Question

This is how my table structure looks,

 <table>
    <tbody>   
    <tr>
    <td id="**SelectCheckBox**" class="helpBod">
    <input id="TimeSheetWebUserControl1_TimeSheetRepeater_ctl01_CheckBox0" type="checkbox"  name="TimeSheetWebUserControl1$TimeSheetRepeater$ctl01$CheckBox0"/>
    </td>
    <td>
    </td>
    </tr>
    <tr>
    <td id="**SelectCheckBox**" class="helpBod">
    <input id="TimeSheetWebUserControl1_TimeSheetRepeater_ctl02_CheckBox1" type="checkbox"  name="TimeSheetWebUserControl1$TimeSheetRepeater$ctl02$CheckBox1"/>
    </td>
   <td>
    </td>
    </tr>
    <tr>
    </tbody>
</table>

I have a button SelectAll im going to call a jquery function to check mark all the checkbox

function look this

function jqCheckAll() {
        $("td#" + 'SelectCheckBox' + 'input:checkbox').attr('checked', true);

      }

problem is this will check mark only only checkbox what if i have 100 checkbox, i want to check mark all the this 100 checkbox on click of select all button.

Answer 1

@sameer, what you want to do is add a class to all the checkboxes you want checked.
Here I added a class “checkall” to the checkboxes that will be checked.

<input type="button" name="checkit" id="checkit" value="Check All">

 <table>
    <tbody>   
    <tr>
    <td>
    <input type="checkbox" class="checkall" name="TimeSheetWebUserControl1$TimeSheetRepeater$ctl01$CheckBox0" id="TimeSheetWebUserControl1_TimeSheetRepeater_ctl01_CheckBox0" />
    </td>
    <td>
    <input type="checkbox" name="chk1" id="chk1" />
    </td>
    </tr>
    <tr>
    <td>
    <input type="checkbox" class="checkall" name="TimeSheetWebUserControl1$TimeSheetRepeater$ctl02$CheckBox1" id="TimeSheetWebUserControl1_TimeSheetRepeater_ctl02_CheckBox1" />
    </td>
    <td>
   <input type="checkbox" name="chk2" id="chk2" />
    </td>
    </tr>
    <tr>
    </tbody>
</table>

The jQuery is then simple.

$('#checkit').click(function() {
    $('input:checkbox.checkall').attr('checked','checked');
    return false;
});