MethodBuilder.CreateMethodBody(Byte[], Int32) Metode

Definisi

Ruang nama:

System.Reflection.Emit

Rakitan:

mscorlib.dll

Membuat isi metode menggunakan array byte yang disediakan dari instruksi Microsoft intermediate language (MSIL).

public:
 void CreateMethodBody(cli::array <System::Byte> ^ il, int count);

public void CreateMethodBody (byte[] il, int count);

member this.CreateMethodBody : byte[] * int -> unit

Public Sub CreateMethodBody (il As Byte(), count As Integer)

Parameter

il

Byte[]

Array yang berisi instruksi MSIL yang valid. Jika parameter ini adalah null, isi metode akan dibersihkan.

count

Int32

Jumlah byte yang valid dalam array MSIL. Nilai ini diabaikan jika MSIL adalah null.

Pengecualian

ArgumentOutOfRangeException

count tidak berada dalam rentang indeks array instruksi MSIL yang disediakan dan il bukan null.

InvalidOperationException

Jenis yang berisi sebelumnya dibuat menggunakan CreateType().

-atau-

Metode ini dipanggil sebelumnya pada ini MethodBuilder dengan il argumen yang bukan null.

-atau-

Untuk metode saat ini, IsGenericMethod properti adalah true, tetapi IsGenericMethodDefinition propertinya adalah false.

Contoh

Dalam contoh yang disediakan di bawah ini, metode sederhana yang menambahkan dua bilangan bulat dihasilkan melalui opcode menggunakan CreateMethodBody.

using namespace System;
using namespace System::Threading;
using namespace System::Reflection;
using namespace System::Reflection::Emit;
class MethodBodyDemo
{
public:

   // This class will demonstrate how to create a method body using
   // the MethodBuilder::CreateMethodBody(Byte[], int) method.
   static Type^ BuildDynType()
   {
      Type^ addType = nullptr;
      AppDomain^ currentDom = Thread::GetDomain();
      AssemblyName^ myAsmName = gcnew AssemblyName;
      myAsmName->Name = "MyDynamicAssembly";
      AssemblyBuilder^ myAsmBldr = currentDom->DefineDynamicAssembly( myAsmName, AssemblyBuilderAccess::RunAndSave );
      
      // The dynamic assembly space has been created.  Next, create a module
      // within it.  The type Point will be reflected into this module.
      ModuleBuilder^ myModuleBldr = myAsmBldr->DefineDynamicModule( "MyModule" );
      TypeBuilder^ myTypeBldr = myModuleBldr->DefineType( "Adder" );
      array<Type^>^temp0 = {int::typeid,int::typeid};
      MethodBuilder^ myMthdBldr = myTypeBldr->DefineMethod( "DoAdd", static_cast<MethodAttributes>(MethodAttributes::Public | MethodAttributes::Static), int::typeid, temp0 );
      
      // Build the array of Bytes holding the MSIL instructions.
      
      /* 02h is the opcode for ldarg.0 */
      /* 03h is the opcode for ldarg.1 */
      /* 58h is the opcode for add     */
      /* 2Ah is the opcode for ret     */
      array<Byte>^temp1 = {0x02,0x03,0x58,0x2A};
      array<Byte>^ILcodes = temp1;
      myMthdBldr->CreateMethodBody( ILcodes, ILcodes->Length );
      addType = myTypeBldr->CreateType();
      return addType;
   }

};

int main()
{
   Type^ myType = MethodBodyDemo::BuildDynType();
   Console::WriteLine( "---" );
   Console::Write( "Enter the first integer to add: " );
   int aVal = Convert::ToInt32( Console::ReadLine() );
   Console::Write( "Enter the second integer to add: " );
   int bVal = Convert::ToInt32( Console::ReadLine() );
   Object^ adderInst = Activator::CreateInstance( myType, gcnew array<Object^>(0) );
   array<Object^>^temp1 = {aVal,bVal};
   Console::WriteLine( "The value of adding {0} to {1} is: {2}.", aVal, bVal, myType->InvokeMember( "DoAdd", BindingFlags::InvokeMethod, nullptr, adderInst, temp1 ) );
}

using System;
using System.Threading;
using System.Reflection;
using System.Reflection.Emit;

class MethodBodyDemo {
// This class will demonstrate how to create a method body using
// the MethodBuilder.CreateMethodBody(byte[], int) method.

   public static Type BuildDynType() {

    Type addType = null;

        AppDomain currentDom = Thread.GetDomain();

        AssemblyName myAsmName = new AssemblyName();
    myAsmName.Name = "MyDynamicAssembly";

        AssemblyBuilder myAsmBldr = currentDom.DefineDynamicAssembly(
                           myAsmName,
                           AssemblyBuilderAccess.RunAndSave);

        // The dynamic assembly space has been created.  Next, create a module
        // within it.  The type Point will be reflected into this module.

    ModuleBuilder myModuleBldr = myAsmBldr.DefineDynamicModule("MyModule");

    TypeBuilder myTypeBldr =  myModuleBldr.DefineType("Adder");

        MethodBuilder myMthdBldr = myTypeBldr.DefineMethod("DoAdd",
                                MethodAttributes.Public |
                                MethodAttributes.Static,
                                typeof(int),
                                new Type[]
                                {typeof(int), typeof(int)});
        // Build the array of Bytes holding the MSIL instructions.

        byte[] ILcodes = new byte[] {
          0x02,   /* 02h is the opcode for ldarg.0 */
      0x03,   /* 03h is the opcode for ldarg.1 */
      0x58,   /* 58h is the opcode for add     */
      0x2A    /* 2Ah is the opcode for ret     */
    };
    
    myMthdBldr.CreateMethodBody(ILcodes, ILcodes.Length);

        addType = myTypeBldr.CreateType();

    return addType;
   }

   public static void Main() {

    Type myType = BuildDynType();
        Console.WriteLine("---");
    Console.Write("Enter the first integer to add: ");
        int aVal = Convert.ToInt32(Console.ReadLine());

        Console.Write("Enter the second integer to add: ");
        int bVal = Convert.ToInt32(Console.ReadLine());

        object adderInst = Activator.CreateInstance(myType, new object[0]);

    Console.WriteLine("The value of adding {0} to {1} is: {2}.",
               aVal, bVal,	
                   myType.InvokeMember("DoAdd",
                           BindingFlags.InvokeMethod,
                           null,
                           adderInst,
                           new object[] {aVal, bVal}));
   }
}

Imports System.Threading
Imports System.Reflection
Imports System.Reflection.Emit

 _

Class MethodBodyDemo
   
   ' This class will demonstrate how to create a method body using 
   ' the MethodBuilder.CreateMethodBody(byte[], int) method.

   Public Shared Function BuildDynType() As Type
      
      Dim addType As Type = Nothing
      
      Dim currentDom As AppDomain = Thread.GetDomain()
      
      Dim myAsmName As New AssemblyName()
      myAsmName.Name = "MyDynamicAssembly"
      
      Dim myAsmBldr As AssemblyBuilder = currentDom.DefineDynamicAssembly(myAsmName, _
                         AssemblyBuilderAccess.RunAndSave)
      
      ' The dynamic assembly space has been created.  Next, create a module
      ' within it.  The type Point will be reflected into this module.
      Dim myModuleBldr As ModuleBuilder = myAsmBldr.DefineDynamicModule("MyModule")
      
      Dim myTypeBldr As TypeBuilder = myModuleBldr.DefineType("Adder")
      
      Dim myMthdBldr As MethodBuilder = myTypeBldr.DefineMethod("DoAdd", _
                    MethodAttributes.Public Or MethodAttributes.Static, _
                        GetType(Integer), _
                    New Type() {GetType(Integer), GetType(Integer)})

      ' Build the array of Bytes holding the MSIL instructions.

      Dim ILcodes() As Byte = {&H2, &H3, &H58, &H2A}

      ' 02h is the opcode for ldarg.0 
      ' 03h is the opcode for ldarg.1 
      ' 58h is the opcode for add     
      ' 2Ah is the opcode for ret     
      
      myMthdBldr.CreateMethodBody(ILcodes, ILcodes.Length)
      
      addType = myTypeBldr.CreateType()
      
      Return addType

   End Function 'BuildDynType
   
   
   Public Shared Sub Main()
      
      Dim myType As Type = BuildDynType()
      Console.WriteLine("---")
      Console.Write("Enter the first integer to add: ")
      Dim aVal As Integer = Convert.ToInt32(Console.ReadLine())
      
      Console.Write("Enter the second integer to add: ")
      Dim bVal As Integer = Convert.ToInt32(Console.ReadLine())
      
      Dim adderInst As Object = Activator.CreateInstance(myType, New Object() {})
      
      Console.WriteLine("The value of adding {0} to {1} is: {2}.", _
             aVal, bVal, _
             myType.InvokeMember("DoAdd", _
                          BindingFlags.InvokeMethod, _
                          Nothing, _
                          adderInst, _
                          New Object() {aVal, bVal}))

   End Sub

End Class

Keterangan

Metode ini membuat isi metode dari il, array yang berisi instruksi MSIL sebagai opcode. Jumlah byte MSIL yang valid diberikan berdasarkan hitungan.

Catatan

Ini saat ini tidak didukung sepenuhnya. Pengguna tidak dapat menyediakan lokasi perbaikan token dan penangan pengecualian.