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Trying to dynamically create hidden, query-...	c r b	Nov 03, 2009
Re: Trying to dynamically create hidden, qu...	c r b	Nov 03, 2009
Re: Trying to dynamically create hidden, qu...	Jamie Petersen	Nov 03, 2009
Re: Trying to dynamically create hidden, qu...	c r b	Nov 03, 2009

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Subject	Trying to dynamically create hidden, query-only map resource
Author	c r b
Date	Nov 03, 2009
Message	We're trying to programmatically create a dynamic MapResourceItem with the .NET ADF (v9.3.1) so that we can query a map service with an IQueryFunctionality, and then dispose of it when we're done. The MapResourceItem needs to have DisplaySettings of 'Visible=False' and 'displayInToc=False'. This history is long and sordid so I won't get into it here but suffice it to say this is an application requirement. We've gone through several combinations of MapResourceItem properties, methods of adding it to the map's ResourceManager, etc. but have not been able to get a working MapResourceItem with the appropriate functionalities. Has anyone had success with this? I've browsed some of the other forum postings but none have provided the silver bullet. Some already viewed: http://forums.esri.com/Thread.asp?c=158&f=2272&t=242909 http://forums.esri.com/Thread.asp?c=158&f=2276&t=214628 http://forums.esri.com/Thread.asp?c=158&f=2276&t=235252 The latest iteration of our code is below.
	GISResourceItemDefinition definition = new GISResourceItemDefinition(); definition.DataSourceDefinition = "http://gis5/arcgis/services"; definition.DataSourceType = "ArcGIS Server Internet"; definition.ResourceDefinition = "Layers@onestop/IaFmFacilities"; definition.DataSourceShared = true; definition.Identity = ""; DisplaySettings displaysettings = new DisplaySettings(); displaysettings.Visible = false; displaysettings.Transparency = 0; displaysettings.DisplayInTableOfContents = false; displaysettings.EnableDynamicTiling = false; ImageDescriptor imgDesc = new ImageDescriptor(); displaysettings.ImageDescriptor = imgDesc; MapResourceItem mapResourceItem = new MapResourceItem(); mapResourceItem.Name = "QueryEnvFacs"; mapResourceItem.Parent = MapResourceManager; mapResourceItem.DisplaySettings = displaysettings; mapResourceItem.Definition = definition; //MapResourceManager.ResourceItems.Insert(0, mapResourceItem); mapResourceItem.InitializeResource(); resource = MapResourceManager.CreateResource(mapResourceItem); return resource;

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Subject	Re: Trying to dynamically create hidden, query-only map resource
Author	c r b
Date	Nov 03, 2009
Message	A little more info on the nature of the errors: the various iterations result in one of the following: - a null resource - a resource with no functionalities - the MapResourceItem throws an init failure as soon as the definition is set (w/ 'mapResourceItem.Definition = definition') - the MapResourceManager throws an 'Object not set to an instance of an object' at either 'MapResourceManager.ResourceItems.Insert(0, mapResourceItem)' or 'MapResourceManager.CreateResource(mapResourceItem)' Note that I've also tried the code below (a variation on the original based on the post at http://forums.esri.com/Thread.asp?c=158&f=2276&t=214628) but no joy.
	MapResourceItem mapResourceItem = new MapResourceItem(); GISResourceItemDefinition definition = new GISResourceItemDefinition(); mapResourceItem.Name = "QueryEnvFacs"; definition.DataSourceDefinition = "http://gis5/arcgis/services"; definition.DataSourceType = "ArcGIS Server Internet"; definition.ResourceDefinition = "Layers@onestop/IaFmFacilities"; definition.DataSourceShared = true; mapResourceItem.Parent = MapResourceManager; mapResourceItem.Definition = definition; DisplaySettings displaySettings = new DisplaySettings(); displaySettings.DisplayInTableOfContents = false; displaySettings.Visible = false; mapResourceItem.DisplaySettings = displaySettings; MapResourceManager.ResourceItems.Add(mapResourceItem); //MapResourceManager.ResourceItems.Insert(0, mapResourceItem); resource = MapResourceManager.CreateResource(mapResourceItem);

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Subject	Re: Trying to dynamically create hidden, query-only map resource
Author	Jamie Petersen
Date	Nov 03, 2009
Message	If you add the hidden map resource at design time vs dynamic, does it initialize and work as you expect - or is it only an issue when dynamic? Is there an advantage to adding it on the fly vs startup? I don't know the answer to that question, but it would seem that if you aren't drawing the layer, that it wouldn't do any harm to be loaded initially. Regardless, below is vb code that I use to add a mapresourceitem on the fly. The bad news is that it looks similar to what you've already tried.
	Dim MapResourceItem = New ESRI.ArcGIS.ADF.Web.UI.WebControls.MapResourceItem() Dim gisResourceItemDefinition As ESRI.ArcGIS.ADF.Web.UI.WebControls.GISResourceItemDefinition = New ESRI.ArcGIS.ADF.Web.UI.WebControls.GISResourceItemDefinition() 'Dim resourceName As String = "TransparentBasemap" 'gisResourceItemDefinition.DataSourceShared = True gisResourceItemDefinition.DataSourceType = "ArcGIS Server Local" gisResourceItemDefinition.DataSourceDefinition = "gisapps-2" gisResourceItemDefinition.ResourceDefinition = "Layers@NewGISWEBSITE/BaseMap_Transparent" MapResourceItem.Definition = gisResourceItemDefinition MapResourceItem.Name = "TransparentBasemap" Dim displaySettings As ESRI.ArcGIS.ADF.Web.DisplaySettings = New ESRI.ArcGIS.ADF.Web.DisplaySettings() displaySettings.Transparency = 0 displaySettings.Visible = True displaySettings.ImageDescriptor.ReturnMimeData = True displaySettings.ImageDescriptor.ImageFormat = ESRI.ArcGIS.ADF.Web.ImageFormat.PNG8 displaySettings.ImageDescriptor.TransparentBackground = True Dim htmlColor As String = "#fffefefe" Dim myColor As Color = System.Drawing.ColorTranslator.FromHtml(htmlColor) displaySettings.ImageDescriptor.TransparentColor = myColor displaySettings.ImageDescriptor.ReturnMimeData = False displaySettings.DisplayInTableOfContents = False displaySettings.EnableDynamicTiling = True MapResourceItem.DisplaySettings = displaySettings MapResourceManager.ResourceItems.Insert(4, MapResourceItem) MapResourceManager.CreateResource(MapResourceItem) If MapResourceItem.FailedToInitialize Then Map1.CallbackResults.Add(New CallbackResult(Nothing, "javascript", New Object() {String.Format("alert('{0}')", MapResourceItem.InitializationFailure.Message)})) ScriptManager1.RegisterDataItem(Page, Map1.CallbackResults.ToString(), False) End If

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Subject	Re: Trying to dynamically create hidden, query-only map resource
Author	c r b
Date	Nov 03, 2009
Message	Hey Jamie, thanks for the quick response. Your question about why we didn't add the resource on startup into the aspx file is an excellent one (and part of the sordid details that I left out). Basically we had it on startup but it would sometimes not initialize properly or not get created at all -- and sometimes it would be fine. But it was completely unpredictable as to what state it would be in when the app started, which is why we opted to create it dynamically and have a little more control over it. As a follow-up, we figured this out: for some reason the code I included previously didn't work when we added the new resource to an existing MapResourceManager, but if we create a new MapResourceManager and add the new resource to it, it works fine. Hopefully we've got this one licked. Including final code snippet below (remember this is v9.3.1 so we removed some deprecated props, etc.)... Finally, just in case anyone ever finds this post and is looking for additional info, there's some related stuff in the AGS blog here ('Creating a utility library (Part II): Creating and adding resources'): http://blogs.esri.com/Dev/blogs/arcgisserver/archive/2008/02/22/Creating-a-utility-library-_2800_Part-II_29003A00_-Creating-and-adding-resources.aspx
	MapResourceManager mrm = new MapResourceManager(); mrm.ID = "QueryMRM"; MapResourceItem mapResourceItem = new MapResourceItem(); GISResourceItemDefinition definition = new GISResourceItemDefinition(); mapResourceItem.Name = "QueryEnvFacs2"; definition.DataSourceDefinition = "http://gis5/arcgis/services"; definition.DataSourceType = "ArcGIS Server Internet"; definition.ResourceDefinition = "Layers@onestop/IaFmFacilities"; mapResourceItem.Parent = mrm; mapResourceItem.Definition = definition; DisplaySettings displaySettings = new DisplaySettings(); displaySettings.DisplayInTableOfContents = false; displaySettings.Visible = false; mapResourceItem.DisplaySettings = displaySettings; mrm.ResourceItems.Insert(0, mapResourceItem); resource = mrm.CreateResource(mapResourceItem); mrm.Initialize(mapResourceItem);