ControlDesigner.AutoFormats Propiedad

Definición

Obtiene la colección de esquemas de formato automático predefinidos para mostrarla en tiempo de diseño en el cuadro de diálogo Formato automático correspondiente al control asociado.

public:
 virtual property System::Web::UI::Design::DesignerAutoFormatCollection ^ AutoFormats { System::Web::UI::Design::DesignerAutoFormatCollection ^ get(); };
public virtual System.Web.UI.Design.DesignerAutoFormatCollection AutoFormats { get; }
member this.AutoFormats : System.Web.UI.Design.DesignerAutoFormatCollection
Public Overridable ReadOnly Property AutoFormats As DesignerAutoFormatCollection

Valor de propiedad

DesignerAutoFormatCollection

Objeto DesignerAutoFormatCollection que contiene los esquemas predefinidos del control.

Ejemplos

En el ejemplo de código siguiente se muestra cómo implementar la AutoFormats propiedad en un diseñador de controles personalizado. El diseñador de controles derivado implementa la AutoFormats propiedad agregando tres instancias de un formato automático personalizado derivado de la DesignerAutoFormat clase .

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Web.UI;
using System.Web.UI.Design;
using System.Web.UI.Design.WebControls;
using System.Web.UI.WebControls;

namespace CustomControls.Design.CS
{
    // A custom Label control whose contents can be indented
    [Designer(typeof(IndentLabelDesigner)), 
        ToolboxData("<{0}:IndentLabel Runat=\"server\"></{0}:IndentLabel>")]
    public class IndentLabel : Label
    {
        private int _indent = 0;

        // Property to indent all text within the label
        [Category("Appearance"), DefaultValue(0), 
            PersistenceMode(PersistenceMode.Attribute)]
        public int Indent
        {
            get { return _indent; }
            set
            {
                _indent = value;
                // Get the number of pixels to indent
                int ind = value * 8;

                //  Add the indent style to the control
                if (ind > 0)
                    this.Style.Add(HtmlTextWriterStyle.MarginLeft, ind.ToString() + "px");
                else
                    this.Style.Remove(HtmlTextWriterStyle.MarginLeft);
            }
        }
    }

    // A design-time ControlDesigner for the IndentLabel control
    [SupportsPreviewControl(true)]
    public class IndentLabelDesigner : LabelDesigner
    {
        private DesignerAutoFormatCollection _autoFormats = null;

        // The collection of AutoFormat objects for the IndentLabel object
        public override DesignerAutoFormatCollection AutoFormats
        {
            get
            {
                if (_autoFormats == null)
                {
                    // Create the collection
                    _autoFormats = new DesignerAutoFormatCollection();

                    // Create and add each AutoFormat object
                    _autoFormats.Add(new IndentLabelAutoFormat("MyClassic"));
                    _autoFormats.Add(new IndentLabelAutoFormat("MyBright"));
                    _autoFormats.Add(new IndentLabelAutoFormat("Default"));
                }
                return _autoFormats;
            }
        }

        // An AutoFormat object for the IndentLabel control
        private class IndentLabelAutoFormat : DesignerAutoFormat
        {
            public IndentLabelAutoFormat(string name) : base(name)
            { }

            // Applies styles based on the Name of the AutoFormat
            public override void Apply(Control inLabel)
            {
                if (inLabel is IndentLabel)
                {
                    IndentLabel ctl = (IndentLabel)inLabel;

                    // Apply formatting according to the Name
                    if (this.Name == "MyClassic")
                    {
                        // For MyClassic, apply style elements directly to the control
                        ctl.ForeColor = Color.Gray;
                        ctl.BackColor = Color.LightGray;
                        ctl.Font.Size = FontUnit.XSmall;
                        ctl.Font.Name = "Verdana,Geneva,Sans-Serif";
                    }
                    else if (this.Name == "MyBright")
                    {
                        // For MyBright, apply style elements to the Style property
                        this.Style.ForeColor = Color.Maroon;
                        this.Style.BackColor = Color.Yellow;
                        this.Style.Font.Size = FontUnit.Medium;

                        // Merge the AutoFormat style with the control's style
                        ctl.MergeStyle(this.Style);
                    }
                    else
                    {
                        // For the Default format, apply style elements to the control
                        ctl.ForeColor = Color.Black;
                        ctl.BackColor = Color.Empty;
                        ctl.Font.Size = FontUnit.XSmall;
                    }
                }
            }
        }
    }
}
Imports System.Drawing
Imports System.Collections
Imports System.ComponentModel
Imports System.Web.UI
Imports System.Web.UI.Design
Imports System.Web.UI.Design.WebControls
Imports System.Web.UI.WebControls

Namespace CustomControls.Design

    ' A custom Label control whose contents can be indented
    <Designer(GetType(IndentLabelDesigner)), _
        ToolboxData("<{0}:IndentLabel Runat=""server""></{0}:IndentLabel>")> _
    Public Class IndentLabel
        Inherits System.Web.UI.WebControls.Label

        Dim _indent As Integer = 0

        <Category("Appearance"), DefaultValue(0), _
            PersistenceMode(PersistenceMode.Attribute)> _
        Property Indent() As Integer
            Get
                Return _indent
            End Get
            Set(ByVal Value As Integer)
                _indent = Value

                ' Get the number of pixels to indent
                Dim ind As Integer = _indent * 8

                ' Add the indent style to the control
                If ind > 0 Then
                    Me.Style.Add(HtmlTextWriterStyle.MarginLeft, ind.ToString() & "px")
                Else
                    Me.Style.Remove(HtmlTextWriterStyle.MarginLeft)
                End If
            End Set
        End Property

    End Class

    ' A design-time ControlDesigner for the IndentLabel control
    Public Class IndentLabelDesigner
        Inherits LabelDesigner

        Private _autoFormats As DesignerAutoFormatCollection = Nothing
        ' The collection of AutoFormat objects for the IndentLabel object
        Public Overrides ReadOnly Property AutoFormats() As DesignerAutoFormatCollection
            Get
                If _autoFormats Is Nothing Then
                    ' Create the collection
                    _autoFormats = New DesignerAutoFormatCollection()

                    ' Create and add each AutoFormat object
                    _autoFormats.Add(New IndentLabelAutoFormat("MyClassic"))
                    _autoFormats.Add(New IndentLabelAutoFormat("MyBright"))
                    _autoFormats.Add(New IndentLabelAutoFormat("Default"))
                End If

                Return _autoFormats
            End Get
        End Property

        ' An AutoFormat object for the IndentLabel control
        Public Class IndentLabelAutoFormat
            Inherits DesignerAutoFormat

            Public Sub New(ByVal name As String)
                MyBase.New(name)
            End Sub

            ' Applies styles based on the Name of the AutoFormat
            Public Overrides Sub Apply(ByVal inLabel As Control)
                If TypeOf inLabel Is IndentLabel Then
                    Dim ctl As IndentLabel = CType(inLabel, IndentLabel)

                    ' Apply formatting according to the Name
                    If Me.Name.Equals("MyClassic") Then
                        ' For MyClassic, apply style elements directly to the control
                        ctl.ForeColor = Color.Gray
                        ctl.BackColor = Color.LightGray
                        ctl.Font.Size = FontUnit.XSmall
                        ctl.Font.Name = "Verdana,Geneva,Sans-Serif"
                    ElseIf Me.Name.Equals("MyBright") Then
                        ' For MyBright, apply style elements to the Style object
                        Me.Style.ForeColor = Color.Maroon
                        Me.Style.BackColor = Color.Yellow
                        Me.Style.Font.Size = FontUnit.Medium

                        ' Merge the AutoFormat style with the control's style
                        ctl.MergeStyle(Me.Style)
                    Else
                        ' For the Default format, apply style elements to the control
                        ctl.ForeColor = Color.Black
                        ctl.BackColor = Color.Empty
                        ctl.Font.Size = FontUnit.XSmall
                    End If
                End If
            End Sub
        End Class
    End Class

End Namespace

Comentarios

Un control de servidor web completo incluye no solo el control, sino también, posiblemente, una clase de diseñador de controles correspondiente derivada de la ControlDesigner clase y una clase de formato derivada de la DesignerAutoFormat clase . La AutoFormats propiedad es una colección de instancias de la DesignerAutoFormat clase . Para obtener un ejemplo funcional de formato automático en Visual Studio 2005, vea Calendar.

Notas a los desarrolladores de herederos

Los controles que exponen automáticamente AutoFormats obtienen una lista de tareas y comandos de contexto para sus formatos. Cuando use formatos automáticos, use la ViewControl propiedad para establecer las propiedades en la función de devolución de llamada.

Se aplica a

Consulte también