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Custom ASP.NET DropdownList Control Using Chosen jQuery Plugin

, 16 Aug 2013 CPOL 38.9K 3.7K 19
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Custom ASP.NET DropdownList control using chosen jQuery plugin

Introduction

The ASP.NET DropDownList is an easy way to offer a set of selections for the user. However, if you want to allow the user to enter information not available in the dropdown list, you will have to write your own JavaScript code or jQuery. This source code combines that work into an ASP.NET DLL control you can easily place on any ASP.NET web page.

The downloadable source project above uses the following technologies:

Example

Background

You do not need to have knowledge of jQuery, JavaScript, or CSS to use the DropDownListChosen. The only requirement is to drag and drop the DropDownListChosen control. The source code download contains the class library project for the DropDownListChosen and a test website using the DropDownListChosen control.

Using the Code

To use the DropDownListChosen, you will need to follow these steps:

  1. Include a project reference to the DropDownChosen.dll to your ASP.NET webforms project.
    • You can skip steps 2 and 3 by using the DropDownListChosen from your Visual Studio toolbox.
    • To do so, be sure that you are currently editing a web page so that you can get access to the toolbox and ASP.NET controls.
    • From your Visual Studio toolbox, right click to create a new tab or use an existing one to add the DropDownListChosen. Start by right clicking in the toolbox and select "Choose Items.." and then browse to where you have saved the DropDownChosen.dll.
    • Once added, you can now double click or click and drag the DropDownListChosen to your web page to get started. This will automatically add the reference to your web project, place the proper code in the header of your web page, and add the control into your web page.
  2. Register the DropDownListChosen at the top of your web page:
    <%@ Register Assembly="DropDownChosen" 
    Namespace="CustomDropDown" TagPrefix="cc1" %> 
  3. Add the script tags for the DropDownListChosen on your web page:
    <cc1:DropDownListChosen ID="DropDownListChosen1" runat="server" 
                NoResultsText="No results match." width="350px"            
                DataPlaceHolder="Type Here..." AllowSingleDeselect="true">                
            </cc1:DropDownListChosen> 
  4. Bind items to your dropdown list either manually by adding ListItems to the DropDownListChosen or by binding to a DataSource.
    Datasource example can be found in the downloadable source code above.

You're done! You can now work with your DropDownListChosen to find what options work best for you. I would love to hear some great feedback if you use this control on your site.

History

  • 13th July, 2013: Tip published
  • 7th August, 2013: Added DataPlaceHolder property and removed style sheet that causes design problems
  • 7th September, 2013: Added new properties AllowSingleDeselect and DisableSearchThreshold

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Angel Blandón
Software Developer
Nicaragua Nicaragua
I am a ASP.Net Software Developer from Nicaragua.

Comments and Discussions

 
QuestionControl Problem Pin
UAB Mike Johnston15-Apr-15 2:39
memberUAB Mike Johnston15-Apr-15 2:39 
QuestionHow to Add the item if it is not in the list Pin
STPL TEST15-Apr-15 2:28
memberSTPL TEST15-Apr-15 2:28 
QuestionRTL right to left direction sites not working properly Pin
nawinsoft26-Mar-15 6:57
membernawinsoft26-Mar-15 6:57 
Questionunable to search if i add items dynamically Pin
Malar Karthik6-Mar-15 17:00
memberMalar Karthik6-Mar-15 17:00 
AnswerRe: unable to search if i add items dynamically Pin
Angel Blandón7-Mar-15 15:44
memberAngel Blandón7-Mar-15 15:44 
Questionhow to set the value of DropDownListChosen1 from javascript or jquery Pin
Member 1128534118-Feb-15 21:41
memberMember 1128534118-Feb-15 21:41 
AnswerRe: how to set the value of DropDownListChosen1 from javascript or jquery Pin
Angel Blandón19-Feb-15 2:15
memberAngel Blandón19-Feb-15 2:15 
GeneralRe: how to set the value of DropDownListChosen1 from javascript or jquery Pin
Member 1128534119-Feb-15 18:45
memberMember 1128534119-Feb-15 18:45 
Questionon postback styles are lost Pin
goud1238-Dec-14 4:41
membergoud1238-Dec-14 4:41 
QuestionHow to search as sql like '%a%' ? Pin
Nikhil Khandelwal (MCTS, Web 4.0)3-Nov-14 16:29
memberNikhil Khandelwal (MCTS, Web 4.0)3-Nov-14 16:29 
Questionhi Pin
chamila18-Sep-14 19:37
memberchamila18-Sep-14 19:37 
QuestionError Javascript [modified] Pin
dianaemanuel15-Jul-14 1:27
memberdianaemanuel15-Jul-14 1:27 
Questionthanks but after using this my other java script is not working.. pls help its urgent Pin
ranoooooooooo8-Jul-14 20:52
memberranoooooooooo8-Jul-14 20:52 
AnswerRe: thanks but after using this my other java script is not working.. pls help its urgent Pin
Angel Blandón9-Jul-14 4:08
memberAngel Blandón9-Jul-14 4:08 
QuestionThank You :) Pin
Member 109337018-Jul-14 19:51
memberMember 109337018-Jul-14 19:51 
QuestionHow to bind this drop down from sql database Pin
Harishankar Maurya12-May-14 0:44
memberHarishankar Maurya12-May-14 0:44 
AnswerRe: How to bind this drop down from sql database Pin
Angel Blandón12-May-14 2:30
memberAngel Blandón12-May-14 2:30 
AnswerMessage Automatically Removed Pin
19-Feb-14 3:32
memberMember 1014497619-Feb-14 3:32 
QuestionSearch option is not working Pin
Nuthan Gowda23-Dec-13 19:02
memberNuthan Gowda23-Dec-13 19:02 
AnswerRe: Search option is not working Pin
Moneer Tarabishi21-Oct-14 21:16
memberMoneer Tarabishi21-Oct-14 21:16 
GeneralRe: Search option is not working Pin
Angel Blandón22-Oct-14 4:21
memberAngel Blandón22-Oct-14 4:21 
GeneralRe: Search option is not working Pin
Moneer Tarabishi24-Oct-14 2:28
memberMoneer Tarabishi24-Oct-14 2:28 
QuestionMultiple controls on same page - making them unique? Pin
Eldorado22-Dec-13 8:39
memberEldorado22-Dec-13 8:39 
AnswerRe: Multiple controls on same page - making them unique? Pin
Angel Blandón2-Dec-13 9:40
memberAngel Blandón2-Dec-13 9:40 
QuestionCan we turn it to Multi Select ?? Pin
benaref28-Nov-13 23:57
memberbenaref28-Nov-13 23:57 

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