ITemplate ITemplate ITemplate ITemplate Interface

Definition

Define el comportamiento para rellenar un control de servidor ASP.NET de plantilla con controles secundarios. Defines the behavior for populating a templated ASP.NET server control with child controls. Los controles secundarios representan las plantillas en línea definidas en la página. The child controls represent the inline templates defined on the page.

public interface class ITemplate
public interface ITemplate
type ITemplate = interface
Public Interface ITemplate
Derived

Examples

En el ejemplo de código siguiente se muestra un control de servidor de plantilla simple que utiliza el ITemplate interfaz para crear una propiedad de plantilla.The following code example demonstrates a simple templated server control that uses the ITemplate interface to create a templated property.

using System;
using System.Web;
using System.Web.UI;

namespace TemplateControlSamples {

    public class TemplateItem : Control, INamingContainer {
        private String     _message         = null;

        public TemplateItem(String message) {
            _message = message;
        }

        public String Message {

           get {
              return _message;
           }
           set {
              _message = value;
           }
        }
    }

    [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")]
    [ParseChildren(true)]
    public class Template1 : Control, INamingContainer {

        private ITemplate  _messageTemplate = null;
        private String     _message         = null;

        public String Message {

           get {
              return _message;
           }
           set {
              _message = value;
           }
        }

        [
            PersistenceMode(PersistenceMode.InnerProperty),
            TemplateContainer(typeof(TemplateItem))
        ]
        public ITemplate MessageTemplate {
           get {
              return _messageTemplate;
           }
           set {
              _messageTemplate = value;
           }
        }

        protected override void CreateChildControls() {

           // If a template has been specified, use it to create children.
           // Otherwise, create a single LiteralControl with the message value.

           if (MessageTemplate != null) {
              Controls.Clear();
              TemplateItem i = new TemplateItem(this.Message);
              MessageTemplate.InstantiateIn(i);
              Controls.Add(i);
           }
           else {
              this.Controls.Add(new LiteralControl(this.Message));
           }
        }
    }
}
   
Imports System
Imports System.Web
Imports System.Web.UI

Namespace TemplateControlSamplesVB

    Public Class TemplateItem
        Inherits Control
        Implements INamingContainer

        Private _message As String = Nothing

        Public Sub New(Message As String)
            _message = message
        End Sub

        Public Property Message As String
           Get
              Return _message
           End Get
           Set
              _message = Value
           End Set
        End Property
    End Class
    <System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust"), _
    ParseChildren(true)> _
    Public Class Template1VB
        Inherits Control
        Implements INamingContainer

        Private _messageTemplate As ITemplate = Nothing
        Private _message As String = Nothing

        Public Property Message As String

           Get
              Return _message
           End Get
           Set
              _message = Value
           End Set
        End Property

        <TemplateContainer(GetType(TemplateItem))> _
        Public Property MessageTemplate As ITemplate

           Get
              Return _messageTemplate
           End Get
           Set
              _messageTemplate = Value
           End Set
        End Property

        Protected Overrides Sub CreateChildControls()

           ' If a template has been specified, use it to create children.
           ' Otherwise, create a single LiteralControl with the message value.

           If Not (MessageTemplate Is Nothing)
              Controls.Clear()
              Dim I As New TemplateItem(Me.Message)
              MessageTemplate.InstantiateIn(I)
              Controls.Add(I)
           Else
              Me.Controls.Add(New LiteralControl(Me.Message))
           End If
        End Sub

    End Class

End Namespace
   

Remarks

Esta interfaz es utilizada por los controles de servidor personalizado, pero nunca se implementa por ellos.This interface is used by custom server controls, but never implemented by them. ASP.NET siempre lo implementa.ASP.NET always implements it.

Methods

InstantiateIn(Control) InstantiateIn(Control) InstantiateIn(Control) InstantiateIn(Control)

Cuando se implementa mediante una clase, define el objeto Control al que pertenecen los controles secundarios y las plantillas. When implemented by a class, defines the Control object that child controls and templates belong to. Estos controles secundarios están a su vez definidos en una plantilla en línea. These child controls are in turn defined within an inline template.

Applies to

See Also