GIS on Marko Apfel

F#, ArcGIS Runtime and error “Cannot create unknown type '{http://schemas.esri.com/arcgis/runtime/2013}MapView'”

Tue, 14 Jul 2015 17:15:00 +0200

By playing with F# and ArcGIS Runtime I tried to re-create a sample C# project with F#.

For the WPF part I used the Visual Studio extension F# Empty Windows App (WPF) and F# Windows App (WPF, MVVM) the NuGet packages FSharp.ViewModule.Core and FsXaml for WPF.

Visual Studio – Getting compilation error “The type 'XAML' is not defined.”

Thu, 09 Jul 2015 06:34:00 +0200

During compilation of the F# Empty Windows App (WPF) I got that error (check the output pane carefully).

image

To solve this issue you have to thrust of the XAML Type Provider of this project. This you can do via the Visual Studio options:

Showing own KML files in Google Maps via assistance of Dropbox

Tue, 04 Jun 2013 06:16:00 +0200

Workflow

Create KML file
Save it to your public Dropbox folder
Copy the public link

image
Paste this link in the search field of Google Maps

image

Result

Enjoy your KML data in Google Maps

LINQ and ArcObjects

Wed, 12 Sep 2012 15:20:00 +0200

Motivation

LINQ (language integrated query) is a component of the Microsoft. NET Framework since version 3.5. It allows a SQL-like query to various data sources such as SQL, XML etc.

Like SQL also LINQ to SQL provides a declarative notation of problem solving – i.e. you don’t need describe in detail how a task could be solved, you describe what to be solved at all. This frees the developer from error-prone iterator constructs.

Interop effects by resolving and instantiating types with ArcObjects

Fri, 25 Nov 2011 14:10:00 +0100

Problem

this code does not work

Type t = typeof(ESRI.ArcGIS.Framework.AppRefClass);
System.Object obj = Activator.CreateInstance(t);

but yet this code

Type t = Type.GetTypeFromCLSID(typeof(ESRI.ArcGIS.Framework.AppRefClass).GUID);
System.Object obj = Activator.CreateInstance(t);

Reason

In the first variant the runtime tries to cast to AppRefClass. This is not possible.

And in the second one, the runtime does not knows anything about AppRefClass. So it leave it as IUnknown.

Ressourcen für Esri 2011 Präsentationen und Code-Beispiele

Tue, 31 May 2011 15:56:00 +0200

Aufgrund mehrfacher Nachfrage, hier nochmal zusammengefasst die Links zu Präsentationen und Code-Beispielen von Vorträgen und Workshop mit meinem Mitwirken:

Die Sourcen finden sich unter:

Umfrage-Auswertung zum Workshop “Professionelle Softwareentwicklung mit ArcObjects” auf der ESRI 2011

Fri, 27 May 2011 04:04:00 +0200

Als erstes möchten Jochen und ich uns bei euch Teilnehmern bedanken für das große positive Feedback zu diesem Workshop. Das waren sicher für uns alle 3 sehr spannende Stunden – für euch im technischen Inhalt und für uns in der Frage euren Geschmack zu treffen. Ein derartiger Workshop war eine Premiere für Esri im Rahmen der GIS Konferenz - und eure Einwertung kann man durchaus als einen Arbeitsauftrag an uns auffassen diesbzgl am Ball zu bleiben.

Suppressing Add-in-registration task during build process

Mon, 16 May 2011 07:17:00 +0200

If you develop ArcGIS Add-ins with Visual Studio under limited permissions you get during the build process an error, that the stuff could not be registered.

Normally its enough to run one times this build as an admin. Then all needed information are set and also taken for users with limited access.

Calling esriRegasm manually (outside an ArcGIS-installation)

Tue, 26 Apr 2011 20:53:00 +0200

Since ArcGIS 10 during the Visual Studio build an additional target with the execution of a program named esriRegasm is called. Amongst other things this program adds the COM-categories in the registry.

Experiences with the new Add-In concept of ArcGIS 10

Wed, 08 Sep 2010 12:08:00 +0200

Namespaces of components in an Add-In

It seems that there is only one namespace for all components in an Add-In allowed. The namespace is defined over an attribute of the tag <AddIn>. And this tag is allowed only once per config.esriaddinx file.

Set ApartmentState for ArcObjects-logic in separate threads

Wed, 08 Sep 2010 10:54:00 +0200

Problem context

We use a backgroundworker to load .MXD documents from several places of the system and extract meta data and thumbnails which a GUI component shows in an asynchronous way.

The unit tests for this logic throws an exception during the access the thumbnail:

Caching of toolbar names in ArcMap

Tue, 08 Jun 2010 10:06:00 +0200

For little GUI-changes in own ArcMap-customizations normally it is enough to start the application and look that every entry is visible. Especially for refactoring of an own toolbar it was still enough to verify that the toolbar is already shown in the choice-list.

F# and ArcObjects, Part 3

Fri, 26 Mar 2010 13:15:00 +0100

Today i played a little bit with IFeature-sequences and piping data. The result was a calculator of the bounding box around all features in a feature class.

Maybe a little bit dirty, but for learning was it OK. ;-)

F# and ArcObjects, Part 2

Thu, 25 Mar 2010 14:49:00 +0100

After accessing one feature now i iterate through all features of a feature class:

open System;;

#I "C:\Program Files\ArcGIS\DotNet";;
#r "ESRI.ArcGIS.System.dll";;
#r "ESRI.ArcGIS.DataSourcesGDB.dll";;
#r "ESRI.ArcGIS.Geodatabase.dll";;
open ESRI.ArcGIS.esriSystem;;
open ESRI.ArcGIS.DataSourcesGDB;;
open ESRI.ArcGIS.Geodatabase;;

let aoInitialize = new AoInitializeClass();;

let status = aoInitialize.Initialize(esriLicenseProductCode.esriLicenseProductCodeArcEditor);;

let workspacefactory = new SdeWorkspaceFactoryClass();;

let connection = "SERVER=okul;DATABASE=p;VERSION=sde.default;INSTANCE=sde:sqlserver:okul;USER=s;PASSWORD=g";;

let workspace = workspacefactory.OpenFromString(connection, 0);;

let featureWorkspace = (box workspace) :?> IFeatureWorkspace;;

let featureClass = featureWorkspace.OpenFeatureClass("Praxair.SFG.BP_L_ROHR");;

let queryFilter = new QueryFilterClass();;

let featureCursor = featureClass.Search(queryFilter, true);;

let featureCursorSeq (featureCursor : IFeatureCursor) = 
 let actualFeature = ref (featureCursor.NextFeature())
 seq {
 while (!actualFeature) <> null do
 yield actualFeature
 do actualFeature := featureCursor.NextFeature()
 };;


featureCursorSeq featureCursor
 |> Seq.iter (fun feature -> Console.WriteLine ((!feature).OID));;

F# and ArcObjects, Part 1

Thu, 25 Mar 2010 10:58:00 +0100

After having a first look on F# its time to ask: How could i use F# with ArcObjects.

So my first steps was to do something with a feature in a F# interactive session. And these are my first code lines: