Reviving Metabuilder’s DualList

Sun, May 6, 2007

Tech Tips

Update: Metabuilders.com updated their controls for Net 2.0!

Metabuilders had a free ASP.Net web control (with source) called DualList (or DynamicListBox) that worked really well in ASP.Net 1.1. I wanted to use it in 2.0 but there are some minor fixes needed in the code. Here is summary of the fixes I found here and here.

Combining this control with Telerik‘s AjaxManager is slick.

Steps to Convert DualList to ASP.Net 2.0

  1. First download the source from the metabuilders web site. Open the solution in VS 2005 and it will start the conversion wizard. When it asks about not finding the source code bindings, choose to remove them.
  2. Once the conversion is finished, the project will not compile. Open the AssemblyInfo.cs file and REMOVE:

    [assembly: AssemblyDelaySign(false)]
    [assembly: AssemblyKeyFile(“”)]
    [assembly: AssemblyKeyName(“metabuilders.com”)]

  3. Now open DynamicListBoxResourceHandler.cs, REPLACE:

    if ( context.Cache[cacheKey] == null ) {
    context.Cache.Insert(cacheKey, DetermineIsRegistered());
    }
    return (Boolean)context.Cache[cacheKey];

    WITH:

    bool bRet=false;
    //fixed cache delay, do not rely on cache available immediately after insert
    if (context.Cache[cacheKey] == null)
    {
    bRet = DetermineIsRegistered();
    context.Cache.Insert(cacheKey, bRet);
    }

    else

    bRet = (Boolean)context.Cache[cacheKey];

    return bRet;

  4. In DynamicListBoxResourceHandler.cs again, REPLACE:

    Object handlerMap = System.Web.HttpContext.GetAppConfig(“system.web/httpHandlers”);

    WITH:

    Object handlerMap = System.Web.HttpContext.GetAppConfig(“httpHandlers”);

  5. Finally, in DynamicListBox.js, REPLACE:

    list.Tracker = DynamicListBox_FindControl( list.name + “:itemTracker” );

    WITH:

    list.Tracker = DynamicListBox_FindControl( list.name + “$itemTracker” );

You should be all set then.

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7 Responses to “Reviving Metabuilder’s DualList”

  1. Casper Says:
    May 10th, 2007 at 4:34 am

    Thanks, good work.

  2. Csgear Says:
    June 28th, 2007 at 9:32 am

    Great！Could you please send me a copy of working souce code?
    Thanks!

  3. Pansy Says:
    July 31st, 2007 at 5:40 am

    Hi you,
    I can’t download source and dll of DynamicListBox from Metabuilders.com . I don’t know what the problems the site has. Would you mind sending me its source? I’ll try your guide because I also need a dual list box control for .NET 2.0

  4. Nick H Says:
    August 14th, 2007 at 12:10 pm

    The change for DynamicListBox.js isn’t working for me. After doing some testing, it would appear my controls are named with a : not a $. With the $, I get a JS error (the find fails) – putting the : back in works fine.

    ?

  5. eniac Says:
    January 29th, 2008 at 3:34 pm

    this article is titled reviving the duallist yet the subject matter is in regards to the dynamic list.

  6. eniac Says:
    January 29th, 2008 at 6:06 pm

    oops the duallist relies on dynamiclist…my mistake

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