Maptitude 2024 GISDK Help

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Maptitude GISDK Help

DestroyExpression()

Summary

Destroys an expression field.

Syntax

DestroyExpression(string field_spec)

Argument	Contents
field_spec	The expression field to be destroyed.

Notes

If the input field is an expression field on a joined view, and the joined view inherits this field from one of its component views, then the expression fields on both the joined view and the component view are destroyed.

Example

DestroyExpression("States.[Population Density]")

Error Codes

Error Type	Meaning
Error	The input field is not an expression field; or the input expression field is used as a link field in a joined view or is otherwise in use
NotFound	The specified field does not exist

See Also

Function	Summary
CreateExpression()	Creates an expression field on a view
VerifyExpression()	Verifies the validity of an expression
GetExpressions()	Returns an array of all expression fields defined in a view
GetExpressionInfo()	Returns information about an expression (formula) field

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