MemberInfo-Klasse
Ruft Informationen zu den Attributen eines Members ab und bietet Zugriff auf die Metadaten des Members.
Namespace: System.Reflection
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
<SerializableAttribute> _
<ClassInterfaceAttribute(ClassInterfaceType.None)> _
<ComVisibleAttribute(True)> _
Public MustInherit Class MemberInfo
Implements ICustomAttributeProvider, _MemberInfo
'Usage
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
Hinweise
Die MemberInfo-Klasse ist die abstrakte Basisklasse für Klassen zum Abrufen der Informationen zu allen Membern einer Klasse (z. B. Konstruktoren, Ereignissen, Feldern, Methoden und Eigenschaften).
Diese Klasse liefert die von allen Membern bereitgestellten Basisfunktionen.
Hinweise für Erben Wenn Sie die MemberInfo-Klasse vererben, müssen Sie die folgenden Member überschreiben: GetCustomAttributes und IsDefined.
Beispiel
In diesem Beispiel wird Verwendung verschiedener Reflektionsklassen zur Analyse der in einer Assembly enthaltenen Metadaten dargestellt.
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()
'
Vererbungshierarchie
System.Object
System.Reflection.MemberInfo
System.Reflection.EventInfo
System.Reflection.FieldInfo
System.Reflection.MethodBase
System.Reflection.PropertyInfo
System.Type
Threadsicherheit
Dieser Typ ist sicher bei Multithreadoperationen.
Plattformen
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
.NET Compact Framework
Unterstützt in: 2.0, 1.0