Invoke Method: add field throws error for String field, works for Integer

Permanently deleted user

July 11, 2016 05:32

I'm adding a field to a featureset using the Invoke Method. When the field is an integer it works fine. When the field is a string it doesn't work and throws the following, even though the TargetObject isn't null:

 

   Unhandled exception: 'Value cannot be null.

 

   Parameter name: TargetObject' in activity '1.278: InvokeMethod'.

 

   Value cannot be null.

 

   Parameter name: TargetObject

 

The field that works:

 

New ESRI.ArcGIS.Client.Field("LocationID", ESRI.ArcGIS.Client.Field.FieldType.Integer, "Location ID", Nothing, False, True, 10)

 

The field that doesn't work:

 

New ESRI.ArcGIS.Client.Field("FIELD", ESRI.ArcGIS.Client.Field.FieldType.String, "Location Description", Nothing, False, True, 100)

 

Any ideas?

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  Permanently deleted user

  July 11, 2016 20:13

  Hi Mark

   

  have you tried:

   

  New ESRI.ArcGIS.Client.Field("myNewField", ESRI.ArcGIS.Client.Field.FieldType.String, "Location Description", Nothing, False, True, 100)

   

  just in case there is something special about your field name.

   

  Can you post a more complete snippet from your workflow for the forum to look at?

   

  Thanks

   

  Ralph Price

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  Permanently deleted user

  July 18, 2016 05:09

  Hi Ralph,

   

  I've looked at this further and it seems to be a logic problem or something else going on. If I add a field to a FeatureSet, obtained from a Query Task, it works fine. However, in my workflow I need to combine a number of FS into one and I do this via a List to output a new FS. Trying to add a field to the new FS fails no matter what type of field it is.

   

  Here's a simplified workflow snippet (.txt file):

   

  ftp://spatial:d0cspat1al@ftp.doc.govt.nz/Spatial/Geocortex

   

  Thanks,

   

  Mark

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  Erik Engstrom

  November 15, 2016 18:40

  I'm having this same issue. Were you able to figure it out?

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  Permanently deleted user

  June 15, 2017 23:20

  You first need to create a Field List, before declaring the Field.

   

  ASSIGN: FeatureSet1.Fields = New List (Of Esri.ArcGIS.Client.Field)

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