find control question

  • Thread starter Thread starter WebBuilder451
  • Start date Start date
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WebBuilder451

i have a master page and aseries of controls labeled fn1, fn2, fn3 , ...

i want ot loop and use find control but i'm finding them.
i'm using the following w/o luck

ContentPlaceHolder cph =
(ContentPlaceHolder)Page.Master.FindControl("ContentPlaceHolder1");

for (int i = 0; i < 7; i++)
{
TextBox tbF = (TextBox)cph.FindControl("tbFN" + i.ToString());
TextBox tbL = (TextBox)cph.FindControl("tbLN" + i.ToString());

.........
}

they come up null
where are the controls located??
--
(i''ll be asking a lot of these, but I find C# totally way cooler than vb
and there''s no go''n back!!!)
thanks (as always)

kes
 
Appreciate the response!
no just an HTML table.
i have to be doing something odd for this not to be straight forward

if i wanted to use findcontrol even though i don't need to us shouldn't it
just work?

the object Page.Master.NamingContainer gives me a list of the controls in
debug
i'd think a simple findControl should work?
--
(i''ll be asking a lot of these, but I find C# totally way cooler than vb
and there''s no go''n back!!!)
thanks (as always)

kes
 
total bummer here with this i, know! My solution is total over kill here, but
it works

ok, use generics to return a list of controls.
i use this in a name space, but you could just use it for a simple
/// <summary>
/// returns a list of the given controls
/// </summary>
/// <param name="root"></param>
/// <param name="typ"></param>
/// <param name="ControlList"></param>
/// <returns></returns>
public static List<Control> GetAListOfControls(Control root, Type
typ, List<Control> ControlList)
{
foreach (Control t in root.Controls)
{
if (t.GetType() == typ)
ControlList.Add(t);
if (t.Controls.Count > 0)
{
ControlList = GetAListOfControls(t, typ, ControlList);
}
}
return ControlList;
}

then call it thus for the texh boxes:

List<Control> ctrls = new List<Control>();
ctrls = AdminPageHelper.GetAListOfControls(cph, typeof(TextBox), ctls);

from there you got the list loop or use as you see fit.
 
a lot of work for a simple task. But i'll try it!
--
(i''ll be asking a lot of these, but I find C# totally way cooler than vb
and there''s no go''n back!!!)
thanks (as always)

kes
 
ok, thanks i'll check them out

--
(i''ll be asking a lot of these, but I find C# totally way cooler than vb
and there''s no go''n back!!!)
thanks (as always)

kes


Mark Rae said:
[top-posting corrected]
No just an HTML table.
Click to expand...

As I thought... The answer is, therefore, "Yes, they are located within an
HTML table"... ;-)
I have to be doing something odd for this not to be straight forward
Click to expand...

Nope - what you are seeing is standard behaviour.
If I wanted to use FindControl even though I don't need to us shouldn't it
just work?
Click to expand...

It is working precisely as it was designed, not the way you think it
should... :-)

FindControl is not recursive - if you tell it to find a control in a page,
it will find only those controls which are directly contained within the
Page container, not those which are contained in child containers.

There are loads of workarounds for this:
http://www.google.co.uk/search?sour...BGB252GB252&q="ASP.NET"+FindControl+recursive
Click to expand...
 
then try this routine:

var list = ControlWalker(this, ctl =>
ctl.ID.StartsWith("tbFN") ||
ctl.ID.StartsWith("tbLN"));

....

public List<Control> ControlWalker(
Control ctl,
Predicate<Control> matcher)
{
var list = new List<Control>();
if (matcher(ctl)) list.Add(ctl);
for (int i=0; i < ctl.Controls.Count; ++i)
{
var childList = ControlWalker(
ctl.Controls,matcher);
if (childList.Count > 0)
list.AddRange(childList);
}
return (list);
}



-- bruce (sqlwork.com)
 
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