Identifies the value of the specified column as a double-precision floating point number.
ordinal – an ordinal number indicating the column from which the value is obtained. The numbering is zero-based.
Call AseDataReader.IsDBNull to check for null values before calling this method.
No conversions are performed, so the data retrieved must already be a double-precision floating point number.
Use GetDouble for Adaptive Server type float with a precision greater than or equal to 16 and GetFloat for Adaptive Server types real and float with a precision less than 16.