Question

Let’s say I have a class Car like this:

class car 
{
string model;
int position;
}   

Position is a number from 1 to n, which basically reflects position in the list.
if I have two cars in list they will have positions 1 2.
Now, I’d like to reorder those cars in list in the UI and reflect change in the property for later uses.
So I have a table with several rows:

Car1  1  
Car2  2     
Car3  3   
Car4  4   

Now, If I want to reorder items I can drag Car4 and place it at position 2 (right after Car1).
So, my positions will be as follows:

Car1  1  
Car4  2     
Car2  3   
Car3  4    

So, what I want to do is to update one item in the list, and all other items will be automatically updated.

Answer 1

I guess something like this:

BindingList<car> list = new BindingList<car>();
list.ListChanged += new ListChangedEventHandler(list_ListChanged);

void list_ListChanged(object sender, ListChangedEventArgs e)
        {
            list[e.OldIndex].position = e.NewIndex;
            for (int i = e.NewIndex; i < list.Count; i++)
            {
                list[i].position = i+1;
            }
        }