How to use update panel for multiple drop down box

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Hi All Coders,

I am having 6 drop down on a aspx page, two boxed are bind at page_load() and the remaining drop downs will fill on selection of drop down values.

Pictorial representation

Now the issue is when I am selecting value from first drop down - > the second drop down is binding the data.
and when selecting value from 3rd drop down the values which selected in first and second are resetting to original.
------------
I tried following ways :
1) Kept drop down in update panel and tried, when selecting second drop down values the values from first drop down are resetting.

2)added trigger to update panel but facing same issue.

XML

<Triggers >
      <asp:AsyncPostBackTrigger ControlID ="dept" />
   </Triggers>

3) Added update panel to each drop down with trigger but same issue

How to achieve this functionality.
Please suggest...
Thanks in advance for your suggestions

-Avinash

Posted 12-Jan-15 22:52pm

Avinash6474

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Comments

Sibasisjena 13-Jan-15 4:56am

Hi Avinas,

Have you written the codes inside the
if(!IsPostBack)
{

}

Avinash6474 13-Jan-15 4:57am

Hi,
Yes I have this condition in code

Sibasisjena 13-Jan-15 5:01am

i think, onchange of your 3rd dropdown first 2 dropdowns are bound again.

Avinash6474 13-Jan-15 5:15am

Is there any way to preserve selected values?
Because if there is any other action(other than drop down selection) happening on page and page is geting postback then values from drop downs are getting initialized again. Losing selected values. :(

Sibasisjena 13-Jan-15 5:31am

Please send me your .cs file. You can use gett to share files. You can upload the file there. And give me the link. Else you post your code here.

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