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    <p>All depends what exactly you want to do, and how. Three options below:</p> <hr> <p>You can use route constraints for this. They are executed when evaluating the route to match to.</p> <pre><code>routes.MapRoute( "HomeWithConstraint", "Home/{action}", new {controller="Home", action="index"}, new { x = new MyCustomRouteConstraint () } ); // without constraint, i.e. if above didnt pass routes.MapRoute( "HomeWithConstraint", "Home/{action}", new {controller="Home", action="index"} ); </code></pre> <p>The MyCustomRouteConstraint type above would check for x==0 etc in your example. Not sure exactly what you want to do, but this will allow you to check conditions before running and set additional route values etc.</p> <p>See <a href="http://www.asp.net/learn/mvc/tutorial-25-cs.aspx" rel="noreferrer">here</a> for example of custom route constraints.</p> <hr> <p>Alternativly, yes you can use a custom ActionFilter, just apply it to the controller class, and it will be called before any action is executed. Something like:</p> <pre><code>public class CheckXActionFilterAttribute : ActionFilterAttribute { public override void OnActionExecuting(ActionExecutingContext filterContext) { if(x == 0) { // do something // e.g. Set ActionParameters etc } else { // do something else } } } </code></pre> <hr> <p>Another option is to have all you controllers (or the relevant ones) inherit from a custom controller you make, and override :</p> <pre><code>OnActionExecuting </code></pre> <p>See <a href="http://msdn.microsoft.com/en-us/library/system.web.mvc.controller_methods(v=VS.100).aspx" rel="noreferrer">here</a> for details.</p> <p>To do the same as the filter, or routing constraints.</p>
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    1. POHow do I get certain code to execute before every single controller action in ASP.NET MVC 2?
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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