PersonalizableAttribute Class

Reference

Definition

Namespace:: System.Web.UI.WebControls.WebParts

Assembly:: System.Web.dll

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.

Represents the personalization attribute. This class cannot be inherited.

public ref class PersonalizableAttribute sealed : Attribute

[System.AttributeUsage(System.AttributeTargets.Property)]
public sealed class PersonalizableAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.Property)>]
type PersonalizableAttribute = class
    inherit Attribute

Public NotInheritable Class PersonalizableAttribute
Inherits Attribute

Inheritance: Object

Attribute
PersonalizableAttribute

Attributes: AttributeUsageAttribute

Examples

The following code example demonstrates how to use the PersonalizableAttribute class in code. The sample consists of an .aspx page that references a Web Part user control called ColorSelector.ascx. The following code is the .aspx file for the example.

<%@ Page Language="C#"  %>
<%@ Register TagPrefix="uc1" TagName="colorcontrol" Src="ColorSelector.ascx" %>
<!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>
         <asp:LoginName ID="LoginName1" runat="server" />
         
        <asp:LoginStatus ID="LoginStatus1" runat="server" LogoutAction="RedirectToLoginPage" />
            <br />
        <br />
         <asp:WebPartManager ID="WebPartManager1" runat="server">
        </asp:WebPartManager>
    
    </div>
        <asp:WebPartZone ID="WebPartZone1" runat="server"  Height="200" Width="200">
        <ZoneTemplate>
        <uc1:colorcontrol id="colorcontrol" runat="server" />
        </ZoneTemplate>
        </asp:WebPartZone>        
    </form>
</body>
</html>

The following code is for the ColorSelector.ascx control.

Important

This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

<%@ Control Language="C#" %>

<script runat="server">
private System.Drawing.Color userchoice;

[Personalizable]
public System.Drawing.Color UserColorChoice
{
   get
   {
     return userchoice;
   }
   set
   {
     userchoice = value;
   }
}

protected void OnRed(object src, EventArgs e)
{
  _color.BackColor = System.Drawing.Color.Red;
  UserColorChoice = System.Drawing.Color.Red;
}

protected void OnGreen(object src, EventArgs e)
{
  _color.BackColor = System.Drawing.Color.Green;
  UserColorChoice = System.Drawing.Color.Green;
}

protected void OnBlue(object src, EventArgs e)
{
  _color.BackColor = System.Drawing.Color.Blue;
  UserColorChoice = System.Drawing.Color.Blue;
}

protected void Page_Init(object src, EventArgs e)
{
  _redButton.Click   += new EventHandler(OnRed);  
  _greenButton.Click += new EventHandler(OnGreen);  
  _blueButton.Click  += new EventHandler(OnBlue);  
}

protected void Page_Load(object src, EventArgs e)
{
  if (!IsPostBack)
  {
          _color.BackColor = UserColorChoice;
  }
}

</script>
<body>
    <div>
        <asp:TextBox ID="_color" runat="server" Height="100" Width="100" />
        <br />
        <asp:button runat="server"  id="_redButton" text="Red"  /> 
          
        <asp:button runat="server"  id="_greenButton" text="Green" />
          
        <asp:button runat="server" id="_blueButton" text="Blue" />
    </div>
</body>

Remarks

The personalization attribute, Personalizable, is applied to public control properties that need to persist personalization information. ASP.NET automatically generates the code to persist or retrieve these values from the underlying data store when the control is in a Web Parts zone on a Web Parts page.

The following requirements must be met for a property to be marked as personalizable:

The property must be public and must have public get and set accessors.
The property must be a read/write property.
The property must be without parameters.
The property cannot be indexed.

Code is automatically generated to load and save personalization data for properties. Properties that support personalization are determined based on the existence of this attribute on the property and the fact that the property conforms to the constraints listed above.

Note that read-only and write-only properties are not supported for personalization. Applying this attribute to a read-only or write-only property results in an HttpException being thrown. Parameterized properties also throw an HttpException exception.

Individual properties without this attribute are excluded from personalization if no special handling through the IPersonalizable interface is used.

For more information about using attributes, see Web Parts Personalization Overview.

Constructors

PersonalizableAttribute()	Initializes a new instance of the PersonalizableAttribute class.
PersonalizableAttribute(Boolean)	Initializes a new instance of the PersonalizableAttribute class using the provided parameter.
PersonalizableAttribute(PersonalizationScope)	Initializes a new instance of the PersonalizableAttribute class using the provided parameter.
PersonalizableAttribute(PersonalizationScope, Boolean)	Initializes a new instance of the PersonalizableAttribute class using the provided parameters.

Fields

Default	Returns an attribute instance that indicates no support for personalization. This field is read-only.
NotPersonalizable	Returns an attribute instance that indicates no support for personalization. This field is read-only.
Personalizable	Returns an attribute instance that indicates support for personalization. This field is read-only.
SharedPersonalizable	Returns an attribute instance that indicates support for personalization with a shared scope. This field is read-only.
UserPersonalizable	Returns an attribute instance that indicates support for personalization in User scope. This field is read-only.

Properties

IsPersonalizable	Gets the setting that indicates whether the attribute can be personalized, as established by one of the constructors.
IsSensitive	Gets the setting that indicates whether the attribute is sensitive, as established by one of the constructors.
Scope	Gets the PersonalizationScope enumeration value for the class instance, as set by one of the constructors.
TypeId	When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute)

Methods

Equals(Object)	When overridden, returns a Boolean evaluation of the current instance of PersonalizableAttribute and another PersonalizableAttribute instance supplied as a parameter.
GetHashCode()	When overridden, returns a hash code of the attribute.
GetPersonalizableProperties(Type)	Returns a collection of PropertyInfo objects for the properties that match the parameter type and are marked as personalizable.
GetType()	Gets the Type of the current instance. (Inherited from Object)
IsDefaultAttribute()	When overridden, returns a value that indicates whether the attribute instance equals the value of the static Default field.
Match(Object)	Returns a value that indicates whether the current instance of PersonalizableAttribute and the specified PersonalizableAttribute have the same IsPersonalizable property value.
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ToString()	Returns a string that represents the current object. (Inherited from Object)

Explicit Interface Implementations

_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)	Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute)
_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)	Retrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute)
_Attribute.GetTypeInfoCount(UInt32)	Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute)
_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)	Provides access to properties and methods exposed by an object. (Inherited from Attribute)

Applies to

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