FieldInfo.IsPublic 属性
定义
获取一个值,通过该值指示此字段是否为公共字段。Gets a value indicating whether the field is public.
public:
property bool IsPublic { bool get(); };
public bool IsPublic { get; }
member this.IsPublic : bool
Public ReadOnly Property IsPublic As Boolean
属性值
如果此字段为公共字段,则为 true;否则为 false。true if this field is public; otherwise, false.
实现
示例
下面的示例返回一个值,该值指示类的字段是公共的还是私有的。The following example returns a value indicating whether or not the field of the class is public or private.
using namespace System;
using namespace System::Reflection;
// Make two fields.
// private
public ref class Myfielda
{
private:
String^ SomeField;
public:
Myfielda()
: SomeField( "private field" )
{}
property String^ Field
{
String^ get()
{
return SomeField;
}
}
};
// public
public ref class Myfieldb
{
public:
String^ SomeField;
Myfieldb()
: SomeField( "public field" )
{}
property String^ Field
{
String^ get()
{
return SomeField;
}
}
};
int main()
{
Console::WriteLine( "\nReflection.FieldInfo" );
Myfielda^ myfielda = gcnew Myfielda;
Myfieldb^ myfieldb = gcnew Myfieldb;
// Get the Type and FieldInfo.
Type^ MyTypea = Type::GetType( "Myfielda" );
FieldInfo^ Myfieldinfoa = MyTypea->GetField( "SomeField", static_cast<BindingFlags>(BindingFlags::NonPublic | BindingFlags::Instance) );
Type^ MyTypeb = Type::GetType( "Myfieldb" );
FieldInfo^ Myfieldinfob = MyTypeb->GetField( "SomeField" );
// Get and display the IsPublic and IsPrivate property values.
Console::Write( "\n{0}.", MyTypea->FullName );
Console::Write( "{0} - ", Myfieldinfoa->Name );
Console::Write( "{0}", myfielda->Field );
Console::Write( "\n IsPublic = {0}", Myfieldinfoa->IsPublic );
Console::Write( "\n IsPrivate = {0}", Myfieldinfoa->IsPrivate );
Console::Write( "\n{0}.", MyTypeb->FullName );
Console::Write( "{0} - ", Myfieldinfob->Name );
Console::Write( "{0};", myfieldb->Field );
Console::Write( "\n IsPublic = {0}", Myfieldinfob->IsPublic );
Console::Write( "\n IsPrivate = {0}", Myfieldinfob->IsPrivate );
return 0;
}
using System;
using System.Reflection;
// Make two fields.
public
class Myfielda // private
{
private string SomeField = "private field";
public string Field
{
get{return SomeField;}
}
}
public
class Myfieldb // public
{
public string SomeField = "public field";
}
public
class Myfieldinfo
{
public static int Main()
{
Console.WriteLine("\nReflection.FieldInfo");
Myfielda Myfielda = new Myfielda();
Myfieldb Myfieldb = new Myfieldb();
// Get the Type and FieldInfo.
Type MyTypea = typeof(Myfielda);
FieldInfo Myfieldinfoa = MyTypea.GetField("SomeField",
BindingFlags.NonPublic|BindingFlags.Instance);
Type MyTypeb = typeof(Myfieldb);
FieldInfo Myfieldinfob = MyTypeb.GetField("SomeField");
// Get and display the IsPublic and IsPrivate property values.
Console.Write("\n{0}.", MyTypea.FullName);
Console.Write("{0} - ", Myfieldinfoa.Name);
Console.Write("{0}", Myfielda.Field);
Console.Write("\n IsPublic = {0}", Myfieldinfoa.IsPublic);
Console.Write("\n IsPrivate = {0}", Myfieldinfoa.IsPrivate);
Console.Write("\n{0}.", MyTypeb.FullName);
Console.Write("{0} - ", Myfieldinfob.Name);
Console.Write("{0};", Myfieldb.SomeField);
Console.Write("\n IsPublic = {0}", Myfieldinfob.IsPublic);
Console.Write("\n IsPrivate = {0}", Myfieldinfob.IsPrivate);
return 0;
}
}
Imports System.Reflection
' Make two fields.
Public Class Myfielda
' Make a private field.
Private SomeField As String = "private field"
Public ReadOnly Property Field() As String
Get
Return SomeField
End Get
End Property
End Class
Public Class Myfieldb
' Make a public field.
Public SomeField As String = "public field"
End Class
Public Class Myfieldinfo
Public Shared Function Main() As Integer
Console.WriteLine("Reflection.FieldInfo")
Console.WriteLine()
Dim Myfielda As New Myfielda()
Dim Myfieldb As New Myfieldb()
' Get the Type and FieldInfo.
Dim MyTypea As Type = GetType(Myfielda)
Dim Myfieldinfoa As FieldInfo = MyTypea.GetField("SomeField", _
BindingFlags.NonPublic Or BindingFlags.Instance)
Dim MyTypeb As Type = GetType(Myfieldb)
Dim Myfieldinfob As FieldInfo = MyTypeb.GetField("SomeField")
' Get and display the IsPublic and IsPrivate property values.
Console.WriteLine("{0}.{1} - {2}", MyTypea.FullName, Myfieldinfoa.Name, _
Myfielda.Field)
Console.WriteLine(" IsPublic = {0}", Myfieldinfoa.IsPublic)
Console.WriteLine(" IsPrivate = {0}", Myfieldinfoa.IsPrivate)
Console.WriteLine()
Console.WriteLine("{0}.{1} - {2}", MyTypeb.FullName, Myfieldinfob.Name, _
Myfieldb.SomeField)
Console.WriteLine(" IsPublic = {0}", Myfieldinfob.IsPublic)
Console.WriteLine(" IsPrivate = {0}", Myfieldinfob.IsPrivate)
Return 0
End Function 'Main
End Class
注解
公共字段在其对应类可见的任何位置都是可访问的。Public fields are accessible everywhere their corresponding classes are visible.
IsPublic设置属性时,设置属性 FieldAttributes.Public 。The IsPublic property is set when the FieldAttributes.Public attribute is set.
若要获取 IsPublic 属性,请首先获取类 Type 。To get the IsPublic property, first get the class Type. 从中 Type 获取 FieldInfo 。From the Type, get the FieldInfo. 从中 FieldInfo 获取 IsPublic 属性。From the FieldInfo, get the IsPublic property. 如果此字段不是公共的,则它是受保护的,无法轻松访问。If the field is other than public, it is protected and cannot be readily accessed. 若要访问非公共字段,请将设置 BindingFlags 为 NonPublic ,指定 BindingFlags.Instance 或 BindingFlags.Static ,并将此用于 GetField 方法。To access a nonpublic field, set the BindingFlags to NonPublic, specify either BindingFlags.Instance or BindingFlags.Static, and use this for the GetField method.