public override void Write(ref Data.DataHolder holder)
{
    //set the db type
    holder.Parameter.DbType = System.Data.DbType.String;

    //if there is no value we could specify what to set the db field to
    if (holder.NoValue)
    {
        //in this case we just want to set it to null
        holder.Parameter.Value = null;
    }
    else
    {
        //When there is a value we simply need to take our CLR int, and convert it to a string
        //and then set the parameter info
        string s = holder.Int32Value.ToString();
        holder.Parameter.Size = s.Length;
        holder.Parameter.Value = s;
    }
}