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Select/Deselect all Checkboxes at Server side in ASP.NET using C#

Posted by Sushmita Kumari Articles | ASP.NET Programming January 11, 2006
In this article we will see that how to select/deselect all checkboxes using C#.net server side code inspite of simple Javascript code.
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Introduction:-

Some time we come across with the scenario where we need the function to select\deselect the checkboxes
from the server side code.The following code is going to describe the scenarion where we have one Panal Control which is having the multiple checkboxe

Refer the following link to know how to add dyanamic checkboxes to Panal in ASP.NET using C#.

How to generate Dynamic Checkbox in ASP.Net using C#

Code sample :-

//Drag and drop a panal control in asp.net web page

//Following will be the auto generated code with user defind controlName

protected System.Web.UI.WebControls.Panel PnlTimeExpence;

//Decleare one checkbox object

CheckBox chkList1;

//write a code to add dyanamic checkboxes

..
..

..     //code to add dyanamic controls(checkboxes). Check link above for adding dynamic checkboxes.

..

..

//Now we have a Panel control ready with multiple checkboxes.

//Fuction to select\Deselect checkboxes

          private void SelectAllCheckBoxControls(Control parent,bool checkedVal)

            {

            try

                {

                string strLeave=string.Empty;

                foreach (Control child in parent.Controls)

                    {

                    if (child.GetType().ToString().Equals("System.Web.UI.WebControls.CheckBox"))

                        {

                        CheckBox chk = (CheckBox)child;

                        chk.Checked=checkedVal;

                        }

                    }

                }

             catch(Exception exp)

                {

                throw new Exception("SelectAllCheckBoxControls  " + exp.Message);

                }

            }

        //Generate event on which we want to perform the select\deselect operation

          //Following code is using a checkbox control to select \deselect the Event

        private void chkReport_CheckedChanged(object sender, System.EventArgs e)

            {

            try

                {

                //Calling a userdefind function

                SelectAllCheckBoxControls(PnlTimeExpence,chkReport.Checked);

                }

                catch(Exception exp)

                {

                throw new Exception("chkReport_CheckedChanged  " + exp.Message);

                }

            }

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