Question

What are the operations performed by adapter.Fill(ds, "titles") in the SqlDataAdapter class? Select all that apply.

A.Open a connection.
B. Create and initialize a table with the matched schema.
C. Retrieve records and write into the table.
D. Cast the record back into the database for verification.
E. Close the connection to the database.

Answer 1

The adapter.Fill(ds, "titles") method in the SqlDataAdapter class is used to open a connection, retrieve records, and write them into a specified data table.

Step-by-step explanation:

The adapter.Fill(ds, "titles") method in the SqlDataAdapter class is used to perform operations to retrieve records from a database and write them into a data table specified by the dataset (ds) and the table name ("titles"). The operations performed by this method include:

1. Open a connection: The method opens a connection to the database in order to retrieve the records.
2. Retrieve records and write into the table: It retrieves the records from the database and writes them into the specified data table.
3. Close the connection to the database: Once the records have been retrieved and written into the table, the method closes the connection to the database.

These operations help to populate the data table with the records retrieved from the database, ready for further processing or display.