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TemplateInstanceAttribute.IsDefaultAttribute Metode

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Definisi

Ruang nama:
System.Web.UI
Rakitan:
System.Web.dll

Mengembalikan nilai yang menunjukkan apakah objek saat ini TemplateInstanceAttribute sama dengan objek default TemplateInstanceAttribute .

public:
 override bool IsDefaultAttribute();
public override bool IsDefaultAttribute ();
override this.IsDefaultAttribute : unit -> bool
Public Overrides Function IsDefaultAttribute () As Boolean

Mengembalikan

Boolean

true jika nilai instans TemplateInstanceAttribute saat ini adalah default; jika tidak, false.

Contoh

Contoh kode berikut menunjukkan cara menggunakan IsDefaultAttribute metode . Jika terjadi Page_Load halaman ASPX, MyLoginViewA kelas kontrol TemplateInstanceAttribute kustom untuk AnonymousTemplate properti dikueri.

Untuk definisi MyLoginViewA kontrol, lihat TemplateInstanceAttribute.

protected void Page_Load(object sender, EventArgs e)
{
      
  // Get the class type for which to access metadata.
  Type clsType = typeof(MyLoginViewA);
  // Get the PropertyInfo object for FirstTemplate.
  PropertyInfo pInfo = clsType.GetProperty("AnonymousTemplate");
  // See if the TemplateInstanceAttribute is defined for this property.
  bool isDef = Attribute.IsDefined(pInfo, typeof(TemplateInstanceAttribute));

  // Display the result if the attribute exists.
  if (isDef)
  {
    TemplateInstanceAttribute tia =
      (TemplateInstanceAttribute)Attribute.GetCustomAttribute(pInfo, typeof(TemplateInstanceAttribute));
    Response.Write("The <AnonymousTemplate> has the TemplateInstanceAttribute = " + tia.Instances.ToString() + ".<br />");
    if (tia.IsDefaultAttribute())
      Response.Write("The TemplateInstanceAttribute used is the same as the default instance.");
    else
      Response.Write("The TemplateInstanceAttribute used is not the same as the default instance.");
  }

}

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
  
  ' Get the class type for which to access metadata.
  Dim clsType As Type = GetType(MyLoginViewA)
  ' Get the PropertyInfo object for FirstTemplate.
  Dim pInfo As PropertyInfo = clsType.GetProperty("AnonymousTemplate")
  ' See if the TemplateInstanceAttribute is defined for this property.
  Dim isDef As Boolean = Attribute.IsDefined(pInfo, GetType(TemplateContainerAttribute))
  
  ' Display the result if the attribute exists.
  If isDef Then
    Dim tia As TemplateInstanceAttribute = CType(Attribute.GetCustomAttribute(pInfo, GetType(TemplateInstanceAttribute)), TemplateInstanceAttribute)
    Response.Write("The <AnonymousTemplate> has the TemplateInstanceAttribute = " & tia.Instances.ToString() & ".<br />")
    If (tia.IsDefaultAttribute()) Then
      Response.Write("The TemplateInstanceAttribute used is the same as the default instance.")
    Else
      Response.Write("The TemplateInstanceAttribute used is not the same as the default instance.")
    End If

  End If

End Sub

Keterangan

Nilai default untuk TemplateInstanceAttribute kelas adalah Multiple bidang .

Berlaku untuk

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