Feeds

Virtual Earth puts human face on data

Lightweight programming, minus Google

Maximizing your infrastructure through virtualization

The data set is returned to the method in the web service and, whilst this is happening, the text "Searching..." is displayed on the web page to provide feedback for the user.

If the transfer of data was successful, the function onSuccess is called.

    function onSuccess(result)
    {
        if (!layer)
        {
            layer = new VEShapeLayer();
            map.AddShapeLayer(layer);
            map.ShowAllShapeLayers();
        }
        
        layer.DeleteAllShapes();
        
        document.getElementById('SearchingText').innerHTML
            = 'Processing results...';
        
        for (var count=0; count < result.length; count++)
        {
            document.getElementById('SearchingText').innerHTML
                = 'Processing result ' + (count + 1)
                + ' of ' + result.length + '.';
            AddPoint(result[count].Name, result[count].Latitude,
                     result[count].Longitude);
        }

        document.getElementById('SearchingText').innerHTML
            = result.length + ' matches found.';
    }

The first five lines after the function name inquire if a layer is present: if there isn't, one is pulled in. Then any existing shapes superimposed upon the layer are erased.

Feedback ("Processing results...") for the web page user is provided again, and then a loop is entered that processes the returned data set row by row and adds a point for each location. Once each row has been processed, the number of matches found is displayed on the web page.

The mashup is now complete: data has been selected by the user, has been returned by the database and is displayed graphically on a Virtual Earth map.

The code needed to make this mashup work was easy to write using Visual Studio 2008. So are we trying to get you to use Visual Studio 2008? No. We don't care. The point isn't that it's any easier in any other code development tool of your choosing, but that it's easy to create mashups that provide useful interactive web-based tools.

If you are already writing web services, adding a mashup on top is trivial. Code for the web service ran to a mere 77 lines, not counting comments or lines containing a single bracket. (Although these are, of course, vital for the readability of code, they aren't exactly a taxing part of code writing and so they were ignored for the line count). The web page code was fractionally shorter at 75 lines, counted on the same basis.

So go on: create a mashup in your lunch break. You know it makes sense.®

Seven Steps to Software Security

More from The Register

next story
Whoah! How many Google Play apps want to read your texts?
Google's app permissions far too lax – security firm survey
Chrome browser has been DRAINING PC batteries for YEARS
Google is only now fixing ancient, energy-sapping bug
Do YOU work at Microsoft? Um. Are you SURE about that?
Nokia and marketing types first to get the bullet, says report
Microsoft takes on Chromebook with low-cost Windows laptops
Redmond's chief salesman: We're taking 'hard' decisions
EU dons gloves, pokes Google's deals with Android mobe makers
El Reg cops a squint at investigatory letters
Big Blue Apple: IBM to sell iPads, iPhones to enterprises
iOS/2 gear loaded with apps for big biz ... uh oh BlackBerry
OpenWRT gets native IPv6 slurping in major refresh
Also faster init and a new packages system
Google shows off new Chrome OS look
Athena springs full-grown from Chromium project's head
prev story

Whitepapers

Top three mobile application threats
Prevent sensitive data leakage over insecure channels or stolen mobile devices.
The Essential Guide to IT Transformation
ServiceNow discusses three IT transformations that can help CIO's automate IT services to transform IT and the enterprise.
Mobile application security vulnerability report
The alarming realities regarding the sheer number of applications vulnerable to attack, and the most common and easily addressable vulnerability errors.
How modern custom applications can spur business growth
Learn how to create, deploy and manage custom applications without consuming or expanding the need for scarce, expensive IT resources.
Consolidation: the foundation for IT and business transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.