Question

Trying to find an elegant solution for a problem in my CMS system. If someone moves a page, I need all the child pages to also be changed. Simplified database is like this:

id     url              parent        level
1      page.aspx         0             0
2      page2.aspx        0             0
3      page.aspx         1             1
4      page.aspx         1             1
5      page.aspx         3             2
6      page.aspx         3             2

If I decide to move id 3 to have 2 as a parent instead of 1, I need to change all of the url’s for the child pages.

Is there a simple(ish) recursive technique I can use for this?

Thanks

Answer 1

Something like this?

void IncrementUrlLevel(UrlCollection collection, UrlEntry entry){
    if (entry == null)
        return;

    foreach (UrlEntry childEntry in collection){
        if (childEntry.Parent == entry.Id){
            IncrementUrlLeven(collection, childEntry);
        }
    }

    entry.Level++;
}