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You will have to use te C# API at some point.<br>
The problem is that the map is loading by itself, and is outside the
control of your application.<br>
This means that it is difficult to detect when the map is ready.<br>
You want to know when the map is ready, because you cannot modify the
map before it is ready.<br>
The javascript code registers a "selection changed" handler, which is
installed when the map has loaded.<br>
A very simple way of activating your selection code would be to have a
hidden iframe, and reload it:<br>
(A better way would be to use an AJAX call, which has less overhead.)<br>
<tt><iframe style="display: none" src="" id="maploaded"
></iframe><br>
<script><br>
function OnMapLoaded()<br>
{<br>
document.getElementById('maploaded').src = 'maploaded.aspx';<br>
}<br>
</script></tt><br>
<br>
In the code below, insert "OnMapLoaded();" instead of the comment below
"InitDocument();"<br>
<br>
You can then do selection handling and whatever in the "maploaded.aspx"
page.<br>
Once done, the page should output a javascript like:<br>
<tt><script>parent.mapFrame.Refresh();</script></tt><br>
So the map display follows whatever modifications the C# code does.<br>
<br>
<pre class="moz-signature" cols="72">Regards, Kenneth, GEOGRAF A/S
</pre>
<br>
<br>
Nick Aizen skrev:
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<div class="Section1">
<p class="MsoNormal">Thanks, this is a big help, my question is about
the java
script code:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";"><!--
Javascript part --><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";"><script
type="text/javascript"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
var mapFrame = null; // A reference to the map frame<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
var originalMapFrameOnSelectionChanged = null // storage for the <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">original
onSelectionChanged function<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
function OnSelectionChanged() // when something is selected on the map<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
{<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
alert('Your handler works perfectly');<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
originalMapFrameOnSelectionChanged();<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
}<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
function InitDocument()<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
{<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
var win = document.getElementById('viewerFrame');<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
if (win.contentWindow) //FF returns the actual tag, IE returns <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">the
iframe<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
win = win.contentWindow;<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
mapFrameRef = win.GetMapFrame();<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
originalMapFrameOnSelectionChanged = <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">mapFrameRef.parent.OnSelectionChanged;<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
mapFrameRef.parent.OnSelectionChanged = <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">OnSelectionChanged;
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
} <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
function RetryInit()<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
{<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
if (mapFrame != null)<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
return;<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
try<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
{<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
InitDocument();<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
//At this point, you can post a "PageLoaded" via a form or AJAX<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
}<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
catch (e)<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
{<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
mapFrame = null;<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
}<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
if (originalMapFrameOnSelectionChanged == null)<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
{<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
mapFrame = null;<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
window.setTimeout("RetryInit();", 500);<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";">
}<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Courier New";"></script><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">What does it actually do? I know this is not a
java script
tutoral, was wondering how this intergrates with mapGuide. Could I just
call a
C# function so I may use the MG API to manipulate the map? <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Nick Aizen<o:p></o:p></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<pre wrap="">
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