Hi,

I have a WinForms application that our data modellers are using to generate database diagrams.

These diagrams are being exported through Xml Serialization to a web server where they are being DeSerialized into a WebChart.FlowChart and a graphic is being displayed on a webpage.

My intention is to build this webpage as a data dictionary, with all elements on the chart (arrows, tables, possibly columns) all having drill through functionality, however am having a hell of a time locating the exact point or even creating an image map.

I have tried the ClientToDoc method as well as using HtmlBuilder to generate an image map.

I know (through debug) that the FlowChart I send to the constructor of HtmlBuilder has Tables and Arrows in it, however I always end up with an empty <MAP id="map1"></MAP> tag. Is there something I am not understanding correctly?

Basically, what is the best way to locate either an object or a point on a generated flowchart image when clicked on a webpage (we can assume that the flowchart object is in the Session memory).

Thanks
JC

Hi,

You could use server side image maps. Add an "ismap" attribute to the IMG tag, and put the IMG inside an A tag. Then the browser should append the mouse coordinates as a query string to the HREF URL when a user clicks on the image, and you can process the coordinates on the server. E.g.

<a href="imagemap.aspx"><img ... ismap="ismap">

will result in URL with query strings such as

http://yourserver/imagemap.aspx?33,44

On the server side call ClientToDoc to get the flowchart coordinates of the passed point, and call GetBoxAt to see if any box has been clicked.

I hope that helps,
Stoyan