Button Click event fires DropDownList_SelectedIndexChanged event but I don't want it.

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Hi

I have two drop down lists - ddl1 and ddl2 and a button.
I select a value from ddl1 which fires ddl1_selectedIndexChanged event.
On occurance of abovesaid event, ddl1 selected value goes to database in a SELECT statement in WHERE Clause to fetch some rows of required data.
This new data table now populates ddl2.
Now I select a value from ddl2.
I press the button.
Now I want to use the ddl2_selected value in button_click event.
What happens is when I press the button, ddl1_selectedIndexChanged event fires unexpectedly and binds the ddl2 once again and hence I loose the ddl2_selectedValue.

I have not used AJAX or Update Panel in my page.
ASP.NET 4.0.
ddl1 - EnableViewState True, PostBack = True
ddl2 - EnableViewState True, PostBack = False

Please help me out.
Thanks in advance.

Posted 6-Dec-12 7:02am

Rabbits Foot

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anil.luck 6-Dec-12 13:21pm

Can you please share your code in which you are getting stuck?it will be better to track the bug.

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Rabbits Foot · Answer 1 · 2012-12-07T06:41:00

Hi Everyone,

I resolved the issue by going through a couple of more blogs over net.
What I was doing was I wrote these entire set of controls in asp Panel.
The viewState property of this panel was set to False.
As soon as I changed it to true, the unwanted selectedindexchanged event got suppressed.

This got me through. :)

But, it was a hunch.
I did not yet got the reason why this happened ?

Explanations are most welcome.

@Anil: Thanks fot the concern.