Identify Task issues

I forwarded your question to the REST API team. You can post to their forum too http://forums.arcgis.com/forums/11-ArcGIS-Server-REST-API or go through support http://support.esri.com/en/

Hi,

I get the same results in the browser.

Could someonone ate ESRI replicate the situation (i.e. index != id and max id > layer count) at confirm this as a bug (or not).

Many thanks,

Matt

Oh, if ID=5 returns the correct layer, then I really don't know what could be wrong with ID=6.

Have you tried using the same parameters on your web browser? Same error? If yes, I can only suspect that there's something wrong with that layer.

Jennifer thanks again for your time,

You need to fix your service and have every ID match their index.

This would suggest an issue in the implementation. Has this be raised as a 'bug'?

I was told that top:5 may actually be accessing ID=6, that's why it worked and top:6 is trying to access ID=7, which is already out of bound... as caused by the broken layer (ID=1).

I'm not sure this is true. I have tried id 0 and id 5. They both return features from the correct layer (id/name).

ID=1 may be missing because it was not published but is still contained in your ArcMap Table of Contents. You can either delete layer with ID=1 from ToC or include it and re-publish.

I will talk to the map admin, alternatively I may have to return features from all layers and sort them on the client - not ideal.

Regards,

Matt

Here's what I've gathered -

You need to fix your service and have every ID match their index.

I was told that top:5 may actually be accessing ID=6, that's why it worked and top:6 is trying to access ID=7, which is already out of bound... as caused by the broken layer (ID=1).

ID=1 may be missing because it was not published but is still contained in your ArcMap Table of Contents. You can either delete layer with ID=1 from ToC or include it and re-publish.

LayerOption, by default is Top. You can specify this in the IdentifyParameters http://help.arcgis.com/en/webapi/silverlight/apiref/ESRI.ArcGIS.Client~ESRI.ArcGIS.Client.Tasks.IdentifyParameters~LayerOption.html

I have to check with the ArcGIS Server team about the Index out of bounds error. I'll get back with you on that.

from fiddler:

tolerance 2
returnGeometry true
mapExtent 3219613.08846863,1726402.76275839,3226995.61041765,1732899.38207353
layers top:6
imageDisplay 1175,825,96
geometryType esriGeometryPolygon
geometry {"spatialReference":{"wkid":2232},"rings":[[[3219613.08846863,1732899.38207353],[3226995.61041765,1732899.38207353],[3226995.61041765,1726402.76275839],[3219613.08846863,1726402.76275839],[3219613.08846863,1732899.38207353]]]}
f json

One thing I notice is that it says "top:6", I didn't specify Top.

I have now tested the webservice direct with All:6 and Top:6 and in both cases get:

Server Error - Index was outside the bounds of the array.

Code: 500

Is it really using Ids and not Index or is it doing a bit of both????

Matt

Hi,

the exception I posted orginally was fromn the failed event handler and is as much information as I can see at that point.

From fiddler I can see the server response is:

Server Error - Index was outside the bounds of the array

This is the service:

This is me calling it (note the watch value is 6):

I'm trying to callit direct at the moment.

Matt

servicelayers.JPG

layer 6.JPG

You can place a breakpoint in the Failed event handler, if it does go there.

Post #14 in this thread might guide you in finding what you need to look for in Fiddler: http://forums.arcgis.com/threads/14730-Area-And-Perimeter

Jennifer thanks for your response.

Yes I expect 7 to fail.

The exception is of type "System.Net.WebException" so I don't think your code snippet helps.

I'm looking into fiddler and calling the service, not something I've done before.

Matt

Subscribe to Failed event and check for exception. Also, you might want to run Fiddler with your application to see more information on which web request failed.

 
void QueryTask_Failed(object sender, TaskFailedEventArgs e)
{
 if (e.Error is ServiceException)
 {
  StringBuilder sb = new StringBuilder();
  foreach(string detail in (e.Error as ServiceException).Details)
   sb.Append(string.Format("{0}\n", detail));
  MessageBox.Show(string.Format("Error: {0}", sb.ToString()));
 }
}

If the layer ID is up to 6, ID=7 is expected to fail, right?

Try to see if putting the same parameters from the web browser will result to the same error.

Hi,

I have a similar issue to the first poster (my last layer fails) however my layer is on by default and I get this exception from ESRI.ArcGIS.Client.Tasks.TaskFailedEventArgs:

Error {System.Net.WebException: The remote server returned an error: NotFound. ---> System.Net.WebException: The remote server returned an error: NotFound.
   at System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)
   at System.Net.Browser.BrowserHttpWebRequest.<>c__DisplayClass5.<EndGetResponse>b__4(Object sendState)
   at System.Net.Browser.AsyncHelper.<>c__DisplayClass2.<BeginOnUI>b__0(Object sendState)
   --- End of inner exception stack trace ---
   at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state)
   at System.Net.Browser.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
   at System.Net.WebClient.GetWebResponse(WebRequest request, IAsyncResult result)
   at System.Net.WebClient.DownloadBitsResponseCallback(IAsyncResult result)} System.Exception {System.Net.WebException}

My service has layer ids 0,2,3,4,5,6 (note no number one - and none of them are group layers). All work except 6. I have tried calling the Identify task with and without layer options but I still get the exception.

If I pass in Id "5" the results come back for a layer with the correct name - excellent.
If I pass in Id "1" I don't get an exception, but I also get no results.
If I pass in Id "7" I get the same exception as before.

Any Ideas?

Thanks, Matt

Again, I highly recommend the Silverlight Table of Contents code example in the code gallery. Here's a link to it:

http://www.arcgis.com/home/item.html?id=acad4f3fb7d04854ab8dbe3fc5f79fc5

SanjayRajput

Hello Mark Cederholm/Others
I am looking for the code snippet to find the current visible layers of a given dynamicmapservice.
During application startup, dynamicmapservice loads all visible layers on the map(defined in the mxd). But after a while users can TURNON/TURNOFF layers. And when I do the QUERYTASK, I should be able to QUERY only current visible layers.
Thanks
Sanjay

The only method I've found is to keep track of which layers are visible at a given "scale" (ESRI deprecates that term nowadays) and provide those IDs with the "all" option each time I make an identify request. It takes a bit of logic to sort through the layers, I'm afraid.

Check out the table of contents at the silverlight code gallery for an example of maintaining visibility info. You can use REST calls to grab the min and max scales for each layer, but that's pretty chatty. To keep things simpler, what I ended up doing was create a WCF service to get all the layer info with one SOAP call: if you add a web reference to the map service in your ASP project it automatically builds the methods and data structures for you.

The only method I've found is to keep track of which layers are visible at a given "scale" (ESRI deprecates that term nowadays) and provide those IDs with the "all" option each time I make an identify request. It takes a bit of logic to sort through the layers, I'm afraid.

Check out the table of contents at the silverlight code gallery for an example of maintaining visibility info. You can use REST calls to grab the min and max scales for each layer, but that's pretty chatty. To keep things simpler, what I ended up doing was create a WCF service to get all the layer info with one SOAP call: if you add a web reference to the map service in your ASP project it automatically builds the methods and data structures for you.

For your first question:
identifyParams.LayerOption = LayerOption.visible;
For your second question:
identifyParams.LayerIds.AddRange(new int[] {1,5,17,18});

DavidAshton

With the help of Morton answering Mark question I was able to somewhat answer mine. Now I�??m hoping maybe Mark, Morton, Ernesto or some other kind sole will be able to help me Solve the final parts of my problem.

I took what Morton told Mark and add this to my code, it seems like it now only identifies the layers 1,5,14,17, and 18. But it doesn�??t respect the fact if they are visible. If I set LayerOption = LayerOption.visible it only works for the layers visible at start up and doesn't respect the identifyParams.LayerIds.Add statements.

Two questions:
Is there a way to have the identify tool respect the sublayer list visible layers?

Like Ernesto pointed out how do I just write identifyParams.LayerIds.Add(1,5,17,18) or identifyParams.LayerIds.Add[1,5,17,18], both give errors in VS; I don�??t want to keep listing identifyParams.LayerIds.Add() over and over.


ESRI.ArcGIS.Client.Tasks.IdentifyParameters identifyParams = new IdentifyParameters

            
            {
                
                Geometry = clickPoint,
                MapExtent = Map.Extent,
                Width = (int)Map.ActualWidth,
                Height = (int)Map.ActualHeight,
                LayerOption = LayerOption.all,
            
                

            };
            //these identifyParams.LayerIds.Add do nothing if LayerOption is set to visible
           //these identifyParams.LayerIds.Add work if LayerOption is set to all but doesn't respect if the layers are turned on/off

            identifyParams.LayerIds.Add(1);
            identifyParams.LayerIds.Add(5);
            identifyParams.LayerIds.Add(14);
            identifyParams.LayerIds.Add(17);
            identifyParams.LayerIds.Add(18);


            // identifyParams.LayerIds = [2, 5];  This errors out not sure how to list a list

That did the trick. Thanks!

SomeGISGuy

The property is read only, but the collection is not.
Ie: identifyParams.LayerIDs.Add(1);