Question

The list will grow and shrink depending on how many items I have in my database.

I need to populate a list not a listbox. I understand I will need to open a connection.

using (var conn = new SqlConnection(Properties.Settings.Default.DBConnectionString))
{
    using (var cmd = conn.CreateCommand())
    {
        conn.Open(); 

        List<string> TagList = new List<string>();
        for (int i = 0; i < TagList.Count; i++)
            TagList[i].Add("Data from database");

        cmd.ExecuteNonQuery();
    }
}

I’m really not sure how to do this and I’m sure my method up here looks very wrong so I really need help.

Could someone show me what I’m doing wrong?

Answer 1

public IEnumerable<string> GetTagList()
{
    using (var connection = new SqlConnection(Properties.Settings.Default.DBConnectionString))
    using (var cmd = connection.CreateCommand())
    {
        connection.Open();
        cmd.CommandText = "select Tag from TagsTable"; // update select command accordingly
        using (var reader = cmd.ExecuteReader())
        {
            while (reader.Read())
            {
                yield return reader.GetString(reader.GetOrdinal("Tag"));
            }
        }
    }
}

then you can call it as below

List<string> tags = GetTagList().ToList();