Question

I’ve recently set up an ASP.net site (not using MVC.net) to use URL Routing (more on the code below) – when using user controls on the site (i.e I’ve created a “menu” user control to hold menu information) the page_load event for that control will fire twice when URLs have more than one variable passed over.

i.e.

pageName/VAR1 : will only fire the page_load event once.

while

pageName/VAR1/VAR2 : will fire the page_load event twice.

*Multiple extra VARs added on the end will still only fire the page_load event twice*.

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Below are the code snippits from the files, the first is the MapPageRoute, located in the Global.asax :

// Register a route for the Example page, with the NodeID and also the Test123 variables allowed.
// This demonstrates how to have several items linked with the page routes.
    routes.MapPageRoute(
        "Multiple Data Example",                    // Route name
        "Example/{NodeID}/{test123}/{variable}",     // Route URL - note the NodeID bit
        "~/Example.aspx",                            // Web page to handle route
        true,                                        // Check for physical access
        new System.Web.Routing.RouteValueDictionary 
        { 
            { "NodeID", "1" },        // Default Node ID
            { "test123", "1" },       // Default addtional variable value
            { "variable", "hello"}    // Default test variable value
        }  
    );

Next is the way I’ve directed to the page in the menu item, this is a list item within a UL tag :

<li class="TopMenu_ListItem"><a href="<%= Page.GetRouteUrl("Multiple Data Example", new System.Web.Routing.RouteValueDictionary { { "NodeID", "4855" }, { "test123", "2" } }) %>">Example 2</a></li>

And finally the control that gets hit multiple times on a page load :

// For use when the page loads.
    protected void Page_Load(object sender, EventArgs e)
    {
        // Handle the routing variables.
        // this handles the route data value for NodeID - if the page was reached using URL Routing.
        if (Page.RouteData.Values["NodeID"] != null)
        {
            nodeID = Page.RouteData.Values["NodeID"] as string;
        };

        // this handles the route data value for Test123 - if the page was reached using URL Routing.
        if (Page.RouteData.Values["Test123"] != null)
        {
            ExampleOutput2.Text = "I am the output of the third variable : " + Page.RouteData.Values["Test123"] as string;
        };

        // this handles the route data value for variable - if the page was reached using URL Routing.
        if (Page.RouteData.Values["variable"] != null)
        {
            ExampleOutput3.Text = "I say " + Page.RouteData.Values["variable"] as string;
        };
    }

Note, that when I’m just hitting the page and it uses the default values for items, the reloads do not happen.

---

Any help or guidance that anyone can offer would be very much appreciated!

EDIT : The User Control is only added to the page once. I’ve tested the load sequence by putting a breakpoint in the page_load event – it only hits twice when the extra routes are added.

EDIT2 : Thanks again to those who’ve helped out so far – I’m still having trouble finding the cause of the double load – does anyone else have any more suggestions?

EDIT3/Answer : The answer below explains how to fix the problem – essentially remove any ../ references to Javascript files from the initial site creation/includes. I hope that this helps anyone else who has this problem!

Thanks in Advance,

Paul Hutson

Answer 1

Having tried a number of things I have discovered that if any file has a ../ before it (in an include on any page) it will cause the URL Routing problem described above.

Simply making sure that no file was referenced using ../ solved the problem entirely – specifically it was the Javascript files that were causing the problem.