Expression Fields

Expression (formula) fields are always part of a view. Once you create an expression field, GetFields() and GetMappableFields(), and all other GetField...() GISDK functions, work on the expression fields just as with any other field in the view. Here is a summary of GISDK functions you use to create and work with expression fields:

GISDK Function	Summary
CreateExpression()	Creates an expression field on a view
CreateNodeField()	Creates a formula field on a line layer using data from the associated node layer
DestroyExpression()	Destroys an expression field
GetExpressionInfo()	Returns information about an expression (formula) field
GetExpressions()	Returns an array of all expression fields defined on a view
VerifyExpression()	Verifies the validity of an expression