topic Re: Use Selection From Select Widget in Web AppBuilder in Developers Questions

Use Selection From Select Widget in Web AppBuilder

GrantTaylor2 — Fri, 26 Jan 2018 20:33:37 GMT

Hi,

Is it possible, and if so how do I use a selection set I've made with the Select Widget with another custom developed widget?

Re: Use Selection From Select Widget in Web AppBuilder

GrantTaylor2 — Mon, 29 Jan 2018 12:32:53 GMT

I have the answer I was looking for. That will teach me to read the documentation properly in future ...

var count = 0;

array.forEach(this.map.itemInfo.itemData.operationalLayers, function (layer) {

var featureLayer = layer.layerObject;

count += featureLayer.getSelectedFeatures().length;

}, this);

Re: Use Selection From Select Widget in Web AppBuilder

fahadrasheed — Fri, 16 Oct 2020 05:07:48 GMT

Hi there i'm also facing this issue can you please elaborate the solution?
i'm looking to get OIDs of features selected through select widget.
any sort of help / pointers will be appreciated.

Re: Use Selection From Select Widget in Web AppBuilder

GrantTaylor2 — Sat, 11 Dec 2021 16:07:17 GMT

Hi Fahad,

Get the name of the Id field by calling the objectidField method on a featureLayer.

Then if you call the getSelectedFeatures on a featureLayer you will get an array of Graphic objects.

Use the objectidField name to get the Id of the feature (Graphic) from its attributes array.

var ids = [];
array.forEach(this.map.itemInfo.itemData.operationalLayers, function (layer) {
   var featureLayer = layer.layerObject;
      array.forEach(featureLayer.getSelectedFeatures(), function (feature) {
         ids.push(feature.attributes[featureLayer.objectIdField]);
      }, this);
}, this);

I think that is the gist of it. Apologies my javascript is a bit rusty.

These may help:

Select with Feature Layer | ArcGIS API for JavaScript 3.34

Graphic | API Reference | ArcGIS API for JavaScript 3.34

FeatureLayer | API Reference | ArcGIS API for JavaScript 3.34

Re: Use Selection From Select Widget in Web AppBuilder

fahadrasheed — Mon, 19 Oct 2020 05:32:17 GMT

Hi Grant,

Thank you for your kind reply. I have a simple widget in which a button in defined and on clicking the button i'm trying to define a function which will store OIDs of selected feature in a variable which i then pass on to some non esri webapps to preform some task.
I have tried to apply your code in the function i defined for my button but it throws back an error "Uncaught reference error: array is no defined", as i'm also new in javascript i have no idea what i'm doing wrong here. I'll attach the picture of code that i have and it'll a great help if can take a look and can point out what is wrong with this code that i'm trying out.

Re: Use Selection From Select Widget in Web AppBuilder

GrantTaylor2 — Sat, 11 Dec 2021 16:07:19 GMT

Hi Fahad,

You will need to add the array module to the define at the top of your code and also as a parameter to the function, see below.

define(['dojo/_base/declare',
        'jimu/BaseWidget',
        'dojo/_base/array',
        'esri/layers/FeatureLayer'
],
function(declare, BaseWidget, array) { ...‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

https://dojotoolkit.org/reference-guide/1.10/dojo/_base/array.html

Re: Use Selection From Select Widget in Web AppBuilder

fahadrasheed — Mon, 19 Oct 2020 08:14:15 GMT

Hi Grant,

Thanks again for your reply, I applied the changes as you guided in above comment but now it throw back a different sort of error "uncaught TypeError : array.forEach is not a function".
i read the dojo documentation about dojo/_base/array but i can not see what is wrong in this script. On removing array.forEach ids variable generate empty output.

Re: Use Selection From Select Widget in Web AppBuilder

GrantTaylor2 — Sat, 11 Dec 2021 16:07:22 GMT

Hi Fahad,

Try putting the items in the function definition in the same order as they are in the declare array.

define(['dojo/_base/declare',
        'jimu/BaseWidget',
        'dojo/_base/array',
        'dojo/dom',
        'esri/map',
        'esri/layers/layer',
        'esri/graphic'
],
function(declare, BaseWidget, array) { ...

Re: Use Selection From Select Widget in Web AppBuilder

fahadrasheed — Mon, 19 Oct 2020 08:49:18 GMT

Hi Grant,

Finally it worked Thanks a lot.

One more question, what if the featurelayer i'm using in my web app has multiple featureclasses i.e. some different sort of point features and some line features, how can i limit the return of OID to only the feature which i want not others which may also get selected due to they overlay on each other.

Thank you Again.

Re: Use Selection From Select Widget in Web AppBuilder

GrantTaylor2 — Sat, 11 Dec 2021 16:07:24 GMT

Hello Fahad,

You could try something like this...

var featureLayer = layer.layerObject;
if(featureLayer.geometryType === 'polyline') {
    ...
}

FeatureLayer | ArcGIS API for JavaScript 4.17