ControlDesigner.TemplateGroups Eigenschaft
Definition
Wichtig
Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.
Ruft eine Auflistung vom Vorlagengruppen ab, die jeweils eine oder mehrere Definitionen enthalten.
public:
virtual property System::Web::UI::Design::TemplateGroupCollection ^ TemplateGroups { System::Web::UI::Design::TemplateGroupCollection ^ get(); };public virtual System.Web.UI.Design.TemplateGroupCollection TemplateGroups { get; }member this.TemplateGroups : System.Web.UI.Design.TemplateGroupCollectionPublic Overridable ReadOnly Property TemplateGroups As TemplateGroupCollectionEigenschaftswert
Eine Auflistung von TemplateGroup-Objekten. Standard ist eine leere TemplateGroupCollection.
Beispiele
Im folgenden Codebeispiel wird veranschaulicht, wie Sie eine Steuerelement-Designerklasse erstellen, die von der ControlDesigner Klasse abgeleitet wird. Dieser Steuerelement-Designer unterstützt ein Steuerelement mit vier möglichen Vorlagen.
Um ihn zu testen, kompilieren Sie den Code, und zeigen Sie dann in einem Entwurfshost wie Visual Studio 2005 die Seite in der Entwurfsansicht an. Wählen Sie das Steuerelement aus, klicken Sie auf die Aktionsliste, um eine zu ändernde Vorlage auszuwählen, und verwenden Sie dann das Drag-and-Drop-Feature, um Steuerelemente in die Vorlage zu verschieben.
using System;
using System.ComponentModel;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.Design;
namespace ASPNet.Design.Samples
{
// Set an attribute reference to the designer, and define
// the HTML markup that the toolbox will write into the source.
[Designer(typeof(TemplateGroupsSampleDesigner)),
ToolboxData("<{0}:TemplateGroupsSample runat=server></{0}:TemplateGroupsSample>")]
public sealed class TemplateGroupsSample : WebControl, INamingContainer
{
// Field for the templates
private ITemplate[] _templates;
// Constructor
public TemplateGroupsSample()
{
_templates = new ITemplate[4];
}
// For each template property, set the designer attributes
// so the property does not appear in the property grid, but
// changes to the template are persisted in the control.
[Browsable(false),
PersistenceMode(PersistenceMode.InnerProperty)]
public ITemplate Template1
{
get { return _templates[0]; }
set { _templates[0] = value; }
}
[Browsable(false),
PersistenceMode(PersistenceMode.InnerProperty)]
public ITemplate Template2
{
get { return _templates[1]; }
set { _templates[1] = value; }
}
[Browsable(false),
PersistenceMode(PersistenceMode.InnerProperty)]
public ITemplate Template3
{
get { return _templates[2]; }
set { _templates[2] = value; }
}
[Browsable(false),
PersistenceMode(PersistenceMode.InnerProperty)]
public ITemplate Template4
{
get { return _templates[3]; }
set { _templates[3] = value; }
}
protected override void CreateChildControls()
{
// Instantiate each template inside a panel
// then add the panel to the Controls collection
for (int i = 0; i < 4; i++)
{
Panel pan = new Panel();
_templates[i].InstantiateIn(pan);
this.Controls.Add(pan);
}
}
}
// Designer for the TemplateGroupsSample control
public class TemplateGroupsSampleDesigner : ControlDesigner
{
TemplateGroupCollection col = null;
public override void Initialize(IComponent component)
{
// Initialize the base
base.Initialize(component);
// Turn on template editing
SetViewFlags(ViewFlags.TemplateEditing, true);
}
// Add instructions to the placeholder view of the control
public override string GetDesignTimeHtml()
{
return CreatePlaceHolderDesignTimeHtml("Click here and use " +
"the task menu to edit the templates.");
}
public override TemplateGroupCollection TemplateGroups
{
get
{
if (col == null)
{
// Get the base collection
col = base.TemplateGroups;
// Create variables
TemplateGroup tempGroup;
TemplateDefinition tempDef;
TemplateGroupsSample ctl;
// Get reference to the component as TemplateGroupsSample
ctl = (TemplateGroupsSample)Component;
// Create a TemplateGroup
tempGroup = new TemplateGroup("Template Set A");
// Create a TemplateDefinition
tempDef = new TemplateDefinition(this, "Template A1",
ctl, "Template1", true);
// Add the TemplateDefinition to the TemplateGroup
tempGroup.AddTemplateDefinition(tempDef);
// Create another TemplateDefinition
tempDef = new TemplateDefinition(this, "Template A2",
ctl, "Template2", true);
// Add the TemplateDefinition to the TemplateGroup
tempGroup.AddTemplateDefinition(tempDef);
// Add the TemplateGroup to the TemplateGroupCollection
col.Add(tempGroup);
// Create another TemplateGroup and populate it
tempGroup = new TemplateGroup("Template Set B");
tempDef = new TemplateDefinition(this, "Template B1",
ctl, "Template3", true);
tempGroup.AddTemplateDefinition(tempDef);
tempDef = new TemplateDefinition(this, "Template B2",
ctl, "Template4", true);
tempGroup.AddTemplateDefinition(tempDef);
// Add the TemplateGroup to the TemplateGroupCollection
col.Add(tempGroup);
}
return col;
}
}
// Do not allow direct resizing unless in TemplateMode
public override bool AllowResize
{
get
{
if (this.InTemplateMode)
return true;
else
return false;
}
}
}
}
Imports System.ComponentModel
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.Design
Namespace ASPNet.Design.Samples
' Set an attribute reference to the designer, and define
' the HTML markup that the toolbox will write into the source.
<Designer(GetType(TemplateGroupsSampleDesigner)), _
ToolboxData("<{0}:TemplateGroupsSample runat=server></{0}:TemplateGroupsSample>")> _
Public Class TemplateGroupsSample
Inherits WebControl
Implements INamingContainer
' Field for the templates
Private _templates() As ITemplate
' Constructor
Public Sub New()
ReDim _templates(4)
End Sub
' For each template property, set the designer attributes
' so the property does not appear in the property grid, but
' changes to the template are persisted in the control.
<Browsable(False), _
PersistenceMode(PersistenceMode.InnerProperty)> _
Public Property Template1() As ITemplate
Get
Return _templates(0)
End Get
Set(ByVal Value As ITemplate)
_templates(0) = Value
End Set
End Property
<Browsable(False), _
PersistenceMode(PersistenceMode.InnerProperty)> _
Public Property Template2() As ITemplate
Get
Return _templates(1)
End Get
Set(ByVal Value As ITemplate)
_templates(1) = Value
End Set
End Property
<Browsable(False), _
PersistenceMode(PersistenceMode.InnerProperty)> _
Public Property Template3() As ITemplate
Get
Return _templates(2)
End Get
Set(ByVal Value As ITemplate)
_templates(2) = Value
End Set
End Property
<Browsable(False), _
PersistenceMode(PersistenceMode.InnerProperty)> _
Public Property Template4() As ITemplate
Get
Return _templates(3)
End Get
Set(ByVal Value As ITemplate)
_templates(3) = Value
End Set
End Property
Protected Overrides Sub CreateChildControls()
' Instantiate the template inside the panel
' then add the panel to the Controls collection
Dim i As Integer
For i = 0 To 3
Dim pan As New Panel()
_templates(i).InstantiateIn(pan)
Me.Controls.Add(pan)
Next
End Sub
End Class
' Designer for the TemplateGroupsSample class
Public Class TemplateGroupsSampleDesigner
Inherits System.Web.UI.Design.ControlDesigner
Private col As TemplateGroupCollection = Nothing
Public Overrides Sub Initialize(ByVal Component As IComponent)
' Initialize the base
MyBase.Initialize(Component)
' Turn on template editing
SetViewFlags(ViewFlags.TemplateEditing, True)
End Sub
' Add instructions to the placeholder view of the control
Public Overloads Overrides Function GetDesignTimeHtml() As String
Return CreatePlaceHolderDesignTimeHtml("Click here and use " & _
"the task menu to edit the templates.")
End Function
Public Overrides ReadOnly Property TemplateGroups() As TemplateGroupCollection
Get
If IsNothing(col) Then
' Get the base collection
col = MyBase.TemplateGroups
' Create variables
Dim tempGroup As TemplateGroup
Dim tempDef As TemplateDefinition
Dim ctl As TemplateGroupsSample
' Get reference to the component as TemplateGroupsSample
ctl = CType(Component, TemplateGroupsSample)
' Create a TemplateGroup
tempGroup = New TemplateGroup("Template Set A")
' Create a TemplateDefinition
tempDef = New TemplateDefinition(Me, "Template A1", ctl, "Template1", True)
' Add the TemplateDefinition to the TemplateGroup
tempGroup.AddTemplateDefinition(tempDef)
' Create another TemplateDefinition
tempDef = New TemplateDefinition(Me, "Template A2", ctl, "Template2", True)
' Add the TemplateDefinition to the TemplateGroup
tempGroup.AddTemplateDefinition(tempDef)
' Add the TemplateGroup to the TemplateGroupCollection
col.Add(tempGroup)
' Create another TemplateGroup and populate it
tempGroup = New TemplateGroup("Template Set B")
tempDef = New TemplateDefinition(Me, "Template B1", ctl, "Template3", True)
tempGroup.AddTemplateDefinition(tempDef)
tempDef = New TemplateDefinition(Me, "Template B2", ctl, "Template4", True)
tempGroup.AddTemplateDefinition(tempDef)
' Add the TemplateGroup to the TemplateGroupCollection
col.Add(tempGroup)
End If
Return col
End Get
End Property
' Do not allow direct resizing unless in TemplateMode
Public Overrides ReadOnly Property AllowResize() As Boolean
Get
If Me.InTemplateMode Then
Return True
Else
Return False
End If
End Get
End Property
End Class
End Namespace
<%@ Page Language="VB" %>
<%@ Register TagPrefix="aspSample"
Namespace="ASPNet.Design.Samples" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<aspSample:TemplateGroupsSample runat="server" ID="TGSample1">
</aspSample:TemplateGroupsSample>
</div>
</form>
</body>
</html>
Hinweise für Vererber
Sie können die TemplateGroups Auflistung direkt ändern oder sie unverändert lassen. Wenn Sie die TemplateGroups Eigenschaft außer Kraft setzen, rufen Sie die Basisimplementierung auf, bevor Sie der Auflistung Vorlagengruppen hinzufügen.