Note: This class is new in the .NET Framework version 2.0.
Defines the attribute that controls use to identify string properties containing URL values. This class cannot be inherited.
Namespace: System.Web.UI
Assembly: System.Web (in system.web.dll)

Syntax
Visual Basic (Declaration)
<AttributeUsageAttribute(AttributeTargets.Property)> _
Public NotInheritable Class UrlPropertyAttribute
Inherits Attribute
Dim instance As UrlPropertyAttribute
[AttributeUsageAttribute(AttributeTargets.Property)]
public sealed class UrlPropertyAttribute : Attribute
[AttributeUsageAttribute(AttributeTargets::Property)]
public ref class UrlPropertyAttribute sealed : public Attribute
/** @attribute AttributeUsageAttribute(AttributeTargets.Property) */
public final class UrlPropertyAttribute extends Attribute
AttributeUsageAttribute(AttributeTargets.Property)
public final class UrlPropertyAttribute extends Attribute

Remarks
The UrlPropertyAttribute attribute is an attribute applied to a control property that represents a URL. In addition to marking a string property as representing a URL, the UrlPropertyAttribute attribute defines the Filter property that identifies specific file types that can be used to filter against the property.

Example
The following code example demonstrates a class that implements a URL-specific property. In this code example, a UrlPropertyAttribute attribute is applied to the TargetUrl property of the CustomHyperLinkControl class. The attribute sets a specific file filter for ASP.NET files.
Public Class CustomHyperLinkControl
Inherits WebControl
Public Sub New()
End Sub 'New
' The TargetUrl property represents the URL that
' the custom hyperlink control navigates to.
<UrlProperty("*.aspx")> _
Public Property TargetUrl() As String
Get
Dim s As String = CStr(ViewState("TargetUrl"))
If (s Is Nothing) Then
Return String.Empty
Else
Return s
End If
End Get
Set(ByVal value As String)
ViewState("TargetUrl") = value
End Set
End Property
' The Text property represents the visible text that
' the custom hyperlink control is displayed with.
Public Overridable Property [Text]() As String
Get
Dim s As String = CStr(ViewState("Text"))
If (s Is Nothing) Then
Return String.Empty
Else
Return s
End If
End Get
Set(ByVal value As String)
ViewState("Text") = value
End Set
End Property
' Implement method to render the control.
End Class 'CustomHyperLinkControl
public class CustomHyperLinkControl : WebControl
{
public CustomHyperLinkControl() { }
// The TargetUrl property represents the URL that
// the custom hyperlink control navigates to.
[UrlProperty("*.aspx")]
public string TargetUrl
{
get
{
string s = (string)ViewState["TargetUrl"];
return ((s == null) ? String.Empty : s);
}
set
{
ViewState["TargetUrl"] = value;
}
}
// The Text property represents the visible text that
// the custom hyperlink control is displayed with.
public virtual string Text
{
get
{
string s = (string)ViewState["Text"];
return ((s == null) ? String.Empty : s);
}
set
{
ViewState["Text"] = value;
}
}
// Implement method to render the control.
}

.NET Framework Security

Inheritance Hierarchy

Thread Safety
Any public static (
Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Platforms
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

Version Information
.NET Framework
Supported in: 2.0

See Also