MemberInfo 类
获取有关成员属性的信息并提供对成员元数据的访问。
**命名空间:**System.Reflection
**程序集:**mscorlib（在 mscorlib.dll 中）
语法
声明
<SerializableAttribute> _
<ClassInterfaceAttribute(ClassInterfaceType.None)> _
<ComVisibleAttribute(True)> _
Public MustInherit Class MemberInfo
Implements ICustomAttributeProvider, _MemberInfo
用法
Dim instance As MemberInfo
[SerializableAttribute]
[ClassInterfaceAttribute(ClassInterfaceType.None)]
[ComVisibleAttribute(true)]
public abstract class MemberInfo : ICustomAttributeProvider, _MemberInfo
[SerializableAttribute]
[ClassInterfaceAttribute(ClassInterfaceType::None)]
[ComVisibleAttribute(true)]
public ref class MemberInfo abstract : ICustomAttributeProvider, _MemberInfo
/** @attribute SerializableAttribute() */
/** @attribute ClassInterfaceAttribute(ClassInterfaceType.None) */
/** @attribute ComVisibleAttribute(true) */
public abstract class MemberInfo implements ICustomAttributeProvider, _MemberInfo
SerializableAttribute
ClassInterfaceAttribute(ClassInterfaceType.None)
ComVisibleAttribute(true)
public abstract class MemberInfo implements ICustomAttributeProvider, _MemberInfo
备注
MemberInfo 类是用于获取有关类的所有成员（构造函数、事件、字段、方法和属性）的信息的类的抽象基类。
此类引入所有成员都提供的基本功能。
给继承者的说明 当从 MemberInfo 继承时，必须重写下列成员：GetCustomAttributes 和 IsDefined。
示例
本示例演示如何使用各种反射类来分析包含在程序集中的元数据。
Imports System
Imports System.Reflection
Module Module1
Sub Main()
' This variable holds the amount of indenting that
' should be used when displaying each line of information.
Dim indent As Int32 = 0
' Display information about the EXE assembly.
Dim a As [Assembly] = System.Reflection.Assembly.GetExecutingAssembly()
Display(indent, "Assembly identity={0}", a.FullName)
Display(indent + 1, "Codebase={0}", a.CodeBase)
' Display the set of assemblies our assemblies references.
Dim an As AssemblyName
Display(indent, "Referenced assemblies:")
For Each an In a.GetReferencedAssemblies()
Display(indent + 1, "Name={0}, Version={1}, Culture={2}, PublicKey token={3}", _
an.Name, an.Version, an.CultureInfo.Name, BitConverter.ToString(an.GetPublicKeyToken))
Next
Display(indent, "")
' Display information about each assembly loading into this AppDomain.
For Each a In AppDomain.CurrentDomain.GetAssemblies()
Display(indent, "Assembly: {0}", a)
' Display information about each module of this assembly.
Dim m As [Module]
For Each m In a.GetModules(True)
Display(indent + 1, "Module: {0}", m.Name)
Next
' Display information about each type exported from this assembly.
Dim t As Type
indent += 1
For Each t In a.GetExportedTypes()
Display(0, "")
Display(indent, "Type: {0}", t)
' For each type, show its members & their custom attributes.
Dim mi As MemberInfo
indent += 1
For Each mi In t.GetMembers()
Display(indent, "Member: {0}", mi.Name)
DisplayAttributes(indent, mi)
' If the member is a method, display information about its parameters.
Dim pi As ParameterInfo
If mi.MemberType = MemberTypes.Method Then
For Each pi In CType(mi, MethodInfo).GetParameters()
Display(indent + 1, "Parameter: Type={0}, Name={1}", pi.ParameterType, pi.Name)
Next
End If
' If the member is a property, display information about the property's accessor methods.
If mi.MemberType = MemberTypes.Property Then
Dim am As MethodInfo
For Each am In CType(mi, PropertyInfo).GetAccessors()
Display(indent + 1, "Accessor method: {0}", am)
Next
End If
Next
indent -= 1
Next
indent -= 1
Next
End Sub
' Displays the custom attributes applied to the specified member.
Sub DisplayAttributes(ByVal indent As Int32, ByVal mi As MemberInfo)
' Get the set of custom attributes; if none exist, just return.
Dim attrs() As Object = mi.GetCustomAttributes(False)
If attrs.Length = 0 Then Return
' Display the custom attributes applied to this member.
Display(indent + 1, "Attributes:")
Dim o As Object
For Each o In attrs
Display(indent + 2, "{0}", o.ToString())
Next
End Sub
' Display a formatted string indented by the specified amount.
Sub Display(ByVal indent As Int32, ByVal format As String, ByVal ParamArray params() As Object)
Console.Write(New String(" "c, indent * 2))
Console.WriteLine(format, params)
End Sub
End Module
'The output shown below is abbreviated.
'
'Assembly identity=Reflection, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null
' Codebase=file:///C:/Reflection.exe
'Referenced assemblies:
' Name=mscorlib, Version=1.0.5000.0, Culture=, PublicKey token=B7-7A-5C-56-19-34-E0-89
' Name=Microsoft.VisualBasic, Version=7.0.5000.0, Culture=, PublicKey token=B0-3F-5F-7F-11-D5-0A-3A
'
'Assembly: mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
' Module: mscorlib.dll
' Module: prc.nlp
' Module: prcp.nlp
' Module: ksc.nlp
' Module: ctype.nlp
' Module: xjis.nlp
' Module: bopomofo.nlp
' Module: culture.nlp
' Module: region.nlp
' Module: sortkey.nlp
' Module: charinfo.nlp
' Module: big5.nlp
' Module: sorttbls.nlp
' Module: l_intl.nlp
' Module: l_except.nlp
'
' Type: System.Object
' Member: GetHashCode
' Member: Equals
' Parameter: Type=System.Object, Name=obj
' Member: ToString
' Member: Equals
' Parameter: Type=System.Object, Name=objA
' Parameter: Type=System.Object, Name=objB
' Member: ReferenceEquals
' Parameter: Type=System.Object, Name=objA
' Parameter: Type=System.Object, Name=objB
' Member: GetType
' Member: .ctor
'
' Type: System.ICloneable
' Member: Clone
'
' Type: System.Collections.IEnumerable
' Member: GetEnumerator
' Attributes:
' System.Runtime.InteropServices.DispIdAttribute
'
' Type: System.Collections.ICollection
' Member: get_IsSynchronized
' Member: get_SyncRoot
' Member: get_Count
' Member: CopyTo
' Parameter: Type=System.Array, Name=array
' Parameter: Type=System.Int32, Name=index
' Member: Count
' Accessor method: Int32 get_Count()
' Member: SyncRoot
' Accessor method: System.Object get_SyncRoot()
' Member: IsSynchronized
' Accessor method: Boolean get_IsSynchronized()
'
继承层次结构
System.Object
System.Reflection.MemberInfo
System.Reflection.EventInfo
System.Reflection.FieldInfo
System.Reflection.MethodBase
System.Reflection.PropertyInfo
System.Type
线程安全
该类型对于多线程操作是安全的。
平台
Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、Windows Mobile for Smartphone、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。
版本信息
.NET Framework
受以下版本支持：2.0、1.1、1.0
.NET Compact Framework
受以下版本支持：2.0、1.0