TemplateInstanceAttribute.IsDefaultAttribute Metod

public:
 override bool IsDefaultAttribute();

public override bool IsDefaultAttribute();

override this.IsDefaultAttribute : unit -> bool

Public Overrides Function IsDefaultAttribute () As Boolean

Returer

true om värdet för den aktuella instansen av TemplateInstanceAttribute är standardvärdet, falseannars .

Exempel

I följande kodexempel visas hur du använder IsDefaultAttribute metoden. Page_Load I händelse av en ASPX-sida efterfrågas den MyLoginViewA anpassade kontrollens TemplateInstanceAttribute klass för AnonymousTemplate egenskapen.

Definitionen av kontrollen MyLoginViewAfinns i 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

Kommentarer

Standardvärdet för TemplateInstanceAttribute klassen är fältet Multiple .

Se även

• Equals(Object)
• Multiple