Refresh of PictureMarkerSymbol source image issue.

MarkSmith — Tue, 04 Nov 2014 11:28:35 GMT

Hello,

I have a graphics refresh issue. I'm adding a PictureMarkerSymbol into a graphics layer which has a png image as its source url.

var theSymbol = new esri.symbol.PictureMarkerSymbol({

"url": "IMAGES/TestImage.png",

"height": 30,

"width": 30

});

var mapPoint = new esri.geometry.Point(350000, 900000, new esri.SpatialReference({ wkid: 27700 }))

var graphic = new esri.Graphic(mapPoint, theSymbol)

customGraphicsLayer.add(graphic);

This works fine, but the problem is the source image changes periodically, it's updated externally and I need the graphic icon on the map to update when the user clicks an update button (actually I've only added a button for testing, ultimately I'll automate it). However I can't get the API/browser to forget about the previous image. I've tried clearing the graphics, removing the graphics layer and adding it again, and adding a new PictureMarkerSymbol after I know the source png image has changed, but it seems that once the API/browser knows about the original image it assumes it hasn't changed and re-uses the original image from somewhere in its memory. Doing a full page refresh isn't really an option.

Can anyone suggest how I can make sure my PictureMarkerSymbol grabs the latest image, not what it thinks the image is?

Thank you.

Mark.

topic Refresh of PictureMarkerSymbol source image issue. in ArcGIS JavaScript Maps SDK Questions

Refresh of PictureMarkerSymbol source image issue.