TrendStorageReaderValueConverter.ConvertToString (METH)¶

METHOD ConvertToString : STRING

Converts a value read from the trend storage into a suitable string representation.

InOut:

Scope	Name	Type	Comment
Return	ConvertToString	STRING
Input	iWhichVariable	INT	A 0-based index of the variable within all variables, i.e. must be less the parameter iCountVariables of method SetVariableConfiguration
	liValue	LINT	The value, that was read from TblTrendData
	xValueNULL	BOOL	Indicates, whether NULL is stored in the trend storage
Output	eError	ETrendStorageReaderErrors	Returns a ETrendStorageReaderErrors value indicating, where the processing was completed successfully or not. ETrendStorageReaderErrors.NoError: Completed successfully ETrendStorageReaderErrors.InvalidCall: ConvertToString was called without calling method SetVariableConfiguration before ETrendStorageReaderErrors.WrongParameter: The value of the parameter iWhichVariable is invalid