Map Extent to New Feature

Permanently deleted user

17. September 2015 10:10

Hi,

This seems like it should be easy. I need to capture the current extent of the map and add that polygon to a feature class. I start with GetMapExtent, but don't know how to convert the resulting envelope to a feature.geometry so I can use the AddFeatures to a feature layer.

Any help would be apprecieted (I'm keeping my fingers crossed for a simple answer..).

Brad

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  Nico Burgerhart

  17. September 2015 19:15

  Cast the extent envelope to a geometry object

  Create a new graphic object

  Assign the geometry to the .Geometry property of the graphic

  Create a new collection

  Add the graphic to it

  Use the collection in the Add Features activity

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  Permanently deleted user

  18. September 2015 03:47

  Thanks Nico,

  It's the Cast activity i was missing. I have added it in, but i'm still getting errors at the AddFeatures stage, and I think it's still to do with the geometry not being applied (I can setup the workflow for the user to select the geometry and it works fine). I have a NewGeom variable (ESRI.ArcGIS.Client.Geometry.Geometry) and NewEnv (ESRI.ArcGIS.Client.Geometry.Envelope). How exactly do I use Cast to transfer the capture extent?

  Thanks again.

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  Nico Burgerhart

  18. September 2015 04:01

   

  When you place a Cast activity on the canvas, you have to enter a data type. Select here ESRI.ArcGIS.Client.Geometry.Geometry

  A way to show the contents of your graphic is placing the following expression in an alert of prompt:

   

  New FeatureSet(New List(Of Graphic) From {myGraphicVariable}).ToJson().

  With some reformatting of the JSON you can use this in the Add Features operation on the ArcGIS Server REST endpoint

  http://resources.arcgis.com/en/help/arcgis-rest-api/index.html#//02r30000010m000000

  Warning: use of an alert/prompt (client) activity can introduce an error on the Add Features activity, this is related to serialization issues.

   

   

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  Permanently deleted user

  18. September 2015 04:49

  ps.  I'm using Geocortex version 4.1.5 with a Silverlight 2.2 viewer.

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  Nico Burgerhart

  20. September 2015 03:39

  Which error do you get on the Add Features?

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