Latest Contributions by Jackson_CountyMissouri

‎06-22-2023

Thanks! But the correct solution was to use response.results[i].layer.title, not name.

‎06-22-2023

Thanks, but when I do that it just returns "[object Object]"

‎06-22-2023

I have a web map with multiple feature layers loaded in it. I need the user to click on a specific layer, though I can never be sure which other layers they may or may not have turned on. I need to extract some info from the one particular layer, but because it might not be the top layer I can't always be sure it's going to be the zeroth layer they clicked on. So I'm thinking if I could get the layer name(s) that were clicked on I could then get the index of the correct layer and extract my info from there. The problem is I can't find anything in the API for hitTest or FeatureLayer or anywhere else that tells me how I can get the layer name. var parcels = new FeatureLayer({ url: myURL1, title: "Parcels" }); var schools = new FeatureLayer({ url: myURL2, title: "School Districts" }); myMap.add(parcels); myMap.add(schools); myView.on("click", (event) => { myView.hitTest(event).then((response) => { // need something in here to grab layer name(s), but first get total # of layers var layerCount = response.results.length; for(var i = 0; i < layerCount; i++) { // how do I get the layer name(s) here? var layername = response.results[i].??????? } }); });

‎07-27-2022

Hello, I'm new-ish to experience builder and am coming up blank trying to figure out how to do something that might be pretty basic. I have a custom widget I'm trying to make to export the data from a feature layer in the map to a .csv file. But before I do that I'm first just trying to figure out how to access the layers in the map widget from my custom widget. I've looked over the EB docs and some examples but they aren't very useful. To start I have the code below. I have a pull-down which I want to get the layer names from the map widget. I don't want to have to hard-code the layer sources or anything because the layers in the map might change. import { React, AllWidgetProps, jsx } from 'jimu-core'; import { JimuMapViewComponent, JimuMapView } from 'jimu-arcgis'; import { IMConfig } from '../config'; function tableToCSV() { // will do something here } export default class Widget extends React.PureComponent<AllWidgetProps<IMConfig>, state> { constructor (props) { super(props) this.state = { value1: "test1", value2: "test2", value3: "test3" } } render () { return ( <br/> <div style={{ padding:10;margin:10;}}> <label for="toolSelect"><b>Select Layer to Download CSV:</b></label><br/> <select id="toolSelect" class="btn btn-primary dropdown-toggle"> <option>{this.state.value1}</option> <option>{this.state.value2}</option> <option>{this.state.value3}</option> </select> <br/> <br/> <br/> <button onClick={tableToCSV}>Download CSV</button> </div> ); } } I want to load the layer names where the value1: "test1" (and so on) lines are. How do I do that? Also, for my next step after that, if I want to convert the data in the layer table to a csv, will I need to load a Table widget into my map, or can I just use a feature layer?

‎07-27-2021

Still getting the "TypeError: highlightSelect.remove is not a function" error message. However, at least it's clearing the newest selected feature instead of the one I want to be selected (which is the previous selected feature), so maybe at least it's doing *something*

‎07-27-2021

^ I've already tried that. My feature is already selected before I even enter my function. If I try to just do ... if(highlightSelect) highlightSelect.remove(); ... it has no idea what highlightSelect is. So I have to define it beforehand ... somehow. I could try this: function unselectParcel() { myView.whenLayerView(myLayer).then(function(layerView) { myLayer.queryFeatures(query).then(function(result) { let query = myLayer.createQuery(); query.where = "MyFieldName = '" + myVariable + "'"; let highlightSelect; highlightSelect = myView.highlight(result.attributes["OBJECTID"]); if(highlightSelect) highlightSelect.remove(); }); }); } ... but of course that doesn't work because I'm passing in a query to myLayer.queryFeatures that isn't even declared or defined yet. So I next try this: function unselectParcel() { myView.whenLayerView(myLayer).then(function(layerView) { let query = myLayer.createQuery(); query.where = "MyFieldName = '" + myVariable + "'"; myLayer.queryFeatures(query).then(function(result) { let highlightSelect = result.features[0]; highlightSelect.remove(); }); }); } Which gives me the error message: "TypeError: highlightSelect.remove is not a function." Which is what I mentioned in my first post here.

‎07-27-2021

This is sort-of a follow-up to my thread here: https://community.esri.com/t5/arcgis-api-for-javascript-questions/querying-one-feature-layer-to-use-to-query-another/m-p/1076044#M73742 I'm now trying to do the opposite: I need to unselect/clear an already selected feature in a feature layer, using a query or anything else besides getting the Popup involved. I have looked through the 4.X API as well as some examples on this board, but can't find anything that works. In the API for FeatureLayerView.highlight there is a snippet that uses highlight.remove(), but every time I try to use it, my developer console tells me that the .remove() is not a function, which doesn't surprise me because there is no .remove function anywhere I can find in the API. I am trying to do something like this. FYI the myVariable variable is something I've already retrieved earlier that will represent the feature that's been highlighted. function unselectParcel() { var myQuery = myLayer.createQuery(); myQuery.where = "MyFieldName = '" + myVariable + "'"; myLayer.queryFeatures(myQuery).then(function(response) { myView.whenLayerView(myLayer).then(function(layerView) { var feature = response.features[0]; layerView.highlight.remove(feature.attributes["OBJECTID"]); }); }); } As I said, the .remove() does not work, and I've tried all kinds of different iterations of it, to no avail. I've also tried putting the queryFeatures inside of the whenLayerView and all kinds of other arrangements, but since my selecting-the-feature function works fine and all I want to do is the reverse of that, it seems like I should just be able to make a minor change to that selecting-the-feature code - right? I can't believe they have a "highlight" function but no "clear" or "un-highlight" function.

‎07-23-2021

Thanks, that works. Specifically I've got this: myView.on("click", (event) => { myView.hitTest(event).then((response) => { var result = response.results[0].graphic.attributes; var myVar = result.Thing; }); });

‎07-22-2021

I have a feature layer and I'm trying to grab an attribute from a feature the user clicked on. The standard way to do that would be to do something like: myView.popup.watch("selectedFeature", function() { if(myView.popup.selectedFeature != null) { var myVar = myView.popup.selectedFeature.attributes.Thing; } } The problem with doing that is that every time the popup pops up, it runs that code. For example, if you also have a search widget that searches for something and selects something in another layer, it thus has a popup, and then runs that code anyway simply because it has a popup. But of course since that search is dealing with a totally different layer, you don't want that code to be invoked. That is, it's running that listener for no reason at all. What I would like to do is something like this: myView.on("click", function () { var myVar = myView.selectedFeature.attributes.Thing; } This would let me deal with the selected feature totally independent of any popup. Unfortunately, as far as I can tell that's impossible because for some reason ESRI decided to make the selected feature an attribute of the popup instead of an attribute of the view or the feature layer (which would make a ton more sense, but I digress). Anybody have any ideas?

‎07-06-2021

Actually, I take that back. I need to strip out the city and zip from my search term! Unfortunately that creates other problems, since I want the city and zip i the search term.

‎07-06-2021

Absolutely that ptsQuery.where works correctly.

‎07-06-2021

Sorry, ADDPTKEY is PARCELNUM. I changed the name in the code here for clarity but forget to do so in the last post. I just fixed it here.

‎07-06-2021

Actually, I was testing that on the code you gave me. In my original code nothing comes up at all in that section. If I do ... addressPtsLayerSearch.queryFeatures(ptsQuery).then(function(response) { alert(response.features[0]); var feat = response.features[0].attributes; parcelnum = feat.PARCELNUM; }); alert("parcelnum is " + parcelnum); ... the parcelnum popup comes first (undefined) and then the popup with response.features[0] comes up second as undefined also.

‎07-06-2021

No. If I stick a popup in there with something like: alert(response.features[0]); I get "undefined" on the popup. If I do: alert(response.features[0].attributes["PARCELNUM"]); nothing comes up at all, not even a blank popup. Not sure what else to try (I like using popups for debugging).

‎07-06-2021

That didn't work. I even stuck an alert popup at various points in that code and it never even got invoked. I also tried: parcelnum = response.features[0].attributes.ADDPTKEY; per Blake's suggestion above to no avail.

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Date Last Visited	‎02-20-2024 10:28 AM

My Ideas

Latest Contributions by Jackson_CountyMissouri

Re: Get layer name from clicking on layer feature

Re: Get layer name from clicking on layer feature

Get layer name from clicking on layer feature

Get layer names and data/tables from map widget to load into custom widget

Re: Unselect/clear a feature from a feature layer using a query

Re: Unselect/clear a feature from a feature layer using a query

Unselect/clear a feature from a feature layer using a query

Re: Is there any way to grab attributes of a selected feature without using/listening to the popup?

Is there any way to grab attributes of a selected feature without using/listening to the popup?

Re: Querying one feature layer to use to query another layer (problem grabbing result of first layer)

Re: Querying one feature layer to use to query another layer (problem grabbing result of first layer)

Re: Querying one feature layer to use to query another layer (problem grabbing result of first layer)

Re: Querying one feature layer to use to query another layer (problem grabbing result of first layer)

Re: Querying one feature layer to use to query another layer (problem grabbing result of first layer)

Re: Querying one feature layer to use to query another layer (problem grabbing result of first layer)