FieldInfo 类

定义

public ref class FieldInfo abstract : System::Reflection::MemberInfo

public ref class FieldInfo abstract : System::Reflection::MemberInfo, System::Runtime::InteropServices::_FieldInfo

public abstract class FieldInfo : System.Reflection.MemberInfo

[System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)]
[System.Serializable]
public abstract class FieldInfo : System.Reflection.MemberInfo, System.Runtime.InteropServices._FieldInfo

[System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)]
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public abstract class FieldInfo : System.Reflection.MemberInfo, System.Runtime.InteropServices._FieldInfo

type FieldInfo = class
    inherit MemberInfo

[<System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)>]
[<System.Serializable>]
type FieldInfo = class
    inherit MemberInfo
    interface _FieldInfo

[<System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.None)>]
[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type FieldInfo = class
    inherit MemberInfo
    interface _FieldInfo

Public MustInherit Class FieldInfo
Inherits MemberInfo

Public MustInherit Class FieldInfo
Inherits MemberInfo
Implements _FieldInfo

继承

Object

MemberInfo

FieldInfo

派生

Microsoft.JScript.COMFieldInfo

Microsoft.JScript.JSField

Microsoft.JScript.JSFieldInfo

System.Reflection.Emit.FieldBuilder

属性

ClassInterfaceAttribute SerializableAttribute ComVisibleAttribute

实现

_FieldInfo

示例

下面的示例使用 Type.GetFields 方法从 FieldInfo 类获取字段相关信息，然后显示字段属性。

using namespace System;
using namespace System::Reflection;
public ref class FieldInfoClass
{
public:
   int myField1;

protected:
   String^ myField2;
};

int main()
{
   array<FieldInfo^>^myFieldInfo;
   Type^ myType = FieldInfoClass::typeid;

   // Get the type and fields of FieldInfoClass.
   myFieldInfo = myType->GetFields( static_cast<BindingFlags>(BindingFlags::NonPublic | BindingFlags::Instance | BindingFlags::Public) );
   Console::WriteLine( "\nThe fields of FieldInfoClass are \n" );

   // Display the field information of FieldInfoClass.
   for ( int i = 0; i < myFieldInfo->Length; i++ )
   {
      Console::WriteLine( "\nName            : {0}", myFieldInfo[ i ]->Name );
      Console::WriteLine( "Declaring Type  : {0}", myFieldInfo[ i ]->DeclaringType );
      Console::WriteLine( "IsPublic        : {0}", myFieldInfo[ i ]->IsPublic );
      Console::WriteLine( "MemberType      : {0}", myFieldInfo[ i ]->MemberType );
      Console::WriteLine( "FieldType       : {0}", myFieldInfo[ i ]->FieldType );
      Console::WriteLine( "IsFamily        : {0}", myFieldInfo[ i ]->IsFamily );
   }
}

using System;
using System.Reflection;

public class FieldInfoClass
{
    public int myField1 = 0;
    protected string myField2 = null;
    public static void Main()
    {
        FieldInfo[] myFieldInfo;
        Type myType = typeof(FieldInfoClass);
        // Get the type and fields of FieldInfoClass.
        myFieldInfo = myType.GetFields(BindingFlags.NonPublic | BindingFlags.Instance
            | BindingFlags.Public);
        Console.WriteLine("\nThe fields of " +
            "FieldInfoClass are \n");
        // Display the field information of FieldInfoClass.
        for(int i = 0; i < myFieldInfo.Length; i++)
        {
            Console.WriteLine("\nName            : {0}", myFieldInfo[i].Name);
            Console.WriteLine("Declaring Type  : {0}", myFieldInfo[i].DeclaringType);
            Console.WriteLine("IsPublic        : {0}", myFieldInfo[i].IsPublic);
            Console.WriteLine("MemberType      : {0}", myFieldInfo[i].MemberType);
            Console.WriteLine("FieldType       : {0}", myFieldInfo[i].FieldType);
            Console.WriteLine("IsFamily        : {0}", myFieldInfo[i].IsFamily);
        }
    }
}

Imports System.Reflection

Public Class FieldInfoClass
    Public myField1 As Integer = 0
    Protected myField2 As String = Nothing

    Public Shared Sub Main()
        Dim myFieldInfo() As FieldInfo
        Dim myType As Type = GetType(FieldInfoClass)
        ' Get the type and fields of FieldInfoClass.
        myFieldInfo = myType.GetFields(BindingFlags.NonPublic Or _
                      BindingFlags.Instance Or BindingFlags.Public)
        Console.WriteLine(ControlChars.NewLine & "The fields of " & _
                      "FieldInfoClass class are " & ControlChars.NewLine)
        ' Display the field information of FieldInfoClass.
        Dim i As Integer
        For i = 0 To myFieldInfo.Length - 1
            Console.WriteLine(ControlChars.NewLine + "Name            : {0}", myFieldInfo(i).Name)
            Console.WriteLine("Declaring Type  : {0}", myFieldInfo(i).DeclaringType)
            Console.WriteLine("IsPublic        : {0}", myFieldInfo(i).IsPublic)
            Console.WriteLine("MemberType      : {0}", myFieldInfo(i).MemberType)
            Console.WriteLine("FieldType       : {0}", myFieldInfo(i).FieldType)
            Console.WriteLine("IsFamily        : {0}", myFieldInfo(i).IsFamily)
        Next i
    End Sub
End Class

注解

字段信息是从元数据获取的。 类 FieldInfo 没有公共构造函数。 FieldInfo 对象是通过调用 GetFields 对象的 或 GetField 方法获取的 Type 。

字段是在 类中定义的变量。 FieldInfo 提供对类中字段元数据的访问，并为字段提供动态集和获取功能。 在对象上调用 invoke 或 get 之前，类不会加载到内存中。

实施者说明

当从 FieldInfo 继承时，必须重写下面的成员：GetValue(Object) 和 SetValue(Object, Object, BindingFlags, Binder, CultureInfo)。

构造函数

属性

方法

运算符

显式接口实现

扩展方法

适用于

线程安全性

此类型是线程安全的。

另请参阅

• Type