ILGenerator.EmitCalli 方法

定义

命名空间:

System.Reflection.Emit

程序集:

System.Reflection.Emit.ILGeneration.dll

将 Calli 指令放到 Microsoft 中间语言 (MSIL) 流上。

重载

EmitCalli(OpCode, CallingConvention, Type, Type[])	将 Calli 指令放到 Microsoft 中间语言 (MSIL) 流，并指定间接调用的非托管调用约定。
EmitCalli(OpCode, CallingConventions, Type, Type[], Type[])	将 Calli 指令放到 Microsoft 中间语言 (MSIL) 流，并指定间接调用的托管调用约定。

EmitCalli(OpCode, CallingConvention, Type, Type[])

Source:

ILGenerator.cs

将 Calli 指令放到 Microsoft 中间语言 (MSIL) 流，并指定间接调用的非托管调用约定。

public:
 abstract void EmitCalli(System::Reflection::Emit::OpCode opcode, System::Runtime::InteropServices::CallingConvention unmanagedCallConv, Type ^ returnType, cli::array <Type ^> ^ parameterTypes);

public abstract void EmitCalli (System.Reflection.Emit.OpCode opcode, System.Runtime.InteropServices.CallingConvention unmanagedCallConv, Type? returnType, Type[]? parameterTypes);

abstract member EmitCalli : System.Reflection.Emit.OpCode * System.Runtime.InteropServices.CallingConvention * Type * Type[] -> unit

Public MustOverride Sub EmitCalli (opcode As OpCode, unmanagedCallConv As CallingConvention, returnType As Type, parameterTypes As Type())

参数

opcode

OpCode

要发出到流的 MSIL 指令。 必须是 Calli。

unmanagedCallConv

CallingConvention

要使用的非托管调用约定。

returnType

Type

结果的 Type。

parameterTypes

Type[]

指令的必选参数的类型。

示例

下面的代码示例演示了 方法的 EmitCalli 上下文用法，以调用动态类外部的非托管类型方法。

MethodBuilder^ myMthdBuilder = myTypeBuilder->DefineMethod( "MyMethod",
                               MethodAttributes::Public,
                               returnType, mthdParamTypes );

// We will assume that an external unmanaged type "LegacyNumber" has been loaded, and
// that it has a method "ToString" which returns a String.

MethodInfo^ unmanagedMthdMI = Type::GetType( "LegacyNumber" )->GetMethod( "ToString" );
ILGenerator^ myMthdIL = myMthdBuilder->GetILGenerator();

// Code to emit various IL opcodes here ...

// Load a reference to the specific Object instance onto the stack.

myMthdIL->Emit( OpCodes::Ldc_I4, addrOfLegacyNumberObject );
myMthdIL->Emit( OpCodes::Ldobj, Type::GetType( "LegacyNumber" ) );

// Make the call to the unmanaged type method, telling it that the method is
// the member of a specific instance, to expect a String
// as a return value, and that there are no explicit parameters.
myMthdIL->EmitCalli( OpCodes::Calli,
                     System::Runtime::InteropServices::CallingConvention::ThisCall,
                     String::typeid,
                     gcnew array<Type^>( 0 ) );

// More IL code emission here ...

MethodBuilder myMthdBuilder = myTypeBuilder.DefineMethod("MyMethod",
                  MethodAttributes.Public,
                  returnType, mthdParamTypes);
                            
// We will assume that an external unmanaged type "LegacyNumber" has been loaded, and
// that it has a method "ToString" which returns a string.

MethodInfo unmanagedMthdMI = Type.GetType("LegacyNumber").GetMethod("ToString");
ILGenerator myMthdIL = myMthdBuilder.GetILGenerator();

// Code to emit various IL opcodes here ...

// Load a reference to the specific object instance onto the stack.

myMthdIL.Emit(OpCodes.Ldc_I4, addrOfLegacyNumberObject);
myMthdIL.Emit(OpCodes.Ldobj, Type.GetType("LegacyNumber"));

// Make the call to the unmanaged type method, telling it that the method is
// the member of a specific instance, to expect a string
// as a return value, and that there are no explicit parameters.
myMthdIL.EmitCalli(OpCodes.Calli,
           System.Runtime.InteropServices.CallingConvention.ThisCall,
               typeof(string),
           new Type[] {});

// More IL code emission here ...

    Dim myMthdBuilder As MethodBuilder = myTypeBuilder.DefineMethod("MyMethod", _
                    MethodAttributes.Public, _
                    returnType, mthdParamTypes)
  
    ' We will assume that an external unmanaged type "LegacyNumber" has been loaded, and
    ' that it has a method "ToString" which returns a string.

    Dim unmanagedMthdMI As MethodInfo = Type.GetType("LegacyNumber").GetMethod("ToString")
    Dim myMthdIL As ILGenerator = myMthdBuilder.GetILGenerator()
  
    ' Code to emit various IL opcodes here ...
    ' Load a reference to the specific object instance onto the stack.

    myMthdIL.Emit(OpCodes.Ldc_I4, addrOfLegacyNumberObject)
    myMthdIL.Emit(OpCodes.Ldobj, Type.GetType("LegacyNumber"))
  
    ' Make the call to the unmanaged type method, telling it that the method is
    ' the member of a specific instance, to expect a string 
    ' as a return value, and that there are no explicit parameters.

    myMthdIL.EmitCalli(OpCodes.Calli, System.Runtime.InteropServices.CallingConvention.ThisCall, _
                  GetType(String), New Type() {})

' More IL code emission here ...

注解

使用 EmitCalli 将指令放入 Calli 流中。 请勿使用 Emit。

EmitCalli(OpCode, CallingConventions, Type, Type[], Type[])

Source:

ILGenerator.cs

将 Calli 指令放到 Microsoft 中间语言 (MSIL) 流，并指定间接调用的托管调用约定。

public:
 abstract void EmitCalli(System::Reflection::Emit::OpCode opcode, System::Reflection::CallingConventions callingConvention, Type ^ returnType, cli::array <Type ^> ^ parameterTypes, cli::array <Type ^> ^ optionalParameterTypes);

public abstract void EmitCalli (System.Reflection.Emit.OpCode opcode, System.Reflection.CallingConventions callingConvention, Type? returnType, Type[]? parameterTypes, Type[]? optionalParameterTypes);

abstract member EmitCalli : System.Reflection.Emit.OpCode * System.Reflection.CallingConventions * Type * Type[] * Type[] -> unit

Public MustOverride Sub EmitCalli (opcode As OpCode, callingConvention As CallingConventions, returnType As Type, parameterTypes As Type(), optionalParameterTypes As Type())

参数

opcode

OpCode

要发出到流的 MSIL 指令。 必须是 Calli。

callingConvention

CallingConventions

要使用的托管调用约定。

returnType

Type

结果的 Type。

parameterTypes

Type[]

指令的必选参数的类型。

optionalParameterTypes

Type[]

varargs 调用的可选参数的类型。

例外

InvalidOperationException

optionalParameterTypes 不为 null，但 callingConvention 不包括 VarArgs 标志。

注解

使用 EmitCalli 将指令放入 Calli 流中。 请勿使用 Emit。

如果 optionalParameterTypes 指定了可选参数， callingConvention 则必须包含 CallingConventions.VarArgs 标志。