WebPartChrome(WebPartZoneBase, WebPartManager) Constructor

Referencia

Definición

Espacio de nombres:: System.Web.UI.WebControls.WebParts

Ensamblado:: System.Web.dll

Importante

Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.

Inicializa una nueva instancia del control.

public:
 WebPartChrome(System::Web::UI::WebControls::WebParts::WebPartZoneBase ^ zone, System::Web::UI::WebControls::WebParts::WebPartManager ^ manager);

public WebPartChrome (System.Web.UI.WebControls.WebParts.WebPartZoneBase zone, System.Web.UI.WebControls.WebParts.WebPartManager manager);

new System.Web.UI.WebControls.WebParts.WebPartChrome : System.Web.UI.WebControls.WebParts.WebPartZoneBase * System.Web.UI.WebControls.WebParts.WebPartManager -> System.Web.UI.WebControls.WebParts.WebPartChrome

Public Sub New (zone As WebPartZoneBase, manager As WebPartManager)

Parámetros

zone: WebPartZoneBase

El control WebPartZoneBase asociado.

manager: WebPartManager

El control WebPartManager de la página actual.

Excepciones

ArgumentNullException

zone es null.

Ejemplos

En el ejemplo de código siguiente se muestran dos cosas. En primer lugar, crea una nueva instancia de la clase MyWebPartChrome personalizada reemplazando el CreateWebPartChrome método en una zona derivada WebPartZoneBase denominada MyZone. En segundo lugar, en el constructor de la MyWebPartChrome clase , asigna los objetos de los parámetros del constructor a campos privados que se pueden usar dentro de la clase . En este ejemplo se proporciona una manera de acceder a la zona y WebPartManager el objeto asociados incluso en el constructor, antes de que se pueda acceder a las Zone propiedades y WebPartManager . Por último, tenga en cuenta que para que el constructor funcione, el constructor base también debe invocarse como parte de la declaración de método.

El código siguiente contiene las dos clases personalizadas. Para obtener el código completo necesario para ejecutar el ejemplo, incluida la página web para hospedar estos controles, vea la sección Ejemplo del tema de información general de la WebPartChrome clase.

using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Security.Permissions;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

namespace Samples.AspNet.CS.Controls
{
  [AspNetHostingPermission(SecurityAction.Demand,
    Level = AspNetHostingPermissionLevel.Minimal)]
  [AspNetHostingPermission(SecurityAction.InheritanceDemand,
    Level = AspNetHostingPermissionLevel.Minimal)]
  public class MyZone : WebPartZone
  {
    private Boolean _renderVerbsInMenu;

    protected override WebPartChrome CreateWebPartChrome()
    {
      WebPartChrome theChrome = new MyWebPartChrome(this, 
        this.WebPartManager);
      if (RenderVerbsInMenu)
        this.WebPartVerbRenderMode = WebPartVerbRenderMode.Menu;
      else
        this.WebPartVerbRenderMode = WebPartVerbRenderMode.TitleBar;
      return theChrome;
    }

    public Boolean RenderVerbsInMenu
    {
      get { return _renderVerbsInMenu; }
      set { _renderVerbsInMenu = value; }
    }
  }

  [AspNetHostingPermission(SecurityAction.Demand,
    Level = AspNetHostingPermissionLevel.Minimal)]
  [AspNetHostingPermission(SecurityAction.InheritanceDemand,
    Level = AspNetHostingPermissionLevel.Minimal)]
  public class MyWebPartChrome : WebPartChrome
  {
    WebPartZoneBase theZone;
    WebPartManager theManager;

    public MyWebPartChrome(WebPartZoneBase aZone, WebPartManager aManager) : 
      base(aZone, aManager)
    {
      theZone = aZone;
      theManager = aManager;
    }

    protected override WebPartVerbCollection GetWebPartVerbs(WebPart webPart)
    {
      ArrayList verbSet = new ArrayList();
      foreach (WebPartVerb verb in base.GetWebPartVerbs(webPart))
      {
        if (verb.Text != "Close")
          verbSet.Add(verb);
      }
      WebPartVerbCollection reducedVerbSet = 
        new WebPartVerbCollection(verbSet);
      return reducedVerbSet;
    }

    protected override Style CreateWebPartChromeStyle(WebPart part, 
      PartChromeType chromeType)
    {
      Style finalStyle = new Style();
      finalStyle.CopyFrom(base.CreateWebPartChromeStyle(part, chromeType));
      finalStyle.Font.Name = "Verdana";
      return finalStyle;
    }

    protected override void RenderPartContents(HtmlTextWriter writer, 
      WebPart part)
    {

        if (part == this.WebPartManager.SelectedWebPart)
          HttpContext.Current.Response.Write("<span>Not rendered</span>");
        else
          if(this.Zone.GetType() == typeof(MyZone))
            part.RenderControl(writer);
    }
  }
}

Imports System.Collections
Imports System.ComponentModel
Imports System.Drawing
Imports System.Security.Permissions
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts

Namespace Samples.AspNet.VB.Controls

  <AspNetHostingPermission(SecurityAction.Demand, _
    Level:=AspNetHostingPermissionLevel.Minimal)> _
  <AspNetHostingPermission(SecurityAction.InheritanceDemand, _
    Level:=AspNetHostingPermissionLevel.Minimal)> _
  Public Class MyZone
    Inherits WebPartZone
    Private _renderVerbsInMenu As Boolean

    Protected Overrides Function CreateWebPartChrome() As WebPartChrome
      Dim theChrome As WebPartChrome = _
        New MyWebPartChrome(Me, Me.WebPartManager)
      If RenderVerbsInMenu Then
        Me.WebPartVerbRenderMode = WebPartVerbRenderMode.Menu
      Else
        Me.WebPartVerbRenderMode = WebPartVerbRenderMode.TitleBar
      End If
      Return theChrome
    End Function

    Public Property RenderVerbsInMenu() As Boolean
      Get
        Return _renderVerbsInMenu
      End Get
      Set(ByVal value As Boolean)
        _renderVerbsInMenu = value
      End Set
    End Property

  End Class

  <AspNetHostingPermission(SecurityAction.Demand, _
    Level:=AspNetHostingPermissionLevel.Minimal)> _
  <AspNetHostingPermission(SecurityAction.InheritanceDemand, _
    Level:=AspNetHostingPermissionLevel.Minimal)> _
  Public Class MyWebPartChrome
    Inherits WebPartChrome
    Dim theManager As WebPartManager
    Dim theZone As WebPartZoneBase

    Public Sub New(ByVal aZone As WebPartZoneBase, _
      ByVal aManager As WebPartManager)

      MyBase.New(aZone, aManager)
      theManager = aManager
      theZone = aZone
    End Sub

    Protected Overrides Function GetWebPartVerbs _
      (ByVal webPart As WebPart) As WebPartVerbCollection

      Dim verbSet As New ArrayList()
      Dim verb As WebPartVerb
      For Each verb In MyBase.GetWebPartVerbs(webPart)
        If verb.Text <> "Close" Then
          verbSet.Add(verb)
        End If
      Next verb

      Dim reducedVerbSet As WebPartVerbCollection = _
        New WebPartVerbCollection(verbSet)

      Return reducedVerbSet
    End Function

    Protected Overrides Function CreateWebPartChromeStyle _
      (ByVal part As WebPart, ByVal chromeType As PartChromeType) As Style

      Dim finalStyle As New Style()
      finalStyle.CopyFrom(MyBase.CreateWebPartChromeStyle(Part, chromeType))
      finalStyle.Font.Name = "Verdana"
      Return finalStyle
    End Function

    Protected Overrides Sub RenderPartContents _
      (ByVal writer As HtmlTextWriter, ByVal part As WebPart)

      If part Is Me.WebPartManager.SelectedWebPart Then
        HttpContext.Current.Response.Write("<span>Not rendered</span>")
      Else
        If (Me.Zone.GetType() Is GetType(MyZone)) Then
          part.RenderControl(writer)
        End If
      End If

    End Sub

  End Class

End Namespace

Comentarios

WebPartChrome inicializa una nueva instancia de la WebPartChrome clase . Se usa principalmente por una WebPartZoneBase zona en su CreateWebPartChrome método para crear una instancia del WebPartChrome objeto que controla la representación de cromo y cualquier representación personalizada para WebPart los controles de la zona.

Se aplica a

Consulte también

controles de elementos web de ASP.NET

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