Dropdowns & Textboxes

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Hey Guys,

Need your amazing help ;)

I have an entry page with a number of dropdownlists & textboxes.

I want to be able to select a value from the dropdownlist DepreciationRate e.g 0.5% then enter a Cost price into a Cost Textbox, when i do this, I would like to be able to do a quick calculation and place the answer into another empty text box called Total Depreciation.

I've tried sending the selected value from DepreciationRate DDL to a textbox, then do a calculation from a hidden textbox with that choice and the Cost textbox but it doesn't work.

Here's what I mean...

http://i1145.photobucket.com/albums/o506/MConnolly1991/Capture-1.png?t=1343123479[^]

My dropdownlists are bound to a database also.

Thanks guys! Appreciate your help.

Posted 23-Jul-12 23:53pm

EuphorialXTC

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bbirajdar 24-Jul-12 6:04am

You need to use client side javascript..

EuphorialXTC 24-Jul-12 6:23am

Ok thanks, will look into it. Never used it before!

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_Amy · Answer 1 · 2012-07-24T00:08:00

Solution 1

Hi,
Try writing your calculation in OnLostFocus event of Textbox.
Refer the links below:
http://stackoverflow.com/questions/1310902/asp-net-textbox-lostfocus-event[^]
http://stackoverflow.com/questions/3863927/lost-focus-method-for-asp-net-textbox[^]
http://stackoverflow.com/questions/384820/adding-javascript-to-the-onblur-property-of-an-asp-net-text-box-control[^]

---Amit

Posted 24-Jul-12 0:08am

_Amy

Comments

EuphorialXTC 24-Jul-12 6:23am

Thanks Amit, will look into them now and let you know if they help!

EuphorialXTC 24-Jul-12 7:30am

I can't really make sense of how it works as I'm new to C# & ASP. I use onchange instead of onblur, because I have javascript validation implied. I'll post my code below!