TypeBuilder.DefineConstructor 方法

定义

命名空间:: System.Reflection.Emit

程序集:: netstandard.dll, System.Reflection.Emit.dll

程序集:: System.Reflection.Emit.dll

程序集:: mscorlib.dll

程序集:: netstandard.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

将新的构造函数添加到动态类型。

重载

名称	说明
DefineConstructor(MethodAttributes, CallingConventions, Type[])	使用给定的属性和签名向类型添加新构造函数。
DefineConstructor(MethodAttributes, CallingConventions, Type[], Type[][], Type[][])	使用给定的属性、签名和自定义修饰符向类型添加新构造函数。

DefineConstructor(MethodAttributes, CallingConventions, Type[])

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

使用给定的属性和签名向类型添加新构造函数。

public:
 System::Reflection::Emit::ConstructorBuilder ^ DefineConstructor(System::Reflection::MethodAttributes attributes, System::Reflection::CallingConventions callingConvention, cli::array <Type ^> ^ parameterTypes);

public System.Reflection.Emit.ConstructorBuilder DefineConstructor(System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, Type[]? parameterTypes);

public System.Reflection.Emit.ConstructorBuilder DefineConstructor(System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, Type[] parameterTypes);

[System.Runtime.InteropServices.ComVisible(true)]
public System.Reflection.Emit.ConstructorBuilder DefineConstructor(System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, Type[] parameterTypes);

member this.DefineConstructor : System.Reflection.MethodAttributes * System.Reflection.CallingConventions * Type[] -> System.Reflection.Emit.ConstructorBuilder

[<System.Runtime.InteropServices.ComVisible(true)>]
member this.DefineConstructor : System.Reflection.MethodAttributes * System.Reflection.CallingConventions * Type[] -> System.Reflection.Emit.ConstructorBuilder

Public Function DefineConstructor (attributes As MethodAttributes, callingConvention As CallingConventions, parameterTypes As Type()) As ConstructorBuilder

参数

attributes: MethodAttributes

构造函数的属性。

callingConvention: CallingConventions

构造函数的调用约定。

parameterTypes: Type[]

构造函数的参数类型。

ConstructorBuilder

定义的构造函数。

属性: ComVisibleAttribute

例外

InvalidOperationException

该类型以前是使用 CreateType().

示例

下面的代码示例演示如何在 DefineConstructor 动态类型上设置构造函数的特定签名和属性，并返回对应于 ConstructorBuilder MSIL 填充。

// Define the constructor.
Type[] constructorArgs = { typeof(String) };
ConstructorBuilder myConstructorBuilder =
   helloWorldTypeBuilder.DefineConstructor(MethodAttributes.Public,
                      CallingConventions.Standard, constructorArgs);
// Generate IL for the method. The constructor stores its argument in the private field.
ILGenerator myConstructorIL = myConstructorBuilder.GetILGenerator();
myConstructorIL.Emit(OpCodes.Ldarg_0);
myConstructorIL.Emit(OpCodes.Ldarg_1);
myConstructorIL.Emit(OpCodes.Stfld, myGreetingField);
myConstructorIL.Emit(OpCodes.Ret);

' Define the constructor.
Dim constructorArgs As Type() = {GetType(String)}
Dim myConstructorBuilder As ConstructorBuilder = helloWorldTypeBuilder.DefineConstructor _
                     (MethodAttributes.Public, CallingConventions.Standard, constructorArgs)
' Generate IL for the method. The constructor stores its argument in the private field.
Dim myConstructorIL As ILGenerator = myConstructorBuilder.GetILGenerator()
myConstructorIL.Emit(OpCodes.Ldarg_0)
myConstructorIL.Emit(OpCodes.Ldarg_1)
myConstructorIL.Emit(OpCodes.Stfld, myGreetingField)
myConstructorIL.Emit(OpCodes.Ret)

注解

如果未为动态类型定义构造函数，则会自动提供无参数构造函数，并调用基类的无参数构造函数。

如果为动态类型定义构造函数，则不提供无参数构造函数。除了定义的构造函数之外，还可以使用以下选项来提供无参数构造函数：

如果想要仅调用基类的无参数构造函数的无参数构造函数，可以使用 DefineDefaultConstructor 该方法创建一个（并选择性地限制对它的访问）。不为此无参数构造函数提供实现。如果这样做，尝试使用构造函数时将引发异常。调用方法时 CreateType 不会引发异常。
如果想要一个无参数构造函数，其执行操作不仅仅是调用基类的无参数构造函数，或者调用基类的另一个构造函数，或者完全执行其他操作，则必须使用 TypeBuilder.DefineConstructor 该方法创建一个构造函数，并提供你自己的实现。

适用于

DefineConstructor(MethodAttributes, CallingConventions, Type[], Type[][], Type[][])

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

使用给定的属性、签名和自定义修饰符向类型添加新构造函数。

public:
 System::Reflection::Emit::ConstructorBuilder ^ DefineConstructor(System::Reflection::MethodAttributes attributes, System::Reflection::CallingConventions callingConvention, cli::array <Type ^> ^ parameterTypes, cli::array <cli::array <Type ^> ^> ^ requiredCustomModifiers, cli::array <cli::array <Type ^> ^> ^ optionalCustomModifiers);

public System.Reflection.Emit.ConstructorBuilder DefineConstructor(System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, Type[]? parameterTypes, Type[][]? requiredCustomModifiers, Type[][]? optionalCustomModifiers);

public System.Reflection.Emit.ConstructorBuilder DefineConstructor(System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, Type[] parameterTypes, Type[][] requiredCustomModifiers, Type[][] optionalCustomModifiers);

[System.Runtime.InteropServices.ComVisible(true)]
public System.Reflection.Emit.ConstructorBuilder DefineConstructor(System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, Type[] parameterTypes, Type[][] requiredCustomModifiers, Type[][] optionalCustomModifiers);

member this.DefineConstructor : System.Reflection.MethodAttributes * System.Reflection.CallingConventions * Type[] * Type[][] * Type[][] -> System.Reflection.Emit.ConstructorBuilder

[<System.Runtime.InteropServices.ComVisible(true)>]
member this.DefineConstructor : System.Reflection.MethodAttributes * System.Reflection.CallingConventions * Type[] * Type[][] * Type[][] -> System.Reflection.Emit.ConstructorBuilder

Public Function DefineConstructor (attributes As MethodAttributes, callingConvention As CallingConventions, parameterTypes As Type(), requiredCustomModifiers As Type()(), optionalCustomModifiers As Type()()) As ConstructorBuilder