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Posted 27 Jan 2008
Licenced CPOL

Selecting / Deselecting all the CheckBoxes Inside a GridView

, 9 May 2008
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This article describes how to select and unselect all the checkboxes inside a GridView control.



I am going to present here a functionality that selects / deselects all checkboxes of a particular column inside a GridView control, provided the header checkbox of that column is checked or unchecked using JavaScript. This functionality also has a feature that when all checkboxes of a particular column inside the GridView are checked, then the header</code /> checkbox gets checked, and vice versa.

Using the code

I have used a TemplateField inside the GridView and put a CheckBox in the ItemTemplate as well as another CheckBox in the HeaderTemplate of the TemplateField.

The HTML code looks like this:

<asp:GridView ID="gvCheckboxes" runat="server" 

              AutoGenerateColumns="False" OnRowCreated="gvCheckboxes_RowCreated">
      <asp:BoundField HeaderText="S.N." DataField="sno">
         <HeaderStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="50px" />
         <ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="50px" />
      <asp:TemplateField HeaderText="Select">
            <asp:CheckBox ID="chkBxSelect" runat="server" />
         <HeaderStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="50px" />
         <ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="50px" />
            <asp:CheckBox ID="chkBxHeader" 

                 onclick="javascript:HeaderClick(this);" runat="server" />
            <asp:CheckBox ID="chkBx" runat="server" />
         <ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="50px" />
   <RowStyle BackColor="Moccasin" />
   <AlternatingRowStyle BackColor="NavajoWhite" />
   <HeaderStyle BackColor="DarkOrange" Font-Bold="true" ForeColor="white" />

Attach a client-side onclick event on the header checkbox [chkBxHeader].

<asp:CheckBox ID="chkBxHeader" onclick="javascript:HeaderClick(this);" runat="server" /> 

Put the following code in the GridView's RowCreated event:

if (e.Row.RowType == DataControlRowType.DataRow && 
   (e.Row.RowState == DataControlRowState.Normal ||
    e.Row.RowState == DataControlRowState.Alternate))
   CheckBox chkBxSelect = (CheckBox)e.Row.Cells[1].FindControl("chkBxSelect");
   CheckBox chkBxHeader = (CheckBox)this.gvCheckboxes.HeaderRow.FindControl("chkBxHeader");
   chkBxSelect.Attributes["onclick"] = string.Format

In the above code, a client side onclick event has been attached to the child checkbox [chkBxChild].

Add this JavaScript in the page’s head section:

<script type="text/javascript">
var TotalChkBx;
var Counter;

window.onload = function()
   //Get total no. of CheckBoxes in side the GridView.
   TotalChkBx = parseInt('<%= this.gvCheckboxes.Rows.Count %>');

   //Get total no. of checked CheckBoxes in side the GridView.
   Counter = 0;

function HeaderClick(CheckBox)
   //Get target base & child control.
   var TargetBaseControl = 
       document.getElementById('<%= this.gvCheckboxes.ClientID %>');
   var TargetChildControl = "chkBxSelect";

   //Get all the control of the type INPUT in the base control.
   var Inputs = TargetBaseControl.getElementsByTagName("input");

   //Checked/Unchecked all the checkBoxes in side the GridView.
   for(var n = 0; n < Inputs.length; ++n)
      if(Inputs[n].type == 'checkbox' && 
                Inputs[n].id.indexOf(TargetChildControl,0) >= 0)
         Inputs[n].checked = CheckBox.checked;

   //Reset Counter
   Counter = CheckBox.checked ? TotalChkBx : 0;

function ChildClick(CheckBox, HCheckBox)
   //get target control.
   var HeaderCheckBox = document.getElementById(HCheckBox);

   //Modifiy Counter; 
   if(CheckBox.checked && Counter < TotalChkBx)
   else if(Counter > 0) 

   //Change state of the header CheckBox.
   if(Counter < TotalChkBx)
      HeaderCheckBox.checked = false;
   else if(Counter == TotalChkBx)
      HeaderCheckBox.checked = true;

In the above script, there are two global variables: TotalChkBx and Counter. These are initialised in the window.onload event. There are two methods: HeaderClick and ChildClick. The method HeaderClick checks / unchecks all checkboxes of a particular column inside the GridView depending upon whether the header checkbox is checked or unchecked. The method ChildClick checks / unchecks the header checkbox depending upon whether all checkboxes of a particular column inside the GridView are checked or unchecked.

Just download the sample application and enjoy coding! I hope you will like this article.

Supported browsers

I have tested this script on the following browsers:



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


About the Author

Technical Lead Infogain India Pvt Ltd
India India

Samir NIGAM is a Microsoft Certified Professional. He is an insightful IT professional with results-driven comprehensive technical skill having rich, hands-on work experience n web-based applications using ASP.NET, C#, AJAX, Web Service, WCF, jQuery, Microsoft Enterprise Library , LINQ, MS Entity Framework, nHibernate, MS SQL Server & SSRS.

He has earned his master degree (MCA) from U.P. Technical University, Lucknow, INDIA, his post graduate dipoma (PGDCA ) from Institute of Engineering and Rural Technology, Allahabad, INDIA and his bachelor degree (BSc - Mathematics) from University of Allahabad, Allahabad, INDIA.

He has good knowledge of Object Oriented Programming, n-Tier Architecture, SOLID Principle, and Algorithm Analysis & Design as well as good command over cross-browser client side programming using JavaScript & jQuery,.


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Comments and Discussions

QuestionThank you!!! Pin
sandy03441-Mar-16 9:33
membersandy03441-Mar-16 9:33 
Questionnested grid view Pin
Member 1021767823-Apr-15 22:05
memberMember 1021767823-Apr-15 22:05 
QuestionPerfecto :) Pin
sanamshaikh2-Feb-15 10:46
membersanamshaikh2-Feb-15 10:46 
QuestionExcellent Pin
barsan10125-Jun-13 21:51
memberbarsan10125-Jun-13 21:51 
GeneralMy vote of 5 Pin
robzz212-Sep-12 23:02
memberrobzz212-Sep-12 23:02 
GeneralMy vote of 5 Pin
chetan virkar25-May-12 22:57
memberchetan virkar25-May-12 22:57 
GeneralMy vote of 5 Pin
bhaskarareddy4-May-12 2:35
memberbhaskarareddy4-May-12 2:35 
GeneralMy vote of 4 Pin
DTSFI14-Mar-12 2:22
memberDTSFI14-Mar-12 2:22 
GeneralMy vote of 2 Pin
califf2221-Jan-12 7:22
membercaliff2221-Jan-12 7:22 
GeneralThank You..nice Article Pin
Praveen kumar. Bhuvanagiri13-Jan-12 1:25
memberPraveen kumar. Bhuvanagiri13-Jan-12 1:25 
QuestionError in select all Pin
Soner Sari11-Jan-12 2:53
memberSoner Sari11-Jan-12 2:53 
GeneralThanks! Pin
yaroopig17-Nov-11 16:32
memberyaroopig17-Nov-11 16:32 
GeneralMy vote of 5 Pin
Manu K.Jayadev26-May-11 0:38
memberManu K.Jayadev26-May-11 0:38 
GeneralMy vote of 5 Pin
theintoehan10-Mar-11 19:26
membertheintoehan10-Mar-11 19:26 
GeneralMy vote of 5 Pin
ankurbhutani26-Feb-11 9:25
memberankurbhutani26-Feb-11 9:25 
GeneralMy vote of 5 Pin
Thrinath reddy25-Feb-11 1:28
memberThrinath reddy25-Feb-11 1:28 
GeneralMy vote of 5 Pin
jcrussell23-Feb-11 1:34
memberjcrussell23-Feb-11 1:34 
GeneralSlight Change Pin
jcrussell23-Feb-11 1:32
memberjcrussell23-Feb-11 1:32 
GeneralMy vote of 5 Pin
noblevaibhav4-Feb-11 7:04
membernoblevaibhav4-Feb-11 7:04 
GeneralMy vote of 5 Pin
akhilsingh.ims21-Sep-10 3:46
memberakhilsingh.ims21-Sep-10 3:46 
GeneralPb with value rows.count() Pin
gdoub12-Apr-10 4:38
membergdoub12-Apr-10 4:38 
Generalwell done Pin
Donsw18-Apr-09 11:34
memberDonsw18-Apr-09 11:34 
GeneralRe: well done Pin
Samir NIGAM14-Sep-09 2:35
memberSamir NIGAM14-Sep-09 2:35 
GeneralHelpful article Pin
Sanjay4India6-Apr-09 2:40
memberSanjay4India6-Apr-09 2:40 
GeneralRe: Helpful article Pin
Samir NIGAM14-Sep-09 2:36
memberSamir NIGAM14-Sep-09 2:36 

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