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Posted 1 Nov 2011

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Findcontrol using a non recursive approach

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25 Nov 2011CPOL
Ha! I get it....I am actually using an adaptation of this technique in production code.But the adapted code required a dept-first search and this original pattern is width-first.Which brings us these new and improved versions:public static List FindControlsWidthFirst( Control...

Ha! I get it....



I am actually using an adaptation of this technique in production code.
But the adapted code required a dept-first search and this original pattern is width-first.
Which brings us these new and improved versions:


C#
public static List<control> FindControlsWidthFirst( Control controlTop )
{
    List<control> list = new List<control>();
    list.Add(controlTop); 
    //NOTE: we are not using a foreach, 
    //      which means that as long as the current parent has children,
    //      list.Count increases... which means we will automatically 
    //      Get a next itteration because 'i' is still < than the count.
    for (int i = 0; i < list.Count; ++i)
    {
        list.AddRange(list[i].Controls);
    } 
    return list;
}
public static List<control> FindControlsDepthFirst( Control controlTop )
{
    List<control> list = new List<control>();
    list.Add(controlTop); 
    //NOTE: we are not using a foreach, 
    //      which means that as long as the current parent has children,
    //      list.Count increases... which means we will automatically 
    //      Get a next itteration because 'i' is still < than the count.
    for (int i = 0; i < list.Count; ++i)
    {
        // insert into the position for the next itteration:
        list.InsertRange(i + 1, list[i].Controls);
    } 
    return list;
}
</control></control></control></control>

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Kabwla.Phone
Software Developer (Senior)
Netherlands Netherlands
Doing that 'computer thing' ever since the C64.

Sometimes I feel that being a programmer is much like being a doctor: You just have to know everything and if you don't, something dies.

Either being an application or a patient.

Oddly enough, more people care about the death of their application, than the massacre of people...

Comments and Discussions

 
Generalyes, i have this namespace but everytime i get this error me... Pin
Member 38257113-Feb-12 2:05
MemberMember 38257113-Feb-12 2:05 
GeneralRe: I would not know, I have only used it in winform environment... Pin
Kabwla.Phone13-Feb-12 2:26
MemberKabwla.Phone13-Feb-12 2:26 
Generalcannot convert from 'System.Web.UI.ControlCollection' to 'Sy... Pin
Member 38257112-Feb-12 23:33
MemberMember 38257112-Feb-12 23:33 
GeneralRe: Assembly mscorlib.dll, v4.0.30319 namespace System.Collecti... Pin
Kabwla.Phone12-Feb-12 23:56
MemberKabwla.Phone12-Feb-12 23:56 
GeneralReason for my vote of 5 Perfect if you don't care whether yo... Pin
PopeDarren21-Dec-11 4:49
MemberPopeDarren21-Dec-11 4:49 
GeneralVery clever. However, without the comment explaining that th... Pin
tpwright44238-Nov-11 1:52
Membertpwright44238-Nov-11 1:52 
GeneralRe: Why is that. Explain please. Pin
rj458-Nov-11 8:22
Memberrj458-Nov-11 8:22 
Why is that. Explain please.

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