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I need to get the primary key column of the Particular layer added in the Map. Usually 'FID' be found for a Shapefile Layer Source and OBJECTID found for a SDE source layer.

Is there any way to Identify which one is the primary key columns so that I can access those values.

I need to get this using ArcGIS JS API Version.3.3 and I am using ArcGIS Server 10.

Please help me

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You can use "ObejectID".. I am using ObjectID column to display the attribute information of feature. For details please check ArcGIS Java Script API 3.3 samples –  Sunil Feb 5 '13 at 10:23

2 Answers 2

You could loop through the fields for each layer and find the Object ID data type.

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You could check it with Python...

import arcpy

layer= r"Put here the path to your data"
dscfc = arcpy.Describe(layer)

if dscfc.hasOID == True:
    print dscfc.OIDFieldName
else:
    print "No Primary Key found."

The OIDFieldName is the PK for the table.

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