topic Re: Refreshing the layer on map, web app builder in ArcGIS Web AppBuilder Questions

Refreshing the layer on map, web app builder

akshayloya — Thu, 11 Jan 2018 14:12:59 GMT

Hi,

I have a web map with a accident layer added. I have created web app builder application with this web map.

I have following widgets:

1) Layer List

2) Situation Awareness

3) Near Me

4) Info Summary

I have a custom widget for date selection. There is a date field in my accident layer. I want to refresh this layer which is already added on map based on the date filter.

Hoping for the positive response.

Regards,

Akshay Loya

Re: Refreshing the layer on map, web app builder

RobertScheitlin__GISP — Thu, 11 Jan 2018 14:24:28 GMT

Akshay,

In the web map (on AGOL/Portal) set a refresh interval on your layer if the data is updated frequently.

Re: Refreshing the layer on map, web app builder

akshayloya — Thu, 11 Jan 2018 14:52:52 GMT

I want to refresh it based on where clause, this will change based on user selection.

Re: Refreshing the layer on map, web app builder

RobertScheitlin__GISP — Thu, 11 Jan 2018 14:54:53 GMT

Then in your custom widget just call

layer.refresh();

Re: Refreshing the layer on map, web app builder

akshayloya — Thu, 11 Jan 2018 14:56:34 GMT

but how to put where clause on the layer already added on web map and refresh it?

Re: Refreshing the layer on map, web app builder

RobertScheitlin__GISP — Thu, 11 Jan 2018 14:59:05 GMT

https://developers.arcgis.com/javascript/3/jsapi/featurelayer-amd.html#setdefinitionexpression

Re: Refreshing the layer on map, web app builder

akshayloya — Thu, 11 Jan 2018 15:40:43 GMT

This is the code I've written

var layers = this.map.getLayersVisibleAtScale(this.map.getScale());

array.forEach(layers, function (layer) {

if (layer.id == 'Spills_map_series_3947') {

layer.setDefinitionExpression("County='KING'");

layer.refresh();

}

});

But I'm getting an error as attached

Re: Refreshing the layer on map, web app builder

RobertScheitlin__GISP — Sun, 12 Dec 2021 02:14:05 GMT

Akshay,

Try this:

var layers = this.map.getLayersVisibleAtScale(this.map.getScale());
array.forEach(layers, function (layer) {
  if (layer.id == 'Spills_map_series_3947') {
    console.info(layer.className)
    layer.setDefinitionExpression("County='KING'");
  }
});‍‍‍‍‍‍‍

And show me what the console says

Re: Refreshing the layer on map, web app builder

akshayloya — Fri, 12 Jan 2018 05:05:58 GMT

It is giving undefined.

Sorry for the late response. Somehow Geonet service was down.

Re: Refreshing the layer on map, web app builder

akshayloya — Fri, 12 Jan 2018 05:59:30 GMT

My bad, I was trying it with map service. I changed it too feature service and it is working now.

Just need to apply for situation awareness widget now, somehow it doesn't take the filtered layer for query.