TypeBuilder.DefineProperty 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。

向类型添加新属性。

重载

名称	说明
DefineProperty(String, PropertyAttributes, Type, Type[])	使用给定名称和属性签名向类型添加新属性。
DefineProperty(String, PropertyAttributes, CallingConventions, Type, Type[])	向类型添加新属性，其中包含给定的名称、属性、调用约定和属性签名。
DefineProperty(String, PropertyAttributes, Type, Type[], Type[], Type[], Type[][], Type[][])	向类型中添加一个新属性，其中包含给定的名称、属性签名和自定义修饰符。
DefineProperty(String, PropertyAttributes, CallingConventions, Type, Type[], Type[], Type[], Type[][], Type[][])	向类型添加新属性，其中包含给定的名称、调用约定、属性签名和自定义修饰符。

DefineProperty(String, PropertyAttributes, Type, Type[])

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

使用给定名称和属性签名向类型添加新属性。

public:
 System::Reflection::Emit::PropertyBuilder ^ DefineProperty(System::String ^ name, System::Reflection::PropertyAttributes attributes, Type ^ returnType, cli::array <Type ^> ^ parameterTypes);

public System.Reflection.Emit.PropertyBuilder DefineProperty(string name, System.Reflection.PropertyAttributes attributes, Type? returnType, Type[]? parameterTypes);

public System.Reflection.Emit.PropertyBuilder DefineProperty(string name, System.Reflection.PropertyAttributes attributes, Type returnType, Type[]? parameterTypes);

public System.Reflection.Emit.PropertyBuilder DefineProperty(string name, System.Reflection.PropertyAttributes attributes, Type returnType, Type[] parameterTypes);

member this.DefineProperty : string * System.Reflection.PropertyAttributes * Type * Type[] -> System.Reflection.Emit.PropertyBuilder

Public Function DefineProperty (name As String, attributes As PropertyAttributes, returnType As Type, parameterTypes As Type()) As PropertyBuilder

参数

name: String

属性的名称。 name 不能包含嵌入的 null。

attributes: PropertyAttributes

属性的属性。

returnType: Type

属性的返回类型。

parameterTypes: Type[]

属性的参数的类型。

PropertyBuilder

定义的属性。

例外

ArgumentException

长度 name 为零。

ArgumentNullException

name 是 null。

-或-

数组的任何元素 parameterTypes 都是 null。

InvalidOperationException

该类型以前是使用 CreateType().

示例

下面的代码示例演示如何定义动态属性并获取 PropertyBuilder 规范。请注意，还必须 PropertyBuilder 具有相应的 MethodBuilder属性，该逻辑将容纳该属性的 IL 逻辑。

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

class PropertyBuilderDemo
{
   public static Type BuildDynamicTypeWithProperties()
   {
        AppDomain myDomain = Thread.GetDomain();
        AssemblyName myAsmName = new AssemblyName();
        myAsmName.Name = "MyDynamicAssembly";

        // To generate a persistable assembly, specify AssemblyBuilderAccess.RunAndSave.
        AssemblyBuilder myAsmBuilder = myDomain.DefineDynamicAssembly(myAsmName,
                                                        AssemblyBuilderAccess.RunAndSave);
        // Generate a persistable single-module assembly.
        ModuleBuilder myModBuilder =
            myAsmBuilder.DefineDynamicModule(myAsmName.Name, myAsmName.Name + ".dll");

        TypeBuilder myTypeBuilder = myModBuilder.DefineType("CustomerData",
                                                        TypeAttributes.Public);

        FieldBuilder customerNameBldr = myTypeBuilder.DefineField("customerName",
                                                        typeof(string),
                                                        FieldAttributes.Private);

        // The last argument of DefineProperty is null, because the
        // property has no parameters. (If you don't specify null, you must
        // specify an array of Type objects. For a parameterless property,
        // use an array with no elements: new Type[] {})
        PropertyBuilder custNamePropBldr = myTypeBuilder.DefineProperty("CustomerName",
                                                         PropertyAttributes.HasDefault,
                                                         typeof(string),
                                                         null);

        // The property set and property get methods require a special
        // set of attributes.
        MethodAttributes getSetAttr =
            MethodAttributes.Public | MethodAttributes.SpecialName |
                MethodAttributes.HideBySig;

        // Define the "get" accessor method for CustomerName.
        MethodBuilder custNameGetPropMthdBldr =
            myTypeBuilder.DefineMethod("get_CustomerName",
                                       getSetAttr,
                                       typeof(string),
                                       Type.EmptyTypes);

        ILGenerator custNameGetIL = custNameGetPropMthdBldr.GetILGenerator();

        custNameGetIL.Emit(OpCodes.Ldarg_0);
        custNameGetIL.Emit(OpCodes.Ldfld, customerNameBldr);
        custNameGetIL.Emit(OpCodes.Ret);

        // Define the "set" accessor method for CustomerName.
        MethodBuilder custNameSetPropMthdBldr =
            myTypeBuilder.DefineMethod("set_CustomerName",
                                       getSetAttr,
                                       null,
                                       new Type[] { typeof(string) });

        ILGenerator custNameSetIL = custNameSetPropMthdBldr.GetILGenerator();

        custNameSetIL.Emit(OpCodes.Ldarg_0);
        custNameSetIL.Emit(OpCodes.Ldarg_1);
        custNameSetIL.Emit(OpCodes.Stfld, customerNameBldr);
        custNameSetIL.Emit(OpCodes.Ret);

        // Last, we must map the two methods created above to our PropertyBuilder to
        // their corresponding behaviors, "get" and "set" respectively.
        custNamePropBldr.SetGetMethod(custNameGetPropMthdBldr);
        custNamePropBldr.SetSetMethod(custNameSetPropMthdBldr);

        Type retval = myTypeBuilder.CreateType();

        // Save the assembly so it can be examined with Ildasm.exe,
        // or referenced by a test program.
        myAsmBuilder.Save(myAsmName.Name + ".dll");
        return retval;
   }

   public static void Main()
   {
        Type custDataType = BuildDynamicTypeWithProperties();

        PropertyInfo[] custDataPropInfo = custDataType.GetProperties();
        foreach (PropertyInfo pInfo in custDataPropInfo) {
           Console.WriteLine("Property '{0}' created!", pInfo.ToString());
        }

        Console.WriteLine("---");
        // Note that when invoking a property, you need to use the proper BindingFlags -
        // BindingFlags.SetProperty when you invoke the "set" behavior, and
        // BindingFlags.GetProperty when you invoke the "get" behavior. Also note that
        // we invoke them based on the name we gave the property, as expected, and not
        // the name of the methods we bound to the specific property behaviors.

        object custData = Activator.CreateInstance(custDataType);
        custDataType.InvokeMember("CustomerName", BindingFlags.SetProperty,
                                      null, custData, new object[]{ "Joe User" });

        Console.WriteLine("The customerName field of instance custData has been set to '{0}'.",
                           custDataType.InvokeMember("CustomerName", BindingFlags.GetProperty,
                                                      null, custData, new object[]{ }));
   }
}

// --- O U T P U T ---
// The output should be as follows:
// -------------------
// Property 'System.String CustomerName' created!
// ---
// The customerName field of instance custData has been set to 'Joe User'.
// -------------------

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

Class PropertyBuilderDemo
   
   Public Shared Function BuildDynamicTypeWithProperties() As Type
      Dim myDomain As AppDomain = Thread.GetDomain()
      Dim myAsmName As New AssemblyName()
      myAsmName.Name = "MyDynamicAssembly"
      
      ' To generate a persistable assembly, specify AssemblyBuilderAccess.RunAndSave.
      Dim myAsmBuilder As AssemblyBuilder = myDomain.DefineDynamicAssembly(myAsmName, _
                                                        AssemblyBuilderAccess.RunAndSave)
      
      ' Generate a persistable, single-module assembly.
      Dim myModBuilder As ModuleBuilder = _
          myAsmBuilder.DefineDynamicModule(myAsmName.Name, myAsmName.Name & ".dll")
      
      Dim myTypeBuilder As TypeBuilder = myModBuilder.DefineType("CustomerData", TypeAttributes.Public)
      
      ' Define a private field to hold the property value.
      Dim customerNameBldr As FieldBuilder = myTypeBuilder.DefineField("customerName", _
                                             GetType(String), FieldAttributes.Private)
      
      ' The last argument of DefineProperty is Nothing, because the
      ' property has no parameters. (If you don't specify Nothing, you must
      ' specify an array of Type objects. For a parameterless property,
      ' use an array with no elements: New Type() {})
      Dim custNamePropBldr As PropertyBuilder = _
          myTypeBuilder.DefineProperty("CustomerName", _
                                       PropertyAttributes.HasDefault, _
                                       GetType(String), _
                                       Nothing)
      
      ' The property set and property get methods require a special
      ' set of attributes.
      Dim getSetAttr As MethodAttributes = _
          MethodAttributes.Public Or MethodAttributes.SpecialName _
              Or MethodAttributes.HideBySig

      ' Define the "get" accessor method for CustomerName.
      Dim custNameGetPropMthdBldr As MethodBuilder = _
          myTypeBuilder.DefineMethod("GetCustomerName", _
                                     getSetAttr, _
                                     GetType(String), _
                                     Type.EmptyTypes)
      
      Dim custNameGetIL As ILGenerator = custNameGetPropMthdBldr.GetILGenerator()
      
      custNameGetIL.Emit(OpCodes.Ldarg_0)
      custNameGetIL.Emit(OpCodes.Ldfld, customerNameBldr)
      custNameGetIL.Emit(OpCodes.Ret)
      
      ' Define the "set" accessor method for CustomerName.
      Dim custNameSetPropMthdBldr As MethodBuilder = _
          myTypeBuilder.DefineMethod("get_CustomerName", _
                                     getSetAttr, _
                                     Nothing, _
                                     New Type() {GetType(String)})
      
      Dim custNameSetIL As ILGenerator = custNameSetPropMthdBldr.GetILGenerator()
      
      custNameSetIL.Emit(OpCodes.Ldarg_0)
      custNameSetIL.Emit(OpCodes.Ldarg_1)
      custNameSetIL.Emit(OpCodes.Stfld, customerNameBldr)
      custNameSetIL.Emit(OpCodes.Ret)
      
      ' Last, we must map the two methods created above to our PropertyBuilder to 
      ' their corresponding behaviors, "get" and "set" respectively. 
      custNamePropBldr.SetGetMethod(custNameGetPropMthdBldr)
      custNamePropBldr.SetSetMethod(custNameSetPropMthdBldr)
            
      Dim retval As Type = myTypeBuilder.CreateType()

      ' Save the assembly so it can be examined with Ildasm.exe,
      ' or referenced by a test program.
      myAsmBuilder.Save(myAsmName.Name & ".dll")
      return retval
   End Function 'BuildDynamicTypeWithProperties
    
   
   Public Shared Sub Main()
      Dim custDataType As Type = BuildDynamicTypeWithProperties()
      
      Dim custDataPropInfo As PropertyInfo() = custDataType.GetProperties()
      Dim pInfo As PropertyInfo
      For Each pInfo In  custDataPropInfo
         Console.WriteLine("Property '{0}' created!", pInfo.ToString())
      Next pInfo
      
      Console.WriteLine("---")
      ' Note that when invoking a property, you need to use the proper BindingFlags -
      ' BindingFlags.SetProperty when you invoke the "set" behavior, and 
      ' BindingFlags.GetProperty when you invoke the "get" behavior. Also note that
      ' we invoke them based on the name we gave the property, as expected, and not
      ' the name of the methods we bound to the specific property behaviors.
      Dim custData As Object = Activator.CreateInstance(custDataType)
      custDataType.InvokeMember("CustomerName", BindingFlags.SetProperty, Nothing, _
                                custData, New Object() {"Joe User"})
      
      Console.WriteLine("The customerName field of instance custData has been set to '{0}'.", _
                        custDataType.InvokeMember("CustomerName", BindingFlags.GetProperty, _
                        Nothing, custData, New Object() {}))
   End Sub
End Class


' --- O U T P U T ---
' The output should be as follows:
' -------------------
' Property 'System.String CustomerName' created!
' ---
' The customerName field of instance custData has been set to 'Joe User'.
' -------------------

适用于

DefineProperty(String, PropertyAttributes, CallingConventions, Type, Type[])

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

向类型添加新属性，其中包含给定的名称、属性、调用约定和属性签名。

public:
 System::Reflection::Emit::PropertyBuilder ^ DefineProperty(System::String ^ name, System::Reflection::PropertyAttributes attributes, System::Reflection::CallingConventions callingConvention, Type ^ returnType, cli::array <Type ^> ^ parameterTypes);

public System.Reflection.Emit.PropertyBuilder DefineProperty(string name, System.Reflection.PropertyAttributes attributes, System.Reflection.CallingConventions callingConvention, Type? returnType, Type[]? parameterTypes);

public System.Reflection.Emit.PropertyBuilder DefineProperty(string name, System.Reflection.PropertyAttributes attributes, System.Reflection.CallingConventions callingConvention, Type returnType, Type[]? parameterTypes);

public System.Reflection.Emit.PropertyBuilder DefineProperty(string name, System.Reflection.PropertyAttributes attributes, System.Reflection.CallingConventions callingConvention, Type returnType, Type[] parameterTypes);

member this.DefineProperty : string * System.Reflection.PropertyAttributes * System.Reflection.CallingConventions * Type * Type[] -> System.Reflection.Emit.PropertyBuilder

Public Function DefineProperty (name As String, attributes As PropertyAttributes, callingConvention As CallingConventions, returnType As Type, parameterTypes As Type()) As PropertyBuilder

参数

name: String

属性的名称。 name 不能包含嵌入的 null。

attributes: PropertyAttributes

属性的属性。

callingConvention: CallingConventions

属性访问器的调用约定。

returnType: Type

属性的返回类型。

parameterTypes: Type[]

属性的参数的类型。

PropertyBuilder

定义的属性。

例外

ArgumentException

长度 name 为零。

ArgumentNullException

name 是 null。

-或-

数组的任何元素 parameterTypes 都是 null。

InvalidOperationException

该类型以前是使用 CreateType().

适用于

DefineProperty(String, PropertyAttributes, Type, Type[], Type[], Type[], Type[][], Type[][])

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

向类型中添加一个新属性，其中包含给定的名称、属性签名和自定义修饰符。

public:
 System::Reflection::Emit::PropertyBuilder ^ DefineProperty(System::String ^ name, System::Reflection::PropertyAttributes attributes, Type ^ returnType, cli::array <Type ^> ^ returnTypeRequiredCustomModifiers, cli::array <Type ^> ^ returnTypeOptionalCustomModifiers, cli::array <Type ^> ^ parameterTypes, cli::array <cli::array <Type ^> ^> ^ parameterTypeRequiredCustomModifiers, cli::array <cli::array <Type ^> ^> ^ parameterTypeOptionalCustomModifiers);

public System.Reflection.Emit.PropertyBuilder DefineProperty(string name, System.Reflection.PropertyAttributes attributes, Type? returnType, Type[]? returnTypeRequiredCustomModifiers, Type[]? returnTypeOptionalCustomModifiers, Type[]? parameterTypes, Type[][]? parameterTypeRequiredCustomModifiers, Type[][]? parameterTypeOptionalCustomModifiers);

public System.Reflection.Emit.PropertyBuilder DefineProperty(string name, System.Reflection.PropertyAttributes attributes, Type returnType, Type[]? returnTypeRequiredCustomModifiers, Type[]? returnTypeOptionalCustomModifiers, Type[]? parameterTypes, Type[][]? parameterTypeRequiredCustomModifiers, Type[][]? parameterTypeOptionalCustomModifiers);

public System.Reflection.Emit.PropertyBuilder DefineProperty(string name, System.Reflection.PropertyAttributes attributes, Type returnType, Type[] returnTypeRequiredCustomModifiers, Type[] returnTypeOptionalCustomModifiers, Type[] parameterTypes, Type[][] parameterTypeRequiredCustomModifiers, Type[][] parameterTypeOptionalCustomModifiers);

member this.DefineProperty : string * System.Reflection.PropertyAttributes * Type * Type[] * Type[] * Type[] * Type[][] * Type[][] -> System.Reflection.Emit.PropertyBuilder

Public Function DefineProperty (name As String, attributes As PropertyAttributes, returnType As Type, returnTypeRequiredCustomModifiers As Type(), returnTypeOptionalCustomModifiers As Type(), parameterTypes As Type(), parameterTypeRequiredCustomModifiers As Type()(), parameterTypeOptionalCustomModifiers As Type()()) As PropertyBuilder

参数

name: String

属性的名称。 name 不能包含嵌入的 null。

attributes: PropertyAttributes

属性的属性。

returnType: Type

属性的返回类型。

returnTypeRequiredCustomModifiers: Type[]

一个类型数组，表示属性的返回类型所需的自定义修饰符，例如 IsConst。如果返回类型没有必需的自定义修饰符，请指定 null。

returnTypeOptionalCustomModifiers: Type[]

一个类型数组，表示属性的返回类型的可选自定义修饰符，例如 IsConst。如果返回类型没有可选的自定义修饰符，请指定 null。

parameterTypes: Type[]

属性的参数的类型。

parameterTypeRequiredCustomModifiers: Type[][]

类型的数组数组。每种类型数组都表示相应参数所需的自定义修饰符，例如 IsConst。如果特定参数没有必需的自定义修饰符，请指定 null 而不是类型的数组。如果没有任何参数需要自定义修饰符，请指定 null 而不是数组数组。

parameterTypeOptionalCustomModifiers: Type[][]

类型的数组数组。每种类型数组都表示相应参数的可选自定义修饰符，例如 IsConst。如果特定参数没有可选的自定义修饰符，请指定 null 而不是类型的数组。如果没有任何参数具有可选的自定义修饰符，请指定 null 而不是数组数组。

PropertyBuilder

定义的属性。

例外

ArgumentException

长度 name 为零。

ArgumentNullException

name 是 null

-或-

数组的任何元素 parameterTypes 都是 null

InvalidOperationException

该类型以前是使用 CreateType().

注解

此重载是为托管编译器的设计器提供的。

注释

有关自定义修饰符的详细信息，请参阅 ECMA C# 和公共语言基础结构标准和标准 ECMA-335 - 公共语言基础结构（CLI）。

适用于

DefineProperty(String, PropertyAttributes, CallingConventions, Type, Type[], Type[], Type[], Type[][], Type[][])

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

Source:: TypeBuilder.cs

向类型添加新属性，其中包含给定的名称、调用约定、属性签名和自定义修饰符。

public:
 System::Reflection::Emit::PropertyBuilder ^ DefineProperty(System::String ^ name, System::Reflection::PropertyAttributes attributes, System::Reflection::CallingConventions callingConvention, Type ^ returnType, cli::array <Type ^> ^ returnTypeRequiredCustomModifiers, cli::array <Type ^> ^ returnTypeOptionalCustomModifiers, cli::array <Type ^> ^ parameterTypes, cli::array <cli::array <Type ^> ^> ^ parameterTypeRequiredCustomModifiers, cli::array <cli::array <Type ^> ^> ^ parameterTypeOptionalCustomModifiers);

public System.Reflection.Emit.PropertyBuilder DefineProperty(string name, System.Reflection.PropertyAttributes attributes, System.Reflection.CallingConventions callingConvention, Type? returnType, Type[]? returnTypeRequiredCustomModifiers, Type[]? returnTypeOptionalCustomModifiers, Type[]? parameterTypes, Type[][]? parameterTypeRequiredCustomModifiers, Type[][]? parameterTypeOptionalCustomModifiers);

public System.Reflection.Emit.PropertyBuilder DefineProperty(string name, System.Reflection.PropertyAttributes attributes, System.Reflection.CallingConventions callingConvention, Type returnType, Type[]? returnTypeRequiredCustomModifiers, Type[]? returnTypeOptionalCustomModifiers, Type[]? parameterTypes, Type[][]? parameterTypeRequiredCustomModifiers, Type[][]? parameterTypeOptionalCustomModifiers);

public System.Reflection.Emit.PropertyBuilder DefineProperty(string name, System.Reflection.PropertyAttributes attributes, System.Reflection.CallingConventions callingConvention, Type returnType, Type[] returnTypeRequiredCustomModifiers, Type[] returnTypeOptionalCustomModifiers, Type[] parameterTypes, Type[][] parameterTypeRequiredCustomModifiers, Type[][] parameterTypeOptionalCustomModifiers);

member this.DefineProperty : string * System.Reflection.PropertyAttributes * System.Reflection.CallingConventions * Type * Type[] * Type[] * Type[] * Type[][] * Type[][] -> System.Reflection.Emit.PropertyBuilder

Public Function DefineProperty (name As String, attributes As PropertyAttributes, callingConvention As CallingConventions, returnType As Type, returnTypeRequiredCustomModifiers As Type(), returnTypeOptionalCustomModifiers As Type(), parameterTypes As Type(), parameterTypeRequiredCustomModifiers As Type()(), parameterTypeOptionalCustomModifiers As Type()()) As PropertyBuilder