Dynamic Map in Silverlight Is Appearing Blank

Anonymous User

Original User: nelsl

My map through my simplified Silverlight app is appearing blank.  I have tried in IE 8 and firefox 3.6.15.  I have tried using Fiddler and found:
that my clientaccesspolicy.xml is being accessed under code 304. 
A successful 200 call to /ArcGIS/rest/services/[service name]/MapServer?f=json
Then the error 500 http://[server name]/ArcGIS/rest/services/[service name]/MapServer/export?bbox=-469791.006899998%2c-46560537.5957292%2c222507810.4336%2c83509729.9112292&size=780%2c455&format=png24&transparent=true&imageSR=26910&bboxSR=26910&f=image&

My log located at: C:\Program Files\ArcGIS\Server10.0\server\user\log
reports:
<Msg time='2011-03-10T13:57:12' type='WARNING' code='2008' target='[service name].MapServer' user='?' thread='3628' elapsed='59.99900'>A request to obtain a free ServerContext has failed because the Wait Timeout Interval has elapsed.</Msg>
<Msg time='2011-03-10T13:59:38' type='WARNING' code='2007' target='[service name].MapServer' machine='[server name]' thread='2692' elapsed='605.16800'>The context has been automatically released because the Context Usage Timeout Interval has elapsed.</Msg>

My Service is listed under: http://[service name]/ArcGIS/rest/services

My code is:

            <esri:Map x:Name="MyMap" >
            <esri:ArcGISDynamicMapServiceLayer ID="MyLayer"
                                               
                Url="http://[server name]/ArcGIS/rest/services/[service name]/MapServer" InitializationFailed="ArcGISDynamicMapServiceLayer_InitializationFailed" 
                                               Visible="True"/>
        </esri:Map>

which loads a blank page:

Url="http://serverapps.esri.com/ArcGIS/rest/services/California/MapServer" />

does load successfully.  The Initialization Failed Event does not fire.

I tried the analyze tool under the Map Service Publishing Toolbar and corrected all errors.
The service does show up correctly in ArcMap and the preview of the service in ArcGIS Server Manager.

Attached are my policies located under default: C:\Inetpub\wwwroot of the SOM/SOC machine.  My version of Visual Studio 2010 is running on a different box and is using IIS 6.

crosssdomain.txt.zip

clientaccesspolicy.txt.zip

WoodMonitoring.xlsx

species_records.xlsx

MarceloMarques_0-1748640648440.png

DavidEdlund_0-1748640009152.png

Anonymous User

Original User: jenniferdnery

Okay from what I understand, your application shows blank map but InitializationFailed event is not raised and you are able to access the service from any web browser so clientaccesspolicy is not the issue.

Can you go to the sub layers and do a query for "1=1", check if you have features for this service?

For example this: http://sampleserver4.arcgisonline.com/ArcGIS/rest/services/HomelandSecurity/Incident_Data_Extraction/MapServer/0/query?geometry=&geometryType=esriGeometryPoint&inSR=&spatialRel=esriSpatialRelIntersects&relationParam=&objectIds=&where=1%3D1&time=&returnIdsOnly=false&returnGeometry=true&maxAllowableOffset=&outSR=&outFields=&f=html

If you have features, you should see them on your map. If you don't see them, you can also subscribe to ArcGISDynamicMapService Initialized event and check the following:
InitializationFailure is null and IsInitialized is true, sub layer DefaultVisibility should also be true.

private void ArcGISDynamicMapServiceLayer_Initialized(object sender, EventArgs e)
{  
 ArcGISDynamicMapServiceLayer layer = sender as ArcGISDynamicMapServiceLayer;
 if(layer.InitializationFailure != null && !layer.IsInitialized) return;
 foreach(var l in layer.Layers)
  //TODO: check for l.DefaultVisibility
}

I found this and I'm not sure if it is the same error 500 Internal Server Error you got: http://gis.stackexchange.com/questions/6693/how-to-handle-500-internal-server-error-with-esri-silverlight-api

This is the simplest map with only the ArcGISDynamicMapServiceLayer and only the Map inside the Grid: http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#DynamicMap. I wonder if you have other control that could possibly be on the same grid as the map that placed the map behind it.