Recursive function logic problems.

[jgd123456]

Hi, i'm having abit of trouble with some logic. I have the following functions:

public static ListItemCollection GetCategoriesListBySectionId(int sectionId) {
    return GetCategoriesListItemBySectionId(null, sectionId, 0, "");
}

public static ListItemCollection GetCategoriesListItemBySectionId(ListItemCollection list, int sectionId, int parentId, string prefix) {
    foreach (CategoriesItem category in Categories.GetCategoriesBySectionId(sectionId, parentId)) {
        ListItem item = new ListItem();
        item.Text = prefix + category.CategoryName;
        item.Value = category.CategoryId.ToString();
        list.Add(item);
        Categories.GetCategoriesListBySectionId(list, sectionId, category.CategoryId, prefix + "##");
    }

    return list;
}

Then i can bind to the GetCategoriesListBySectionId via the object datasource (to my dropdownlist) passing in the sectionid from the query string. This works fine however i don't like the idea of having two functions to do this. There was two reasons i did it this way.

1. I could need see how to pass constants via the objectdatasource select parameters.
2. I could not see how to recursively add the additional items to the list collection, therefore i passed it along with the function.

Appreciate if someone could tell me if this is possible. Thanks