Latest Contributions by Jun_ChengZhang

‎08-23-2018

Thank you very much, Helen. We are using JavaScript API, and a bit different from your case, but your approach point me to a very useful way to work with large selection set without limitation, I tried your way in JavaScript, it works, too. appreciate your response. I also find another way to work without using graphics and work around of Oracle limitation. My approach is using "OR" operation in where clause: whereClasue = “OID in (1, 2, 3, …999) or OID in (1000, 1001, 1002 … 1998) or OID in (1999, 2000, 2001 … 2997)” DynamicLayer.setLayerDefinitions([whereClasue,null, null, null, null]); this approach has an extra advantage, that is the map will sync with the legend. Juncheng Zhang

‎08-21-2018

Good morning everyone, I am trying to develop an application using ArcGIS JavaScript API, one of the function is draw a box on map and do the spatial query, then only the features inside or intersect with the box are display and all the rest feature should disappear. currently I use spatial query from box and get all the feature OIDs and then add definition query like, OBJECTID in (123, 124, 1245, .....2111) However since our map service point to Oracle database, oracle have limitation on number of values in the list, currently is 1000, so if there are more than 1000 values in the list, then definition query won't work, and the entire layer disappear. Can anyone point out other doable strategy to overcome such limitation in Oracle. I appreciate whoever replies. my current codes something like this: function SpatialQuery_Complete(event) { console.log("selection count: " + event.features.length); window.statusbar.visible = true; var productionSum = 0; var defQueryFld = "OBJECTID"; var definitionQueryWhere = defQueryFld + " IN ("; for(var i = 0; i < event.features.length; i++){ window.status= "Processing " + i + " of " + event.features.length; definitionQueryWhere = definitionQueryWhere + event.features.attributes.OBJECTID; if (i == (event.features.length - 1) ) definitionQueryWhere = definitionQueryWhere + ")"; else definitionQueryWhere = definitionQueryWhere + ","; } svcLayer.setLayerDefinitions([null, null,definitionQueryWhere, null, null]); //set layer definition svcLayer.setVisibleLayers([2, 5]); //turn on layer } Dave Zhang @GDOT

‎06-22-2017

Hi, I am developing a application using C# and ArcObjects 10.4.1 and need to query ArcGIS Server 10.4.1 map service layer. My service has a lot of layers, I am trying to query some of the layers in the map service. I am thinking to using code something like the following, but never get it to work. Can anyone point me to right direction? I appreaciate any input. see my current codes below. Thank you in advance. ESRI.ArcGIS.RuntimeManager.Bind(ESRI.ArcGIS.ProductCode.Server); restLayer = new MapServerRESTLayer(); restLayer.Connect("http://localhost/ArcGIS/rest/services/ARCWEBSVCMAP/MapServer/6"); //success in this point ESRI.ArcGIS.RuntimeManager.Bind(ESRI.ArcGIS.ProductCode.EngineOrDesktop); ILayer lyr = (ILayer)restLayer; compLayer = (ICompositeLayer)lyr; //ILayer lyr = compLayer.get_Layer(0); //errro restSBLayer = (IMapServerSublayer2)lyr; //error string rclink = "2312034000"; double measure = 0.02; ILayerDescription layerdesc = restSBLayer.LayerDescription; layerdesc.DefinitionExpression = "RCLINK = '" + rclink + "'"; IFIDSet selectedIDs = layerdesc.SelectionFeatures; int selectedID = -1; selectedIDs.Next(out selectedID); //IFeatureClass fcls = (IFeatureClass)fl;//.FeatureClass; //double[] results = getRouteMilePointXY(fcls, rclink, measure); //textBox1.Text = results.ToString();; textBox1.Text = "" + selectedID;

‎05-04-2017

Thank you Robert, that works! I appropriate your help. Jun Cheng

‎04-29-2017

Hi, I am trying to build a web page to display map and legend / some of my custom widgets that I planed. currently the map and custom widget show up ok, but I use border layout and try to put map in the left and leave a place in right panel and will put legend and my custom widget in it. But two content pane always on top of each other even though I specified region is "center" and "right". Can anyone point out for me what I did wrong here. I appreciate any of input. See the codes below. <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=7, IE=9, IE=10"> <meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no" /> <title>ArcGIS API Try out</title> <link rel="stylesheet" type="text/css" href="https://community.esri.com//js.arcgis.com/3.18/esri/css/esri.css" /> <link rel="stylesheet" type="text/css" href="css/Geocoder.css"> <link rel="stylesheet" type="text/css" href="css/IncidentSearch.css">  <style> html, body {width: 100%; height: 100%; margin: 0; overflow: hidden; } #mapDiv {padding: 0;} #rightPanel {border-left: solid 2px #ccc;} #borderContainer {width: 100%;height: 100%;} </style> <script type="text/javascript"> var package_path = window.location.pathname.substring(0, window.location.pathname.lastIndexOf('/')); var dojoConfig = { // The locationPath logic below may look confusing but all its doing is // enabling us to load the api from a CDN and load local modules from the correct location. packages: [{ name: "application", location: package_path + '/js' }] }; </script> <script src="https://js.arcgis.com/3.20/"></script> <script> dojo.require("dijit.dijit"); require(["dojo/parser", "dijit/layout/BorderContainer", "dijit/layout/ContentPane", "esri/map"], function (Parser, BorderContainer, ContentPane, Map) { var map = new Map("mapDiv", { basemap: "gray", center: [-87.65, 41.85], zoom: 12 }); }); </script>  </head> <body> <div data-dojo-type="dijit/layout/BorderContainer" data-dojo-props="design:'headline',gutters:false" id="borderContainer"> <div id="mapDiv" data-dojo-type="dijit/layout/ContentPane" data-dojo-props="splitter:true, region:'center'"></div> <div id="rightpanel" data-dojo-type="dijit/layout/ContentPane" data-dojo-props="splitter:true, region:'right'" style="width: 300px; background-color:lightgray"> <div id="IncidentSearchDiv"><p>This will put my own custom widgets and legend. How to make this entire content pane stay in the right side</p><br /> <br />How to get rid of the extra "Zoom in / Zoom out" text on the map </div> </div> </div> </body> </html>

‎11-21-2016

Thanks, Chris. That is the reason. Now it is working! Juncheng

‎11-21-2016

I have machine running ArcGIS server 10.2 and GeoEvent extension, I but the geoEvent service always stopped by itself after start for about 20 seconds, I don't know what is wrong here, I found the log file under install folder, and it does not help me that much. See attached log file, can anyone help? I appreciate any input for this post. Juncheng

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Latest Contributions by Jun_ChengZhang

Re: Display only selected features on map using java script

Display only selected features on map using java script

Query ArcGIS server map service layer in C#

Re: content pane misplaced in border layout

content pane misplaced in border layout

Re: GeoEvent service always stopped by itself after start for about 20 seconds

GeoEvent service always stopped by itself after start for about 20 seconds

Re: GeoEvent service always stopped by itself afte...

Re: Display only selected features on map using ja...