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AnswerRe: ASP.NET Website Template or CMS for Database-driven site? Pin
sriyanssharma5-Nov-18 21:58
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QuestionASP.NET Website Template or CMS for Database-driven site? Pin
Member 1214932324-Oct-18 23:10
Member 1214932324-Oct-18 23:10 
AnswerRe: ASP.NET Website Template or CMS for Database-driven site? Pin
Afzaal Ahmad Zeeshan25-Oct-18 2:36
professionalAfzaal Ahmad Zeeshan25-Oct-18 2:36 
GeneralASP.NET MVC dependency injection Pin
Dwayne Barsotta24-Oct-18 19:32
Dwayne Barsotta24-Oct-18 19:32 
GeneralRe: ASP.NET MVC dependency injection Pin
Nathan Minier25-Oct-18 1:21
professionalNathan Minier25-Oct-18 1:21 
QuestionRadGrid hierarchy parentID using command-template Pin
jsegreti9-Oct-18 18:03
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AnswerRe: RadGrid hierarchy parentID using command-template Pin
Vincent Maverick Durano11-Oct-18 11:28
professionalVincent Maverick Durano11-Oct-18 11:28 
Questioncreate dynamic textBoxes Pin
Member 933127825-Sep-18 3:30
Member 933127825-Sep-18 3:30 
AnswerRe: create dynamic textBoxes Pin
Dar Brett25-Sep-18 4:55
Dar Brett25-Sep-18 4:55 
AnswerRe: create dynamic textBoxes Pin
F-ES Sitecore26-Sep-18 22:43
professionalF-ES Sitecore26-Sep-18 22:43 
QuestionHow to Complete Angular/Typescript-Based Web Development Workflow in Restricted Environment Pin
Christopher Koeber23-Sep-18 10:36
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AnswerRe: How to Complete Angular/Typescript-Based Web Development Workflow in Restricted Environment Pin
jkirkerx25-Sep-18 8:07
professionaljkirkerx25-Sep-18 8:07 
QuestionMessage Closed Pin
23-Sep-18 9:16
Christopher Koeber23-Sep-18 9:16 
AnswerRe: Using Latest Angular/Typescript Web Development Pipeline within Restricted Environment Pin
Nelek23-Sep-18 9:17
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GeneralRe: Using Latest Angular/Typescript Web Development Pipeline within Restricted Environment Pin
Christopher Koeber23-Sep-18 10:23
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QuestionTry to dynamic text box Pin
Member 933127821-Sep-18 11:09
Member 933127821-Sep-18 11:09 
AnswerRe: Try to dynamic text box Pin
Richard Deeming21-Sep-18 13:10
mveRichard Deeming21-Sep-18 13:10 
You didn't tell us which line the exception was thrown from, so this is a guess.

Page_PreInit is too early. The other controls haven't been created yet, so pn1TextBoxes is null when you try to add the controls to it.

Move your control creation code to the page's Init event instead.

Have a read of this series of blog posts - they're from 2006, but they still apply today:
Infinities Loop - TRULY Understanding Dynamic Controls (Part 1)[^]
Infinities Loop - TRULY Understanding Dynamic Controls (Part 2)[^]
Infinities Loop - TRULY Understanding Dynamic Controls (Part 3)[^]
Infinities Loop - TRULY Understanding Dynamic Controls (Part 4)[^]



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QuestionAccepting application/x-www-urlencode format data Pin
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QuestionMVC: Can a controller know its URL without being called? Pin
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AnswerRe: MVC: Can a controller know its URL without being called? Pin
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