TemplateContainerAttribute.ContainerType Property
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Gets the container control type.
public:
property Type ^ ContainerType { Type ^ get(); };
public Type ContainerType { get; }
member this.ContainerType : Type
Public ReadOnly Property ContainerType As Type
Property Value
The container control Type.
Examples
The following code example demonstrates how to create a templated control named TemplatedFirstControl
and associate it with a container named FirstTemplateContainer
. This allows the creation of custom controls that display the server time when the template is not specified and the template's content when the template is specified. The TemplateContainerAttribute class is used for the FirstTemplate
property and for specifying the ContainerType property as FirstTemplateContainer
.
using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections;
namespace Samples.AspNet.CS.Controls
{
[ParseChildren(true)]
public class TemplatedFirstControl : Control, INamingContainer
{
private ITemplate firstTemplate;
private String text = null;
private Control myTemplateContainer;
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
protected override void OnDataBinding(EventArgs e)
{
EnsureChildControls();
base.OnDataBinding(e);
}
[TemplateContainer(typeof(FirstTemplateContainer))]
public ITemplate FirstTemplate
{
get
{
return firstTemplate;
}
set
{
firstTemplate = value;
}
}
public String Text
{
get
{
return text;
}
set
{
text = value;
}
}
public String DateTime
{
get
{
return System.DateTime.Now.ToLongTimeString();
}
}
public Control MyTemplateContainer
{
get
{
return myTemplateContainer;
}
}
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
protected override void CreateChildControls()
{
if (FirstTemplate != null)
{
myTemplateContainer = new FirstTemplateContainer(this);
FirstTemplate.InstantiateIn(myTemplateContainer);
Controls.Add(myTemplateContainer);
}
else
{
Controls.Add(new LiteralControl(Text + " " + DateTime));
}
}
}
public class FirstTemplateContainer : Control, INamingContainer
{
private TemplatedFirstControl parent;
public FirstTemplateContainer(TemplatedFirstControl parent)
{
this.parent = parent;
}
public String Text
{
get
{
return parent.Text;
}
}
public String DateTime
{
get
{
return parent.DateTime;
}
}
}
}
' File name:templatecontainerattribute.vb.
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Collections
Namespace Samples.AspNet.VB.Controls
<ParseChildren(True)> _
Public Class VB_TemplatedFirstControl
Inherits Control
Implements INamingContainer
Private _firstTemplate As ITemplate
Private [_text] As [String] = Nothing
Private _myTemplateContainer As Control
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Protected Overrides Sub OnDataBinding(ByVal e As EventArgs)
EnsureChildControls()
MyBase.OnDataBinding(e)
End Sub
Public Property FirstTemplate() As ITemplate
Get
Return _firstTemplate
End Get
Set(ByVal value As ITemplate)
_firstTemplate = Value
End Set
End Property
Public Property [Text]() As [String]
Get
Return [_text]
End Get
Set(ByVal value As [String])
[_text] = Value
End Set
End Property
Public ReadOnly Property DateTime() As [String]
Get
Return System.DateTime.Now.ToLongTimeString()
End Get
End Property
Public ReadOnly Property MyTemplateContainer() As Control
Get
Return _myTemplateContainer
End Get
End Property
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Protected Overrides Sub CreateChildControls()
If Not (FirstTemplate Is Nothing) Then
_myTemplateContainer = New VB_FirstTemplateContainer(Me)
FirstTemplate.InstantiateIn(_myTemplateContainer)
Controls.Add(_myTemplateContainer)
Else
Controls.Add(New LiteralControl([Text] + " " + DateTime))
End If
End Sub
End Class
Public Class VB_FirstTemplateContainer
Inherits Control
Implements INamingContainer
Private _parent As VB_TemplatedFirstControl
Public Sub New(ByVal parent As VB_TemplatedFirstControl)
Me._parent = parent
End Sub
Public ReadOnly Property [Text]() As [String]
Get
Return _parent.Text
End Get
End Property
Public ReadOnly Property DateTime() As [String]
Get
Return _parent.DateTime
End Get
End Property
End Class
End Namespace 'CustomControls