topic Re: Add a feature in ArcGIS AppStudio Questions

Add a feature

GiatriLalla — Thu, 01 Nov 2018 18:22:21 GMT

Hi,

I am trying to add a feature as soon as an app is opened. I tried the code below but it is not working. The location is turning on however, the feature is not showing up. How can I fix this?

       Component.onCompleted: {

            //Qt.openUrlExternally("%1/home/webmap/viewer.html?webmap=%2".arg(app.portalUrl).arg(portalItem.id))

            if (!mapView.locationDisplay.started) {

                mapView.locationDisplay.start()

                mapView.locationDisplay.autoPanMode = Enums.LocationDisplayAutoPanModeRecenter

                    // create attributes json for the new feature

                    var featureAttributes = {"xxxx" : "xxxx"};

                    // create a new feature using the mouse's map point

                    var point = mapView.locationDisplay.mapLocation

                    var feature = featureTable.createFeatureWithAttributes(featureAttributes, point);

                    // add the new feature to the feature table

                    featureTable.addFeature(feature);

            } else {

                mapView.locationDisplay.stop()

Re: Add a feature

ErwinSoekianto — Thu, 01 Nov 2018 19:10:16 GMT

Giatri,

What is the error message you are getting? Does that block of code work if you were to run it with a click of a button for example?

This should work, this type of question requires further troubleshooting, I would recommend calling Esri Technical Support‌ to get help.

Erwin.

Re: Add a feature

GiatriLalla — Thu, 01 Nov 2018 19:16:36 GMT

Yes, the code runs if I had a Button to click. There is no error message. The point feature just don't show up while the location turns on like normal. That's why I can't figure out how to fix this.

Re: Add a feature

ErwinSoekianto — Thu, 01 Nov 2018 19:28:06 GMT

My guess is it might be a timing issue between the "Completed.onCompleted" being triggered and the location display is ready.

Can you check if we have the point before adding the feature to featureTable?

Re: Add a feature

GiatriLalla — Thu, 01 Nov 2018 19:47:51 GMT

No feature is being created, nothing is happening.

Re: Add a feature

nakulmanocha — Sun, 12 Dec 2021 10:30:35 GMT

Hi Giatri,

Please make sure the feature layer has been loaded (if adding it to the map) or initialized (if not the part of the view).

For e.g. here I am adding the feature as soon as the featurelayer loads. Also Make your point is not undefined. I hope this helps.

Nakul

 FeatureLayer {
                id: featureLayer


               

                // declare as child of feature layer, as featureTable is the default property
                ServiceFeatureTable {
                    id: featureTable
                    url: "http://sampleserver6.arcgisonline.com/arcgis/rest/services/DamageAssessment/FeatureServer/0"

                    // make sure edits are successfully applied to the service
                    onApplyEditsStatusChanged: {
                        if (applyEditsStatus === Enums.TaskStatusCompleted) {
                            console.log("successfully added feature");
                        }
                    }

                    // signal handler for the asynchronous addFeature method
                    onAddFeatureStatusChanged: {
                        if (addFeatureStatus === Enums.TaskStatusCompleted) {
                            // apply the edits to the service
                            featureTable.applyEdits();

                        }
                    }
                }
                onLoadStatusChanged: {
                   if(loadStatus === Enums.LoadStatusLoaded){
                        // var point = ArcGISRuntimeEnvironment.createObject("Point", {x: -11975850.0012, y: 4274812.4997999966, spatialReference: SpatialReference.createWebMercator()});
                       var point = mapView.locationDisplay.mapLocation
                       var featureAttributes = {"typdamage" : "Minor", "primcause" : "Earthquake"};
                       // create a new feature using the mouse's map point
                       var feature = featureTable.createFeatureWithAttributes(featureAttributes, point);

                       // add the new feature to the feature table
                       featureTable.addFeature(feature);
                   }
                }
            }
        }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍