AppDomain.DynamicDirectory Propriedade

Definição

Obtém o diretório que usa o resolvedor de assembly para sondar assemblies criados dinamicamente.Gets the directory that the assembly resolver uses to probe for dynamically created assemblies.

public:
 property System::String ^ DynamicDirectory { System::String ^ get(); };
public string DynamicDirectory { get; }
member this.DynamicDirectory : string
Public ReadOnly Property DynamicDirectory As String

Valor da propriedade

O diretório que usa o resolvedor de assembly para sondar assemblies criados dinamicamente.The directory that the assembly resolver uses to probe for dynamically created assemblies.

Implementações

Exceções

A operação é tentada em um domínio de aplicativo descarregado.The operation is attempted on an unloaded application domain.

Exemplos

O exemplo a seguir cria um domínio de aplicativo com um diretório para assemblies dinâmicos, emite um assembly dinâmico e o armazena no diretório dinâmico e, em seguida, carrega o assembly no novo domínio de aplicativo e o utiliza.The following example creates an application domain with a directory for dynamic assemblies, emits a dynamic assembly and stores it in the dynamic directory, and then loads the assembly into the new application domain and uses it.

O exemplo cria um objeto AppDomainSetup e define sua propriedade ApplicationName como "example" e sua propriedade DynamicBase como "C:\DynamicAssemblyDir".The example creates an AppDomainSetup object and sets its ApplicationName property to "Example" and its DynamicBase property to "C:\DynamicAssemblyDir". Em seguida, o exemplo exibe a propriedade DynamicBase, para mostrar que o código hash do nome do aplicativo foi acrescentado como um subdiretório do caminho que foi originalmente atribuído.The example then displays the DynamicBase property, to show that the hash code of the application name has been appended as a subdirectory of the path that was originally assigned.

Observação

O diretório base neste exemplo deve estar fora do caminho de investigação para o aplicativo de exemplo.The base directory in this example is intended to be outside the probing path for the example application. Certifique-se de compilar o exemplo em um local diferente.Be sure to compile the example in a different location. Exclua o diretório base e todos os seus subdiretórios sempre que você executar o exemplo.Delete the base directory and all its subdirectories each time you run the example.

O exemplo cria um novo domínio de aplicativo, usando o objeto AppDomainSetup.The example creates a new application domain, using the AppDomainSetup object. O exemplo usa a propriedade DynamicDirectory para recuperar o nome do diretório, para que ele possa criar o diretório.The example uses the DynamicDirectory property to retrieve the name of the directory, so it can create the directory. (O exemplo poderia facilmente criar o diretório com a concatenação do caminho original, o código hash do nome do aplicativo e o nome do aplicativo.)(The example could just as easily create the directory beforehand by concatenating the original path, the hash code of the application name, and the application name.)

O exemplo tem um método GenerateDynamicAssembly que emite um assembly chamado DynamicHelloWorld.dll e o armazena no diretório dinâmico do novo domínio do aplicativo.The example has a GenerateDynamicAssembly method that emits an assembly named DynamicHelloWorld.dll and stores it in the new application domain's dynamic directory. O assembly dinâmico contém um tipo, HelloWorld, que tem um método estático (Shared método em Visual Basic) chamado HelloFromAD.The dynamic assembly contains one type, HelloWorld, that has a static method (Shared method in Visual Basic) named HelloFromAD. Chamar esse método exibe o nome do domínio do aplicativo.Calling this method displays the name of the application domain.

A classe Example deriva de MarshalByRefObject, portanto, o exemplo pode criar uma instância da classe no novo domínio do aplicativo e chamar seu método Test.The Example class derives from MarshalByRefObject, so the example can create an instance of the class in the new application domain and call its Test method. O método Test carrega o assembly dinâmico por seu nome de exibição e chama o método de HelloFromAD estático.The Test method loads the dynamic assembly by its display name and calls the static HelloFromAD method.

Você pode mostrar que o diretório dinâmico é pesquisado após os caminhos de investigação normais, escrevendo código para um assembly chamado DynamicHelloWorld.dll e compilá-lo no mesmo diretório que este exemplo.You can show that the dynamic directory is searched after the normal probing paths by writing code for an assembly named DynamicHelloWorld.dll and compiling it in the same directory as this example. O assembly deve ter uma classe chamada HelloWorld com um método estático chamado HelloFromAD.The assembly must have a class named HelloWorld with a static method named HelloFromAD. Esse método não precisa ter a mesma funcionalidade que a do exemplo; Ele pode simplesmente exibir uma cadeia de caracteres para o console.This method does not have to have the same functionality as the one in the example; it can simply display a string to the console. O assembly também deve ter um atributo AssemblyVersionAttribute que define sua versão como 1.0.0.0.The assembly must also have an AssemblyVersionAttribute attribute that sets its version to 1.0.0.0. Quando você executa o exemplo, o assembly que você compilou no diretório atual é encontrado antes que o diretório dinâmico seja pesquisado.When you run the example, the assembly you compiled in the current directory is found before the dynamic directory is searched.

using namespace System;
using namespace System::Reflection;
using namespace System::Reflection::Emit;

public ref class Example : MarshalByRefObject
{
public:
   void Test()
   {
      Assembly^ dynAssem = Assembly::Load(
         "DynamicHelloWorld, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null");

      Type^ myType = dynAssem->GetType("HelloWorld");
      myType->InvokeMember("HelloFromAD", BindingFlags::Public | 
         BindingFlags::Static | BindingFlags::InvokeMethod, 
         Type::DefaultBinder, nullptr, nullptr);
   }
};


static void GenerateDynamicAssembly(String^ location)
{
   // Define the dynamic assembly and the module. There is only one
   // module in this assembly. Note that the call to DefineDynamicAssembly 
   // specifies the location where the assembly will be saved. The 
   // assembly version is 1.0.0.0.
   //
   AssemblyName^ asmName = gcnew AssemblyName("DynamicHelloWorld");
   asmName->Version = gcnew Version("1.0.0.0");

   AssemblyBuilder^ ab = 
      AppDomain::CurrentDomain->DefineDynamicAssembly( 
         asmName, AssemblyBuilderAccess::Save, location);

   String^ moduleName = asmName->Name + ".exe";
   ModuleBuilder^ mb = ab->DefineDynamicModule(asmName->Name, moduleName);
   
   // Define the "HelloWorld" type, with one static method.
   TypeBuilder^ tb = mb->DefineType("HelloWorld", TypeAttributes::Public);
   MethodBuilder^ hello = tb->DefineMethod("HelloFromAD", 
      MethodAttributes::Public | MethodAttributes::Static, nullptr, nullptr);

   // The method displays a message that contains the name of the application
   // domain where the method is executed.
   ILGenerator^ il = hello->GetILGenerator();
   il->Emit(OpCodes::Ldstr, "Hello from '{0}'!");
   il->Emit(OpCodes::Call, AppDomain::typeid->GetProperty("CurrentDomain")->GetGetMethod());
   il->Emit(OpCodes::Call, AppDomain::typeid->GetProperty("FriendlyName")->GetGetMethod());
   il->Emit(OpCodes::Call, Console::typeid->GetMethod("WriteLine", 
                            gcnew array<Type^> { String::typeid, String::typeid }));
   il->Emit(OpCodes::Ret);

   // Complete the HelloWorld type and save the assembly. The assembly
   // is placed in the location specified by DefineDynamicAssembly.
   Type^ myType = tb->CreateType();
   ab->Save(moduleName);
};

void main()
{
   // Prepare to create a new application domain.
   AppDomainSetup^ setup = gcnew AppDomainSetup();

   // Set the application name before setting the dynamic base.
   setup->ApplicationName = "Example";
   
   // Set the location of the base directory where assembly resolution 
   // probes for dynamic assemblies. Note that the hash code of the 
   // application name is concatenated to the base directory name you 
   // supply. 
   setup->DynamicBase = "C:\\DynamicAssemblyDir";
   Console::WriteLine("DynamicBase is set to '{0}'.", setup->DynamicBase);

   AppDomain^ ad = AppDomain::CreateDomain("MyDomain", nullptr, setup);
   
   // The dynamic directory name is the dynamic base concatenated with
   // the application name: <DynamicBase>\<hash code>\<ApplicationName>
   String^ dynamicDir = ad->DynamicDirectory;
   Console::WriteLine("Dynamic directory is '{0}'.", dynamicDir);

   // The AssemblyBuilder won't create this directory automatically.
   if (!System::IO::Directory::Exists(dynamicDir))
   {
      Console::WriteLine("Creating the dynamic directory.");
      System::IO::Directory::CreateDirectory(dynamicDir);
   }

   // Generate a dynamic assembly and store it in the dynamic 
   // directory.
   GenerateDynamicAssembly(dynamicDir);

   // Create an instance of the Example class in the application domain,
   // and call its Test method to load the dynamic assembly and use it.
   Example^ ex = (Example^) ad->CreateInstanceAndUnwrap( 
         Example::typeid->Assembly->FullName, "Example");
   ex->Test();
}

/* This example produces output similar to the following:

DynamicBase is set to 'C:\DynamicAssemblyDir\5e4a7545'.
Dynamic directory is 'C:\DynamicAssemblyDir\5e4a7545\Example'.
Creating the dynamic directory.
Hello from 'MyDomain'!
 */
using System;
using System.Reflection;
using System.Reflection.Emit;

public class Example : MarshalByRefObject
{
   static void Main()
   {
      // Prepare to create a new application domain.
      AppDomainSetup setup = new AppDomainSetup();
   
      // Set the application name before setting the dynamic base.
      setup.ApplicationName = "Example";
   
      // Set the location of the base directory where assembly resolution 
      // probes for dynamic assemblies. Note that the hash code of the 
      // application name is concatenated to the base directory name you 
      // supply. 
      setup.DynamicBase = "C:\\DynamicAssemblyDir";
      Console.WriteLine("DynamicBase is set to '{0}'.", setup.DynamicBase);

      AppDomain ad = AppDomain.CreateDomain("MyDomain", null, setup);
   
      // The dynamic directory name is the dynamic base concatenated with
      // the application name: <DynamicBase>\<hash code>\<ApplicationName>
      string dynamicDir = ad.DynamicDirectory;
      Console.WriteLine("Dynamic directory is '{0}'.", dynamicDir);

      // The AssemblyBuilder won't create this directory automatically.
      if (!System.IO.Directory.Exists(dynamicDir))
      {
         Console.WriteLine("Creating the dynamic directory.");
         System.IO.Directory.CreateDirectory(dynamicDir);
      }

      // Generate a dynamic assembly and store it in the dynamic 
      // directory.
      GenerateDynamicAssembly(dynamicDir);

      // Create an instance of the Example class in the application domain,
      // and call its Test method to load the dynamic assembly and use it.
      Example ex = (Example) ad.CreateInstanceAndUnwrap(
         typeof(Example).Assembly.FullName, "Example");
      ex.Test();
   }

   public void Test()
   {
      Assembly dynAssem = Assembly.Load(
         "DynamicHelloWorld, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null");

      Type myType = dynAssem.GetType("HelloWorld");
      myType.InvokeMember("HelloFromAD", BindingFlags.Public | 
         BindingFlags.Static | BindingFlags.InvokeMethod, 
         Type.DefaultBinder, null, null);
   }

   private static void GenerateDynamicAssembly(string location)
   {
      // Define the dynamic assembly and the module. There is only one
      // module in this assembly. Note that the call to DefineDynamicAssembly 
      // specifies the location where the assembly will be saved. The 
      // assembly version is 1.0.0.0.
      //
      AssemblyName asmName = new AssemblyName("DynamicHelloWorld");
      asmName.Version = new Version("1.0.0.0");

      AssemblyBuilder ab = 
         AppDomain.CurrentDomain.DefineDynamicAssembly( 
            asmName, AssemblyBuilderAccess.Save, location);

      String moduleName = asmName.Name + ".exe";
      ModuleBuilder mb = ab.DefineDynamicModule(asmName.Name, moduleName);
      
      // Define the "HelloWorld" type, with one static method.
      TypeBuilder tb = mb.DefineType("HelloWorld", TypeAttributes.Public);
      MethodBuilder hello = tb.DefineMethod("HelloFromAD", 
         MethodAttributes.Public | MethodAttributes.Static, null, null);

      // The method displays a message that contains the name of the application
      // domain where the method is executed.
      ILGenerator il = hello.GetILGenerator();
      il.Emit(OpCodes.Ldstr, "Hello from '{0}'!");
      il.Emit(OpCodes.Call, typeof(AppDomain).GetProperty("CurrentDomain").GetGetMethod());
      il.Emit(OpCodes.Call, typeof(AppDomain).GetProperty("FriendlyName").GetGetMethod());
      il.Emit(OpCodes.Call, typeof(Console).GetMethod("WriteLine", 
                             new Type[] { typeof(String), typeof(String) }));
      il.Emit(OpCodes.Ret);

      // Complete the HelloWorld type and save the assembly. The assembly
      // is placed in the location specified by DefineDynamicAssembly.
      Type myType = tb.CreateType();
      ab.Save(moduleName);
   }
}

/* This example produces output similar to the following:

DynamicBase is set to 'C:\DynamicAssemblyDir\5e4a7545'.
Dynamic directory is 'C:\DynamicAssemblyDir\5e4a7545\Example'.
Creating the dynamic directory.
Hello from 'MyDomain'!
 */
Imports System.Reflection
Imports System.Reflection.Emit

Public Class Example 
   Inherits MarshalByRefObject
   
   Shared Sub Main(args() As String)

      ' Prepare to create a new application domain.
      Dim setup As New AppDomainSetup()

      ' Set the application name before setting the dynamic base.
      setup.ApplicationName = "Example"
      
      ' Set the location of the base directory where assembly resolution 
      ' probes for dynamic assemblies. Note that the hash code of the 
      ' application name is concatenated to the base directory name you 
      ' supply. 
      setup.DynamicBase = "C:\DynamicAssemblyDir"
      Console.WriteLine("DynamicBase is set to '{0}'.", setup.DynamicBase)

      Dim ad As AppDomain = AppDomain.CreateDomain("MyDomain", Nothing, setup)
      
      ' The dynamic directory name is the dynamic base concatenated with
      ' the application name: <DynamicBase>\<hash code>\<ApplicationName>
      Dim dynamicDir As String = ad.DynamicDirectory 
      Console.WriteLine("Dynamic directory is '{0}'.", dynamicDir)

      ' The AssemblyBuilder won't create this directory automatically.
      If Not System.IO.Directory.Exists(dynamicDir) Then 
         Console.WriteLine("Creating the dynamic directory.")
         System.IO.Directory.CreateDirectory(dynamicDir)
      End If

      ' Generate a dynamic assembly and store it in the dynamic 
      ' directory.
      GenerateDynamicAssembly(dynamicDir) 

      ' Create an instance of the Example class in the application domain,
      ' and call its Test method to load the dynamic assembly and use it.  
      Dim ex As Example = CType( _
         ad.CreateInstanceAndUnwrap( _
            GetType(Example).Assembly.FullName, "Example"), Example)
      ex.Test()
   End Sub

   Public Sub Test() 

      Dim dynAssem As [Assembly] = Assembly.Load(
         "DynamicHelloWorld, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null")

      Dim myType As Type = dynAssem.GetType("HelloWorld")
      myType.InvokeMember("HelloFromAD", BindingFlags.Public Or _
         BindingFlags.Static Or BindingFlags.InvokeMethod, _
         Type.DefaultBinder, Nothing, Nothing) 'New Object() {})
   End Sub


   Private Shared Sub GenerateDynamicAssembly(ByVal location As String)
      
      ' Define the dynamic assembly and the module. There is only one
      ' module in this assembly. Note that the call to DefineDynamicAssembly 
      ' specifies the location where the assembly will be saved. The 
      ' assembly version is 1.0.0.0.
      '
      Dim asmName As New AssemblyName("DynamicHelloWorld")
      asmName.Version = New Version("1.0.0.0")

      Dim ab As AssemblyBuilder = _
         AppDomain.CurrentDomain.DefineDynamicAssembly( _
            asmName, AssemblyBuilderAccess.Save, location)

      Dim moduleName As String = asmName.Name & ".dll"
      Dim mb As ModuleBuilder = ab.DefineDynamicModule(asmName.Name, moduleName)
      
      ' Define the "HelloWorld" type, with one static method.
      Dim tb As TypeBuilder = mb.DefineType("HelloWorld", TypeAttributes.Public)
      Dim hello As MethodBuilder = tb.DefineMethod("HelloFromAD", _
         MethodAttributes.Public Or MethodAttributes.Static, Nothing, Nothing)

      ' The method displays a message that contains the name of the application
      ' domain where the method is executed.
      Dim il As ILGenerator = hello.GetILGenerator()
      il.Emit(OpCodes.Ldstr, "Hello from '{0}'!")
      il.Emit(OpCodes.Call, GetType(AppDomain).GetProperty("CurrentDomain").GetGetMethod())
      il.Emit(OpCodes.Call, GetType(AppDomain).GetProperty("FriendlyName").GetGetMethod())
      il.Emit(OpCodes.Call, GetType(Console).GetMethod("WriteLine", _
                             New Type() { GetType(String), GetType(String) }))
      il.Emit(OpCodes.Ret)

      ' Complete the HelloWorld type and save the assembly. The assembly
      ' is placed in the location specified by DefineDynamicAssembly.
      Dim myType As Type = tb.CreateType()
      ab.Save(moduleName)
   End Sub
End Class 

' This example produces output similar to the following:
'
'DynamicBase is set to 'C:\DynamicAssemblyDir\5e4a7545'.
'Dynamic directory is 'C:\DynamicAssemblyDir\5e4a7545\Example'.
'Creating the dynamic directory.
'Hello from 'MyDomain'!

Comentários

Para definir o diretório dinâmico, atribua um caminho de diretório base à propriedade AppDomainSetup.DynamicBase do objeto AppDomainSetup que será usado para criar o novo domínio de aplicativo.To set the dynamic directory, assign a base directory path to the AppDomainSetup.DynamicBase property of the AppDomainSetup object that will be used to create the new application domain. O caminho do diretório base que você atribui à propriedade é modificado pela adição de um subdiretório cujo nome simples é o código hash da cadeia de caracteres que você atribui à propriedade AppDomainSetup.ApplicationName, de modo que o formato do diretório base é o caminho original\código hash.The base directory path you assign to the property is modified by the addition of a subdirectory whose simple name is the hash code of the string you assign to the AppDomainSetup.ApplicationName property, so the format of the base directory is original path\hash code. O diretório dinâmico é um subdiretório deste diretório base.The dynamic directory is a subdirectory of this base directory. Seu nome simples é o valor da propriedade AppDomainSetup.ApplicationName, portanto, seu formato é o caminho original\código hash\nome do aplicativo.Its simple name is the value of the AppDomainSetup.ApplicationName property, so its format is original path\hash code\application name.

Segurança

FileIOPermission
para acesso às informações de caminho.for access to the path information. Enumeração associada: PathDiscovery.Associated enumeration: PathDiscovery.

Aplica-se a