<portlet>
...
	<portlet-properties>
		<property name="stockSymbols" type="xs:string" defaultValue="BEAS"/>
	</portlet-properties>
...
</portlet>

• The property attribute provides type specific read-write binding of an WSRP property to a page member variable (field). The property attribute can be bound to fields with types of String, int, float, bool, or DateTime. Values for fields marked with a property attribute are set during the Load event of the Page; any changes are persisted during the EndRequest event of the HttpApplication.
  PortletPropertyAttribute has two optional properties:
  

  • Key: A string that provides the key name of the property to which the member variable is bound. If the property is defined for the portlet in the wsrp-producer.xml configuration file, the key value must match the value of the name attribute for the property. If this value is not defined, the key defaults to the name of the member variable on which it is defined. Key values must be unique within a page.
  • DefaultValue: A string that provides the value to use when the property is unavailable or has not yet been set. If this value is not provided, it will default to a value based upon the type of the variable as follows:

    Property Type	Default value if not assigned
    string	String.Empty
    int, long	0
    double, float	0.0
    bool	false
    DateTime	DateTime.MinValue

  Note: You must include one of the following access modifiers on all local fields that are bound to a property using a property attribute: [protected | internal | protected internal | public]. The modifier “private” is not supported. Since “private” is the default modifier if none is specified, the modifier must not be omitted.

  [PortletProperty(Key = "stockSymbols")]
  protected string stockSymbols;
  
  [PortletProperty(DefaultValue = "orange")]
  protected String colorSelection;

• The property collection allows you to access all of the property values in the request in dictionary format. The WSRP.PortletPropertiesCollection is a true read-write collection that can be shared across pages that use Server.Transfer.

  In this example, a property collection is used to update the property value so it can be passed to another page. This sample code is taken from the Stock Quote Portlet example included with the .NET Portlet Toolkit.

  public partial class StockQuotePortlet2_Edit : System.Web.UI.Page
  {
  	string StockSymbols
  	{
  		get { return WSRPPortletContext.Current.Portlet.Properties["stockSymbols"]; }
  		set { WSRPPortletContext.Current.Portlet.Properties["stockSymbols"] = value; }
  	}
  
      protected void Page_Load(object sender, EventArgs e)
      {
          // set the stockSymbols textbox to the current property value
          if (!Page.IsPostBack)
  			stockSymbolsTextBox.Text = this.StockSymbols;
      }
  
  	protected void SaveButton_Click(object sender, EventArgs e)
      {
          // update the portlet property
  		this.StockSymbols = stockSymbolsTextBox.Text;
  		// set the mode back to view and transfer back to the view page
          WSRPPortletContext.Current.Portlet.Mode = "wsrp:view";
  		// Note: since we set the property value using the Properties collection
  		// it will be available on the destination page.
  		Server.Transfer("View.aspx");
      }
  }