Introducing ViewFilters
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Here is the latest addition to AspView.
example:
<%@PageLanguage="C#"Inherits="Castle.MonoRail.Views.AspView.ViewAtDesignTime"%> <% %> Outside the filter <filter:LowerCase>Inside the LowerCaseViewFilter - this text should be viewed in lower case</filter:LowerCase> Outside the filter AGain <filter:UpperCase> Inside the UpperCaseViewFilter - this text should be viewed in upper case </filter:UpperCase> Finally - outside the filter
As you can see, the syntax is simple. Given a viewFilter, named “MyViewFilter”, you use the xml tag <filter:my> or <filter:myViewFilter>. The viewfilter itself has to be suffixed with “ViewFilter” (Just like Controllers are suffixed with “Controller”, etc.), and it has to implement IViewFilter which is defined with:
using System;using System.Collections.Generic; using System.Text; namespace Castle.MonoRail.Views.AspView {publicinterfaceIViewFilter {string ApplyOn(string input); }}
The power of the ViewFilters is than they can apply to a whole SubView, while the subview is rendered as a black box, the filter does the work AFTER the subview was rendered.
Grab the sources, play, and have fun.