How to load FeatureLayer from offline geodatabase after generating it from feature service?

Question

I took one of the Feature Editing samples, and changed it so it's purely offline because for my use the user will never be editing the server directly. In the morning they will generate a new geodatabase while connected to our internal wifi, then go into the field and make edits, and then sync edits back at the office while connected to our internal wifi. The problem I'm having is that after the geodatabase is generated, the Feature Layer is not added to the map! If I close the app and reopen it, then the layer is visible, but the replica is no longer attached for syncing. How can I get the Feature Layers to load AFTER the geodatabase is generated? Thanks // Copyright 2015 ESRI // All rights reserved under the copyright laws of the United States // and applicable international laws, treaties, and conventions. // You may freely redistribute and use this sample code, with or // without modification, provided you include the original copyright // notice and use restrictions. // See the Sample code usage restrictions document for further information. import QtQuick 2.3 import QtQuick.Controls 1.2 import QtQuick.Controls.Styles 1.2 import ArcGIS.Runtime 10.26 import ArcGIS.Extras 1.0 import QtPositioning 5.7 ApplicationWindow { id: appWindow width: 800 height: 600 title: "Tree Trimming" property real scaleFactor: System.displayScaleFactor property int fontSize: 15 * scaleFactor property string featuresUrl: "my/feature/service" property string gdbPath: "~/ArcGIS/Runtime/Data/Test/offlineSample.geodatabase" property var selectedFeatureId: null Envelope { id: initialExtent spatialReference: map.spatialReference xMin: -13821343.454522012 yMin: 5631086.281941083 xMax: -13732523.627654603 yMax: 5754761.393706545 } Map { id: map anchors.fill: parent focus: true extent: initialExtent ArcGISTiledMapServiceLayer { url: "http://services.arcgisonline.com/ArcGIS/rest/services/Canvas/World_Light_Gray_Base/MapServer" } FeatureLayer { id: offlineLayer featureTable: local selectionColor: "cyan" function hitTestFeatures(x, y) { var tolerance = Qt.platform.os === "ios" || Qt.platform.os === "android" ? 4 : 1 var featureIds = offlineLayer.findFeatures( x, y, tolerance * scaleFactor, 1) if (featureIds.length > 0) { selectedFeatureId = featureIds[0] selectFeature(selectedFeatureId) statusText.text = "Tap anywhere to move the feature" } } } onMouseClicked: { if (offlineLayer.isFeatureSelected(selectedFeatureId)) { var featureToEdit = offlineLayer.featureTable.feature( selectedFeatureId) featureToEdit.geometry = mouse.mapPoint offlineLayer.featureTable.updateFeature(selectedFeatureId, featureToEdit) offlineLayer.unselectFeature(selectedFeatureId) selectedFeatureId = null syncButton.enabled = true statusText.text = "Tap on Sync to update the Feature Service with the edits" } else offlineLayer.hitTestFeatures(mouse.x, mouse.y) } } GeodatabaseFeatureTable { id: local geodatabase: gdb.valid ? gdb : null featureServiceLayerId: 2 } ServiceInfoTask { id: serviceInfoTask url: featuresUrl onFeatureServiceInfoStatusChanged: { if (featureServiceInfoStatus === Enums.FeatureServiceInfoStatusCompleted) { //statusText.text = "Service info received. Tap on the Generate Geodatabase Button" statusText.text = gdb.valid generateButton.enabled = true } else if (featureServiceInfoStatus === Enums.FeatureServiceInfoStatusErrored) { statusText.text = "Error:" + errorString generateButton.enabled = false cancelButton.text = "Start Over" } } } SyncGeodatabaseParameters { id: syncGeodatabaseParameters syncDirection: Enums.SyncDirectionBidirectional } Feature { id: featureToEdit } Rectangle { anchors { fill: controlsColumn margins: -10 * scaleFactor } color: "lightgrey" radius: 5 * scaleFactor border.color: "black" opacity: 0.77 MouseArea { anchors.fill: parent onClicked: (mouse.accepted = true) } } Column { id: controlsColumn anchors { left: parent.left top: parent.top margins: 20 * scaleFactor } spacing: 7 Button { id: generateButton text: "Generate Geodatabase" enabled: false style: ButtonStyle { label: Text { text: control.text color: control.enabled ? "black" : "grey" horizontalAlignment: Text.AlignHCenter } } onClicked: { generateGeodatabaseParameters.initialize( serviceInfoTask.featureServiceInfo) generateGeodatabaseParameters.extent = map.extent generateGeodatabaseParameters.returnAttachments = false statusText.text = "Starting generate geodatabase task" geodatabaseSyncTask.generateGeodatabase( generateGeodatabaseParameters, gdbPath) } } Button { id: syncButton text: "Sync" width: generateButton.width enabled: false style: generateButton.style onClicked: { enabled = false geodatabaseSyncTask.syncGeodatabase(syncGeodatabaseParameters, gdb) statusText.text = "Starting sync task" } } Button { id: cancelButton text: "Cancel" width: generateButton.width enabled: false style: generateButton.style onClicked: { geodatabaseSyncTask.cancelJob(syncStatusInfo) enabled = false text = "Cancel" } } } Geodatabase { id: gdb path: gdbPath } GeodatabaseSyncStatusInfo { id: syncStatusInfo } GeodatabaseSyncTask { id: geodatabaseSyncTask url: featuresUrl onGenerateStatusChanged: { if (generateStatus === Enums.GenerateStatusCompleted) { statusText.text = geodatabasePath cancelButton.enabled = false generateButton.enabled = false statusText.text = "Select a feature" } else if (generateStatus === GeodatabaseSyncTask.GenerateError) { statusText.text = "Error: " + generateGeodatabaseError.message + " Code= " + generateGeodatabaseError.code.toString( ) + " " + generateGeodatabaseError.details generateButton.enabled = false cancelButton.text = "Start Over" } } onGeodatabaseSyncStatusInfoChanged: { if (geodatabaseSyncStatusInfo.status === Enums.GeodatabaseStatusUploadingDelta) { var deltaProgress = geodatabaseSyncStatusInfo.deltaUploadProgress / 1000 var deltaSize = geodatabaseSyncStatusInfo.deltaSize / 1000 statusText.text = geodatabaseSyncStatusInfo.statusString + " " + String( deltaProgress) + " of " + String( deltaSize) + " KBs..." } else statusText.text = geodatabaseSyncStatusInfo.statusString + "..." if (geodatabaseSyncStatusInfo.status !== GeodatabaseSyncStatusInfo.Cancelled) cancelButton.enabled = true syncStatusInfo.json = geodatabaseSyncStatusInfo.json } onSyncStatusChanged: { if (syncStatus === Enums.SyncStatusCompleted) { cancelButton.enabled = false syncButton.enabled = false statusText.text = "Sync completed. You may continue editing the features." } if (syncStatus === Enums.SyncStatusErrored) statusText.text = "Error: " + syncGeodatabaseError.message + " Code= " + syncGeodatabaseError.code.toString( ) + " " + syncGeodatabaseError.details } } GenerateGeodatabaseParameters { id: generateGeodatabaseParameters } Rectangle { id: textStatusRectangle anchors { fill: statusText margins: -10 * scaleFactor } visible: statusText.text.length > 0 color: "lightgrey" radius: 5 border.color: "black" opacity: 0.77 } Text { id: statusText anchors { left: parent.left right: parent.right bottom: parent.bottom margins: 20 * scaleFactor } wrapMode: Text.WordWrap color: "black" } Rectangle { anchors.fill: parent color: "transparent" border { width: 0.5 * scaleFactor color: "black" } } Component.onCompleted: { statusText.text = "Getting service info" serviceInfoTask.fetchFeatureServiceInfo() } }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

LucasDanzinger · Answer

The local geodatabase editing sample switches over to use the local geodatabase. It uses a ternary operator to determine if it is online or offline, and if offline, it uses the local geodatabase feature table. This all happens through property binding. If you want to be explicit in your code, you could instead dynamically create a new FeatureLayer when the generateStatusChanged signal emits, using syntax like this: var fl = ArcGISRuntime.createObject("FeatureLayer"); fl.featureTable = local;‍‍

DotMatrix · Answer

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