Which of the following will you use to retrieve rows from a data source in a DataReader?
A.
GetData
B.
GetValues
C.
Read
D.
ExecuteReader
Explanation:
You can retrieve data using a DataReader by creating an instance of the Command object and then
creating a DataReader by calling Command.ExecuteReader to retrieve rows from a data source.Answer C is incorrect. The Read() method is used to read a DataReader.
Answer A is incorrect. The GetData() method returns a DbDataReader object for the requested
column ordinal.Answer B is incorrect. The GetValues() method populates an array of objects with the column values
of the current row.