ILGenerator.EmitWriteLine 메서드
정의
중요
일부 정보는 릴리스되기 전에 상당 부분 수정될 수 있는 시험판 제품과 관련이 있습니다. Microsoft는 여기에 제공된 정보에 대해 어떠한 명시적이거나 묵시적인 보증도 하지 않습니다.
여러 형식의 값을 사용하여 WriteLine()에 대한 호출을 내보내는 도우미 함수입니다.
오버로드
| EmitWriteLine(String) |
문자열로 WriteLine을 호출하는 MSIL(Microsoft Intermediate Language)을 내보냅니다. |
| EmitWriteLine(FieldInfo) |
지정한 필드로 WriteLine을 호출하는 데 필요한 MSIL(Microsoft Intermediate Language)을 내보냅니다. |
| EmitWriteLine(LocalBuilder) |
지정된 로컬 변수를 사용하여 WriteLine을 호출하는 데 필요한 MSIL(Microsoft 중간 언어)를 내보냅니다. |
EmitWriteLine(String)
- Source:
- ILGenerator.cs
- Source:
- ILGenerator.cs
- Source:
- ILGenerator.cs
문자열로 WriteLine을 호출하는 MSIL(Microsoft Intermediate Language)을 내보냅니다.
public:
virtual void EmitWriteLine(System::String ^ value);public virtual void EmitWriteLine (string value);abstract member EmitWriteLine : string -> unit
override this.EmitWriteLine : string -> unitPublic Overridable Sub EmitWriteLine (value As String)매개 변수
- value
- String
인쇄할 문자열입니다.
예제
아래 코드 샘플에서는 동적 메서드에서 콘솔에 EmitWriteLine 문자열을 쓰는 메서드의 컨텍스트 사용법을 보여 줍니다.
using namespace System;
using namespace System::Threading;
using namespace System::Reflection;
using namespace System::Reflection::Emit;
Type^ CreateDynamicType()
{
array<Type^>^ctorParams = {int::typeid,int::typeid};
AppDomain^ myDomain = Thread::GetDomain();
AssemblyName^ myAsmName = gcnew AssemblyName;
myAsmName->Name = "MyDynamicAssembly";
AssemblyBuilder^ myAsmBuilder = myDomain->DefineDynamicAssembly( myAsmName, AssemblyBuilderAccess::Run );
ModuleBuilder^ pointModule = myAsmBuilder->DefineDynamicModule( "PointModule", "Point.dll" );
TypeBuilder^ pointTypeBld = pointModule->DefineType( "Point", TypeAttributes::Public );
FieldBuilder^ xField = pointTypeBld->DefineField( "x", int::typeid, FieldAttributes::Public );
FieldBuilder^ yField = pointTypeBld->DefineField( "y", int::typeid, FieldAttributes::Public );
Type^ objType = Type::GetType( "System.Object" );
ConstructorInfo^ objCtor = objType->GetConstructor( gcnew array<Type^>(0) );
ConstructorBuilder^ pointCtor = pointTypeBld->DefineConstructor( MethodAttributes::Public, CallingConventions::Standard, ctorParams );
ILGenerator^ ctorIL = pointCtor->GetILGenerator();
// First, you build the constructor.
ctorIL->Emit( OpCodes::Ldarg_0 );
ctorIL->Emit( OpCodes::Call, objCtor );
ctorIL->Emit( OpCodes::Ldarg_0 );
ctorIL->Emit( OpCodes::Ldarg_1 );
ctorIL->Emit( OpCodes::Stfld, xField );
ctorIL->Emit( OpCodes::Ldarg_0 );
ctorIL->Emit( OpCodes::Ldarg_2 );
ctorIL->Emit( OpCodes::Stfld, yField );
ctorIL->Emit( OpCodes::Ret );
// Now, you'll build a method to output some information on the
// inside your dynamic class. This method will have the following
// definition in C#:
// public void WritePoint()
MethodBuilder^ writeStrMthd = pointTypeBld->DefineMethod( "WritePoint", MethodAttributes::Public, void::typeid, nullptr );
ILGenerator^ writeStrIL = writeStrMthd->GetILGenerator();
// The below ILGenerator created demonstrates a few ways to create
// String* output through STDIN.
// ILGenerator::EmitWriteLine(String*) will generate a ldstr and a
// call to WriteLine for you.
writeStrIL->EmitWriteLine( "The value of this current instance is:" );
// Here, you will do the hard work yourself. First, you need to create
// the String* we will be passing and obtain the correct WriteLine overload
// for said String*. In the below case, you are substituting in two values,
// so the chosen overload is Console::WriteLine(String*, Object*, Object*).
String^ inStr = "( {0}, {1})";
array<Type^>^wlParams = {String::typeid,Object::typeid,Object::typeid};
// We need the MethodInfo to pass into EmitCall later.
MethodInfo^ writeLineMI = Console::typeid->GetMethod( "WriteLine", wlParams );
// Push the String* with the substitutions onto the stack.
// This is the first argument for WriteLine - the String* one.
writeStrIL->Emit( OpCodes::Ldstr, inStr );
// Since the second argument is an Object*, and it corresponds to
// to the substitution for the value of our integer field, you
// need to box that field to an Object*. First, push a reference
// to the current instance, and then push the value stored in
// field 'x'. We need the reference to the current instance (stored
// in local argument index 0) so Ldfld can load from the correct
// instance (this one).
writeStrIL->Emit( OpCodes::Ldarg_0 );
writeStrIL->Emit( OpCodes::Ldfld, xField );
// Now, we execute the box opcode, which pops the value of field 'x',
// returning a reference to the integer value boxed as an Object*.
writeStrIL->Emit( OpCodes::Box, int::typeid );
// Atop the stack, you'll find our String* inStr, followed by a reference
// to the boxed value of 'x'. Now, you need to likewise box field 'y'.
writeStrIL->Emit( OpCodes::Ldarg_0 );
writeStrIL->Emit( OpCodes::Ldfld, yField );
writeStrIL->Emit( OpCodes::Box, int::typeid );
// Now, you have all of the arguments for your call to
// Console::WriteLine(String*, Object*, Object*) atop the stack:
// the String* InStr, a reference to the boxed value of 'x', and
// a reference to the boxed value of 'y'.
// Call Console::WriteLine(String*, Object*, Object*) with EmitCall.
writeStrIL->EmitCall( OpCodes::Call, writeLineMI, nullptr );
// Lastly, EmitWriteLine can also output the value of a field
// using the overload EmitWriteLine(FieldInfo).
writeStrIL->EmitWriteLine( "The value of 'x' is:" );
writeStrIL->EmitWriteLine( xField );
writeStrIL->EmitWriteLine( "The value of 'y' is:" );
writeStrIL->EmitWriteLine( yField );
// Since we return no value (void), the ret opcode will not
// return the top stack value.
writeStrIL->Emit( OpCodes::Ret );
return pointTypeBld->CreateType();
}
int main()
{
array<Object^>^ctorParams = gcnew array<Object^>(2);
Console::Write( "Enter a integer value for X: " );
String^ myX = Console::ReadLine();
Console::Write( "Enter a integer value for Y: " );
String^ myY = Console::ReadLine();
Console::WriteLine( "---" );
ctorParams[ 0 ] = Convert::ToInt32( myX );
ctorParams[ 1 ] = Convert::ToInt32( myY );
Type^ ptType = CreateDynamicType();
Object^ ptInstance = Activator::CreateInstance( ptType, ctorParams );
ptType->InvokeMember( "WritePoint", BindingFlags::InvokeMethod, nullptr, ptInstance, gcnew array<Object^>(0) );
}
using System;
using System.Threading;
using System.Reflection;
using System.Reflection.Emit;
class EmitWriteLineDemo {
public static Type CreateDynamicType() {
Type[] ctorParams = new Type[] {typeof(int),
typeof(int)};
AppDomain myDomain = Thread.GetDomain();
AssemblyName myAsmName = new AssemblyName();
myAsmName.Name = "MyDynamicAssembly";
AssemblyBuilder myAsmBuilder = myDomain.DefineDynamicAssembly(
myAsmName,
AssemblyBuilderAccess.Run);
ModuleBuilder pointModule = myAsmBuilder.DefineDynamicModule("PointModule",
"Point.dll");
TypeBuilder pointTypeBld = pointModule.DefineType("Point",
TypeAttributes.Public);
FieldBuilder xField = pointTypeBld.DefineField("x", typeof(int),
FieldAttributes.Public);
FieldBuilder yField = pointTypeBld.DefineField("y", typeof(int),
FieldAttributes.Public);
Type objType = Type.GetType("System.Object");
ConstructorInfo objCtor = objType.GetConstructor(new Type[0]);
ConstructorBuilder pointCtor = pointTypeBld.DefineConstructor(
MethodAttributes.Public,
CallingConventions.Standard,
ctorParams);
ILGenerator ctorIL = pointCtor.GetILGenerator();
// First, you build the constructor.
ctorIL.Emit(OpCodes.Ldarg_0);
ctorIL.Emit(OpCodes.Call, objCtor);
ctorIL.Emit(OpCodes.Ldarg_0);
ctorIL.Emit(OpCodes.Ldarg_1);
ctorIL.Emit(OpCodes.Stfld, xField);
ctorIL.Emit(OpCodes.Ldarg_0);
ctorIL.Emit(OpCodes.Ldarg_2);
ctorIL.Emit(OpCodes.Stfld, yField);
ctorIL.Emit(OpCodes.Ret);
// Now, you'll build a method to output some information on the
// inside your dynamic class. This method will have the following
// definition in C#:
// public void WritePoint()
MethodBuilder writeStrMthd = pointTypeBld.DefineMethod(
"WritePoint",
MethodAttributes.Public,
typeof(void),
null);
ILGenerator writeStrIL = writeStrMthd.GetILGenerator();
// The below ILGenerator created demonstrates a few ways to create
// string output through STDIN.
// ILGenerator.EmitWriteLine(string) will generate a ldstr and a
// call to WriteLine for you.
writeStrIL.EmitWriteLine("The value of this current instance is:");
// Here, you will do the hard work yourself. First, you need to create
// the string we will be passing and obtain the correct WriteLine overload
// for said string. In the below case, you are substituting in two values,
// so the chosen overload is Console.WriteLine(string, object, object).
String inStr = "({0}, {1})";
Type[] wlParams = new Type[] {typeof(string),
typeof(object),
typeof(object)};
// We need the MethodInfo to pass into EmitCall later.
MethodInfo writeLineMI = typeof(Console).GetMethod(
"WriteLine",
wlParams);
// Push the string with the substitutions onto the stack.
// This is the first argument for WriteLine - the string one.
writeStrIL.Emit(OpCodes.Ldstr, inStr);
// Since the second argument is an object, and it corresponds to
// to the substitution for the value of our integer field, you
// need to box that field to an object. First, push a reference
// to the current instance, and then push the value stored in
// field 'x'. We need the reference to the current instance (stored
// in local argument index 0) so Ldfld can load from the correct
// instance (this one).
writeStrIL.Emit(OpCodes.Ldarg_0);
writeStrIL.Emit(OpCodes.Ldfld, xField);
// Now, we execute the box opcode, which pops the value of field 'x',
// returning a reference to the integer value boxed as an object.
writeStrIL.Emit(OpCodes.Box, typeof(int));
// Atop the stack, you'll find our string inStr, followed by a reference
// to the boxed value of 'x'. Now, you need to likewise box field 'y'.
writeStrIL.Emit(OpCodes.Ldarg_0);
writeStrIL.Emit(OpCodes.Ldfld, yField);
writeStrIL.Emit(OpCodes.Box, typeof(int));
// Now, you have all of the arguments for your call to
// Console.WriteLine(string, object, object) atop the stack:
// the string InStr, a reference to the boxed value of 'x', and
// a reference to the boxed value of 'y'.
// Call Console.WriteLine(string, object, object) with EmitCall.
writeStrIL.EmitCall(OpCodes.Call, writeLineMI, null);
// Lastly, EmitWriteLine can also output the value of a field
// using the overload EmitWriteLine(FieldInfo).
writeStrIL.EmitWriteLine("The value of 'x' is:");
writeStrIL.EmitWriteLine(xField);
writeStrIL.EmitWriteLine("The value of 'y' is:");
writeStrIL.EmitWriteLine(yField);
// Since we return no value (void), the ret opcode will not
// return the top stack value.
writeStrIL.Emit(OpCodes.Ret);
return pointTypeBld.CreateType();
}
public static void Main() {
object[] ctorParams = new object[2];
Console.Write("Enter a integer value for X: ");
string myX = Console.ReadLine();
Console.Write("Enter a integer value for Y: ");
string myY = Console.ReadLine();
Console.WriteLine("---");
ctorParams[0] = Convert.ToInt32(myX);
ctorParams[1] = Convert.ToInt32(myY);
Type ptType = CreateDynamicType();
object ptInstance = Activator.CreateInstance(ptType, ctorParams);
ptType.InvokeMember("WritePoint",
BindingFlags.InvokeMethod,
null,
ptInstance,
new object[0]);
}
}
Imports System.Threading
Imports System.Reflection
Imports System.Reflection.Emit
_
Class EmitWriteLineDemo
Public Shared Function CreateDynamicType() As Type
Dim ctorParams() As Type = {GetType(Integer), GetType(Integer)}
Dim myDomain As AppDomain = Thread.GetDomain()
Dim myAsmName As New AssemblyName()
myAsmName.Name = "MyDynamicAssembly"
Dim myAsmBuilder As AssemblyBuilder = myDomain.DefineDynamicAssembly(myAsmName, AssemblyBuilderAccess.RunAndSave)
Dim pointModule As ModuleBuilder = myAsmBuilder.DefineDynamicModule("PointModule", "Point.dll")
Dim pointTypeBld As TypeBuilder = pointModule.DefineType("Point", _
TypeAttributes.Public)
Dim xField As FieldBuilder = pointTypeBld.DefineField("x", _
GetType(Integer), _
FieldAttributes.Public)
Dim yField As FieldBuilder = pointTypeBld.DefineField("y", _
GetType(Integer), _
FieldAttributes.Public)
Dim objType As Type = Type.GetType("System.Object")
Dim objCtor As ConstructorInfo = objType.GetConstructor(New Type(){})
Dim pointCtor As ConstructorBuilder = pointTypeBld.DefineConstructor( _
MethodAttributes.Public, _
CallingConventions.Standard, _
ctorParams)
Dim ctorIL As ILGenerator = pointCtor.GetILGenerator()
' First, you build the constructor.
ctorIL.Emit(OpCodes.Ldarg_0)
ctorIL.Emit(OpCodes.Call, objCtor)
ctorIL.Emit(OpCodes.Ldarg_0)
ctorIL.Emit(OpCodes.Ldarg_1)
ctorIL.Emit(OpCodes.Stfld, xField)
ctorIL.Emit(OpCodes.Ldarg_0)
ctorIL.Emit(OpCodes.Ldarg_2)
ctorIL.Emit(OpCodes.Stfld, yField)
ctorIL.Emit(OpCodes.Ret)
' Now, you'll build a method to output some information on the
' inside your dynamic class. This method will have the following
' definition in C#:
' Public Sub WritePoint()
Dim writeStrMthd As MethodBuilder = pointTypeBld.DefineMethod("WritePoint", _
MethodAttributes.Public, _
Nothing, Nothing)
Dim writeStrIL As ILGenerator = writeStrMthd.GetILGenerator()
' The below ILGenerator created demonstrates a few ways to create
' string output through STDIN.
' ILGenerator.EmitWriteLine(string) will generate a ldstr and a
' call to WriteLine for you.
writeStrIL.EmitWriteLine("The value of this current instance is:")
' Here, you will do the hard work yourself. First, you need to create
' the string we will be passing and obtain the correct WriteLine overload
' for said string. In the below case, you are substituting in two values,
' so the chosen overload is Console.WriteLine(string, object, object).
Dim inStr As [String] = "({0}, {1})"
Dim wlParams() As Type = {GetType(String), GetType(Object), GetType(Object)}
' We need the MethodInfo to pass into EmitCall later.
Dim writeLineMI As MethodInfo = GetType(Console).GetMethod("WriteLine", wlParams)
' Push the string with the substitutions onto the stack.
' This is the first argument for WriteLine - the string one.
writeStrIL.Emit(OpCodes.Ldstr, inStr)
' Since the second argument is an object, and it corresponds to
' to the substitution for the value of our integer field, you
' need to box that field to an object. First, push a reference
' to the current instance, and then push the value stored in
' field 'x'. We need the reference to the current instance (stored
' in local argument index 0) so Ldfld can load from the correct
' instance (this one).
writeStrIL.Emit(OpCodes.Ldarg_0)
writeStrIL.Emit(OpCodes.Ldfld, xField)
' Now, we execute the box opcode, which pops the value of field 'x',
' returning a reference to the integer value boxed as an object.
writeStrIL.Emit(OpCodes.Box, GetType(Integer))
' Atop the stack, you'll find our string inStr, followed by a reference
' to the boxed value of 'x'. Now, you need to likewise box field 'y'.
writeStrIL.Emit(OpCodes.Ldarg_0)
writeStrIL.Emit(OpCodes.Ldfld, yField)
writeStrIL.Emit(OpCodes.Box, GetType(Integer))
' Now, you have all of the arguments for your call to
' Console.WriteLine(string, object, object) atop the stack:
' the string InStr, a reference to the boxed value of 'x', and
' a reference to the boxed value of 'y'.
' Call Console.WriteLine(string, object, object) with EmitCall.
writeStrIL.EmitCall(OpCodes.Call, writeLineMI, Nothing)
' Lastly, EmitWriteLine can also output the value of a field
' using the overload EmitWriteLine(FieldInfo).
writeStrIL.EmitWriteLine("The value of 'x' is:")
writeStrIL.EmitWriteLine(xField)
writeStrIL.EmitWriteLine("The value of 'y' is:")
writeStrIL.EmitWriteLine(yField)
' Since we return no value (void), the ret opcode will not
' return the top stack value.
writeStrIL.Emit(OpCodes.Ret)
Return pointTypeBld.CreateType()
End Function 'CreateDynamicType
Public Shared Sub Main()
Dim ctorParams(1) As Object
Console.Write("Enter a integer value for X: ")
Dim myX As String = Console.ReadLine()
Console.Write("Enter a integer value for Y: ")
Dim myY As String = Console.ReadLine()
Console.WriteLine("---")
ctorParams(0) = Convert.ToInt32(myX)
ctorParams(1) = Convert.ToInt32(myY)
Dim ptType As Type = CreateDynamicType()
Dim ptInstance As Object = Activator.CreateInstance(ptType, ctorParams)
ptType.InvokeMember("WritePoint", _
BindingFlags.InvokeMethod, _
Nothing, ptInstance, Nothing)
End Sub
End Class
설명
문자열이 이미 정의되어 있어야 합니다.
적용 대상
EmitWriteLine(FieldInfo)
- Source:
- ILGenerator.cs
- Source:
- ILGenerator.cs
- Source:
- ILGenerator.cs
지정한 필드로 WriteLine을 호출하는 데 필요한 MSIL(Microsoft Intermediate Language)을 내보냅니다.
public:
virtual void EmitWriteLine(System::Reflection::FieldInfo ^ fld);public virtual void EmitWriteLine (System.Reflection.FieldInfo fld);abstract member EmitWriteLine : System.Reflection.FieldInfo -> unit
override this.EmitWriteLine : System.Reflection.FieldInfo -> unitPublic Overridable Sub EmitWriteLine (fld As FieldInfo)매개 변수
- fld
- FieldInfo
해당 값을 콘솔에 기록할 필드입니다.
예외
지정한 필드의 형식을 받아들이는 WriteLine 메서드의 오버로드가 없는 경우
fld이(가) null인 경우
필드의 형식이 지원되지 않는 TypeBuilder 또는 EnumBuilder인 경우
예제
다음 코드 샘플에서는 메서드를 사용하여 EmitWriteLine 동적 메서드로 콘솔에 문자열을 쓰는 방법을 보여 줍니다.
using namespace System;
using namespace System::Threading;
using namespace System::Reflection;
using namespace System::Reflection::Emit;
Type^ CreateDynamicType()
{
array<Type^>^ctorParams = {int::typeid,int::typeid};
AppDomain^ myDomain = Thread::GetDomain();
AssemblyName^ myAsmName = gcnew AssemblyName;
myAsmName->Name = "MyDynamicAssembly";
AssemblyBuilder^ myAsmBuilder = myDomain->DefineDynamicAssembly( myAsmName, AssemblyBuilderAccess::Run );
ModuleBuilder^ pointModule = myAsmBuilder->DefineDynamicModule( "PointModule", "Point.dll" );
TypeBuilder^ pointTypeBld = pointModule->DefineType( "Point", TypeAttributes::Public );
FieldBuilder^ xField = pointTypeBld->DefineField( "x", int::typeid, FieldAttributes::Public );
FieldBuilder^ yField = pointTypeBld->DefineField( "y", int::typeid, FieldAttributes::Public );
Type^ objType = Type::GetType( "System.Object" );
ConstructorInfo^ objCtor = objType->GetConstructor( gcnew array<Type^>(0) );
ConstructorBuilder^ pointCtor = pointTypeBld->DefineConstructor( MethodAttributes::Public, CallingConventions::Standard, ctorParams );
ILGenerator^ ctorIL = pointCtor->GetILGenerator();
// First, you build the constructor.
ctorIL->Emit( OpCodes::Ldarg_0 );
ctorIL->Emit( OpCodes::Call, objCtor );
ctorIL->Emit( OpCodes::Ldarg_0 );
ctorIL->Emit( OpCodes::Ldarg_1 );
ctorIL->Emit( OpCodes::Stfld, xField );
ctorIL->Emit( OpCodes::Ldarg_0 );
ctorIL->Emit( OpCodes::Ldarg_2 );
ctorIL->Emit( OpCodes::Stfld, yField );
ctorIL->Emit( OpCodes::Ret );
// Now, you'll build a method to output some information on the
// inside your dynamic class. This method will have the following
// definition in C#:
// public void WritePoint()
MethodBuilder^ writeStrMthd = pointTypeBld->DefineMethod( "WritePoint", MethodAttributes::Public, void::typeid, nullptr );
ILGenerator^ writeStrIL = writeStrMthd->GetILGenerator();
// The below ILGenerator created demonstrates a few ways to create
// String* output through STDIN.
// ILGenerator::EmitWriteLine(String*) will generate a ldstr and a
// call to WriteLine for you.
writeStrIL->EmitWriteLine( "The value of this current instance is:" );
// Here, you will do the hard work yourself. First, you need to create
// the String* we will be passing and obtain the correct WriteLine overload
// for said String*. In the below case, you are substituting in two values,
// so the chosen overload is Console::WriteLine(String*, Object*, Object*).
String^ inStr = "( {0}, {1})";
array<Type^>^wlParams = {String::typeid,Object::typeid,Object::typeid};
// We need the MethodInfo to pass into EmitCall later.
MethodInfo^ writeLineMI = Console::typeid->GetMethod( "WriteLine", wlParams );
// Push the String* with the substitutions onto the stack.
// This is the first argument for WriteLine - the String* one.
writeStrIL->Emit( OpCodes::Ldstr, inStr );
// Since the second argument is an Object*, and it corresponds to
// to the substitution for the value of our integer field, you
// need to box that field to an Object*. First, push a reference
// to the current instance, and then push the value stored in
// field 'x'. We need the reference to the current instance (stored
// in local argument index 0) so Ldfld can load from the correct
// instance (this one).
writeStrIL->Emit( OpCodes::Ldarg_0 );
writeStrIL->Emit( OpCodes::Ldfld, xField );
// Now, we execute the box opcode, which pops the value of field 'x',
// returning a reference to the integer value boxed as an Object*.
writeStrIL->Emit( OpCodes::Box, int::typeid );
// Atop the stack, you'll find our String* inStr, followed by a reference
// to the boxed value of 'x'. Now, you need to likewise box field 'y'.
writeStrIL->Emit( OpCodes::Ldarg_0 );
writeStrIL->Emit( OpCodes::Ldfld, yField );
writeStrIL->Emit( OpCodes::Box, int::typeid );
// Now, you have all of the arguments for your call to
// Console::WriteLine(String*, Object*, Object*) atop the stack:
// the String* InStr, a reference to the boxed value of 'x', and
// a reference to the boxed value of 'y'.
// Call Console::WriteLine(String*, Object*, Object*) with EmitCall.
writeStrIL->EmitCall( OpCodes::Call, writeLineMI, nullptr );
// Lastly, EmitWriteLine can also output the value of a field
// using the overload EmitWriteLine(FieldInfo).
writeStrIL->EmitWriteLine( "The value of 'x' is:" );
writeStrIL->EmitWriteLine( xField );
writeStrIL->EmitWriteLine( "The value of 'y' is:" );
writeStrIL->EmitWriteLine( yField );
// Since we return no value (void), the ret opcode will not
// return the top stack value.
writeStrIL->Emit( OpCodes::Ret );
return pointTypeBld->CreateType();
}
int main()
{
array<Object^>^ctorParams = gcnew array<Object^>(2);
Console::Write( "Enter a integer value for X: " );
String^ myX = Console::ReadLine();
Console::Write( "Enter a integer value for Y: " );
String^ myY = Console::ReadLine();
Console::WriteLine( "---" );
ctorParams[ 0 ] = Convert::ToInt32( myX );
ctorParams[ 1 ] = Convert::ToInt32( myY );
Type^ ptType = CreateDynamicType();
Object^ ptInstance = Activator::CreateInstance( ptType, ctorParams );
ptType->InvokeMember( "WritePoint", BindingFlags::InvokeMethod, nullptr, ptInstance, gcnew array<Object^>(0) );
}
using System;
using System.Threading;
using System.Reflection;
using System.Reflection.Emit;
class EmitWriteLineDemo {
public static Type CreateDynamicType() {
Type[] ctorParams = new Type[] {typeof(int),
typeof(int)};
AppDomain myDomain = Thread.GetDomain();
AssemblyName myAsmName = new AssemblyName();
myAsmName.Name = "MyDynamicAssembly";
AssemblyBuilder myAsmBuilder = myDomain.DefineDynamicAssembly(
myAsmName,
AssemblyBuilderAccess.Run);
ModuleBuilder pointModule = myAsmBuilder.DefineDynamicModule("PointModule",
"Point.dll");
TypeBuilder pointTypeBld = pointModule.DefineType("Point",
TypeAttributes.Public);
FieldBuilder xField = pointTypeBld.DefineField("x", typeof(int),
FieldAttributes.Public);
FieldBuilder yField = pointTypeBld.DefineField("y", typeof(int),
FieldAttributes.Public);
Type objType = Type.GetType("System.Object");
ConstructorInfo objCtor = objType.GetConstructor(new Type[0]);
ConstructorBuilder pointCtor = pointTypeBld.DefineConstructor(
MethodAttributes.Public,
CallingConventions.Standard,
ctorParams);
ILGenerator ctorIL = pointCtor.GetILGenerator();
// First, you build the constructor.
ctorIL.Emit(OpCodes.Ldarg_0);
ctorIL.Emit(OpCodes.Call, objCtor);
ctorIL.Emit(OpCodes.Ldarg_0);
ctorIL.Emit(OpCodes.Ldarg_1);
ctorIL.Emit(OpCodes.Stfld, xField);
ctorIL.Emit(OpCodes.Ldarg_0);
ctorIL.Emit(OpCodes.Ldarg_2);
ctorIL.Emit(OpCodes.Stfld, yField);
ctorIL.Emit(OpCodes.Ret);
// Now, you'll build a method to output some information on the
// inside your dynamic class. This method will have the following
// definition in C#:
// public void WritePoint()
MethodBuilder writeStrMthd = pointTypeBld.DefineMethod(
"WritePoint",
MethodAttributes.Public,
typeof(void),
null);
ILGenerator writeStrIL = writeStrMthd.GetILGenerator();
// The below ILGenerator created demonstrates a few ways to create
// string output through STDIN.
// ILGenerator.EmitWriteLine(string) will generate a ldstr and a
// call to WriteLine for you.
writeStrIL.EmitWriteLine("The value of this current instance is:");
// Here, you will do the hard work yourself. First, you need to create
// the string we will be passing and obtain the correct WriteLine overload
// for said string. In the below case, you are substituting in two values,
// so the chosen overload is Console.WriteLine(string, object, object).
String inStr = "({0}, {1})";
Type[] wlParams = new Type[] {typeof(string),
typeof(object),
typeof(object)};
// We need the MethodInfo to pass into EmitCall later.
MethodInfo writeLineMI = typeof(Console).GetMethod(
"WriteLine",
wlParams);
// Push the string with the substitutions onto the stack.
// This is the first argument for WriteLine - the string one.
writeStrIL.Emit(OpCodes.Ldstr, inStr);
// Since the second argument is an object, and it corresponds to
// to the substitution for the value of our integer field, you
// need to box that field to an object. First, push a reference
// to the current instance, and then push the value stored in
// field 'x'. We need the reference to the current instance (stored
// in local argument index 0) so Ldfld can load from the correct
// instance (this one).
writeStrIL.Emit(OpCodes.Ldarg_0);
writeStrIL.Emit(OpCodes.Ldfld, xField);
// Now, we execute the box opcode, which pops the value of field 'x',
// returning a reference to the integer value boxed as an object.
writeStrIL.Emit(OpCodes.Box, typeof(int));
// Atop the stack, you'll find our string inStr, followed by a reference
// to the boxed value of 'x'. Now, you need to likewise box field 'y'.
writeStrIL.Emit(OpCodes.Ldarg_0);
writeStrIL.Emit(OpCodes.Ldfld, yField);
writeStrIL.Emit(OpCodes.Box, typeof(int));
// Now, you have all of the arguments for your call to
// Console.WriteLine(string, object, object) atop the stack:
// the string InStr, a reference to the boxed value of 'x', and
// a reference to the boxed value of 'y'.
// Call Console.WriteLine(string, object, object) with EmitCall.
writeStrIL.EmitCall(OpCodes.Call, writeLineMI, null);
// Lastly, EmitWriteLine can also output the value of a field
// using the overload EmitWriteLine(FieldInfo).
writeStrIL.EmitWriteLine("The value of 'x' is:");
writeStrIL.EmitWriteLine(xField);
writeStrIL.EmitWriteLine("The value of 'y' is:");
writeStrIL.EmitWriteLine(yField);
// Since we return no value (void), the ret opcode will not
// return the top stack value.
writeStrIL.Emit(OpCodes.Ret);
return pointTypeBld.CreateType();
}
public static void Main() {
object[] ctorParams = new object[2];
Console.Write("Enter a integer value for X: ");
string myX = Console.ReadLine();
Console.Write("Enter a integer value for Y: ");
string myY = Console.ReadLine();
Console.WriteLine("---");
ctorParams[0] = Convert.ToInt32(myX);
ctorParams[1] = Convert.ToInt32(myY);
Type ptType = CreateDynamicType();
object ptInstance = Activator.CreateInstance(ptType, ctorParams);
ptType.InvokeMember("WritePoint",
BindingFlags.InvokeMethod,
null,
ptInstance,
new object[0]);
}
}
Imports System.Threading
Imports System.Reflection
Imports System.Reflection.Emit
_
Class EmitWriteLineDemo
Public Shared Function CreateDynamicType() As Type
Dim ctorParams() As Type = {GetType(Integer), GetType(Integer)}
Dim myDomain As AppDomain = Thread.GetDomain()
Dim myAsmName As New AssemblyName()
myAsmName.Name = "MyDynamicAssembly"
Dim myAsmBuilder As AssemblyBuilder = myDomain.DefineDynamicAssembly(myAsmName, AssemblyBuilderAccess.RunAndSave)
Dim pointModule As ModuleBuilder = myAsmBuilder.DefineDynamicModule("PointModule", "Point.dll")
Dim pointTypeBld As TypeBuilder = pointModule.DefineType("Point", _
TypeAttributes.Public)
Dim xField As FieldBuilder = pointTypeBld.DefineField("x", _
GetType(Integer), _
FieldAttributes.Public)
Dim yField As FieldBuilder = pointTypeBld.DefineField("y", _
GetType(Integer), _
FieldAttributes.Public)
Dim objType As Type = Type.GetType("System.Object")
Dim objCtor As ConstructorInfo = objType.GetConstructor(New Type(){})
Dim pointCtor As ConstructorBuilder = pointTypeBld.DefineConstructor( _
MethodAttributes.Public, _
CallingConventions.Standard, _
ctorParams)
Dim ctorIL As ILGenerator = pointCtor.GetILGenerator()
' First, you build the constructor.
ctorIL.Emit(OpCodes.Ldarg_0)
ctorIL.Emit(OpCodes.Call, objCtor)
ctorIL.Emit(OpCodes.Ldarg_0)
ctorIL.Emit(OpCodes.Ldarg_1)
ctorIL.Emit(OpCodes.Stfld, xField)
ctorIL.Emit(OpCodes.Ldarg_0)
ctorIL.Emit(OpCodes.Ldarg_2)
ctorIL.Emit(OpCodes.Stfld, yField)
ctorIL.Emit(OpCodes.Ret)
' Now, you'll build a method to output some information on the
' inside your dynamic class. This method will have the following
' definition in C#:
' Public Sub WritePoint()
Dim writeStrMthd As MethodBuilder = pointTypeBld.DefineMethod("WritePoint", _
MethodAttributes.Public, _
Nothing, Nothing)
Dim writeStrIL As ILGenerator = writeStrMthd.GetILGenerator()
' The below ILGenerator created demonstrates a few ways to create
' string output through STDIN.
' ILGenerator.EmitWriteLine(string) will generate a ldstr and a
' call to WriteLine for you.
writeStrIL.EmitWriteLine("The value of this current instance is:")
' Here, you will do the hard work yourself. First, you need to create
' the string we will be passing and obtain the correct WriteLine overload
' for said string. In the below case, you are substituting in two values,
' so the chosen overload is Console.WriteLine(string, object, object).
Dim inStr As [String] = "({0}, {1})"
Dim wlParams() As Type = {GetType(String), GetType(Object), GetType(Object)}
' We need the MethodInfo to pass into EmitCall later.
Dim writeLineMI As MethodInfo = GetType(Console).GetMethod("WriteLine", wlParams)
' Push the string with the substitutions onto the stack.
' This is the first argument for WriteLine - the string one.
writeStrIL.Emit(OpCodes.Ldstr, inStr)
' Since the second argument is an object, and it corresponds to
' to the substitution for the value of our integer field, you
' need to box that field to an object. First, push a reference
' to the current instance, and then push the value stored in
' field 'x'. We need the reference to the current instance (stored
' in local argument index 0) so Ldfld can load from the correct
' instance (this one).
writeStrIL.Emit(OpCodes.Ldarg_0)
writeStrIL.Emit(OpCodes.Ldfld, xField)
' Now, we execute the box opcode, which pops the value of field 'x',
' returning a reference to the integer value boxed as an object.
writeStrIL.Emit(OpCodes.Box, GetType(Integer))
' Atop the stack, you'll find our string inStr, followed by a reference
' to the boxed value of 'x'. Now, you need to likewise box field 'y'.
writeStrIL.Emit(OpCodes.Ldarg_0)
writeStrIL.Emit(OpCodes.Ldfld, yField)
writeStrIL.Emit(OpCodes.Box, GetType(Integer))
' Now, you have all of the arguments for your call to
' Console.WriteLine(string, object, object) atop the stack:
' the string InStr, a reference to the boxed value of 'x', and
' a reference to the boxed value of 'y'.
' Call Console.WriteLine(string, object, object) with EmitCall.
writeStrIL.EmitCall(OpCodes.Call, writeLineMI, Nothing)
' Lastly, EmitWriteLine can also output the value of a field
' using the overload EmitWriteLine(FieldInfo).
writeStrIL.EmitWriteLine("The value of 'x' is:")
writeStrIL.EmitWriteLine(xField)
writeStrIL.EmitWriteLine("The value of 'y' is:")
writeStrIL.EmitWriteLine(yField)
' Since we return no value (void), the ret opcode will not
' return the top stack value.
writeStrIL.Emit(OpCodes.Ret)
Return pointTypeBld.CreateType()
End Function 'CreateDynamicType
Public Shared Sub Main()
Dim ctorParams(1) As Object
Console.Write("Enter a integer value for X: ")
Dim myX As String = Console.ReadLine()
Console.Write("Enter a integer value for Y: ")
Dim myY As String = Console.ReadLine()
Console.WriteLine("---")
ctorParams(0) = Convert.ToInt32(myX)
ctorParams(1) = Convert.ToInt32(myY)
Dim ptType As Type = CreateDynamicType()
Dim ptInstance As Object = Activator.CreateInstance(ptType, ctorParams)
ptType.InvokeMember("WritePoint", _
BindingFlags.InvokeMethod, _
Nothing, ptInstance, Nothing)
End Sub
End Class
설명
의 fld 형식은 메서드 오버로드 Console.WriteLine 의 매개 변수 형식과 일치해야 합니다.
적용 대상
EmitWriteLine(LocalBuilder)
- Source:
- ILGenerator.cs
- Source:
- ILGenerator.cs
- Source:
- ILGenerator.cs
지정된 로컬 변수를 사용하여 WriteLine을 호출하는 데 필요한 MSIL(Microsoft 중간 언어)를 내보냅니다.
public:
virtual void EmitWriteLine(System::Reflection::Emit::LocalBuilder ^ localBuilder);public virtual void EmitWriteLine (System.Reflection.Emit.LocalBuilder localBuilder);abstract member EmitWriteLine : System.Reflection.Emit.LocalBuilder -> unit
override this.EmitWriteLine : System.Reflection.Emit.LocalBuilder -> unitPublic Overridable Sub EmitWriteLine (localBuilder As LocalBuilder)매개 변수
- localBuilder
- LocalBuilder
해당 값이 콘솔에 기록될 로컬 변수입니다.
예외
localBuilder 형식이 지원되지 않는 TypeBuilder 또는 EnumBuilder인 경우
또는
localBuilder 형식을 수락하는 WriteLine의 오버로드가 없는 경우
localBuilder이(가) null인 경우
예제
아래 코드 샘플에서는 동적 메서드에서 콘솔에 EmitWriteLine 문자열을 쓰는 메서드의 컨텍스트 사용법을 보여 줍니다.
using namespace System;
using namespace System::Threading;
using namespace System::Reflection;
using namespace System::Reflection::Emit;
Type^ CreateDynamicType()
{
array<Type^>^ctorParams = {int::typeid,int::typeid};
AppDomain^ myDomain = Thread::GetDomain();
AssemblyName^ myAsmName = gcnew AssemblyName;
myAsmName->Name = "MyDynamicAssembly";
AssemblyBuilder^ myAsmBuilder = myDomain->DefineDynamicAssembly( myAsmName, AssemblyBuilderAccess::Run );
ModuleBuilder^ pointModule = myAsmBuilder->DefineDynamicModule( "PointModule", "Point.dll" );
TypeBuilder^ pointTypeBld = pointModule->DefineType( "Point", TypeAttributes::Public );
FieldBuilder^ xField = pointTypeBld->DefineField( "x", int::typeid, FieldAttributes::Public );
FieldBuilder^ yField = pointTypeBld->DefineField( "y", int::typeid, FieldAttributes::Public );
Type^ objType = Type::GetType( "System.Object" );
ConstructorInfo^ objCtor = objType->GetConstructor( gcnew array<Type^>(0) );
ConstructorBuilder^ pointCtor = pointTypeBld->DefineConstructor( MethodAttributes::Public, CallingConventions::Standard, ctorParams );
ILGenerator^ ctorIL = pointCtor->GetILGenerator();
// First, you build the constructor.
ctorIL->Emit( OpCodes::Ldarg_0 );
ctorIL->Emit( OpCodes::Call, objCtor );
ctorIL->Emit( OpCodes::Ldarg_0 );
ctorIL->Emit( OpCodes::Ldarg_1 );
ctorIL->Emit( OpCodes::Stfld, xField );
ctorIL->Emit( OpCodes::Ldarg_0 );
ctorIL->Emit( OpCodes::Ldarg_2 );
ctorIL->Emit( OpCodes::Stfld, yField );
ctorIL->Emit( OpCodes::Ret );
// Now, you'll build a method to output some information on the
// inside your dynamic class. This method will have the following
// definition in C#:
// public void WritePoint()
MethodBuilder^ writeStrMthd = pointTypeBld->DefineMethod( "WritePoint", MethodAttributes::Public, void::typeid, nullptr );
ILGenerator^ writeStrIL = writeStrMthd->GetILGenerator();
// The below ILGenerator created demonstrates a few ways to create
// String* output through STDIN.
// ILGenerator::EmitWriteLine(String*) will generate a ldstr and a
// call to WriteLine for you.
writeStrIL->EmitWriteLine( "The value of this current instance is:" );
// Here, you will do the hard work yourself. First, you need to create
// the String* we will be passing and obtain the correct WriteLine overload
// for said String*. In the below case, you are substituting in two values,
// so the chosen overload is Console::WriteLine(String*, Object*, Object*).
String^ inStr = "( {0}, {1})";
array<Type^>^wlParams = {String::typeid,Object::typeid,Object::typeid};
// We need the MethodInfo to pass into EmitCall later.
MethodInfo^ writeLineMI = Console::typeid->GetMethod( "WriteLine", wlParams );
// Push the String* with the substitutions onto the stack.
// This is the first argument for WriteLine - the String* one.
writeStrIL->Emit( OpCodes::Ldstr, inStr );
// Since the second argument is an Object*, and it corresponds to
// to the substitution for the value of our integer field, you
// need to box that field to an Object*. First, push a reference
// to the current instance, and then push the value stored in
// field 'x'. We need the reference to the current instance (stored
// in local argument index 0) so Ldfld can load from the correct
// instance (this one).
writeStrIL->Emit( OpCodes::Ldarg_0 );
writeStrIL->Emit( OpCodes::Ldfld, xField );
// Now, we execute the box opcode, which pops the value of field 'x',
// returning a reference to the integer value boxed as an Object*.
writeStrIL->Emit( OpCodes::Box, int::typeid );
// Atop the stack, you'll find our String* inStr, followed by a reference
// to the boxed value of 'x'. Now, you need to likewise box field 'y'.
writeStrIL->Emit( OpCodes::Ldarg_0 );
writeStrIL->Emit( OpCodes::Ldfld, yField );
writeStrIL->Emit( OpCodes::Box, int::typeid );
// Now, you have all of the arguments for your call to
// Console::WriteLine(String*, Object*, Object*) atop the stack:
// the String* InStr, a reference to the boxed value of 'x', and
// a reference to the boxed value of 'y'.
// Call Console::WriteLine(String*, Object*, Object*) with EmitCall.
writeStrIL->EmitCall( OpCodes::Call, writeLineMI, nullptr );
// Lastly, EmitWriteLine can also output the value of a field
// using the overload EmitWriteLine(FieldInfo).
writeStrIL->EmitWriteLine( "The value of 'x' is:" );
writeStrIL->EmitWriteLine( xField );
writeStrIL->EmitWriteLine( "The value of 'y' is:" );
writeStrIL->EmitWriteLine( yField );
// Since we return no value (void), the ret opcode will not
// return the top stack value.
writeStrIL->Emit( OpCodes::Ret );
return pointTypeBld->CreateType();
}
int main()
{
array<Object^>^ctorParams = gcnew array<Object^>(2);
Console::Write( "Enter a integer value for X: " );
String^ myX = Console::ReadLine();
Console::Write( "Enter a integer value for Y: " );
String^ myY = Console::ReadLine();
Console::WriteLine( "---" );
ctorParams[ 0 ] = Convert::ToInt32( myX );
ctorParams[ 1 ] = Convert::ToInt32( myY );
Type^ ptType = CreateDynamicType();
Object^ ptInstance = Activator::CreateInstance( ptType, ctorParams );
ptType->InvokeMember( "WritePoint", BindingFlags::InvokeMethod, nullptr, ptInstance, gcnew array<Object^>(0) );
}
using System;
using System.Threading;
using System.Reflection;
using System.Reflection.Emit;
class EmitWriteLineDemo {
public static Type CreateDynamicType() {
Type[] ctorParams = new Type[] {typeof(int),
typeof(int)};
AppDomain myDomain = Thread.GetDomain();
AssemblyName myAsmName = new AssemblyName();
myAsmName.Name = "MyDynamicAssembly";
AssemblyBuilder myAsmBuilder = myDomain.DefineDynamicAssembly(
myAsmName,
AssemblyBuilderAccess.Run);
ModuleBuilder pointModule = myAsmBuilder.DefineDynamicModule("PointModule",
"Point.dll");
TypeBuilder pointTypeBld = pointModule.DefineType("Point",
TypeAttributes.Public);
FieldBuilder xField = pointTypeBld.DefineField("x", typeof(int),
FieldAttributes.Public);
FieldBuilder yField = pointTypeBld.DefineField("y", typeof(int),
FieldAttributes.Public);
Type objType = Type.GetType("System.Object");
ConstructorInfo objCtor = objType.GetConstructor(new Type[0]);
ConstructorBuilder pointCtor = pointTypeBld.DefineConstructor(
MethodAttributes.Public,
CallingConventions.Standard,
ctorParams);
ILGenerator ctorIL = pointCtor.GetILGenerator();
// First, you build the constructor.
ctorIL.Emit(OpCodes.Ldarg_0);
ctorIL.Emit(OpCodes.Call, objCtor);
ctorIL.Emit(OpCodes.Ldarg_0);
ctorIL.Emit(OpCodes.Ldarg_1);
ctorIL.Emit(OpCodes.Stfld, xField);
ctorIL.Emit(OpCodes.Ldarg_0);
ctorIL.Emit(OpCodes.Ldarg_2);
ctorIL.Emit(OpCodes.Stfld, yField);
ctorIL.Emit(OpCodes.Ret);
// Now, you'll build a method to output some information on the
// inside your dynamic class. This method will have the following
// definition in C#:
// public void WritePoint()
MethodBuilder writeStrMthd = pointTypeBld.DefineMethod(
"WritePoint",
MethodAttributes.Public,
typeof(void),
null);
ILGenerator writeStrIL = writeStrMthd.GetILGenerator();
// The below ILGenerator created demonstrates a few ways to create
// string output through STDIN.
// ILGenerator.EmitWriteLine(string) will generate a ldstr and a
// call to WriteLine for you.
writeStrIL.EmitWriteLine("The value of this current instance is:");
// Here, you will do the hard work yourself. First, you need to create
// the string we will be passing and obtain the correct WriteLine overload
// for said string. In the below case, you are substituting in two values,
// so the chosen overload is Console.WriteLine(string, object, object).
String inStr = "({0}, {1})";
Type[] wlParams = new Type[] {typeof(string),
typeof(object),
typeof(object)};
// We need the MethodInfo to pass into EmitCall later.
MethodInfo writeLineMI = typeof(Console).GetMethod(
"WriteLine",
wlParams);
// Push the string with the substitutions onto the stack.
// This is the first argument for WriteLine - the string one.
writeStrIL.Emit(OpCodes.Ldstr, inStr);
// Since the second argument is an object, and it corresponds to
// to the substitution for the value of our integer field, you
// need to box that field to an object. First, push a reference
// to the current instance, and then push the value stored in
// field 'x'. We need the reference to the current instance (stored
// in local argument index 0) so Ldfld can load from the correct
// instance (this one).
writeStrIL.Emit(OpCodes.Ldarg_0);
writeStrIL.Emit(OpCodes.Ldfld, xField);
// Now, we execute the box opcode, which pops the value of field 'x',
// returning a reference to the integer value boxed as an object.
writeStrIL.Emit(OpCodes.Box, typeof(int));
// Atop the stack, you'll find our string inStr, followed by a reference
// to the boxed value of 'x'. Now, you need to likewise box field 'y'.
writeStrIL.Emit(OpCodes.Ldarg_0);
writeStrIL.Emit(OpCodes.Ldfld, yField);
writeStrIL.Emit(OpCodes.Box, typeof(int));
// Now, you have all of the arguments for your call to
// Console.WriteLine(string, object, object) atop the stack:
// the string InStr, a reference to the boxed value of 'x', and
// a reference to the boxed value of 'y'.
// Call Console.WriteLine(string, object, object) with EmitCall.
writeStrIL.EmitCall(OpCodes.Call, writeLineMI, null);
// Lastly, EmitWriteLine can also output the value of a field
// using the overload EmitWriteLine(FieldInfo).
writeStrIL.EmitWriteLine("The value of 'x' is:");
writeStrIL.EmitWriteLine(xField);
writeStrIL.EmitWriteLine("The value of 'y' is:");
writeStrIL.EmitWriteLine(yField);
// Since we return no value (void), the ret opcode will not
// return the top stack value.
writeStrIL.Emit(OpCodes.Ret);
return pointTypeBld.CreateType();
}
public static void Main() {
object[] ctorParams = new object[2];
Console.Write("Enter a integer value for X: ");
string myX = Console.ReadLine();
Console.Write("Enter a integer value for Y: ");
string myY = Console.ReadLine();
Console.WriteLine("---");
ctorParams[0] = Convert.ToInt32(myX);
ctorParams[1] = Convert.ToInt32(myY);
Type ptType = CreateDynamicType();
object ptInstance = Activator.CreateInstance(ptType, ctorParams);
ptType.InvokeMember("WritePoint",
BindingFlags.InvokeMethod,
null,
ptInstance,
new object[0]);
}
}
Imports System.Threading
Imports System.Reflection
Imports System.Reflection.Emit
_
Class EmitWriteLineDemo
Public Shared Function CreateDynamicType() As Type
Dim ctorParams() As Type = {GetType(Integer), GetType(Integer)}
Dim myDomain As AppDomain = Thread.GetDomain()
Dim myAsmName As New AssemblyName()
myAsmName.Name = "MyDynamicAssembly"
Dim myAsmBuilder As AssemblyBuilder = myDomain.DefineDynamicAssembly(myAsmName, AssemblyBuilderAccess.RunAndSave)
Dim pointModule As ModuleBuilder = myAsmBuilder.DefineDynamicModule("PointModule", "Point.dll")
Dim pointTypeBld As TypeBuilder = pointModule.DefineType("Point", _
TypeAttributes.Public)
Dim xField As FieldBuilder = pointTypeBld.DefineField("x", _
GetType(Integer), _
FieldAttributes.Public)
Dim yField As FieldBuilder = pointTypeBld.DefineField("y", _
GetType(Integer), _
FieldAttributes.Public)
Dim objType As Type = Type.GetType("System.Object")
Dim objCtor As ConstructorInfo = objType.GetConstructor(New Type(){})
Dim pointCtor As ConstructorBuilder = pointTypeBld.DefineConstructor( _
MethodAttributes.Public, _
CallingConventions.Standard, _
ctorParams)
Dim ctorIL As ILGenerator = pointCtor.GetILGenerator()
' First, you build the constructor.
ctorIL.Emit(OpCodes.Ldarg_0)
ctorIL.Emit(OpCodes.Call, objCtor)
ctorIL.Emit(OpCodes.Ldarg_0)
ctorIL.Emit(OpCodes.Ldarg_1)
ctorIL.Emit(OpCodes.Stfld, xField)
ctorIL.Emit(OpCodes.Ldarg_0)
ctorIL.Emit(OpCodes.Ldarg_2)
ctorIL.Emit(OpCodes.Stfld, yField)
ctorIL.Emit(OpCodes.Ret)
' Now, you'll build a method to output some information on the
' inside your dynamic class. This method will have the following
' definition in C#:
' Public Sub WritePoint()
Dim writeStrMthd As MethodBuilder = pointTypeBld.DefineMethod("WritePoint", _
MethodAttributes.Public, _
Nothing, Nothing)
Dim writeStrIL As ILGenerator = writeStrMthd.GetILGenerator()
' The below ILGenerator created demonstrates a few ways to create
' string output through STDIN.
' ILGenerator.EmitWriteLine(string) will generate a ldstr and a
' call to WriteLine for you.
writeStrIL.EmitWriteLine("The value of this current instance is:")
' Here, you will do the hard work yourself. First, you need to create
' the string we will be passing and obtain the correct WriteLine overload
' for said string. In the below case, you are substituting in two values,
' so the chosen overload is Console.WriteLine(string, object, object).
Dim inStr As [String] = "({0}, {1})"
Dim wlParams() As Type = {GetType(String), GetType(Object), GetType(Object)}
' We need the MethodInfo to pass into EmitCall later.
Dim writeLineMI As MethodInfo = GetType(Console).GetMethod("WriteLine", wlParams)
' Push the string with the substitutions onto the stack.
' This is the first argument for WriteLine - the string one.
writeStrIL.Emit(OpCodes.Ldstr, inStr)
' Since the second argument is an object, and it corresponds to
' to the substitution for the value of our integer field, you
' need to box that field to an object. First, push a reference
' to the current instance, and then push the value stored in
' field 'x'. We need the reference to the current instance (stored
' in local argument index 0) so Ldfld can load from the correct
' instance (this one).
writeStrIL.Emit(OpCodes.Ldarg_0)
writeStrIL.Emit(OpCodes.Ldfld, xField)
' Now, we execute the box opcode, which pops the value of field 'x',
' returning a reference to the integer value boxed as an object.
writeStrIL.Emit(OpCodes.Box, GetType(Integer))
' Atop the stack, you'll find our string inStr, followed by a reference
' to the boxed value of 'x'. Now, you need to likewise box field 'y'.
writeStrIL.Emit(OpCodes.Ldarg_0)
writeStrIL.Emit(OpCodes.Ldfld, yField)
writeStrIL.Emit(OpCodes.Box, GetType(Integer))
' Now, you have all of the arguments for your call to
' Console.WriteLine(string, object, object) atop the stack:
' the string InStr, a reference to the boxed value of 'x', and
' a reference to the boxed value of 'y'.
' Call Console.WriteLine(string, object, object) with EmitCall.
writeStrIL.EmitCall(OpCodes.Call, writeLineMI, Nothing)
' Lastly, EmitWriteLine can also output the value of a field
' using the overload EmitWriteLine(FieldInfo).
writeStrIL.EmitWriteLine("The value of 'x' is:")
writeStrIL.EmitWriteLine(xField)
writeStrIL.EmitWriteLine("The value of 'y' is:")
writeStrIL.EmitWriteLine(yField)
' Since we return no value (void), the ret opcode will not
' return the top stack value.
writeStrIL.Emit(OpCodes.Ret)
Return pointTypeBld.CreateType()
End Function 'CreateDynamicType
Public Shared Sub Main()
Dim ctorParams(1) As Object
Console.Write("Enter a integer value for X: ")
Dim myX As String = Console.ReadLine()
Console.Write("Enter a integer value for Y: ")
Dim myY As String = Console.ReadLine()
Console.WriteLine("---")
ctorParams(0) = Convert.ToInt32(myX)
ctorParams(1) = Convert.ToInt32(myY)
Dim ptType As Type = CreateDynamicType()
Dim ptInstance As Object = Activator.CreateInstance(ptType, ctorParams)
ptType.InvokeMember("WritePoint", _
BindingFlags.InvokeMethod, _
Nothing, ptInstance, Nothing)
End Sub
End Class
설명
의 localBuilder 형식은 메서드 오버로드 Console.WriteLine 의 매개 변수 형식과 일치해야 합니다.
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