Type.StructLayoutAttribute Properti

Definisi

Ruang nama:

System

Rakitan:

netstandard.dll, System.Runtime.dll

Sumber:

Type.cs

StructLayoutAttribute Mendapatkan yang menjelaskan tata letak jenis saat ini.

public:
 virtual property System::Runtime::InteropServices::StructLayoutAttribute ^ StructLayoutAttribute { System::Runtime::InteropServices::StructLayoutAttribute ^ get(); };

public virtual System.Runtime.InteropServices.StructLayoutAttribute? StructLayoutAttribute { get; }

member this.StructLayoutAttribute : System.Runtime.InteropServices.StructLayoutAttribute

Public Overridable ReadOnly Property StructLayoutAttribute As StructLayoutAttribute

Nilai Properti

StructLayoutAttribute

StructLayoutAttribute Mendapatkan yang menjelaskan fitur tata letak kotor dari jenis saat ini.

Pengecualian

NotSupportedException

Metode yang dipanggil tidak didukung di kelas dasar.

Contoh

Contoh kode berikut pertama-tama mendefinisikan kelas, struktur, dan struktur dengan atribut tata letak khusus (struktur disarangkan dalam kelas). Contoh kemudian menggunakan StructLayoutAttribute properti untuk mendapatkan StructLayoutAttribute untuk setiap jenis, dan menampilkan properti atribut.

using System;
using System.Runtime.InteropServices;

public class Example
{
    public static void Main()
    {
        DisplayLayoutAttribute(typeof(Example).StructLayoutAttribute);
        DisplayLayoutAttribute(typeof(Test1).StructLayoutAttribute);
        DisplayLayoutAttribute(typeof(Test2).StructLayoutAttribute);
    }

    private static void DisplayLayoutAttribute(StructLayoutAttribute sla)
    {
        Console.WriteLine("\r\nCharSet: "+sla.CharSet.ToString()+"\r\n   Pack: "+sla.Pack.ToString()+"\r\n   Size: "+sla.Size.ToString()+"\r\n  Value: "+sla.Value.ToString());
    }
    public struct Test1
    {
        public byte B1;
        public short S;
        public byte B2;
    }
    [StructLayout(LayoutKind.Explicit, Pack=1)] public struct Test2
    {
        [FieldOffset(0)] public byte B1;
        [FieldOffset(1)] public short S;
        [FieldOffset(3)] public byte B2;
    }
}

open System.Runtime.InteropServices

type Example = class end

[<Struct>]
type Test1 = 
    val B1 : byte
    val S : int16
    val B2 : byte

[<Struct; StructLayout(LayoutKind.Explicit, Pack=1)>] 
type Test2 =
    [<FieldOffset 0>] val B1 : byte
    [<FieldOffset 1>] val S : int16
    [<FieldOffset 3>] val B2 : byte

let displayLayoutAttribute (sla: StructLayoutAttribute) =
    printfn $"\nCharSet: {sla}\n   Pack: {sla.Pack}\n   Size: {sla.Size}\n  Value: {sla.Value}"
displayLayoutAttribute typeof<Example>.StructLayoutAttribute
displayLayoutAttribute typeof<Test1>.StructLayoutAttribute
displayLayoutAttribute typeof<Test2>.StructLayoutAttribute

Imports System.Runtime.InteropServices

Public Class Example
    Public Shared Sub Main()
        DisplayLayoutAttribute(GetType(Example).StructLayoutAttribute)
        DisplayLayoutAttribute(GetType(Test1).StructLayoutAttribute)
        DisplayLayoutAttribute(GetType(Test2).StructLayoutAttribute)
    End Sub

    Private Shared Sub DisplayLayoutAttribute( _
        ByVal sla As StructLayoutAttribute)
        Console.WriteLine(vbCrLf & "CharSet: " & sla.CharSet.ToString() _
            & vbCrLf & "   Pack: " & sla.Pack.ToString() _
            & vbCrLf & "   Size: " & sla.Size.ToString() _
            & vbCrLf & "  Value: " & sla.Value.ToString())
    End Sub

    Public Structure Test1
        Public B1 As Byte
        Public S As Short
        Public B2 As Byte
    End Structure

    <StructLayout(LayoutKind.Explicit, Pack:=1)> _
    Public Structure Test2
        <FieldOffset(0)> Public B1 As Byte
        <FieldOffset(1)> Public S As Short
        <FieldOffset(3)> Public B2 As Byte
    End Structure
End Class

Keterangan

StructLayoutAttribute tidak dikembalikan oleh GetCustomAttributes metode . Sebagai gantinya, gunakan properti ini untuk mendapatkannya.

Lihat juga

• StructLayoutAttribute