Question

I’m struggling to understand why when I add an item to my string array “internalDives”, the method exits and there is no debug error shown.

Please, what have I done wrong here?

private void GridDataConnection()
{
    using (SqlCeConnection conn = new SqlCeConnection(ConnectionString))
    {
        conn.Open();

        using (SqlCeCommand command = new SqlCeCommand("SELECT id,divelocation,divedate,diveduration FROM loggeddives", conn))
        {
            SqlCeDataReader readDiveResult = command.ExecuteReader();

            var diveList = new List<string[]>();

            while (readDiveResult.Read())
            {
                string[] internalDives = new string[4];

                internalDives[0] = readDiveResult.GetString(0);
                internalDives[1] = readDiveResult.GetString(1);
                internalDives[2] = readDiveResult.GetString(2);
                internalDives[3] = readDiveResult.GetString(3);

                diveList.Add(internalDives);

                i++;
            }
        }

        conn.Close();
    }
}

Answer 1

Are you sure all columns types are string? GetString doesn’t make any conversion and suppose all columns are of type string. I suggest you to use a try catch statement for catching any InvalidCastException.

Check also that all values are instanced. You can do it with IsDBNull method.