Question

Change focus between postbacks : textbox and dropdownlist

Asked by: erwin_des

I have a webpage where a textbox and several dropdownlists reside on the same updatepanel.
The textbox is doing an autopostback. On the serverside (textchanged-event) I verifiy the value and it changes another textbox which gets some values from the database and is enabled.

Problem however in the behavior: when filling the textbox and clicking with the mouse on the dropdwonlist , the dropdownlist opens and closes very fast. The user needs to click a second time to view the values again.

It seems due to the fact that when leaving the textbox by clicking another control, the textcanged event is called and looses focus to the new selected control (a dropdownlist for instance).

How can I avoid this annoying behavior caused by the postback of the textbox?  
When using the tab-key, there is no problem at all...

Thanks in advance for any help.

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Asked On
2009-08-15 at 04:02:40ID24655000
Tags

AJAX

Topics

Asynchronous Javascript and XML (AJAX)

,

Programming for ASP.NET

Participating Experts
2
Points
500
Comments
2

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Answers

 

by: Mortaza_doulatyPosted on 2009-08-15 at 05:04:03ID: 25105086

One way could be this: after getting focus in a new control, check the condition and then do a post-back. e.g. when dropdownlist gets focus, you can avoid the post-back.

 

by: vazglPosted on 2009-08-15 at 11:23:53ID: 25106363

My Suggestion would be to exclude the dropdownlist from the update panel and use update panels only on the controls which need to be updated like the textbox and add triggers to update panel.

unless the textchange event is going to change the content of the dropdownlist

Regards,
Vikas.

20120131-EE-VQP-002

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