What is the way to utilize SqlDataReader within a loop?

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To utilize SqlDataReader within a loop, you can follow these steps:

1. Initialize the SqlDataReader object and execute the SELECT query using the SqlCommand object.
2. Use the Read() method of the SqlDataReader object to read the first row of data returned by the query.
3. Use a while loop to continue reading data from the SqlDataReader object until there are no more rows to read.
4. Within the while loop, extract the values from the columns of the current row using the "GetValue" method of the SqlDataReader object and assign them to variables for processing.
5. Perform your desired operations on the extracted data.
6. At the end of the loop, close the SqlDataReader object.

Example code:

using (SqlConnection connection = new SqlConnection(connectionString))
{
    connection.Open();

    string query = "SELECT column1, column2 FROM myTable";
    SqlCommand command = new SqlCommand(query, connection);

    SqlDataReader reader = command.ExecuteReader();

    while (reader.Read())
    {
        int column1Value = reader.GetValue(0);
        string column2Value = reader.GetValue(1).ToString();

        // Perform operations on extracted data
    }

    reader.Close();
}