Gets the value of the specified column as a 64-bit signed integer.
public long GetInt64( int columnNumber );
This method retrieves the specified zero-based column value as a 64-bit signed integer. No conversions are performed, therefore the data retrieved must already be a 64-bit signed integer or an exception is generated. This method cannot be used to retrieve null values. Call AdsDataReader.IsDBNull to check for null values before calling this method.