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.NET Forum / ASP.NET / General / September 2007Retrieving contained Controls during postback using LoadPostData
I am writing a Control that inherits from System.Web.UI.WebControls.CompositeControl. Like many Controls, my Control renders more than just one inner Control. When a postback occurs, I need to get the data posted by these inner Controls (by using the postCollection argument). However, the postDataKey argument gives the key for the id of the outer Control. When I need to access the value posted by one of the inner Controls, I have found that I need to enter the id as a literal String for the key, but this seems a little too simple for me, with all the Controls that could get created. Is there some property or method that I should be using to determine the key? Thanks.  SignatureNathan Sokalski njsokalski@hotmail.com http://www.nathansokalski.com/ Hi, Control's UniqueID property is usually used as key in form post collection. SignatureTeemu Keiski AspInsider, ASP.NET MVP http://blogs.aspadvice.com/joteke http://teemukeiski.net >I am writing a Control that inherits from >System.Web.UI.WebControls.CompositeControl. Like many Controls, my Control [quoted text clipped - 6 lines] >Controls that could get created. Is there some property or method that I >should be using to determine the key? Thanks. That's what I thought, and what I have used in a previous Control of mine, but when I try to do that here I am recieving an error that the Control does not exist. When I did a debug session I found that the value of the Control was Nothing. Therefore, I cannot get to the UniqueID. Any idea what could be causing this? Thanks. SignatureNathan Sokalski njsokalski@hotmail.com http://www.nathansokalski.com/ > Hi, > [quoted text clipped - 11 lines] >>with all the Controls that could get created. Is there some property or >>method that I should be using to determine the key? Thanks. Does your control create child controls in CreateChildControls?. That way you ensure controls are there when you access the Controls collection. SignatureTeemu Keiski AspInsider, ASP.NET MVP http://blogs.aspadvice.com/joteke http://teemukeiski.net > That's what I thought, and what I have used in a previous Control of mine, > but when I try to do that here I am recieving an error that the Control [quoted text clipped - 16 lines] >>>with all the Controls that could get created. Is there some property or >>>method that I should be using to determine the key? Thanks. Note: if you access Control instance directly, call EnsureChildControls before that > Does your control create child controls in CreateChildControls?. That way > you ensure controls are there when you access the Controls collection. [quoted text clipped - 20 lines] >>>>some property or method that I should be using to determine the key? >>>>Thanks. Thank you for your help, I should probably be slapping myself in the head for my mistake: I created the Controls in CreateChildControls, but forgot the Me.Controls.Add() method! Thanks again for your help. SignatureNathan Sokalski njsokalski@hotmail.com http://www.nathansokalski.com/ > Does your control create child controls in CreateChildControls?. That way > you ensure controls are there when you access the Controls collection. [quoted text clipped - 20 lines] >>>>some property or method that I should be using to determine the key? >>>>Thanks.
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