuilder();
foreach (int integer in myIntegers)
{
sb.AppendLine(integer.ToString());
}
return sb.ToString();
}
}
class Program
{
static void Main(string[] args)
{
Type type1 = typeof(Class1);
AppDomain ad1 = AppDomain.CreateDomain("ad1");
Class1 ad1t1 = (Class1)ad1.CreateInstanceFromAndUnwrap(type1.Assembly.Location, type1.FullName);
AppDomain ad2 = AppDomain.CreateDomain("ad2");
Class1 ad2t1 = (Class1)ad2.CreateInstanceFromAndUnwrap(type1.Assembly.Location, type1.FullName);
ad1t1.Class2.AddInteger(0);
ad2t1.Class2.AddInteger(1);
Console.WriteLine(ad1t1.Class2.ToString()); //Output: 0
Console.WriteLine(ad2t1.Class2.ToString()); //Output: 1
//
Console.ReadKey();
}
}
编辑
好的，我发现我的插件加载器是罪魁祸首。 如果您将使用不同的插件加载器（或至少一个加载器），有人能说出为什么不能跨应用程序域工作吗？
如果所有文件都在一个程序集中，它将起作用（增量为 3）。在我的场景中（许多不同的程序集）我只得到 1,1,1
如果有人需要更多信息来帮助我，请随时提出要求。
示例 1（每个 Instance 自己计算）：
程序集：主要
PluginLoader.PluginLoader<IPlugin> pluginLoader1 = new PluginLoader.PluginLoader<IPlugin>(new DirectoryInfo(Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location)));
IPlugin cl1 = pluginLoader1.Activate("MyLibrary.dll", "MyLibrary.Class1");
PluginLoader.PluginLoader<IPlugin> pluginLoader2 = new PluginLoader.PluginLoader<IPlugin>(new DirectoryInfo(Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location)));
IPlugin cl3 = pluginLoader2.Activate("MyLibrary2.dll", "MyLibrary2.Class3");
//Increment() increases a static variable starting by 0
cl1.Increment();
Console.WriteLine(cl1.ToString()); //Output: 1
cl3.Increment();
Console.WriteLine(cl3.ToString()); //Output: 1
ClassLibrary2.Class2 class2 = new ClassLibrary2.Class2();
class2.Increment();
Console.WriteLine(class2.ToString()); //Output: 1
程序集：ClassLibrary2
[Serializable]
public class Class2 : IPlugin
{
public Class2() { }
public override string ToString()
{
return incrementer.ToString();
}
static int incrementer = 0;
public void Increment()
{
incrementer++;
}
}
程序集：我的图书馆
public class Class1 : MarshalByRefObject, IPlugin
{
Class2 class2;
public Class2 Class2
{
get { return class2; }
set { class2 = value; }
}
public Class1()
{
PluginLoader.PluginLoader<Class2> pluginLoader = new PluginLoader.PluginLoader<Class2>(new DirectoryInfo(Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location)));
class2 = pluginLoader.Activate("ClassLibrary2.dll", "ClassLibrary2.Class2");
//AppDomain adc2 = AppDomain.CreateDomain("adc2");
//class2 = (Class2)adc2.CreateInstanceAndUnwrap(typeof(Class2).Assembly.FullName, typeof(Class2).FullName);
}
public void Increment()
{
this.class2.Increment();
}
public override string ToString()
{
return AppDomain.CurrentDomain.FriendlyName+": "+ this.class2.ToString();
}
}
程序集：MyLibrary2
public class Class3 : MarshalByRefObject, IPlugin
{
Class2 class2;
public Class2 Class2
{
get { return class2; }
set { class2 = value; }
}
public Class3()
{
PluginLoader.PluginLoader<Class2> pluginLoader = new PluginLoader.PluginLoader<Class2>(new DirectoryInfo(Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location)));
class2 = pluginLoader.Activate("ClassLibrary2.dll", "ClassLibrary2.Class2");
//AppDomain adc2 = AppDomain.CreateDomain("adc2");
//class2 = (Class2)adc2.CreateInstanceAndUnwrap(typeof(Class2).Assembly.FullName, typeof(Class2).FullName);
}
public void Increment()
{
this.class2.Increment();
}
public override string ToString()
{
return AppDomain.CurrentDomain.FriendlyName + ": " + this.class2.ToString();
}
}
程序集：插件接口
public interface IPlugin
{
void Increment();
}
程序集：插件加载器
public class PluginLoader<T> where T : IPlugin
{
//Here are placed all Fields
#region Fields
string path;
System.AppDomain appDomain;
#endregion
//Here are placed all Properties
#region Properties
public List<KeyValuePair<String, String>> Plugins
{
get { return (List<KeyValuePair<String, String>>)appDomain.GetData("Plugins"); }
}
#endregion
//Here are placed all Constructors
#region Constructors
public PluginLoader(DirectoryInfo path)
{
this.path = path.FullName;
if (!path.Exists)
path.Create();
AppDomainSetup appDomainSetup = new AppDomainSetup();
appDomainSetup.AppDomainInitializer = new AppDomainInitializer(GetInterfaceTypes);
appDomainSetup.AppDomainInitializerArguments = new string[] { this.path };
appDomain = AppDomain.CreateDomain(typeof(T).Name, null, appDomainSetup);
}
#endregion
#region Methods
private static void GetInterfaceTypes(string[] args)
{
AppDomain appDomain = System.AppDomain.CurrentDomain;
string[] files = Directory.GetFiles(args[0], "*.dll", SearchOption.AllDirectories);
List<KeyValuePair<String, String>> infos = new List<KeyValuePair<String, String>>();
foreach (string file in files)
{
try
{
Assembly asm = Assembly.LoadFrom(file);
foreach (Type type in asm.GetTypes())
{
if (typeof(T).IsAssignableFrom(type))
infos.Add(new KeyValuePair<string, string>(file, type.FullName));
}
}
catch (Exception ex)
{
}
}
appDomain.SetData("Plugins", infos);
}
public virtual T Activate(String assemblyFile, String type, params object[] args)
{
try
{
T instance = (T)this.appDomain.CreateInstanceFromAndUnwrap(Path.Combine(this.path, Path.GetFileName(assemblyFile)), type, args);
return instance;
}
catch (Exception ex)
{
throw ex;
}
}
#endregion
}
示例2（每个实例计数相同的增量变量）：
将所有类放在一个程序集中。
public interface IPlugin
{
void Increment();
}
[Serializable]
public class Class1 : IPlugin
{
public Class1() { }
static int incrementer = 0;
public void Increment()
{
incrementer++;
}
public override string ToString()
{
return incrementer.ToString();
}
}
class PluginLoader<T> where T : IPlugin
{
//Here are placed all Fields
#region Fields
string path;
System.AppDomain appDomain;
#endregion
//Here are placed all Properties
#region Properties
public List<KeyValuePair<String, String>> Plugins
{
get { return (List<KeyValuePair<String, String>>)appDomain.GetData("Plugins"); }
}
#endregion
//Here are placed all Constructors
#region Constructors
public PluginLoader(DirectoryInfo path)
{
this.path = path.FullName;
if (!path.Exists)
path.Create();
AppDomainSetup appDomainSetup = new AppDomainSetup();
appDomainSetup.AppDomainInitializer = new AppDomainInitializer(GetInterfaceTypes);
appDomainSetup.AppDomainInitializerArguments = new string[] { this.path };
appDomain = AppDomain.CreateDomain(typeof(T).Name, null, appDomainSetup);
}
#endregion
#region Methods
private static void GetInterfaceTypes(string[] args)
{
AppDomain appDomain = System.AppDomain.CurrentDomain;
string[] files = Directory.GetFiles(args[0], "*.dll", SearchOption.AllDirectories);
List<KeyValuePair<String, String>> infos = new List<KeyValuePair<String, String>>();
foreach (string file in files)
{
try
{
Assembly asm = Assembly.LoadFrom(file);
foreach (Type type in asm.GetTypes())
{
if (typeof(T).IsAssignableFrom(type))
infos.Add(new KeyValuePair<string, string>(file, type.FullName));
}
}
catch (Exception ex)
{
}
}
appDomain.SetData("Plugins", infos);
}
public virtual T Activate(String assemblyFile, String type, params object[] args)
{
try
{
T instance = (T)this.appDomain.CreateInstanceFromAndUnwrap(Path.Combine(this.path, Path.GetFileName(assemblyFile)), type, args);
return instance;
}
catch (Exception ex)
{
throw ex;
}
}
#endregion
}
class Program
{
static void Main(string[] args)
{
string file = System.Reflection.Assembly.GetExecutingAssembly().Location;
string path = Path.GetDirectoryName(file);
PluginLoader<IPlugin> pluginLoader1 = new PluginLoader<IPlugin>(new DirectoryInfo(path));
IPlugin cl1 = pluginLoader1.Activate(file, "AppDomainCheck.Class1");
PluginLoader<IPlugin> pluginLoader2 = new PluginLoader<IPlugin>(new DirectoryInfo(path));
IPlugin cl3 = pluginLoader1.Activate(file, "AppDomainCheck.Class1");
cl1.Increment();
Console.WriteLine(cl1.ToString()); //Output: 1
cl3.Increment();
Console.WriteLine(cl3.ToString()); //Output: 2
Console.ReadKey();
}
}
【问题讨论】：
-
我也读过这条评论，但是当我在我的应用程序中尝试它时，它不起作用。所以其他东西与我的代码示例不相等（在上面的示例中有效）。
-
抱歉在这里粘贴了错误的链接，您的答案似乎发生在他的问题中:) stackoverflow.com/q/4298913/1505865
-
是的，这就是使用 Serializable 而不是 MarshalByRefObject 的技巧，这也适用于我上面的示例。但是在我的主要应用程序中它不起作用。所以目前我试图找出不同之处。