Type.IsAutoLayout Type.IsAutoLayout Type.IsAutoLayout Type.IsAutoLayout Property

定義

取得表示目前類型的欄位是否已由 Common Language Runtime 自動配置版面的值。Gets a value indicating whether the fields of the current type are laid out automatically by the common language runtime.

public:
 property bool IsAutoLayout { bool get(); };
public bool IsAutoLayout { get; }
member this.IsAutoLayout : bool
Public ReadOnly Property IsAutoLayout As Boolean

屬性值

如果目前類型的 true 屬性包含 Attributes 則為 AutoLayout,否則為 falsetrue if the Attributes property of the current type includes AutoLayout; otherwise, false.

實作

範例

下列範例會建立類型的執行個體,並顯示IsAutoLayout屬性。The following example creates an instance of the type and displays the IsAutoLayout property.

#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); 
    }
}
Imports System
Imports System.Runtime.InteropServices
Imports Microsoft.VisualBasic

' 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 

備註

為了方便起見提供這個屬性。This property is provided as a convenience. 或者,您可以使用TypeAttributes.LayoutMask列舉值,以選取類型版面配置屬性,然後測試是否TypeAttributes.AutoLayout設定。Alternatively, you can use the TypeAttributes.LayoutMask enumeration value to select the type layout attributes, and then test whether TypeAttributes.AutoLayout is set. TypeAttributes.AutoLayoutTypeAttributes.ExplicitLayout,和TypeAttributes.SequentialLayout列舉值,表示類型的欄位配置記憶體中的方式。The TypeAttributes.AutoLayout,TypeAttributes.ExplicitLayout, and TypeAttributes.SequentialLayout enumeration values indicate the way the fields of the type are laid out in memory.

動態類型,您可以指定TypeAttributes.AutoLayout當您建立的類型。For dynamic types, you can specify TypeAttributes.AutoLayout when you create the type. 在程式碼中,套用StructLayoutAttribute屬性搭配LayoutKind.Auto列舉值的型別,以便判斷適當的方式來配置類別的執行階段。In code, apply the StructLayoutAttribute attribute with the LayoutKind.Auto enumeration value to the type, to let the runtime determine the appropriate way to lay out the class.

注意

您無法使用GetCustomAttributes方法,以判斷是否StructLayoutAttribute已套用至型別。You cannot use the GetCustomAttributes method to determine whether the StructLayoutAttribute has been applied to a type.

如果目前Type代表建構泛型型別,這個屬性會套用至泛型型別定義從中建構的類型。If the current Type represents a constructed generic type, this property applies to the generic type definition from which the type was constructed. 例如,如果目前Type代表MyGenericType<int>(MyGenericType(Of Integer) Visual Basic 中),這個屬性的值由 MyGenericType<T>.For example, if the current Type represents MyGenericType<int> (MyGenericType(Of Integer) in Visual Basic), the value of this property is determined by MyGenericType<T>.

如果目前Type表示的類型參數的泛型類型或泛型方法定義中這個屬性一律傳回falseIf the current Type represents a type parameter in the definition of a generic type or generic method, this property always returns false.

適用於

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