AppDomain.CreateInstanceAndUnwrap 方法
定義
重要
部分資訊涉及發行前產品,在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊,不做任何明確或隱含的瑕疵擔保。
建立指定類型的新執行個體。
多載
CreateInstanceAndUnwrap(String, String) |
建立指定類型的新執行個體。 參數會指定定義類型所在的組件和類型的名稱。 |
CreateInstanceAndUnwrap(String, String, Object[]) |
建立指定類型的新執行個體。 參數會指定定義類型所在的組件、類型的名稱和啟動屬性的陣列。 |
CreateInstanceAndUnwrap(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[]) |
藉由指定是否忽略類型名稱的大小寫、用於選取要建立之類型的繫結屬性和繫結器、建構函式的引數、文化特性,以及啟動屬性,為指定之組件中定義的指定類型,建立新的執行個體。 |
CreateInstanceAndUnwrap(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence) |
已淘汰.
建立指定類型的新執行個體。 參數會指定類型的名稱,以及如何尋找和建立它。 |
CreateInstanceAndUnwrap(String, String)
- 來源:
- AppDomain.cs
- 來源:
- AppDomain.cs
- 來源:
- AppDomain.cs
建立指定類型的新執行個體。 參數會指定定義類型所在的組件和類型的名稱。
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
參數
傳回
typeName
指定之物件的執行個體。
例外狀況
assemblyName
或 typeName
為 null
。
找不到相符的公用建構函式。
在 assemblyName
中找不到 typename
。
找不到 assemblyName
。
呼叫端沒有呼叫這個建構函式的權限。
嘗試對卸載的應用程式定義域執行作業。
assemblyName
不是目前載入運行時間的有效元件。
使用兩個不同的辨識項載入組件或模組兩次。
範例
下列程式代碼範例示範在另一個應用程式域中執行程序代碼的最簡單方式。 這個範例會定義名為 Worker
的類別,該類別繼承自 MarshalByRefObject。 類別 Worker
會定義方法,以顯示其執行所在的應用程式域名稱。 此範例會在預設應用程式域和新應用程式域中建立的實例 Worker
。
注意
包含的 Worker
元件必須載入這兩個應用程式域,但它可以載入其他只存在於新應用程式域中的元件。
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"
備註
這是結合 CreateInstance 和 ObjectHandle.Unwrap的便利方法。 這個方法會呼叫的 typeName
無參數建構函式。
如需的格式,assemblyName
請參閱 AssemblyName 。 Type.FullName如需 的格式typeName
,請參閱 屬性。
注意
如果您對 所傳回之型T1
別物件的方法M
進行早期綁定呼叫,而且該方法會對目前元件或包含T1
之元件C
中類型T2
之物件的方法進行早期系結呼叫,則元件C
會載入至目前的應用程式域。CreateInstanceAndUnwrap 即使 的早期系結呼叫 T1.M()
是在 的主體 DynamicMethod中,或在其他動態產生的程式代碼中進行,仍會發生此載入。 如果目前的定義域是預設網域,在進程結束之前,無法卸載元件 C
。 如果目前網域稍後嘗試載入元件 C
,載入可能會失敗。
另請參閱
適用於
CreateInstanceAndUnwrap(String, String, Object[])
- 來源:
- AppDomain.cs
- 來源:
- AppDomain.cs
- 來源:
- AppDomain.cs
建立指定類型的新執行個體。 參數會指定定義類型所在的組件、類型的名稱和啟動屬性的陣列。
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
參數
- activationAttributes
- Object[]
一或多個屬性的陣列,此屬性可參與啟動過程。 陣列通常只會包含一個 UrlAttribute 物件來指定用以啟動遠端物件的 URL。
此參數與 client-activated 物件有關。用戶端啟動是一項舊的技術,保留目的在提供回溯相容性,不建議用於新的開發。 分散式應用程式應該改用 Windows Communication Foundation。
傳回
typeName
指定之物件的執行個體。
例外狀況
assemblyName
或 typeName
為 null
。
找不到相符的公用建構函式。
在 assemblyName
中找不到 typename
。
找不到 assemblyName
。
呼叫端沒有呼叫這個建構函式的權限。
呼叫者無法提供非繼承自 MarshalByRefObject 之物件的啟動屬性。
嘗試對卸載的應用程式定義域執行作業。
assemblyName
不是目前載入運行時間的有效元件。
使用兩個不同的辨識項載入組件或模組兩次。
範例
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
備註
這是結合 CreateInstance 和 ObjectHandle.Unwrap的便利方法。 這個方法會呼叫的 typeName
無參數建構函式。
如需的格式,assemblyName
請參閱 AssemblyName 。 Type.FullName如需 的格式typeName
,請參閱 屬性。
注意
如果您對 所傳回之型T1
別物件的方法M
進行早期綁定呼叫,而且該方法會對目前元件或包含T1
之元件C
中類型T2
之物件的方法進行早期系結呼叫,則元件C
會載入至目前的應用程式域。CreateInstanceAndUnwrap 即使 的早期系結呼叫 T1.M()
是在 的主體 DynamicMethod中,或在其他動態產生的程式代碼中進行,仍會發生此載入。 如果目前的定義域是預設網域,在進程結束之前,無法卸載元件 C
。 如果目前網域稍後嘗試載入元件 C
,載入可能會失敗。
另請參閱
適用於
CreateInstanceAndUnwrap(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[])
- 來源:
- AppDomain.cs
- 來源:
- AppDomain.cs
- 來源:
- AppDomain.cs
藉由指定是否忽略類型名稱的大小寫、用於選取要建立之類型的繫結屬性和繫結器、建構函式的引數、文化特性,以及啟動屬性,為指定之組件中定義的指定類型,建立新的執行個體。
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
參數
- ignoreCase
- Boolean
布林值,指出是否執行區分大小寫的搜尋。
- bindingAttr
- BindingFlags
零或多個位元旗標的組合,此位元旗標會影響 typeName
建構函式的搜尋。 如果 bindingAttr
為零,則會針對公用建構函式執行區分大小寫的搜尋。
- binder
- Binder
使用反映來啟用繫結、強制引數的類型、成員的引動過程,和擷取 MemberInfo 物件的物件。 如果 binder
為 null,則會使用預設繫結器。
- args
- Object[]
要傳遞到建構函式的引數。 這個引數陣列必須在數目、順序和類型上符合要叫用之建構函式的參數。 如果慣用無參數建構函式,則 args
必須是空陣列或 Null。
- culture
- CultureInfo
用來控制類型強制的特定文化特性物件。 如果 culture
為 null
,會使用目前執行緒的 CultureInfo
。
- activationAttributes
- Object[]
一或多個屬性的陣列,此屬性可參與啟動過程。 一般來說,就是包含單一 UrlAttribute 物件的陣列。 會指定啟動遠端物件所需的 URL。
此參數與啟動了用戶端的物件相關。 用戶端啟動是一項舊的技術,保留目的在提供回溯相容性,不建議用於新的開發。 分散式應用程式應該改用 Windows Communication Foundation。
傳回
typeName
指定之物件的執行個體。
例外狀況
assemblyName
或 typeName
為 null
。
找不到相符的建構函式。
在 assemblyName
中找不到 typename
。
找不到 assemblyName
。
呼叫端沒有呼叫這個建構函式的權限。
呼叫者無法提供非繼承自 MarshalByRefObject 之物件的啟動屬性。
嘗試對卸載的應用程式定義域執行作業。
assemblyName
不是目前載入運行時間的有效元件。
使用兩個不同的辨識項載入組件或模組兩次。
範例
下列範例示範如何使用 ignoreCase
參數。
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
備註
這是結合 CreateInstance 和 ObjectHandle.Unwrap的便利方法。
如需的格式,assemblyName
請參閱 AssemblyName 。 Type.FullName如需 的格式typeName
,請參閱 屬性。
注意
如果您對 所傳回之型T1
別物件的方法M
進行早期綁定呼叫,而且該方法會對目前元件或包含T1
之元件C
中類型T2
之物件的方法進行早期系結呼叫,則元件C
會載入至目前的應用程式域。CreateInstanceAndUnwrap 即使 的早期系結呼叫 T1.M()
是在 的主體 DynamicMethod中,或在其他動態產生的程式代碼中進行,仍會發生此載入。 如果目前的定義域是預設網域,在進程結束之前,無法卸載元件 C
。 如果目前網域稍後嘗試載入元件 C
,載入可能會失敗。
另請參閱
適用於
CreateInstanceAndUnwrap(String, String, Boolean, BindingFlags, Binder, Object[], CultureInfo, Object[], Evidence)
警告
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.
建立指定類型的新執行個體。 參數會指定類型的名稱,以及如何尋找和建立它。
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
參數
- ignoreCase
- Boolean
布林值,指出是否執行區分大小寫的搜尋。
- bindingAttr
- BindingFlags
零或多個位元旗標的組合,此位元旗標會影響 typeName
建構函式的搜尋。 如果 bindingAttr
為零,則會針對公用建構函式執行區分大小寫的搜尋。
- binder
- Binder
使用反映來啟用繫結、強制引數的類型、成員的引動過程,和擷取 MemberInfo 物件的物件。 如果 binder
為 null,則會使用預設繫結器。
- args
- Object[]
要傳遞到建構函式的引數。 這個引數陣列必須在數目、順序和類型上符合要叫用之建構函式的參數。 如果慣用無參數建構函式,則 args
必須是空陣列或 Null。
- culture
- CultureInfo
用來控制類型強制的特定文化特性物件。 如果 culture
為 null
,會使用目前執行緒的 CultureInfo
。
- activationAttributes
- Object[]
一或多個屬性的陣列,此屬性可參與啟動過程。 陣列通常只會包含一個 UrlAttribute 物件來指定用以啟動遠端物件的 URL。
此參數與啟動了用戶端的物件相關。 用戶端啟動是一項舊的技術,保留目的在提供回溯相容性,不建議用於新的開發。 分散式應用程式應該改用 Windows Communication Foundation。
- securityAttributes
- Evidence
用來授權建立 typeName
的資訊。
傳回
typeName
指定之物件的執行個體。
- 屬性
例外狀況
assemblyName
或 typeName
為 null
。
找不到相符的建構函式。
在 assemblyName
中找不到 typename
。
找不到 assemblyName
。
呼叫端沒有呼叫這個建構函式的權限。
呼叫者無法提供非繼承自 MarshalByRefObject 之物件的啟動屬性。
嘗試對卸載的應用程式定義域執行作業。
assemblyName
不是目前載入運行時間的有效元件。
使用兩個不同的辨識項載入組件或模組兩次。
範例
下列範例示範如何使用 ignoreCase
參數。
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
備註
這是結合 CreateInstance 和 ObjectHandle.Unwrap的便利方法。
如需的格式,assemblyName
請參閱 AssemblyName 。 Type.FullName如需 的格式typeName
,請參閱 屬性。
注意
如果您對 所傳回之型T1
別物件的方法M
進行早期綁定呼叫,而且該方法會對目前元件或包含T1
之元件C
中類型T2
之物件的方法進行早期系結呼叫,則元件C
會載入至目前的應用程式域。CreateInstanceAndUnwrap 即使 的早期系結呼叫 T1.M()
是在 的主體 DynamicMethod中,或在其他動態產生的程式代碼中進行,仍會發生此載入。 如果目前的定義域是預設網域,在進程結束之前,無法卸載元件 C
。 如果目前網域稍後嘗試載入元件 C
,載入可能會失敗。
另請參閱
適用於
意見反應
https://aka.ms/ContentUserFeedback。
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