ConstructorNeedsTagAttribute Constructeurs
Définition
Important
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Initialise une nouvelle instance de la classe ConstructorNeedsTagAttribute.
Surcharges
ConstructorNeedsTagAttribute() |
Initialise une nouvelle instance de la classe ConstructorNeedsTagAttribute. |
ConstructorNeedsTagAttribute(Boolean) |
Initialise une nouvelle instance de la classe ConstructorNeedsTagAttribute. |
ConstructorNeedsTagAttribute()
Initialise une nouvelle instance de la classe ConstructorNeedsTagAttribute.
public:
ConstructorNeedsTagAttribute();
public ConstructorNeedsTagAttribute ();
Public Sub New ()
Exemples
// Attach the ConstructorNeedsTagAttribute to the custom
// SimpleControl, which is derived from WebControl. When
// this version of the constructor is used, the NeedsTag
// property is automatically set to false; therefore,
// this class does not need a tag attribute.
[ConstructorNeedsTagAttribute()]
[AspNetHostingPermission(SecurityAction.Demand,
Level=AspNetHostingPermissionLevel.Minimal)]
public sealed class SimpleControl : WebControl
{
private String UserMessage=null;
// Create a property named ControlValue.
public String ControlValue
{
get
{
return UserMessage;
}
set
{
UserMessage = value;
}
}
protected override void Render(HtmlTextWriter output)
{
output.Write("Testing the ConstructorNeedsTagAttribute class.");
}
}
' Attach the ConstructorNeedsTagAttribute to the custom
' SimpleControl, which is derived from WebControl. When
' this version of the constructor is used, the NeedsTag
' property is automatically set to false; therefore,
' this class does not need a tag attribute.
<ConstructorNeedsTagAttribute()> _
<AspNetHostingPermission(SecurityAction.Demand, _
Level:=AspNetHostingPermissionLevel.Minimal)> _
Public NotInheritable Class SimpleControl
Inherits WebControl
Private UserMessage As [String] = Nothing
' Create a property named ControlValue.
Public Property ControlValue() As [String]
Get
Return UserMessage
End Get
Set
UserMessage = value
End Set
End Property
Protected Overrides Sub Render(output As HtmlTextWriter)
output.Write("Testing the ConstructorNeedsTagAttribute class.")
End Sub
End Class
Voir aussi
S’applique à
ConstructorNeedsTagAttribute(Boolean)
Initialise une nouvelle instance de la classe ConstructorNeedsTagAttribute.
public:
ConstructorNeedsTagAttribute(bool needsTag);
public ConstructorNeedsTagAttribute (bool needsTag);
new System.Web.UI.ConstructorNeedsTagAttribute : bool -> System.Web.UI.ConstructorNeedsTagAttribute
Public Sub New (needsTag As Boolean)
Paramètres
- needsTag
- Boolean
true
pour ajouter une balise à un contrôle ; sinon, false
.
Exemples
L’exemple de code suivant crée un contrôle personnalisé simple dont le nom de balise est défini au moment de l’exécution. Voici la ligne de commande utilisée pour générer l’exécutable.
vbc /r:System.dll /r:System.Web.dll /t:library /out:myWebAppPath/Bin/vb_myconstructorNeedsTagAtt.dll constructNeedsTagAtt.vb
csc /t:library /out:myWebAppPath/Bin/cs_myConstructorNeedsTagAtt.dll constructorNeedsTagAtt.cs
/* File Name: constructorneedstagatt.cs. */
using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
namespace MyUserControl
{
// Attach the 'ConstructorNeedsTagAttribute' to 'Simple' class.
[ConstructorNeedsTagAttribute(true)]
public class Simple : WebControl
{
private String NameTag = "";
public Simple(String tag)
{
this.NameTag = tag;
}
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")]
protected override void Render(HtmlTextWriter output)
{
output.Write("<br>The TagName used for the 'Simple' control is "+"'"+NameTag+"'");
}
}
}
' File name: constructorneedstagatt.cs.
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.ComponentModel
Namespace MyUserControl
<ConstructorNeedsTagAttribute(True)> _
Public Class Simple
Inherits WebControl
Private NameTag As [String] = ""
Public Sub New(tag As [String])
Me.NameTag = tag
End Sub
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Protected Overrides Sub Render(output As HtmlTextWriter)
output.Write(("<br>The TagName used for the 'Simple' control is " + "'" + NameTag + "'"))
End Sub
End Class
End Namespace 'MyUserControl
L’exemple de code suivant utilise le contrôle personnalisé précédent. Notez que les valeurs affichées dans la Register
directive reflètent la ligne de commande précédente.
<%@ Register TagPrefix='MyCurrentUserControl' Namespace='MyUserControl' Assembly='vb_myConstructorNeedsTagAtt'%>
<html>
<body>
<form method="POST" runat="server">
<MyCurrentUserControl:Simple runat="server" />
</form>
</body>
</html>
<%@ Register TagPrefix='MyCurrentUserControl' Namespace='MyUserControl' Assembly='cs_myConstructorNeedsTagAtt'%>
<html>
<body>
<form method="POST" runat="server">
<MyCurrentUserControl:Simple runat="server" />
</form>
</body>
</html>