Question

I want to store many record that I query from database in list , one record has 10 fields, in order to loop it later.
But I have no idea to do that. Anyone can answer me please.

Answer 1

Below is a good practice to store data and loop through among them.

Create Model/POCO class as:

public class DataClassName
{
    public int Id { get; set; }
    public string Name { get; set; }
    //Create properties according to your fields
}

Fill and get data list:

public List<DataClassName> GetDataList()
{
    List<DataClassName> dataList = new List<DataClassName>();
    SqlCommand cmd = new SqlCommand();
    cmd.CommandText = "select * from TargetTableName";
    cmd.CommandType = CommandType.Text;
    try
    {
        using (SqlConnection connection = 
                   new SqlConnection("YourConnectionString"))
        {
            cmd.Connection = connection;
            connection.Open();
            SqlDataReader reader = cmd.ExecuteReader();
            if (reader.HasRows)
            {
                while (reader.Read())
                {
                    dataList.Add(
                        new DataClassName()
                            {
                                Id = Convert.ToInt32(reader["ID"]),
                                Name = Convert.ToString(reader["Name"])
                                //Set all property according to your fields
                            });
                }
            }
        }
    }
    catch(Exception ex_)
    {
        //Handle exception
    }
    return dataList;
}

Save data that is returned from GetDataList() into your datalist and loop through among the data as required.