ASP.NET Tutorial/Custom Controls/TemplateContainer
Содержание
Adding a templated control to a Web page (C#)
<source lang="csharp">
<%@ Page Language="C#" %> <%@ Register Assembly="WebControlLibrary1" Namespace="WebControlLibrary1"
TagPrefix="cc1" %>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
this.TemplatedControl1.DataBind();
}
</script> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head1" runat="server">
<title>Templated Web Controls</title>
</head> <body>
<form id="form1" runat="server">
<cc1:TemplatedControl Name="John Doe" Text="Hello World!"
ID=" TemplatedControl1" runat="server">
<MessageTemplate>The user "<%# Container.Name %>"
has a message for you:
"<%#Container.Text%>"
</MessageTemplate>
</cc1:TemplatedControl>
</form>
</body> </html> File: TemplatedControl.cs
using System; using System.Collections.Generic; using System.ruponentModel; using System.Text; using System.Web.UI; using System.Web.UI.WebControls; namespace WebControlLibrary1 {
[DefaultProperty("Text")]
[ToolboxData("<{0}:TemplatedControl runat=server></{0}: TemplatedControl >")]
public class TemplatedControl : WebControl
{
private string _name;
private string _text;
private Message _message;
private ITemplate _messageTemplate;
[Browsable(false)]
public Message Message
{
get
{
EnsureChildControls();
return _message;
}
}
[PersistenceMode(PersistenceMode.InnerProperty)]
[TemplateContainer(typeof(Message))]
public virtual ITemplate MessageTemplate
{
get { return _messageTemplate; }
set { _messageTemplate = value; }
}
[Bindable(true)]
[DefaultValue("")]
public string Name
{
get { return _name; }
set { _name = value; }
}
[Bindable(true)]
[DefaultValue("")]
public string Text
{
get { return _text; }
set { _text = value; }
}
public override void DataBind()
{
CreateChildControls();
ChildControlsCreated = true;
base.DataBind();
}
protected override void CreateChildControls()
{
this.Controls.Clear();
_message = new Message(Name, Text);
ITemplate template = MessageTemplate;
template.InstantiateIn(_message);
Controls.Add(_message);
}
}
}</source>
Adding a templated control to a Web page (VB)
<source lang="csharp">
<%@ Page Language="VB" %> <%@ Register Assembly="WebControlLibrary1" Namespace="WebControlLibrary1"
TagPrefix="cc1" %>
<script runat="server">
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
Me.TemplatedControl1.DataBind()
End Sub
</script> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head1" runat="server">
<title>Templated Web Controls</title>
</head> <body>
<form id="form1" runat="server">
<cc1:TemplatedControl Name="John Doe" Text="Hello World!"
ID=" TemplatedControl1" runat="server">
<MessageTemplate>The user "<%# Container.Name %>"
has a message for you:
"<%#Container.Text%>"
</MessageTemplate>
</cc1:TemplatedControl>
</form>
</body> </html>
File: TemplatedControl.vb
Imports System.ruponentModel Imports System.Web.UI Imports System.Web.UI.WebControls <DefaultProperty("Text")> _ <ToolboxData("<{0}:TemplatedControl runat=server></{0}:TemplatedControl>")> _ Public Class TemplatedControl
Inherits System.Web.UI.WebControls.WebControl
Private _name As String
Private _text As String
Private _message As Message
Private _messageTemplate As ITemplate
<Browsable(True)> Public ReadOnly Property Message() As Message
Get
EnsureChildControls()
Return _message
End Get
End Property
<PersistenceMode(PersistenceMode.InnerProperty), _
TemplateContainer(GetType(Message))> _
Public Property MessageTemplate() As ITemplate
Get
Return _messageTemplate
End Get
Set(ByVal value As ITemplate)
_messageTemplate = value
End Set
End Property
<Bindable(True), DefaultValue("")> Public Property Name() As String
Get
Return _name
End Get
Set(ByVal value As String)
_name = value
End Set
End Property
<Bindable(True), DefaultValue("")> Public Property Text() As String
Get
Return _text
End Get
Set(ByVal value As String)
_text = value
End Set
End Property
Public Overrides Sub DataBind()
CreateChildControls()
ChildControlsCreated = True
MyBase.DataBind()
End Sub
Protected Overrides Sub CreateChildControls()
Me.Controls.Clear()
_message = New Message(Name, Text)
Dim template As ITemplate = MessageTemplate
template.InstantiateIn(_message)
Controls.Add(_message)
End Sub
End Class</source>
Creating the template control container class (C#)
<source lang="csharp">
using System; using System.Collections.Generic; using System.ruponentModel; using System.Text; using System.Web.UI; using System.Web.UI.WebControls; namespace WebControlLibrary1 {
[DefaultProperty("Text")]
[ToolboxData("<{0}:TemplatedControl runat=server></{0}: TemplatedControl >")]
public class TemplatedControl : WebControl
{
private string _name;
private string _text;
private Message _message;
private ITemplate _messageTemplate;
[Browsable(false)]
public Message Message
{
get
{
EnsureChildControls();
return _message;
}
}
[PersistenceMode(PersistenceMode.InnerProperty)]
[TemplateContainer(typeof(Message))]
public virtual ITemplate MessageTemplate
{
get { return _messageTemplate; }
set { _messageTemplate = value; }
}
[Bindable(true)]
[DefaultValue("")]
public string Name
{
get { return _name; }
set { _name = value; }
}
[Bindable(true)]
[DefaultValue("")]
public string Text
{
get { return _text; }
set { _text = value; }
}
public override void DataBind()
{
CreateChildControls();
ChildControlsCreated = true;
base.DataBind();
}
protected override void CreateChildControls()
{
this.Controls.Clear();
_message = new Message(Name, Text);
ITemplate template = MessageTemplate;
template.InstantiateIn(_message);
Controls.Add(_message);
}
}
}</source>
Creating the template control container class (VB)
<source lang="csharp">
Imports System.ruponentModel Imports System.Web.UI Imports System.Web.UI.WebControls <DefaultProperty("Text")> _ <ToolboxData("<{0}:TemplatedControl runat=server></{0}:TemplatedControl>")> _ Public Class TemplatedControl
Inherits System.Web.UI.WebControls.WebControl
Private _name As String
Private _text As String
Private _message As Message
Private _messageTemplate As ITemplate
<Browsable(True)> Public ReadOnly Property Message() As Message
Get
EnsureChildControls()
Return _message
End Get
End Property
<PersistenceMode(PersistenceMode.InnerProperty), _
TemplateContainer(GetType(Message))> _
Public Property MessageTemplate() As ITemplate
Get
Return _messageTemplate
End Get
Set(ByVal value As ITemplate)
_messageTemplate = value
End Set
End Property
<Bindable(True), DefaultValue("")> Public Property Name() As String
Get
Return _name
End Get
Set(ByVal value As String)
_name = value
End Set
End Property
<Bindable(True), DefaultValue("")> Public Property Text() As String
Get
Return _text
End Get
Set(ByVal value As String)
_text = value
End Set
End Property
Public Overrides Sub DataBind()
CreateChildControls()
ChildControlsCreated = True
MyBase.DataBind()
End Sub
Protected Overrides Sub CreateChildControls()
Me.Controls.Clear()
_message = New Message(Name, Text)
Dim template As ITemplate = MessageTemplate
template.InstantiateIn(_message)
Controls.Add(_message)
End Sub
End Class</source>
