[OpenLayers-Users] WMS layer redraw problem

[Eric Lemoine]

On Wednesday, May 12, 2010, Nathan Gerber <ngerber999 at gmail.com> wrote:
> I have found that the most reliable way to avoid browser caching when I want to force a redraw of a WMS layer is to do something like this:
> wms_layer.mergeNewParams({'timestamp':datetime});
>
> If you append the current timestamp to the layer each time you want to do a redraw it will have a unique address and thus bypass browser caching. If you do this you will not need to utilize the OpenLayers redraw function.

redraw(true) calls mergeNewParams but uses Math.random instead of datetime.


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Eric Lemoine

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