从 AppDomain 获取静态列表
Get static List from AppDomain
我想访问将在 Class1 中创建的 Class2 的静态列表。
Class1在一个AppDomain中加载，Class2在另一个AppDomain中加载。
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。
我想我必须访问 Class1 中的同一个 AppDomain 才能获得 Class2，但是如果 Class1 的对象在不同的 AppDomain 中，我该如何实现呢？
顺便说一句：没必要把Class2放在其他AppDomain里，但我想如果我愿意的话我可以得到同样的对象。
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），有人可以说为什么您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（每个实例自己计算）：
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：类库2
[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：PluginLoader
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();
}
}
静态变量仅限于当前App域。如果你有 N 个不同的应用程序域，那么你有 N 个不同的静态值 属性.
在C# Language Specification 5.0中：
10.5.1 A static field is not part of a specific instance; instead, it is shared amongst all instances of a closed type (§4.4.2). No matter how many instances of a closed class type are created, there is only ever one copy of a static field for the associated application domain.
我想访问将在 Class1 中创建的 Class2 的静态列表。
Class1在一个AppDomain中加载，Class2在另一个AppDomain中加载。 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。
我想我必须访问 Class1 中的同一个 AppDomain 才能获得 Class2，但是如果 Class1 的对象在不同的 AppDomain 中，我该如何实现呢？
顺便说一句：没必要把Class2放在其他AppDomain里，但我想如果我愿意的话我可以得到同样的对象。
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），有人可以说为什么您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（每个实例自己计算）：
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：类库2
[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：PluginLoader
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();
}
}
静态变量仅限于当前App域。如果你有 N 个不同的应用程序域，那么你有 N 个不同的静态值 属性.
在C# Language Specification 5.0中：
10.5.1 A static field is not part of a specific instance; instead, it is shared amongst all instances of a closed type (§4.4.2). No matter how many instances of a closed class type are created, there is only ever one copy of a static field for the associated application domain.