Type.IsAutoLayout 属性

public:
 property bool IsAutoLayout { bool get(); };

public bool IsAutoLayout { get; }

member this.IsAutoLayout : bool

Public ReadOnly Property IsAutoLayout As Boolean

属性值

如果当前类型的 true 属性包括 Attributes，则为 AutoLayout；否则为 false。

实现

示例

以下示例创建 类型的实例并显示 属性 IsAutoLayout 。

#using <System.dll>

using namespace System;
using namespace System::Reflection;
using namespace System::ComponentModel;
using namespace System::Runtime::InteropServices;

// The MyDemoAttribute class is selected as AutoLayout.

[StructLayoutAttribute(LayoutKind::Auto)]
public ref class MyDemoAttribute{};

void MyAutoLayoutMethod( String^ typeName )
{
   try
   {
      
      // Create an instance of the Type class using the GetType method.
      Type^ myType = Type::GetType( typeName );
      
      // Get and display the IsAutoLayout property of the
      // MyDemoAttribute instance.
      Console::WriteLine( "\nThe AutoLayout property for the MyDemoAttribute is {0}.", myType->IsAutoLayout );
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "\nAn exception occurred: {0}.", e->Message );
   }

}

int main()
{
   MyAutoLayoutMethod( "MyDemoAttribute" );
}

using System;
using System.Runtime.InteropServices;

// The Demo class is attributed as AutoLayout.
[StructLayoutAttribute(LayoutKind.Auto)]
public class Demo
{
}

public class Example
{
    public static void Main()
    {
        // Create an instance of the Type class using the GetType method.
        Type  myType=typeof(Demo);
        // Get and display the IsAutoLayout property of the
        // Demoinstance.
        Console.WriteLine("\nThe AutoLayout property for the Demo class is {0}.",
            myType.IsAutoLayout);
    }
}

open System.Runtime.InteropServices

// The Demo class is attributed as AutoLayout.
[<StructLayoutAttribute(LayoutKind.Auto)>]
type Demo = class end

// Create an instance of the Type class using the GetType method.
let myType = typeof<Demo>
// Get and display the IsAutoLayout property of the
// Demoinstance.
printfn $"\nThe AutoLayout property for the Demo class is {myType.IsAutoLayout}."

Imports System.Runtime.InteropServices

' The Demo class is has the AutoLayout attribute.
<StructLayoutAttribute(LayoutKind.Auto)> _
Public Class Demo
End Class 

Public Class Example
    Public Shared Sub Main()
        ' Get the Type object for the Demo class.
        Dim myType As Type = GetType(Demo)
        ' Get and display the IsAutoLayout property of the 
        ' Demo class.
        Console.WriteLine("The AutoLayout property for the Demo class is '{0}'.", _
            myType.IsAutoLayout.ToString())
    End Sub 
End Class

注解

为了方便起见，提供此属性。 或者，可以使用 TypeAttributes.LayoutMask 枚举值来选择类型布局属性，然后测试是否 TypeAttributes.AutoLayout 设置了 。 TypeAttributes.AutoLayout、TypeAttributes.ExplicitLayout 和 TypeAttributes.SequentialLayout 枚举值指示类型字段在内存中的布局方式。

对于动态类型，可以在创建类型时指定 TypeAttributes.AutoLayout 。 在代码中，将 StructLayoutAttribute 具有 LayoutKind.Auto 枚举值的特性应用于类型，以便运行时确定布局类的适当方式。

如果当前 Type 表示构造的泛型类型，则此属性适用于从中构造该类型的泛型类型定义。 例如，如果当前 Type 表示 MyGenericType<int> Visual Basic) 中的 (MyGenericType(Of Integer) ，则此属性的值由 MyGenericType<T>.

如果当前 Type 表示泛型类型或泛型方法的定义中的类型参数，则此属性始终返回 false。

另请参阅

• TypeAttributes
• IsLayoutSequential
• IsExplicitLayout
• 元数据和自描述组件