Page.FindControl returns null in some arbitrary class other than the Page

Question

page = (Page)HttpContext.Current.CurrentHandler;
TextBox txtEndUser = ((TextBox)page.FindControl("txtEndUser"));

Here txtEndUser always comes as null.

How can we fix this ?

Where do you write this code? in the asp.net page or in a SharePoint control, User control or where? — Ahmed Magdy, Jun 15 '11 at 08:21

score 0 · Answer 1 · answered Jun 15 '11 at 07:57

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If the page does not directly contains the TextBox control, then you wont be able to retrieve it with the FindControl function. You need to create a function that search contained containers for the target control ..

answered Jun 15 '11 at 07:57

Akram Shahda

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score 0 · Answer 2 · edited May 23 '17 at 12:04

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It appears to me that this code snippet is in HttpModule so probably, the request has not been handed out to a handler yet (for example, you're in BeginRequest).

Reference: Why HttpContext.Current.Handler is null?

edited May 23 '17 at 12:04

Community

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answered Jun 15 '11 at 08:27

Ahmed Magdy

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Here Handler is not coming as null, Handler is perfectly set to the Page object and I am using other members of Page object. Rather, the txtEndUser is coming out as null, I am using this code in a Class method that is being called from a UserControl loaded in a Sharepoint Webpart which itself is in asp.net Page. – teenup Jun 15 '11 at 12:49

score 0 · Accepted Answer · answered Jun 15 '11 at 08:27

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As a workaround if you don't find the way using FindControl you can add public getter to your custom page class the have something like this:

WebForm1 myForm = (WebForm1)HttpContext.Current.CurrentHandler;
TextBox txtEndUser = myForm.GetEndUserTextbox();

answered Jun 15 '11 at 08:27

Shadow The GPT Wizard

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Thanks, but I knew this method, I wanted to know the reason why the above code is not working. – teenup Jun 15 '11 at 12:50
@Puneet dunno, quick test with one Page and static class did work, so you probably have something "fancy" like Module? Or maybe you run the code before the `Page_Load` event? – Shadow The GPT Wizard Jun 15 '11 at 12:53
I am running the code on a Button's OnClick event which is probably after Page_Load, but don't know why its not working. – teenup Jun 15 '11 at 12:57
@Puneet so please add this information to your question by editing it, plus give more code - give the code in that "arbitrary class" you have. – Shadow The GPT Wizard Jun 15 '11 at 13:05

Page.FindControl returns null in some arbitrary class other than the Page

3 Answers3