AppDomain.CreateInstanceAndUnwrap Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Creates a new instance of a specified type.
Overloads
CreateInstanceAndUnwrap(String, String) |
Creates a new instance of the specified type. Parameters specify the assembly where the type is defined, and the name of the type. |
CreateInstanceAndUnwrap(String, String, Object[]) |
Creates a new instance of the specified type. Parameters specify the assembly where the type is defined, the name of the type, and an array of activation attributes. |
CreateInstanceAndUnwrap(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[]) |
Creates a new instance of the specified type defined in the specified assembly, specifying whether the case of the type name is ignored; the binding attributes and the binder that are used to select the type to be created; the arguments of the constructor; the culture; and the activation attributes. |
CreateInstanceAndUnwrap(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence) |
Obsolete.
Creates a new instance of the specified type. Parameters specify the name of the type, and how it is found and created. |
CreateInstanceAndUnwrap(String, String)
- Source:
- AppDomain.cs
- Source:
- AppDomain.cs
- Source:
- AppDomain.cs
Creates a new instance of the specified type. Parameters specify the assembly where the type is defined, and the name of the type.
public:
System::Object ^ CreateInstanceAndUnwrap(System::String ^ assemblyName, System::String ^ typeName);
public object? CreateInstanceAndUnwrap (string assemblyName, string typeName);
public object CreateInstanceAndUnwrap (string assemblyName, string typeName);
member this.CreateInstanceAndUnwrap : string * string -> obj
Public Function CreateInstanceAndUnwrap (assemblyName As String, typeName As String) As Object
Parameters
- typeName
- String
The fully qualified name of the requested type, including the namespace but not the assembly, as returned by the FullName property.
Returns
An instance of the object specified by typeName
.
Exceptions
assemblyName
or typeName
is null
.
No matching public constructor was found.
typeName
was not found in assemblyName
.
assemblyName
was not found.
The caller does not have permission to call this constructor.
The operation is attempted on an unloaded application domain.
assemblyName
is not a valid assembly for the currently loaded runtime.
An assembly or module was loaded twice with two different evidences.
Examples
The following code example shows the simplest way to execute code in another application domain. The example defines a class named Worker
that inherits from MarshalByRefObject. The Worker
class defines a method that displays the name of the application domain in which it is executing. The example creates instances of Worker
in the default application domain and in a new application domain.
Note
The assembly that contains Worker
must be loaded into both application domains, but it can load other assemblies that exist only in the new application domain.
using namespace System;
using namespace System::Reflection;
public ref class Worker : MarshalByRefObject
{
public:
void PrintDomain()
{
Console::WriteLine("Object is executing in AppDomain \"{0}\"",
AppDomain::CurrentDomain->FriendlyName);
}
};
void main()
{
// Create an ordinary instance in the current AppDomain
Worker^ localWorker = gcnew Worker();
localWorker->PrintDomain();
// Create a new application domain, create an instance
// of Worker in the application domain, and execute code
// there.
AppDomain^ ad = AppDomain::CreateDomain("New domain");
Worker^ remoteWorker = (Worker^) ad->CreateInstanceAndUnwrap(
Worker::typeid->Assembly->FullName,
"Worker");
remoteWorker->PrintDomain();
}
/* This code produces output similar to the following:
Object is executing in AppDomain "source.exe"
Object is executing in AppDomain "New domain"
*/
using System;
using System.Reflection;
public class CreateInstanceWorker : MarshalByRefObject
{
public void PrintDomain()
{
Console.WriteLine("Object is executing in AppDomain \"{0}\"",
AppDomain.CurrentDomain.FriendlyName);
}
}
class CreateInstanceAndUnwrapSourceSnippet
{
public static void Main()
{
// Create an ordinary instance in the current AppDomain
CreateInstanceWorker localWorker = new CreateInstanceWorker();
localWorker.PrintDomain();
// Create a new application domain, create an instance
// of Worker in the application domain, and execute code
// there.
AppDomain ad = AppDomain.CreateDomain("New domain");
CreateInstanceWorker remoteWorker = (CreateInstanceWorker) ad.CreateInstanceAndUnwrap(
typeof(CreateInstanceWorker).Assembly.FullName,
"Worker");
remoteWorker.PrintDomain();
}
}
/* This code produces output similar to the following:
Object is executing in AppDomain "source.exe"
Object is executing in AppDomain "New domain"
*/
open System
open System.Reflection
type Worker() =
inherit MarshalByRefObject()
member _.PrintDomain() =
printfn $"Object is executing in AppDomain \"{AppDomain.CurrentDomain.FriendlyName}\""
// Create an ordinary instance in the current AppDomain
let localWorker = Worker()
localWorker.PrintDomain()
// Create a new application domain, create an instance
// of Worker in the application domain, and execute code
// there.
let ad = AppDomain.CreateDomain "New domain"
let remoteWorker =
ad.CreateInstanceAndUnwrap(typeof<Worker>.Assembly.FullName, "Worker") :?> Worker
remoteWorker.PrintDomain()
// This code produces output similar to the following:
// Object is executing in AppDomain "source.exe"
// Object is executing in AppDomain "New domain"
Imports System.Reflection
Public Class Worker
Inherits MarshalByRefObject
Public Sub PrintDomain()
Console.WriteLine("Object is executing in AppDomain ""{0}""", _
AppDomain.CurrentDomain.FriendlyName)
End Sub
End Class
Class Example
Public Shared Sub Main()
' Create an ordinary instance in the current AppDomain
Dim localWorker As New Worker()
localWorker.PrintDomain()
' Create a new application domain, create an instance
' of Worker in the application domain, and execute code
' there.
Dim ad As AppDomain = AppDomain.CreateDomain("New domain")
Dim remoteWorker As Worker = CType( _
ad.CreateInstanceAndUnwrap( _
GetType(Worker).Assembly.FullName, _
"Worker"), _
Worker)
remoteWorker.PrintDomain()
End Sub
End Class
' This code produces output similar to the following:
'
'Object is executing in AppDomain "source.exe"
'Object is executing in AppDomain "New domain"
Remarks
This is a convenience method that combines CreateInstance and ObjectHandle.Unwrap. This method calls the parameterless constructor for typeName
.
See AssemblyName for the format of assemblyName
. See the Type.FullName property for the format of typeName
.
Note
If you make an early-bound call to a method M
of an object of type T1
that was returned by CreateInstanceAndUnwrap, and that method makes an early-bound call to a method of an object of type T2
in an assembly C
other than the current assembly or the assembly containing T1
, assembly C
is loaded into the current application domain. This loading occurs even if the early-bound call to T1.M()
was made in the body of a DynamicMethod, or in other dynamically generated code. If the current domain is the default domain, assembly C
cannot be unloaded until the process ends. If the current domain later attempts to load assembly C
, the load might fail.
See also
Applies to
CreateInstanceAndUnwrap(String, String, Object[])
- Source:
- AppDomain.cs
- Source:
- AppDomain.cs
- Source:
- AppDomain.cs
Creates a new instance of the specified type. Parameters specify the assembly where the type is defined, the name of the type, and an array of activation attributes.
public:
System::Object ^ CreateInstanceAndUnwrap(System::String ^ assemblyName, System::String ^ typeName, cli::array <System::Object ^> ^ activationAttributes);
public object? CreateInstanceAndUnwrap (string assemblyName, string typeName, object?[]? activationAttributes);
public object CreateInstanceAndUnwrap (string assemblyName, string typeName, object[] activationAttributes);
member this.CreateInstanceAndUnwrap : string * string * obj[] -> obj
Public Function CreateInstanceAndUnwrap (assemblyName As String, typeName As String, activationAttributes As Object()) As Object
Parameters
- typeName
- String
The fully qualified name of the requested type, including the namespace but not the assembly, as returned by the FullName property.
- activationAttributes
- Object[]
An array of one or more attributes that can participate in activation. Typically, an array that contains a single UrlAttribute object that specifies the URL that is required to activate a remote object.
This parameter is related to client-activated objects.Client activation is a legacy technology that is retained for backward compatibility but is not recommended for new development. Distributed applications should instead use Windows Communication Foundation.
Returns
An instance of the object specified by typeName
.
Exceptions
assemblyName
or typeName
is null
.
No matching public constructor was found.
typeName
was not found in assemblyName
.
assemblyName
was not found.
The caller does not have permission to call this constructor.
The caller cannot provide activation attributes for an object that does not inherit from MarshalByRefObject.
The operation is attempted on an unloaded application domain.
assemblyName
is not a valid assembly for the currently loaded runtime.
An assembly or module was loaded twice with two different evidences.
Examples
using namespace System;
using namespace System::IO;
using namespace System::Threading;
using namespace System::Reflection;
using namespace System::Reflection::Emit;
using namespace System::Runtime::Remoting;
ref class ADDyno
{
public:
static Type^ CreateADynamicAssembly( interior_ptr<AppDomain^> myNewDomain, String^ executableNameNoExe )
{
String^ executableName = String::Concat( executableNameNoExe, ".exe" );
AssemblyName^ myAsmName = gcnew AssemblyName;
myAsmName->Name = executableNameNoExe;
myAsmName->CodeBase = Environment::CurrentDirectory;
AssemblyBuilder^ myAsmBuilder = ( *myNewDomain)->DefineDynamicAssembly( myAsmName, AssemblyBuilderAccess::RunAndSave );
Console::WriteLine( "-- Dynamic Assembly instantiated." );
ModuleBuilder^ myModBuilder = myAsmBuilder->DefineDynamicModule( executableNameNoExe, executableName );
TypeBuilder^ myTypeBuilder = myModBuilder->DefineType( executableNameNoExe, TypeAttributes::Public, MarshalByRefObject::typeid );
array<Type^>^temp0 = nullptr;
MethodBuilder^ myFCMethod = myTypeBuilder->DefineMethod( "CountLocalFiles", static_cast<MethodAttributes>(MethodAttributes::Public | MethodAttributes::Static), nullptr, temp0 );
MethodInfo^ currentDirGetMI = Environment::typeid->GetProperty( "CurrentDirectory" )->GetGetMethod();
array<Type^>^temp1 = {String::typeid};
MethodInfo^ writeLine0objMI = Console::typeid->GetMethod( "WriteLine", temp1 );
array<Type^>^temp2 = {String::typeid,Object::typeid,Object::typeid};
MethodInfo^ writeLine2objMI = Console::typeid->GetMethod( "WriteLine", temp2 );
array<Type^>^temp3 = {String::typeid};
MethodInfo^ getFilesMI = Directory::typeid->GetMethod( "GetFiles", temp3 );
myFCMethod->InitLocals = true;
ILGenerator^ myFCIL = myFCMethod->GetILGenerator();
Console::WriteLine( "-- Generating MSIL method body..." );
LocalBuilder^ v0 = myFCIL->DeclareLocal( String::typeid );
LocalBuilder^ v1 = myFCIL->DeclareLocal( int::typeid );
LocalBuilder^ v2 = myFCIL->DeclareLocal( String::typeid );
LocalBuilder^ v3 = myFCIL->DeclareLocal( array<String^>::typeid );
Label evalForEachLabel = myFCIL->DefineLabel();
Label topOfForEachLabel = myFCIL->DefineLabel();
// Build the method body.
myFCIL->EmitCall( OpCodes::Call, currentDirGetMI, nullptr );
myFCIL->Emit( OpCodes::Stloc_S, v0 );
myFCIL->Emit( OpCodes::Ldc_I4_0 );
myFCIL->Emit( OpCodes::Stloc_S, v1 );
myFCIL->Emit( OpCodes::Ldstr, "---" );
myFCIL->EmitCall( OpCodes::Call, writeLine0objMI, nullptr );
myFCIL->Emit( OpCodes::Ldloc_S, v0 );
myFCIL->EmitCall( OpCodes::Call, getFilesMI, nullptr );
myFCIL->Emit( OpCodes::Stloc_S, v3 );
myFCIL->Emit( OpCodes::Br_S, evalForEachLabel );
// foreach loop starts here.
myFCIL->MarkLabel( topOfForEachLabel );
// Load array of strings and index, store value at index for output.
myFCIL->Emit( OpCodes::Ldloc_S, v3 );
myFCIL->Emit( OpCodes::Ldloc_S, v1 );
myFCIL->Emit( OpCodes::Ldelem_Ref );
myFCIL->Emit( OpCodes::Stloc_S, v2 );
myFCIL->Emit( OpCodes::Ldloc_S, v2 );
myFCIL->EmitCall( OpCodes::Call, writeLine0objMI, nullptr );
// Increment counter by one.
myFCIL->Emit( OpCodes::Ldloc_S, v1 );
myFCIL->Emit( OpCodes::Ldc_I4_1 );
myFCIL->Emit( OpCodes::Add );
myFCIL->Emit( OpCodes::Stloc_S, v1 );
// Determine if end of file list array has been reached.
myFCIL->MarkLabel( evalForEachLabel );
myFCIL->Emit( OpCodes::Ldloc_S, v1 );
myFCIL->Emit( OpCodes::Ldloc_S, v3 );
myFCIL->Emit( OpCodes::Ldlen );
myFCIL->Emit( OpCodes::Conv_I4 );
myFCIL->Emit( OpCodes::Blt_S, topOfForEachLabel );
//foreach loop end here.
myFCIL->Emit( OpCodes::Ldstr, "---" );
myFCIL->EmitCall( OpCodes::Call, writeLine0objMI, nullptr );
myFCIL->Emit( OpCodes::Ldstr, "There are {0} files in {1}." );
myFCIL->Emit( OpCodes::Ldloc_S, v1 );
myFCIL->Emit( OpCodes::Box, int::typeid );
myFCIL->Emit( OpCodes::Ldloc_S, v0 );
myFCIL->EmitCall( OpCodes::Call, writeLine2objMI, nullptr );
myFCIL->Emit( OpCodes::Ret );
Type^ myType = myTypeBuilder->CreateType();
myAsmBuilder->SetEntryPoint( myFCMethod );
myAsmBuilder->Save( executableName );
Console::WriteLine( "-- Method generated, type completed, and assembly saved to disk." );
return myType;
}
};
int main()
{
String^ domainDir;
String^ executableName = nullptr;
Console::Write( "Enter a name for the file counting assembly: " );
String^ executableNameNoExe = Console::ReadLine();
executableName = String::Concat( executableNameNoExe, ".exe" );
Console::WriteLine( "---" );
domainDir = Environment::CurrentDirectory;
AppDomain^ curDomain = Thread::GetDomain();
// Create a new AppDomain, with the current directory as the base.
Console::WriteLine( "Current Directory: {0}", Environment::CurrentDirectory );
AppDomainSetup^ mySetupInfo = gcnew AppDomainSetup;
mySetupInfo->ApplicationBase = domainDir;
mySetupInfo->ApplicationName = executableNameNoExe;
mySetupInfo->LoaderOptimization = LoaderOptimization::SingleDomain;
AppDomain^ myDomain = AppDomain::CreateDomain( executableNameNoExe, nullptr, mySetupInfo );
Console::WriteLine( "Creating a new AppDomain '{0}'...", executableNameNoExe );
Console::WriteLine( "-- Base Directory = '{0}'", myDomain->BaseDirectory );
Console::WriteLine( "-- Shadow Copy? = '{0}'", myDomain->ShadowCopyFiles );
Console::WriteLine( "---" );
Type^ myFCType = ADDyno::CreateADynamicAssembly( &curDomain, executableNameNoExe );
Console::WriteLine( "Loading '{0}' from '{1}'...", executableName, myDomain->BaseDirectory );
BindingFlags bFlags = static_cast<BindingFlags>(BindingFlags::Public | BindingFlags::CreateInstance | BindingFlags::Instance);
Object^ myObjInstance = myDomain->CreateInstanceAndUnwrap( executableNameNoExe, executableNameNoExe, false, bFlags, nullptr, nullptr, nullptr, nullptr, nullptr );
Console::WriteLine( "Executing method 'CountLocalFiles' in {0}...", myObjInstance );
array<Object^>^temp4 = nullptr;
myFCType->InvokeMember( "CountLocalFiles", BindingFlags::InvokeMethod, nullptr, myObjInstance, temp4 );
}
using System;
using System.IO;
using System.Threading;
using System.Reflection;
using System.Reflection.Emit;
using System.Runtime.Remoting;
class ADDyno
{
public static Type CreateADynamicAssembly(ref AppDomain myNewDomain,
string executableNameNoExe)
{
string executableName = executableNameNoExe + ".exe";
AssemblyName myAsmName = new AssemblyName();
myAsmName.Name = executableNameNoExe;
myAsmName.CodeBase = Environment.CurrentDirectory;
AssemblyBuilder myAsmBuilder = myNewDomain.DefineDynamicAssembly(myAsmName,
AssemblyBuilderAccess.RunAndSave);
Console.WriteLine("-- Dynamic Assembly instantiated.");
ModuleBuilder myModBuilder = myAsmBuilder.DefineDynamicModule(executableNameNoExe,
executableName);
TypeBuilder myTypeBuilder = myModBuilder.DefineType(executableNameNoExe,
TypeAttributes.Public,
typeof(MarshalByRefObject));
MethodBuilder myFCMethod = myTypeBuilder.DefineMethod("CountLocalFiles",
MethodAttributes.Public |
MethodAttributes.Static,
null,
new Type[] { });
MethodInfo currentDirGetMI = typeof(Environment).GetProperty("CurrentDirectory").GetGetMethod();
MethodInfo writeLine0objMI = typeof(Console).GetMethod("WriteLine",
new Type[] { typeof(string) });
MethodInfo writeLine2objMI = typeof(Console).GetMethod("WriteLine",
new Type[] { typeof(string), typeof(object), typeof(object) });
MethodInfo getFilesMI = typeof(Directory).GetMethod("GetFiles",
new Type[] { typeof(string) });
myFCMethod.InitLocals = true;
ILGenerator myFCIL = myFCMethod.GetILGenerator();
Console.WriteLine("-- Generating MSIL method body...");
LocalBuilder v0 = myFCIL.DeclareLocal(typeof(string));
LocalBuilder v1 = myFCIL.DeclareLocal(typeof(int));
LocalBuilder v2 = myFCIL.DeclareLocal(typeof(string));
LocalBuilder v3 = myFCIL.DeclareLocal(typeof(string[]));
Label evalForEachLabel = myFCIL.DefineLabel();
Label topOfForEachLabel = myFCIL.DefineLabel();
// Build the method body.
myFCIL.EmitCall(OpCodes.Call, currentDirGetMI, null);
myFCIL.Emit(OpCodes.Stloc_S, v0);
myFCIL.Emit(OpCodes.Ldc_I4_0);
myFCIL.Emit(OpCodes.Stloc_S, v1);
myFCIL.Emit(OpCodes.Ldstr, "---");
myFCIL.EmitCall(OpCodes.Call, writeLine0objMI, null);
myFCIL.Emit(OpCodes.Ldloc_S, v0);
myFCIL.EmitCall(OpCodes.Call, getFilesMI, null);
myFCIL.Emit(OpCodes.Stloc_S, v3);
myFCIL.Emit(OpCodes.Br_S, evalForEachLabel);
// foreach loop starts here.
myFCIL.MarkLabel(topOfForEachLabel);
// Load array of strings and index, store value at index for output.
myFCIL.Emit(OpCodes.Ldloc_S, v3);
myFCIL.Emit(OpCodes.Ldloc_S, v1);
myFCIL.Emit(OpCodes.Ldelem_Ref);
myFCIL.Emit(OpCodes.Stloc_S, v2);
myFCIL.Emit(OpCodes.Ldloc_S, v2);
myFCIL.EmitCall(OpCodes.Call, writeLine0objMI, null);
// Increment counter by one.
myFCIL.Emit(OpCodes.Ldloc_S, v1);
myFCIL.Emit(OpCodes.Ldc_I4_1);
myFCIL.Emit(OpCodes.Add);
myFCIL.Emit(OpCodes.Stloc_S, v1);
// Determine if end of file list array has been reached.
myFCIL.MarkLabel(evalForEachLabel);
myFCIL.Emit(OpCodes.Ldloc_S, v1);
myFCIL.Emit(OpCodes.Ldloc_S, v3);
myFCIL.Emit(OpCodes.Ldlen);
myFCIL.Emit(OpCodes.Conv_I4);
myFCIL.Emit(OpCodes.Blt_S, topOfForEachLabel);
//foreach loop end here.
myFCIL.Emit(OpCodes.Ldstr, "---");
myFCIL.EmitCall(OpCodes.Call, writeLine0objMI, null);
myFCIL.Emit(OpCodes.Ldstr, "There are {0} files in {1}.");
myFCIL.Emit(OpCodes.Ldloc_S, v1);
myFCIL.Emit(OpCodes.Box, typeof(int));
myFCIL.Emit(OpCodes.Ldloc_S, v0);
myFCIL.EmitCall(OpCodes.Call, writeLine2objMI, null);
myFCIL.Emit(OpCodes.Ret);
Type myType = myTypeBuilder.CreateType();
myAsmBuilder.SetEntryPoint(myFCMethod);
myAsmBuilder.Save(executableName);
Console.WriteLine("-- Method generated, type completed, and assembly saved to disk.");
return myType;
}
public static void Main()
{
string domainDir, executableName = null;
Console.Write("Enter a name for the file counting assembly: ");
string executableNameNoExe = Console.ReadLine();
executableName = executableNameNoExe + ".exe";
Console.WriteLine("---");
domainDir = Environment.CurrentDirectory;
AppDomain curDomain = Thread.GetDomain();
// Create a new AppDomain, with the current directory as the base.
Console.WriteLine("Current Directory: {0}", Environment.CurrentDirectory);
AppDomainSetup mySetupInfo = new AppDomainSetup();
mySetupInfo.ApplicationBase = domainDir;
mySetupInfo.ApplicationName = executableNameNoExe;
mySetupInfo.LoaderOptimization = LoaderOptimization.SingleDomain;
AppDomain myDomain = AppDomain.CreateDomain(executableNameNoExe,
null, mySetupInfo);
Console.WriteLine("Creating a new AppDomain '{0}'...",
executableNameNoExe);
Console.WriteLine("-- Base Directory = '{0}'", myDomain.BaseDirectory);
Console.WriteLine("-- Shadow Copy? = '{0}'", myDomain.ShadowCopyFiles);
Console.WriteLine("---");
Type myFCType = CreateADynamicAssembly(ref curDomain,
executableNameNoExe);
Console.WriteLine("Loading '{0}' from '{1}'...", executableName,
myDomain.BaseDirectory.ToString());
BindingFlags bFlags = (BindingFlags.Public | BindingFlags.CreateInstance |
BindingFlags.Instance);
Object myObjInstance = myDomain.CreateInstanceAndUnwrap(executableNameNoExe,
executableNameNoExe, false, bFlags,
null, null, null, null, null);
Console.WriteLine("Executing method 'CountLocalFiles' in {0}...",
myObjInstance.ToString());
myFCType.InvokeMember("CountLocalFiles", BindingFlags.InvokeMethod, null,
myObjInstance, new object[] { });
}
}
open System
open System.IO
open System.Threading
open System.Reflection
open System.Reflection.Emit
let createADynamicAssembly (myNewDomain: byref<AppDomain>) executableNameNoExe =
let executableName = executableNameNoExe + ".exe"
let myAsmName = AssemblyName()
myAsmName.Name <- executableNameNoExe
myAsmName.CodeBase <- Environment.CurrentDirectory
let myAsmBuilder =
myNewDomain.DefineDynamicAssembly(myAsmName, AssemblyBuilderAccess.RunAndSave)
printfn "-- Dynamic Assembly instantiated."
let myModBuilder =
myAsmBuilder.DefineDynamicModule(executableNameNoExe, executableName)
let myTypeBuilder =
myModBuilder.DefineType(executableNameNoExe,
TypeAttributes.Public,
typeof<MarshalByRefObject>)
let myFCMethod =
myTypeBuilder.DefineMethod("CountLocalFiles",
MethodAttributes.Public |||
MethodAttributes.Static,
null,
[||])
let currentDirGetMI = typeof<Environment>.GetProperty("CurrentDirectory").GetGetMethod()
let writeLine0objMI = typeof<Console>.GetMethod("WriteLine", [| typeof<string> |])
let writeLine2objMI = typeof<Console>.GetMethod("WriteLine", [| typeof<string>; typeof<obj>; typeof<obj> |])
let getFilesMI = typeof<Directory>.GetMethod("GetFiles", [| typeof<string> |])
myFCMethod.InitLocals <- true
let myFCIL = myFCMethod.GetILGenerator()
printfn "-- Generating MSIL method body..."
let v0 = myFCIL.DeclareLocal typeof<string>
let v1 = myFCIL.DeclareLocal typeof<int>
let v2 = myFCIL.DeclareLocal typeof<string>
let v3 = myFCIL.DeclareLocal typeof<string[]>
let evalForEachLabel = myFCIL.DefineLabel()
let topOfForEachLabel = myFCIL.DefineLabel()
// Build the method body.
myFCIL.EmitCall(OpCodes.Call, currentDirGetMI, null)
myFCIL.Emit(OpCodes.Stloc_S, v0)
myFCIL.Emit(OpCodes.Ldc_I4_0)
myFCIL.Emit(OpCodes.Stloc_S, v1)
myFCIL.Emit(OpCodes.Ldstr, "---")
myFCIL.EmitCall(OpCodes.Call, writeLine0objMI, null)
myFCIL.Emit(OpCodes.Ldloc_S, v0)
myFCIL.EmitCall(OpCodes.Call, getFilesMI, null)
myFCIL.Emit(OpCodes.Stloc_S, v3)
myFCIL.Emit(OpCodes.Br_S, evalForEachLabel)
// foreach loop starts here.
myFCIL.MarkLabel topOfForEachLabel
// Load array of strings and index, store value at index for output.
myFCIL.Emit(OpCodes.Ldloc_S, v3)
myFCIL.Emit(OpCodes.Ldloc_S, v1)
myFCIL.Emit OpCodes.Ldelem_Ref
myFCIL.Emit(OpCodes.Stloc_S, v2)
myFCIL.Emit(OpCodes.Ldloc_S, v2)
myFCIL.EmitCall(OpCodes.Call, writeLine0objMI, null)
// Increment counter by one.
myFCIL.Emit(OpCodes.Ldloc_S, v1)
myFCIL.Emit(OpCodes.Ldc_I4_1)
myFCIL.Emit OpCodes.Add
myFCIL.Emit(OpCodes.Stloc_S, v1)
// Determine if end of file list array has been reached.
myFCIL.MarkLabel evalForEachLabel
myFCIL.Emit(OpCodes.Ldloc_S, v1)
myFCIL.Emit(OpCodes.Ldloc_S, v3)
myFCIL.Emit OpCodes.Ldlen
myFCIL.Emit OpCodes.Conv_I4
myFCIL.Emit(OpCodes.Blt_S, topOfForEachLabel)
//foreach loop end here.
myFCIL.Emit(OpCodes.Ldstr, "---")
myFCIL.EmitCall(OpCodes.Call, writeLine0objMI, null)
myFCIL.Emit(OpCodes.Ldstr, "There are {0} files in {1}.")
myFCIL.Emit(OpCodes.Ldloc_S, v1)
myFCIL.Emit(OpCodes.Box, typeof<int>)
myFCIL.Emit(OpCodes.Ldloc_S, v0)
myFCIL.EmitCall(OpCodes.Call, writeLine2objMI, null)
myFCIL.Emit OpCodes.Ret
let myType = myTypeBuilder.CreateType()
myAsmBuilder.SetEntryPoint myFCMethod
myAsmBuilder.Save executableName
printfn "-- Method generated, type completed, and assembly saved to disk."
myType
printf "Enter a name for the file counting assembly: "
let executableNameNoExe = stdin.ReadLine()
let executableName = executableNameNoExe + ".exe"
printfn "---"
let domainDir = Environment.CurrentDirectory
let mutable curDomain = Thread.GetDomain()
// Create a new AppDomain, with the current directory as the base.
printfn $"Current Directory: {Environment.CurrentDirectory}"
let mySetupInfo = AppDomainSetup()
mySetupInfo.ApplicationBase <- domainDir
mySetupInfo.ApplicationName <- executableNameNoExe
mySetupInfo.LoaderOptimization <- LoaderOptimization.SingleDomain
let myDomain =
AppDomain.CreateDomain(executableNameNoExe, null, mySetupInfo)
printfn $"Creating a new AppDomain '{executableNameNoExe}'..."
printfn $"-- Base Directory = '{myDomain.BaseDirectory}'"
printfn $"-- Shadow Copy? = '{myDomain.ShadowCopyFiles}'"
printfn "---"
let myFCType =
createADynamicAssembly &curDomain executableNameNoExe
printfn $"Loading '{executableName}' from '{myDomain.BaseDirectory}'..."
let bFlags =
BindingFlags.Public ||| BindingFlags.CreateInstance ||| BindingFlags.Instance
let myObjInstance =
myDomain.CreateInstanceAndUnwrap(executableNameNoExe,
executableNameNoExe, false, bFlags,
null, null, null, null, null)
printfn $"Executing method 'CountLocalFiles' in {myObjInstance}..."
myFCType.InvokeMember("CountLocalFiles", BindingFlags.InvokeMethod, null, myObjInstance, [||])
Imports System.IO
Imports System.Threading
Imports System.Reflection
Imports System.Reflection.Emit
Imports System.Runtime.Remoting
Class ADDyno
Public Shared Function CreateADynamicAssembly(ByRef myNewDomain As AppDomain, executableNameNoExe As String) As Type
Dim executableName As String = executableNameNoExe + ".exe"
Dim myAsmName As New AssemblyName()
myAsmName.Name = executableNameNoExe
myAsmName.CodeBase = Environment.CurrentDirectory
Dim myAsmBuilder As AssemblyBuilder = myNewDomain.DefineDynamicAssembly(myAsmName, AssemblyBuilderAccess.RunAndSave)
Console.WriteLine("-- Dynamic Assembly instantiated.")
Dim myModBuilder As ModuleBuilder = myAsmBuilder.DefineDynamicModule(executableNameNoExe, executableName)
Dim myTypeBuilder As TypeBuilder = myModBuilder.DefineType(executableNameNoExe, TypeAttributes.Public, GetType(MarshalByRefObject))
Dim myFCMethod As MethodBuilder = myTypeBuilder.DefineMethod("CountLocalFiles", MethodAttributes.Public Or MethodAttributes.Static, Nothing, New Type() {})
Dim currentDirGetMI As MethodInfo = GetType(Environment).GetProperty("CurrentDirectory").GetGetMethod()
Dim writeLine0objMI As MethodInfo = GetType(Console).GetMethod("WriteLine", New Type() {GetType(String)})
Dim writeLine2objMI As MethodInfo = GetType(Console).GetMethod("WriteLine", New Type() {GetType(String), GetType(Object), GetType(Object)})
Dim getFilesMI As MethodInfo = GetType(Directory).GetMethod("GetFiles", New Type() {GetType(String)})
myFCMethod.InitLocals = True
Dim myFCIL As ILGenerator = myFCMethod.GetILGenerator()
Console.WriteLine("-- Generating MSIL method body...")
Dim v0 As LocalBuilder = myFCIL.DeclareLocal(GetType(String))
Dim v1 As LocalBuilder = myFCIL.DeclareLocal(GetType(Integer))
Dim v2 As LocalBuilder = myFCIL.DeclareLocal(GetType(String))
Dim v3 As LocalBuilder = myFCIL.DeclareLocal(GetType(String()))
Dim evalForEachLabel As Label = myFCIL.DefineLabel()
Dim topOfForEachLabel As Label = myFCIL.DefineLabel()
' Build the method body.
myFCIL.EmitCall(OpCodes.Call, currentDirGetMI, Nothing)
myFCIL.Emit(OpCodes.Stloc_S, v0)
myFCIL.Emit(OpCodes.Ldc_I4_0)
myFCIL.Emit(OpCodes.Stloc_S, v1)
myFCIL.Emit(OpCodes.Ldstr, "---")
myFCIL.EmitCall(OpCodes.Call, writeLine0objMI, Nothing)
myFCIL.Emit(OpCodes.Ldloc_S, v0)
myFCIL.EmitCall(OpCodes.Call, getFilesMI, Nothing)
myFCIL.Emit(OpCodes.Stloc_S, v3)
myFCIL.Emit(OpCodes.Br_S, evalForEachLabel)
' foreach loop starts here.
myFCIL.MarkLabel(topOfForEachLabel)
' Load array of strings and index, store value at index for output.
myFCIL.Emit(OpCodes.Ldloc_S, v3)
myFCIL.Emit(OpCodes.Ldloc_S, v1)
myFCIL.Emit(OpCodes.Ldelem_Ref)
myFCIL.Emit(OpCodes.Stloc_S, v2)
myFCIL.Emit(OpCodes.Ldloc_S, v2)
myFCIL.EmitCall(OpCodes.Call, writeLine0objMI, Nothing)
' Increment counter by one.
myFCIL.Emit(OpCodes.Ldloc_S, v1)
myFCIL.Emit(OpCodes.Ldc_I4_1)
myFCIL.Emit(OpCodes.Add)
myFCIL.Emit(OpCodes.Stloc_S, v1)
' Determine if end of file list array has been reached.
myFCIL.MarkLabel(evalForEachLabel)
myFCIL.Emit(OpCodes.Ldloc_S, v1)
myFCIL.Emit(OpCodes.Ldloc_S, v3)
myFCIL.Emit(OpCodes.Ldlen)
myFCIL.Emit(OpCodes.Conv_I4)
myFCIL.Emit(OpCodes.Blt_S, topOfForEachLabel)
'foreach loop end here.
myFCIL.Emit(OpCodes.Ldstr, "---")
myFCIL.EmitCall(OpCodes.Call, writeLine0objMI, Nothing)
myFCIL.Emit(OpCodes.Ldstr, "There are {0} files in {1}.")
myFCIL.Emit(OpCodes.Ldloc_S, v1)
myFCIL.Emit(OpCodes.Box, GetType(Integer))
myFCIL.Emit(OpCodes.Ldloc_S, v0)
myFCIL.EmitCall(OpCodes.Call, writeLine2objMI, Nothing)
myFCIL.Emit(OpCodes.Ret)
Dim myType As Type = myTypeBuilder.CreateType()
myAsmBuilder.SetEntryPoint(myFCMethod)
myAsmBuilder.Save(executableName)
Console.WriteLine("-- Method generated, type completed, and assembly saved to disk.")
Return myType
End Function 'CreateADynamicAssembly
Public Shared Sub Main()
Dim executableName As String = Nothing
Dim domainDir As String
Console.Write("Enter a name for the file counting assembly: ")
Dim executableNameNoExe As String = Console.ReadLine()
executableName = executableNameNoExe + ".exe"
Console.WriteLine("---")
domainDir = Environment.CurrentDirectory
Dim curDomain As AppDomain = Thread.GetDomain()
' Create a new AppDomain, with the current directory as the base.
Console.WriteLine("Current Directory: {0}", Environment.CurrentDirectory)
Dim mySetupInfo As New AppDomainSetup()
mySetupInfo.ApplicationBase = domainDir
mySetupInfo.ApplicationName = executableNameNoExe
mySetupInfo.LoaderOptimization = LoaderOptimization.SingleDomain
Dim myDomain As AppDomain = AppDomain.CreateDomain(executableNameNoExe, Nothing, mySetupInfo)
Console.WriteLine("Creating a new AppDomain '{0}'...", executableNameNoExe)
Console.WriteLine("-- Base Directory = '{0}'", myDomain.BaseDirectory)
Console.WriteLine("-- Shadow Copy? = '{0}'", myDomain.ShadowCopyFiles)
Console.WriteLine("---")
Dim myFCType As Type = CreateADynamicAssembly(curDomain, executableNameNoExe)
Console.WriteLine("Loading '{0}' from '{1}'...", executableName, myDomain.BaseDirectory.ToString())
Dim bFlags As BindingFlags = BindingFlags.Public Or BindingFlags.CreateInstance Or BindingFlags.Instance
Dim myObjInstance As [Object] = myDomain.CreateInstanceAndUnwrap(executableNameNoExe, executableNameNoExe, False, bFlags, Nothing, Nothing, Nothing, Nothing, Nothing)
Console.WriteLine("Executing method 'CountLocalFiles' in {0}...", myObjInstance.ToString())
myFCType.InvokeMember("CountLocalFiles", BindingFlags.InvokeMethod, Nothing, myObjInstance, New Object() {})
End Sub
End Class
Remarks
This is a convenience method that combines CreateInstance and ObjectHandle.Unwrap. This method calls the parameterless constructor for typeName
.
See AssemblyName for the format of assemblyName
. See the Type.FullName property for the format of typeName
.
Note
If you make an early-bound call to a method M
of an object of type T1
that was returned by CreateInstanceAndUnwrap, and that method makes an early-bound call to a method of an object of type T2
in an assembly C
other than the current assembly or the assembly containing T1
, assembly C
is loaded into the current application domain. This loading occurs even if the early-bound call to T1.M()
was made in the body of a DynamicMethod, or in other dynamically generated code. If the current domain is the default domain, assembly C
cannot be unloaded until the process ends. If the current domain later attempts to load assembly C
, the load might fail.
See also
Applies to
CreateInstanceAndUnwrap(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[])
- Source:
- AppDomain.cs
- Source:
- AppDomain.cs
- Source:
- AppDomain.cs
Creates a new instance of the specified type defined in the specified assembly, specifying whether the case of the type name is ignored; the binding attributes and the binder that are used to select the type to be created; the arguments of the constructor; the culture; and the activation attributes.
public:
System::Object ^ CreateInstanceAndUnwrap(System::String ^ assemblyName, System::String ^ typeName, bool ignoreCase, System::Reflection::BindingFlags bindingAttr, System::Reflection::Binder ^ binder, cli::array <System::Object ^> ^ args, System::Globalization::CultureInfo ^ culture, cli::array <System::Object ^> ^ activationAttributes);
public object? CreateInstanceAndUnwrap (string assemblyName, string typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder? binder, object?[]? args, System.Globalization.CultureInfo? culture, object?[]? activationAttributes);
public object CreateInstanceAndUnwrap (string assemblyName, string typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes);
member this.CreateInstanceAndUnwrap : string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] -> obj
Public Function CreateInstanceAndUnwrap (assemblyName As String, typeName As String, ignoreCase As Boolean, bindingAttr As BindingFlags, binder As Binder, args As Object(), culture As CultureInfo, activationAttributes As Object()) As Object
Parameters
- typeName
- String
The fully qualified name of the requested type, including the namespace but not the assembly, as returned by the FullName property.
- ignoreCase
- Boolean
A Boolean value specifying whether to perform a case-sensitive search or not.
- bindingAttr
- BindingFlags
A combination of zero or more bit flags that affect the search for the typeName
constructor. If bindingAttr
is zero, a case-sensitive search for public constructors is conducted.
- binder
- Binder
An object that enables the binding, coercion of argument types, invocation of members, and retrieval of MemberInfo objects using reflection. If binder
is null, the default binder is used.
- args
- Object[]
The arguments to pass to the constructor. This array of arguments must match in number, order, and type the parameters of the constructor to invoke. If the parameterless constructor is preferred, args
must be an empty array or null.
- culture
- CultureInfo
A culture-specific object used to govern the coercion of types. If culture
is null
, the CultureInfo
for the current thread is used.
- activationAttributes
- Object[]
An array of one or more attributes that can participate in activation. Typically, an array that contains a single UrlAttribute object. that specifies the URL that is required to activate a remote object.
This parameter is related to client-activated objects. Client activation is a legacy technology that is retained for backward compatibility but is not recommended for new development. Distributed applications should instead use Windows Communication Foundation.
Returns
An instance of the object specified by typeName
.
Exceptions
assemblyName
or typeName
is null
.
No matching constructor was found.
typeName
was not found in assemblyName
.
assemblyName
was not found.
The caller does not have permission to call this constructor.
The caller cannot provide activation attributes for an object that does not inherit from MarshalByRefObject.
The operation is attempted on an unloaded application domain.
assemblyName
is not a valid assembly for the currently loaded runtime.
An assembly or module was loaded twice with two different evidences.
Examples
The following sample demonstrates the use of the ignoreCase
parameter.
using namespace System;
using namespace System::Reflection;
static void InstantiateINT32( bool ignoreCase )
{
try
{
AppDomain^ currentDomain = AppDomain::CurrentDomain;
Object^ instance = currentDomain->CreateInstanceAndUnwrap(
"mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089",
"SYSTEM.INT32",
ignoreCase,
BindingFlags::Default,
nullptr,
nullptr,
nullptr,
nullptr,
nullptr );
Console::WriteLine( instance->GetType() );
}
catch ( TypeLoadException^ e )
{
Console::WriteLine( e->Message );
}
}
int main()
{
InstantiateINT32( false ); // Failed!
InstantiateINT32( true ); // OK!
}
using System;
using System.Reflection;
class IgnoreCaseSnippet {
static void Main() {
InstantiateINT32(false); // Failed!
InstantiateINT32(true); // OK!
}
static void InstantiateINT32(bool ignoreCase) {
try {
AppDomain currentDomain = AppDomain.CurrentDomain;
object instance = currentDomain.CreateInstanceAndUnwrap(
"mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089",
"SYSTEM.INT32",
ignoreCase,
BindingFlags.Default,
null,
null,
null,
null,
null
);
Console.WriteLine(instance.GetType());
} catch (TypeLoadException e) {
Console.WriteLine(e.Message);
}
}
}
open System
open System.Reflection
let instantiateINT32 ignoreCase =
try
let currentDomain = AppDomain.CurrentDomain
let instance = currentDomain.CreateInstanceAndUnwrap(
"mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089",
"SYSTEM.INT32",
ignoreCase,
BindingFlags.Default,
null,
null,
null,
null,
null)
printfn $"{instance.GetType()}"
with :? TypeLoadException as e ->
printfn $"{e.Message}"
instantiateINT32 false // Failed!
instantiateINT32 true // OK!
Imports System.Reflection
Module Test
Sub Main()
InstantiateINT32(False) ' Failed!
InstantiateINT32(True) ' OK!
End Sub
Sub InstantiateINT32(ignoreCase As Boolean)
Try
Dim currentDomain As AppDomain = AppDomain.CurrentDomain
Dim instance As Object = currentDomain.CreateInstanceAndUnwrap( _
"mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089", _
"SYSTEM.INT32", _
ignoreCase, _
BindingFlags.Default, _
Nothing, _
Nothing, _
Nothing, _
Nothing, _
Nothing _
)
Console.WriteLine(instance.GetType())
Catch e As TypeLoadException
Console.WriteLine(e.Message)
End Try
End Sub
End Module 'Test
Remarks
This is a convenience method that combines CreateInstance and ObjectHandle.Unwrap.
See AssemblyName for the format of assemblyName
. See the Type.FullName property for the format of typeName
.
Note
If you make an early-bound call to a method M
of an object of type T1
that was returned by CreateInstanceAndUnwrap, and that method makes an early-bound call to a method of an object of type T2
in an assembly C
other than the current assembly or the assembly containing T1
, assembly C
is loaded into the current application domain. This loading occurs even if the early-bound call to T1.M()
was made in the body of a DynamicMethod, or in other dynamically generated code. If the current domain is the default domain, assembly C
cannot be unloaded until the process ends. If the current domain later attempts to load assembly C
, the load might fail.
See also
Applies to
CreateInstanceAndUnwrap(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)
Caution
Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of CreateInstanceAndUnwrap which does not take an Evidence parameter. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.
Creates a new instance of the specified type. Parameters specify the name of the type, and how it is found and created.
public:
System::Object ^ CreateInstanceAndUnwrap(System::String ^ assemblyName, System::String ^ typeName, bool ignoreCase, System::Reflection::BindingFlags bindingAttr, System::Reflection::Binder ^ binder, cli::array <System::Object ^> ^ args, System::Globalization::CultureInfo ^ culture, cli::array <System::Object ^> ^ activationAttributes, System::Security::Policy::Evidence ^ securityAttributes);
public object CreateInstanceAndUnwrap (string assemblyName, string typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes, System.Security.Policy.Evidence securityAttributes);
[System.Obsolete("Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of CreateInstanceAndUnwrap which does not take an Evidence parameter. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.")]
public object CreateInstanceAndUnwrap (string assemblyName, string typeName, bool ignoreCase, System.Reflection.BindingFlags bindingAttr, System.Reflection.Binder binder, object[] args, System.Globalization.CultureInfo culture, object[] activationAttributes, System.Security.Policy.Evidence securityAttributes);
member this.CreateInstanceAndUnwrap : string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] * System.Security.Policy.Evidence -> obj
[<System.Obsolete("Methods which use evidence to sandbox are obsolete and will be removed in a future release of the .NET Framework. Please use an overload of CreateInstanceAndUnwrap which does not take an Evidence parameter. See http://go.microsoft.com/fwlink/?LinkID=155570 for more information.")>]
member this.CreateInstanceAndUnwrap : string * string * bool * System.Reflection.BindingFlags * System.Reflection.Binder * obj[] * System.Globalization.CultureInfo * obj[] * System.Security.Policy.Evidence -> obj
Public Function CreateInstanceAndUnwrap (assemblyName As String, typeName As String, ignoreCase As Boolean, bindingAttr As BindingFlags, binder As Binder, args As Object(), culture As CultureInfo, activationAttributes As Object(), securityAttributes As Evidence) As Object
Parameters
- typeName
- String
The fully qualified name of the requested type, including the namespace but not the assembly, as returned by the FullName property.
- ignoreCase
- Boolean
A Boolean value specifying whether to perform a case-sensitive search or not.
- bindingAttr
- BindingFlags
A combination of zero or more bit flags that affect the search for the typeName
constructor. If bindingAttr
is zero, a case-sensitive search for public constructors is conducted.
- binder
- Binder
An object that enables the binding, coercion of argument types, invocation of members, and retrieval of MemberInfo objects using reflection. If binder
is null, the default binder is used.
- args
- Object[]
The arguments to pass to the constructor. This array of arguments must match in number, order, and type the parameters of the constructor to invoke. If the parameterless constructor is preferred, args
must be an empty array or null.
- culture
- CultureInfo
A culture-specific object used to govern the coercion of types. If culture
is null
, the CultureInfo
for the current thread is used.
- activationAttributes
- Object[]
An array of one or more attributes that can participate in activation. Typically, an array that contains a single UrlAttribute object that specifies the URL that is required to activate a remote object.
This parameter is related to client-activated objects. Client activation is a legacy technology that is retained for backward compatibility but is not recommended for new development. Distributed applications should instead use Windows Communication Foundation.
- securityAttributes
- Evidence
Information used to authorize creation of typeName
.
Returns
An instance of the object specified by typeName
.
- Attributes
Exceptions
assemblyName
or typeName
is null
.
No matching constructor was found.
typeName
was not found in assemblyName
.
assemblyName
was not found.
The caller does not have permission to call this constructor.
The caller cannot provide activation attributes for an object that does not inherit from MarshalByRefObject.
The operation is attempted on an unloaded application domain.
assemblyName
is not a valid assembly for the currently loaded runtime.
An assembly or module was loaded twice with two different evidences.
Examples
The following sample demonstrates the use of the ignoreCase
parameter.
using namespace System;
using namespace System::Reflection;
static void InstantiateINT32( bool ignoreCase )
{
try
{
AppDomain^ currentDomain = AppDomain::CurrentDomain;
Object^ instance = currentDomain->CreateInstanceAndUnwrap(
"mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089",
"SYSTEM.INT32",
ignoreCase,
BindingFlags::Default,
nullptr,
nullptr,
nullptr,
nullptr,
nullptr );
Console::WriteLine( instance->GetType() );
}
catch ( TypeLoadException^ e )
{
Console::WriteLine( e->Message );
}
}
int main()
{
InstantiateINT32( false ); // Failed!
InstantiateINT32( true ); // OK!
}
using System;
using System.Reflection;
class IgnoreCaseSnippet {
static void Main() {
InstantiateINT32(false); // Failed!
InstantiateINT32(true); // OK!
}
static void InstantiateINT32(bool ignoreCase) {
try {
AppDomain currentDomain = AppDomain.CurrentDomain;
object instance = currentDomain.CreateInstanceAndUnwrap(
"mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089",
"SYSTEM.INT32",
ignoreCase,
BindingFlags.Default,
null,
null,
null,
null,
null
);
Console.WriteLine(instance.GetType());
} catch (TypeLoadException e) {
Console.WriteLine(e.Message);
}
}
}
open System
open System.Reflection
let instantiateINT32 ignoreCase =
try
let currentDomain = AppDomain.CurrentDomain
let instance = currentDomain.CreateInstanceAndUnwrap(
"mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089",
"SYSTEM.INT32",
ignoreCase,
BindingFlags.Default,
null,
null,
null,
null,
null)
printfn $"{instance.GetType()}"
with :? TypeLoadException as e ->
printfn $"{e.Message}"
instantiateINT32 false // Failed!
instantiateINT32 true // OK!
Imports System.Reflection
Module Test
Sub Main()
InstantiateINT32(False) ' Failed!
InstantiateINT32(True) ' OK!
End Sub
Sub InstantiateINT32(ignoreCase As Boolean)
Try
Dim currentDomain As AppDomain = AppDomain.CurrentDomain
Dim instance As Object = currentDomain.CreateInstanceAndUnwrap( _
"mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089", _
"SYSTEM.INT32", _
ignoreCase, _
BindingFlags.Default, _
Nothing, _
Nothing, _
Nothing, _
Nothing, _
Nothing _
)
Console.WriteLine(instance.GetType())
Catch e As TypeLoadException
Console.WriteLine(e.Message)
End Try
End Sub
End Module 'Test
Remarks
This is a convenience method that combines CreateInstance and ObjectHandle.Unwrap.
See AssemblyName for the format of assemblyName
. See the Type.FullName property for the format of typeName
.
Note
If you make an early-bound call to a method M
of an object of type T1
that was returned by CreateInstanceAndUnwrap, and that method makes an early-bound call to a method of an object of type T2
in an assembly C
other than the current assembly or the assembly containing T1
, assembly C
is loaded into the current application domain. This loading occurs even if the early-bound call to T1.M()
was made in the body of a DynamicMethod, or in other dynamically generated code. If the current domain is the default domain, assembly C
cannot be unloaded until the process ends. If the current domain later attempts to load assembly C
, the load might fail.
See also
Applies to
Feedback
https://aka.ms/ContentUserFeedback.
Binnenkort: Gedurende 2024 worden GitHub Issues uitgefaseerd als het feedbackmechanisme voor inhoud. Dit wordt vervangen door een nieuw feedbacksysteem. Ga voor meer informatie naar:Feedback verzenden en bekijken voor