Controlsource that applies a databinding expression against the NavigateUrl.
This property is especially useful for binding page level post back events that cause a postback to a page event. The following example is used inside of a Repeater to delete an item and the PK is passed as an event 'parameter':
<ww:wwWebImageButton runat="server" ID="btnDelete" Click="btnDelete_Click" ImageUrl="~/images/remove.gif" CssClass="hoverbutton" UrlControlSource="this.Page.GetPostbackEventReference('Page','btnDelete_Click',TRANS(pk),.T.)" />
To handle this event the event is fired and it can pick up the __EventParameter POST variable for state:
FUNCTION btnDelete_Click() lcId = Request.Form("__EventParameter") IF !this.oEntry.Delete( VAL(lcId) ) this.ErrorDisplay.ShowError("Couldn't delete entry:<br>" + this.oEntry.cErrormsg RETURN ENDIF this.ErrorDisplay.ShowMessage( "Entry deleted." ) ENDFUNC * btnDelete_Click
Note that you need to call DataBind() on this control (or its host data control like a Repeater/DataGrid) in order for this expression to be applied.
See also:Class wwWebButton
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