ConstructorNeedsTagAttribute Class
 

Specifies that a server control needs a tag name in its constructor.

Namespace:   System.Web.UI
Assembly:  System.Web (in System.Web.dll)

SystemObject
   SystemAttribute
    System.Web.UIConstructorNeedsTagAttribute

[AttributeUsageAttribute(AttributeTargets.Class)]
public sealed class ConstructorNeedsTagAttribute : Attribute
[AttributeUsageAttribute(AttributeTargets::Class)]
public ref class ConstructorNeedsTagAttribute sealed : Attribute
[<Sealed>]
[<AttributeUsageAttribute(AttributeTargets.Class)>]
type ConstructorNeedsTagAttribute = 
    class
        inherit Attribute
    end
<AttributeUsageAttribute(AttributeTargets.Class)>
Public NotInheritable Class ConstructorNeedsTagAttribute
	Inherits Attribute
NameDescription
System_CAPS_pubmethod ConstructorNeedsTagAttribute

Initializes a new instance of the ConstructorNeedsTagAttribute class.

System_CAPS_pubmethod ConstructorNeedsTagAttribute

Initializes a new instance of the ConstructorNeedsTagAttribute class.

NameDescription
System_CAPS_pubproperty

Indicates whether a control needs a tag name in its constructor. This property is read-only.

System_CAPS_pubproperty

When implemented in a derived class, gets a unique identifier for this Attribute.(Inherited from Attribute.)

NameDescription
System_CAPS_pubmethod Equals

This API supports the product infrastructure and is not intended to be used directly from your code. Returns a value that indicates whether this instance is equal to a specified object.(Inherited from Attribute.)

System_CAPS_pubmethod GetHashCode

Returns the hash code for this instance.(Inherited from Attribute.)

System_CAPS_pubmethod GetType

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethod IsDefaultAttribute

When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.(Inherited from Attribute.)

System_CAPS_pubmethod Match

When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.(Inherited from Attribute.)

System_CAPS_pubmethod ToString

Returns a string that represents the current object.(Inherited from Object.)

NameDescription
System_CAPS_pubinterface System_CAPS_privmethod _AttributeGetIDsOfNames

Maps a set of names to a corresponding set of dispatch identifiers.(Inherited from Attribute.)

System_CAPS_pubinterface System_CAPS_privmethod _AttributeGetTypeInfo

Retrieves the type information for an object, which can be used to get the type information for an interface.(Inherited from Attribute.)

System_CAPS_pubinterface System_CAPS_privmethod _AttributeGetTypeInfoCount

Retrieves the number of type information interfaces that an object provides (either 0 or 1).(Inherited from Attribute.)

System_CAPS_pubinterface System_CAPS_privmethod _AttributeInvoke

Provides access to properties and methods exposed by an object.(Inherited from Attribute.)

For background information, see Extending Metadata Using Attributes.


  // Attach the ConstructorNeedsTagAttribute to the custom Simple
  // class, which is derived from the WebControl class. This 
  // instance of the ConstructorNeedsTagAttribute class sets the
  // NeedsTag property to true.
  [ConstructorNeedsTagAttribute(true)]
  [AspNetHostingPermission(SecurityAction.Demand, 
     Level=AspNetHostingPermissionLevel.Minimal)]
  public sealed class Simple : WebControl 
  {
     private String NameTag = "";

     public Simple(String tag)
      {
            this.NameTag = tag;
      }         

      private String   UserMessage = null;

      // Create a property named ControlValue.
      public String ControlValue 
      {
         get 
         {
            return UserMessage;
         }
         set 
         {
            UserMessage = value;
         }
      }                



      protected override void Render(HtmlTextWriter output) 
      {
         output.Write("Testing the ConstructorNeedsTagAttribute Class.");
      }
}      
' Attach the ConstructorNeedsTagAttribute to the custom Simple
' class, which is derived from the WebControl class. This 
' instance of the ConstructorNeedsTagAttribute class sets the
' NeedsTag property to true.
<ConstructorNeedsTagAttribute(True)>  _
<AspNetHostingPermission(SecurityAction.Demand, _
  Level:=AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class Simple
  Inherits WebControl

  Private NameTag As String = ""


  Public Sub New(tag As String)
     Me.NameTag = tag
  End Sub 'NewNew

  Private UserMessage As String = Nothing

  ' Create a property named ControlValue.   
  Public Property ControlValue() As [String]
     Get
        Return UserMessage
     End Get
     Set
        UserMessage = value
     End Set
  End Property

  Protected Overrides Sub Render(output As HtmlTextWriter)
     output.Write("Testing the ConstructorNeedsTagAttribute Class.")
  End Sub 'Render
End Class 'Simple
.NET Framework
Available since 1.1

Any public static ( Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Return to top