EditorPartDesigner Classe

Definição

public ref class EditorPartDesigner : System::Web::UI::Design::WebControls::WebParts::PartDesigner

public class EditorPartDesigner : System.Web.UI.Design.WebControls.WebParts.PartDesigner

type EditorPartDesigner = class
    inherit PartDesigner

Public Class EditorPartDesigner
Inherits PartDesigner

Herança

Object

ComponentDesigner

HtmlControlDesigner

ControlDesigner

CompositeControlDesigner

PartDesigner

EditorPartDesigner

Exemplos

O exemplo de código a seguir cria um controle personalizado EditorPart simples que permite que o usuário altere a ToolTip propriedade do controle de destino. O associado EditorPartDesigner valida o controle e substitui a caixa de texto de entrada do usuário em tempo de design por um rótulo explicando que ele está oculto.

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.ComponentModel;
using System.Security.Permissions;
using System.Web.UI.Design.WebControls.WebParts;

/// <summary>
/// SecretEditorPart is a custom EditorPart control that
/// allows the end user to change the ToolTip property of
/// a control by typing the value into a TextBox. 
/// SecretEditorPartDesigner hides the TextBox at design
/// time via the view control and replaces it with the 
/// words "The textbox is now hidden."
/// </summary>
namespace Samples.AspNet.CS.Controls
{
    [Designer(typeof(SecretEditorPartDesigner))]
    public class SecretEditorPart : EditorPart
    {
        public CheckBox UseCustom = new CheckBox();
        public TextBox TTTextBox = new TextBox();

        protected override void CreateChildControls()
        {
            base.CreateChildControls();
            Controls.Add(UseCustom);
            Literal lApply = new Literal();
            lApply.Text = "Apply custom ToolTip<br />";
            Controls.Add(lApply);
            Controls.Add(TTTextBox);
        }

        public override bool ApplyChanges()
        {
            EnsureChildControls();
            try
            {
                WebPartToEdit.ToolTip = TTTextBox.Text;
            }
            catch
            {
                return false;
            }
            return true;
        }

        public override void SyncChanges()
        {
            // Abstract method not implemented for this example
            return;
        }
    }

    public class SecretEditorPartDesigner : EditorPartDesigner
    {
        public override void Initialize(IComponent component)
        {
            // Validate the associated control
            if (! (component is SecretEditorPart))
            {
                string msg = "The associated control must be of type 'SecretEditorPart'";
                throw new ArgumentException(msg);
            }
            base.Initialize(component);
        }

        public override string GetDesignTimeHtml()
        {
            // Access the view control.
            SecretEditorPart sep = (SecretEditorPart)ViewControl;
           
            // Hide the textbox.
            sep.TTTextBox.Visible = false;

            // Now generate the base rendering.
            string designTimeHtml = base.GetDesignTimeHtml();

            // Insert some text.
            string segment = "</div>";
            designTimeHtml = designTimeHtml.Replace(segment, 
                "The textbox is now hidden." + segment);
            
            // Return the modified rendering.
            return designTimeHtml;
        }
    }
}

Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts
Imports System.ComponentModel
Imports System.Security.Permissions
Imports System.Web.UI.Design.WebControls.WebParts

' SecretEditorPart is a custom EditorPart control that
' allows the end user to change the ToolTip property of
' a control by typing the value into a TextBox. 
' SecretEditorPartDesigner hides the TextBox at design
' time via the view control and replaces it with the 
' words "The textbox is now hidden."
Namespace Samples.AspNet.VB.Controls
    <Designer(GetType(SecretEditorPartDesigner))> _
    Public Class SecretEditorPart
        Inherits EditorPart
        Public UseCustom As New CheckBox()
        Public TTTextBox As New TextBox()

        Protected Overrides Sub CreateChildControls()
            MyBase.CreateChildControls()
            Controls.Add(UseCustom)
            Dim lApply As New Literal()
            lApply.Text = "Apply custom ToolTip<br />"
            Controls.Add(lApply)
            Controls.Add(TTTextBox)
        End Sub

        Public Overrides Function ApplyChanges() As Boolean
            EnsureChildControls()
            Try
                WebPartToEdit.ToolTip = TTTextBox.Text
            Catch
                Return False
            End Try
            Return True
        End Function

        Public Overrides Sub SyncChanges()
            ' Abstract method not implemented for this example
            Return
        End Sub
    End Class

    Public Class SecretEditorPartDesigner
        Inherits EditorPartDesigner
        Public Overrides Sub Initialize(component As IComponent)
            ' Validate the associated control
            If Not (TypeOf component Is SecretEditorPart) Then
                Dim msg As String = "The associated control must be of type 'SecretEditorPart'"
                Throw New ArgumentException(msg)
            End If
            MyBase.Initialize(component)
        End Sub

        Public Overrides Function GetDesignTimeHtml() As String
            ' Access the view control.
            Dim sep As SecretEditorPart = DirectCast(ViewControl, SecretEditorPart)

            ' Hide the textbox.
            sep.TTTextBox.Visible = False

            ' Now generate the base rendering.
            Dim designTimeHtml As String = MyBase.GetDesignTimeHtml()

            ' Insert some text.
            Dim segment As String = "</div>"
            designTimeHtml = designTimeHtml.Replace(segment, "The textbox is now hidden." & segment)

            ' Return the modified rendering.
            Return designTimeHtml
        End Function
    End Class
End Namespace

Para que o controle personalizado seja renderizado, a página deve ter um WebPartManager controle , um EditorZone com um ZoneTemplate para que o controle resida e um WebPartZone que contenha um controle para que o personalizado EditorPart atue, conforme mostrado no exemplo de código a seguir.

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<%@ Register TagPrefix="ccl" Namespace="Samples.AspNet.CS.Controls" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>EditorPartDesigner Sample</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:WebPartManager ID="WebPartManager1" runat="server">
        </asp:WebPartManager><br />
        <asp:EditorZone ID="EditorZone1" runat="server" Enabled="true" >
            <ZoneTemplate>
                <ccl:SecretEditorPart ID="SEPart1" runat="server" />
            </ZoneTemplate>
        </asp:EditorZone>
        <asp:WebPartZone ID="WebPartZone1" runat="server">
            <ZoneTemplate>
                <asp:Button ID="Button1" runat="server" Height="24px" Text="Button" />
            </ZoneTemplate>
        </asp:WebPartZone><br />
    </div>
    </form>
</body>
</html>

<%@ Page Language="VB" AutoEventWireup="true"  CodeFile="Default.aspx.vb" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<%@ Register TagPrefix="ccl" Namespace="Samples.AspNet.VB.Controls" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>EditorPartDesigner Sample</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:WebPartManager ID="WebPartManager1" runat="server">
        </asp:WebPartManager><br />
        <asp:EditorZone ID="EditorZone1" runat="server" Enabled="true" >
            <ZoneTemplate>
                <ccl:SecretEditorPart ID="SEPart1" runat="server" />
            </ZoneTemplate>
        </asp:EditorZone>
        <asp:WebPartZone ID="WebPartZone1" runat="server">
            <ZoneTemplate>
                <asp:Button ID="Button1" runat="server" Height="24px" Text="Button" />
            </ZoneTemplate>
        </asp:WebPartZone><br />
    </div>
    </form>
</body>
</html>

Para que o EditorPart seja utilizável em tempo de execução, o modo de edição deve ser habilitado na página. O exemplo de código a seguir demonstra como fazer isso com um arquivo code-behind.

using System;
using System.Web.UI.WebControls.WebParts;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        {
            // Make the 'Edit' verb available so the EditorZone can render
            WebPartManager mgr = WebPartManager.GetCurrentWebPartManager(Page);
            mgr.DisplayMode = mgr.SupportedDisplayModes["Edit"];
        }
    }
}

Imports System.Web.UI.WebControls.WebParts

Public Partial Class _Default
    Inherits System.Web.UI.Page
    Protected Sub Page_Load(sender As Object, e As EventArgs)
        If True Then
            ' Make the 'Edit' verb available so the EditorZone can render
            Dim mgr As WebPartManager = WebPartManager.GetCurrentWebPartManager(Page)
            mgr.DisplayMode = mgr.SupportedDisplayModes("Edit")
        End If
    End Sub
End Class

Comentários

EditorPartDesigner é uma implementação pública da PartDesigner classe base para fins de renderização EditorPart de controles em tempo de design. Ele adiciona a capacidade de transportar informações de zona do controle associado à exibição de design, mas não altera de outra forma a funcionalidade do controle pai.

Assim como acontece com outros designers de controle, você pode alterar a renderização em tempo de design de controles personalizados EditorPart herdando e EditorPartDesigner substituindo o GetDesignTimeHtml método . Se você quiser substituir o CreateViewControl método , inclua a implementação base para manter as informações de zona.

Construtores

Propriedades

Métodos

Implantações explícitas de interface

Aplica-se a

Confira também

• ControlDesigner
• EditorPart
• WebPartDesigner
• Controles de Web Parts do ASP.NET
• Visão geral dos designers de controle de ASP.NET