check checkbox is checked or not in javascript in asp.net

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Hi all, I am new to asp.net and trying to learn it,

I have created a simple page including a button and a checkboxes.

how to check checkbox is checked or not in javascript in asp.net

Posted 19-Sep-13 2:11am

ankit kumar from RIT

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4 solutions

Solution 2

Hi,
You can do it like this,

JavaScript

<script>
function checkcheckbox()
{
      //say for example you have checkbox with id="chk"
      var value = document.getElementById("<%= chk.ClientID %>").checked;
      // now value will have true or false. If true that means checkbox is checked and if value is false, that means checkbox is unchecked.
}
</script>

Hope it helps you.

Posted 19-Sep-13 2:19am

Harshil_Raval

v2

Solution 4

<script type="text/javascript">
        var hide1 = true;
        

        function hideColumn1(tableId, colIndex) {
            var table = document.getElementById(tableId);

            if (table != null) {
                for (i = 0; i < table.rows.length; i++) {
                    if (hide1)
                        table.rows[i].cells[colIndex - 1].style.display = 'none';
                    else
                        table.rows[i].cells[colIndex - 1].style.display = '';
                }
                hide1 = !hide1;
            }
    </script>

<asp:repeater id="rpt" runat="server" >

       <headertemplate>
        <table  id="myTable" >
          <tr>
                <th >
                </th>
                  <th >
                </th>
                 .
                 .
                 .
        </tr>
           </table></headertemplate></asp:repeater>

<input id="Checkbox1" type="checkbox"  önclick="hideColumn1('myTable', 1)"  runat="server" checked="checked" />
<input id="Checkbox1" type="checkbox"  önclick="hideColumn1('myTable', 2)"  runat="server" checked="checked" />
<input id="Checkbox1" type="checkbox"  önclick="hideColumn1('myTable', 3)"  runat="server" checked="checked" />
.
.
.

Posted 19-Sep-13 21:50pm

ankit kumar from RIT

Updated 19-Sep-13 22:26pm

v3

Solution 1

It's the easiest way you can go for

when-checkbox-is-checked-show-message-in-javascript[^]

Posted 19-Sep-13 2:16am

codestar007

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Thomas ktg · Accepted Answer · 2013-09-19T02:27:00

This is the simple javascript code to get the status of checkbox.

C#

var chkStatus1 = document.getElementById("chkbutton1");
var chkStatus2 = document.getElementById("chkbutton2");

if (chkStatus1.checked) {
    // do your implementation for if part
}
else if(chkStatus2.checked) 
{
   // do your implementation for else if part for checkbox2
}
else if(chkStatus2.checked && chkStatus2.checked)
{
   // do your implementation when two chechbox status is checked.
}
else
{
   // do your implementation for else part.
}