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Posted 13 Jul 2013

Custom ASP.NET DropdownList Control Using Chosen jQuery Plugin

, 26 Oct 2015
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Custom ASP.NET DropdownList control using chosen jQuery plugin


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:



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 Nuget-Package

You can now reference this project as a nuget package.

  • Install-Package DropDownListChosen

This will add necesary configuration for you, just add the control tag to your webform like this.

<asp:DropDownListChosen ID="DropDownListChosen1" runat="server" 

            NoResultsText="No results match." width="350px"            

            DataPlaceHolder="Type Here..." AllowSingleDeselect="true">                
  1. 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.

Also added a repository on github.


  • 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
  • 25 Octiber, 2015: Added as a Nuget Package


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


About the Author

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

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Comments and Discussions

QuestionNice but same problem as ajax combobox Pin
ktkiebel17-Sep-13 17:28
memberktkiebel17-Sep-13 17:28 
QuestionSearch option not displaying Pin
anuexuberant11-Sep-13 3:31
memberanuexuberant11-Sep-13 3:31 
AnswerRe: Search option not displaying Pin
Angel Blandón11-Sep-13 6:42
memberAngel Blandón11-Sep-13 6:42 
QuestionSelected item not working Pin
Member 102092289-Sep-13 6:56
memberMember 102092289-Sep-13 6:56 
AnswerRe: Selected item not working Pin
Angel Blandón9-Sep-13 8:27
memberAngel Blandón9-Sep-13 8:27 
QuestionZIP file broken? Pin
Member 1020758214-Aug-13 14:13
memberMember 1020758214-Aug-13 14:13 
AnswerRe: ZIP file broken? Pin
Angel Blandón14-Aug-13 18:14
memberAngel Blandón14-Aug-13 18:14 
GeneralRe: ZIP file broken? Pin
Member 1020758215-Aug-13 6:18
memberMember 1020758215-Aug-13 6:18 
for some reason it will not open. I have tried three different browsers (IE,CHROME,Mozilla). Even on the browse code page it is showing a file error. I think the zip file is corrupt. Can you please create a new zip folder and attach the files?
GeneralRe: ZIP file broken? Pin
Member 1020758215-Aug-13 8:05
memberMember 1020758215-Aug-13 8:05 
Questionhow to use in MVC4 Pin
Mohit Jagtap10-Aug-13 3:22
memberMohit Jagtap10-Aug-13 3:22 
AnswerRe: how to use in MVC4 Pin
Angel Blandón10-Aug-13 7:13
memberAngel Blandón10-Aug-13 7:13 
Questionchanging the entire page design while adding DropDownListChosen dll Pin
shyamrashun6-Aug-13 19:52
membershyamrashun6-Aug-13 19:52 
AnswerRe: changing the entire page design while adding DropDownListChosen dll Pin
Angel Blandón7-Aug-13 5:07
memberAngel Blandón7-Aug-13 5:07 
GeneralRe: changing the entire page design while adding DropDownListChosen dll Pin
Member 103280719-May-14 15:10
memberMember 103280719-May-14 15:10 
QuestionLook and feel gets disturbed Pin
Member 911410726-Jul-13 19:36
memberMember 911410726-Jul-13 19:36 
Suggestionsource code Pin
techchallenger14-Jul-13 10:06
membertechchallenger14-Jul-13 10:06 
GeneralRe: source code Pin
arbh8914-Jul-13 10:14
memberarbh8914-Jul-13 10:14 
GeneralRe: source code Pin
techchallenger14-Jul-13 10:19
membertechchallenger14-Jul-13 10:19 
GeneralRe: source code Pin
Аslam Iqbal14-Jul-13 19:29
memberАslam Iqbal14-Jul-13 19:29 
GeneralRe: source code Pin
techchallenger15-Jul-13 3:13
membertechchallenger15-Jul-13 3:13 
GeneralRe: source code Pin
Аslam Iqbal15-Jul-13 19:19
memberАslam Iqbal15-Jul-13 19:19 

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