Solved

Can't set the selected option for dropdown using JQuery

Posted on 2013-06-21
8
1,344 Views
Last Modified: 2013-06-21
I have a web form that contains a textbox and a dropdown list.  The dropdown list is disabled unless there is a value in the textbox when the page loads.  This is done in the code behind.  Once the page is loaded, I use JQuery to enable and disable the textbox based on whether there is data in the textbox.  I have that working fine.  

What I need to do is reset the selected option to the first option in the list which is my Choose prompt with a value of "".  I can't seem to get the JQuery correct.  Here is the dropdown definition:

                        <asp:DropDownList ID="ddPromotionReason" runat="server"
                            AppendDataBoundItems="True" CausesValidation="True" ClientIDMode="Static" Enabled="False">
                                <asp:ListItem Value="">-- Choose Promotion Reason --</asp:ListItem>
                        </asp:DropDownList>

Here is the JQuery:

                    // Disable Promotion Reason DropDown if Promotion Date removed
                    $('#ddPromotionReason').attr("disabled", true);
                    // Remove option selected
                    $("#ddPromotionReason option[value='\"\"']").attr("selected", "selected");

Any help is greatly appreciated!
0
Comment
Question by:dyarosh
  • 4
  • 3
8 Comments
 
LVL 82

Expert Comment

by:leakim971
ID: 39265564
Use : $("#ddPromotionReason").val("");

Test page : http://jsfiddle.net/GPVQJ/
0
 
LVL 43

Accepted Solution

by:
Chris Stanyon earned 500 total points
ID: 39265565
Here you go:

$('#ddPromotionReason option:first-child').attr("selected", "selected");

Open in new window

0
 
LVL 82

Expert Comment

by:leakim971
ID: 39265568
work too : $("#ddPromotionReason option:first").attr("selected", "selected");
0
Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

 

Author Closing Comment

by:dyarosh
ID: 39265610
Thank you!!
0
 
LVL 82

Expert Comment

by:leakim971
ID: 39265632
From the main site : http://api.jquery.com/val/

Locate this section :
Example: Set a single select, a multiple select, checkboxes and a radio button .

Line 26
0
 
LVL 43

Expert Comment

by:Chris Stanyon
ID: 39265658
@leakim971 - Using val() is fine if you know the value you want to select, but not if you just want the first option selecting...
0
 
LVL 82

Expert Comment

by:leakim971
ID: 39265666
I believe he knowwhich value he want reading its try :
$("#ddPromotionReason option[value='\"\"']")

anyway, you got it, congrats, see you ;-)
0
 
LVL 43

Expert Comment

by:Chris Stanyon
ID: 39265673
What I need to do is reset the selected option to the first option in the list...
More than one way to skin a cat ;)
0

Featured Post

Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

What is a Lightbox? A Lightbox is the effect you see when you click, for example, an image and the screen fades out and up pops the same image but in its full size dimensions. There are lots of Lightbox effects for jQuery. Problem is they are a…
PROBLEM: The other day I was working on adding an ajax request to a webpage that already had a dialog box on the page.  The dialog box was using relative positioning to be positioned next to a form field I had on the page.  Everything was working…
The viewer will learn how to dynamically set the form action using jQuery.
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…

860 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question