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01-09-2008, 1:44 PM leblanc Joined on 01-07-2008 Posts 15 Control Adapters One of the biggest problems i had with asp.net is it didn't seperate control properties from its visual appearance. control adapters fixed this by using a visitor pattern which contains logic on how the control renders itself. although i understand the theory i've never done it.  Is anyone designing using control adapters? here are practical problems: 1) <form action="" method="post"> rewriting the action attribute.  See i'm using apache to proxy an asp.net site so that apache handles all the rewrite rules. provides ssl - with openssl.  support for wildcard.domain.com.  Currently i have javascript rewriting it.. but i would like to hardcode the value on the server side. 2) highlight text from search engines.  this is simple in php as i start ob_start hold my buffer and get the final string value when the page is finished processing... then i just run a regex to replace text with a highlighted version.  In asp.net things fire differently and holding the buffer doesn't aways work.  If i can generate a control adapter containing this logic.. i could pass it to the page class which renders the page... or at least to my master page content panels.    Report

02-13-2008, 11:01 PM leblanc Joined on 01-07-2008 Posts 15 Re: Control Adapters Answer to #1: <font face="Lucida Console" size="2"> namespace RobustHaven.KnowledgeBase { public class Form : System.Web.UI.HtmlControls.HtmlForm { public Form():base() { } protected override void RenderAttributes(HtmlTextWriter writer) { writer.WriteAttribute(&quot;id&quot;, this.ID); writer.WriteAttribute(&quot;method&quot;, this.Method); writer.WriteAttribute(&quot;action&quot;, &quot;&quot;); } } } </font> by default the browser will post back to the same url as in the url bar. <font face="Lucida Console" size="2"> &lt;pages&gt; &lt;tagMapping&gt; &lt;add tagType=&quot;System.Web.UI.HtmlControls.HtmlForm&quot; mappedTagType=&quot;RobustHaven.KnowledgeBase.Form&quot;/&gt; &lt;/tagMapping&gt; &lt;/pages&gt; </font>    Report

02-13-2008, 11:50 PM leblanc Joined on 01-07-2008 Posts 15 Re: Control Adapters answer to #2 since i don't know how to add code to this forum... i posted the code on nopaste. http://rafb.net/p/W0hYNW59.html the idea is to replace the default contentplaceholder in a master page with my custom version which sends in the custom htmltextwriter which will add highlighting and remove duplicate spacing [don't forget to skip pre tag content].    Report

02-15-2008, 8:49 AM tbarcz Joined on 06-22-2005 Posts 44 Re: Control Adapters  I can't explain entirely how it all works, but I do know that in one version of our product we had implemented one of the control adapters for the sole purpose of controlling the HTML markup emitted from controls in order to have accessible HTML markup.  In our industry (health-care) accessibility becomes important, and therefore had wanted to use some of the out-of-the-box controls like the LoginForm but needed to make them accessible, we used control adapters. If you want me to, I can look at what we did for some specific answers if you still have them. Tim    Report

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