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FindControl for Dynamic created Page controls

Hi All,

I am receiving the good old 'Object reference not set to an instance of an object.' error at  the moment when trying to use the FindControl within my code behind.

Here is what my Control Tree looks like when Trace is enabled:

ctl00$ContentPlaceHolder1$PlaceHolderQuestionType
   ctl00$ContentPlaceHolder1$PlaceHolderQuestions
      ctl00$ContentPlaceHolder1$phControlContainer
         ctl00$ContentPlaceHolder1$litStoredAnswer
         ctl00$ContentPlaceHolder1$litStoredQuestionType
         ctl00$ContentPlaceHolder1$litStoredControlID


The PlaceHolder control PlaceHolderQuestionType has been created manually and is there at development time.

ctl00$ContentPlaceHolder1$PlaceHolderQuestions and ctl00$ContentPlaceHolder1$phControlContainer are created dynamically within my code behind.

When trying to use the FindControl function like within my code attached I get 'Object reference not set to an instance of an object' which is referring to phControlContainer.

Can anyone see what I could be doing wrong?

Thanks,

Rit




PlaceHolder PlaceHolderQuestions = (PlaceHolder)PlaceHolderQuestionType.FindControl("PlaceHolderQuestions");

PlaceHolder phControlContainer = (PlaceHolder)PlaceHolderQuestions.FindControl("phControlContainer");

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rito1
Asked:
rito1
1 Solution
 
Alfred A.Commented:
You could try using a FindControlRecursive function if you want.  You can call it something like this as an example

PlaceHolder PlaceHolderQuestions = (PlaceHolder)FindControlRecursive(PlaceHolderQuestionType,"PlaceHolderQuestions");
public Control FindControlRecursive(Control Root, string Id)
        {
            if (Root.ID == Id) 
                return Root;

            foreach (Control Ctl in Root.Controls)
            {
                Control FoundCtl = FindControlRecursive(Ctl, Id);
                if (FoundCtl != null)
                    return FoundCtl;
            }
            return null;
        }

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rito1Author Commented:
Thanks Alfred1, I am just giving it ago.
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RickCommented:
Have you tried .FindControl("ContentPlaceHolder1_PlaceHolderQuestions" ... ?
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