Dynamic Control and View State

Posted 19 Sep '12 - 8:17

sam_asp.net320

Edited 19 Sep '12 - 9:04

Wes Aday59.2K

Wes Aday - 19 Sep '12 - 14:25

Okay and what specific issue are you having trouble with? What have you tried?

Sandeep Mewara - 19 Sep '12 - 15:01

It's a repost! I replied him today only.

Solution 1

You can definitely achieve this without using javascript or jquery. Here, the major problem is that you loose the dynamically created UI or the values on the post back of your "ADD" button click. The trick is to recreate your UI on postbacks.

1. Keep all your dynamic UI generation in one single method, say CreateDynamicUI()

2. In your CreateDynamicUI() ensure that you keep track of all the UI elements and assign unique IDs.

3. In-order to recreate UI on every postback, call CreateDynamicUI() in the Page_Load() of your aspx

4. In the "ADD" button click event, do a FindControl to get handles to the dynamically created elements.

I recommend to add all the dynamic content to one single parent control such as a panel or a table in-order to make the parsing easy.

Permalink

Posted 19 Sep '12 - 9:00

Rajesh Kuramdasu579

Comments

Espen Harlinn - 20 Sep '12 - 4:16

Good points :-D

Solution 2

I replied you today: http://www.codeproject.com/Messages/4371298/Re-Dynamic-Control-Help.aspx[^]

Why a repost? Did you try it? Please try and post specific issue.
Steps:
1. Define a GENERATE Button click handler X
2. In X, get the number provided in Textbox (say y)
3. Define a counter(say z). Set it to one.
4. Code a for loop from zero to y-1 (loop runs y times)
5. Create a dropdownlist inside the loop using new.

Provide ID

Define a datasource - a list

Populate list with fixed 10 numbers starting from z. for first loop z goes from 1 to 10, next 11-20...

Bind the datasource to dropdonw

Add the dropdown to the defined panel/placeholder in UI

6. Once for loop ends, create a button (A), define click event and add that too the defined panel/placeholder in UI.
7. for click event of A, do your manipulations as per need.

Try!

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Posted 19 Sep '12 - 9:03

Sandeep Mewara473K

Comments

_Amy - 19 Sep '12 - 15:44

My +5! Good explanation. :)

Sandeep Mewara - 19 Sep '12 - 16:34

Thanks!

Espen Harlinn - 20 Sep '12 - 4:15

5'ed!

Sandeep Mewara - 20 Sep '12 - 4:54

Thanks.

Solution 3

Sandeep is already given the steps to create and manage Dynamic Asp.Net controls. If you need little more help or guideline while creating the controls then refer the links for similar articles:
Dynamically Created Controls in ASP.NET[^]
Working with Dynamically Created Controls[^]
Dynamically Created Controls in ASP.NET[^]
Creating ASP.NET Controls Dynamically[^]

--Amit

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Posted 19 Sep '12 - 9:48

_Amy38.1K

Comments

Espen Harlinn - 20 Sep '12 - 4:16

Nice links :-D

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Dynamic Control and View State

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