select all checkboxes using javascript?

ajay raju

16y2.8k.NET

hi,
i am taking one datagrid in that grid i am taking checkboxes and out side of the datagrid i am taking 2 html buttons i.e., Select All and Select None.

if i am click on select all button then all check boxes are selected and if i click select none button all checkboxes are unchecked

how to write javascript function todo this. please give a sample code for this.

Thanks

2 Replies

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Shankey16y ago
Accepted answer
Hi ajay raju,

Following is your solution and please mark my answer as accepted if it helped you:)

Step1: Call "MarkUnmarkMessages(true);" function on click of select all button and call    "MarkUnmarkMessages(false);" function on click of select none.

Step2: Add following script.
function MarkUnmarkMessages(ischeck)
{
           var grid = document.getElementById(<%=yourgrid.ClientID%>);
            var Msg = grid.getElementsByTagName('input');
            for (var m = 0; m < Msg.length; m++)
            {
                if (Msg[m].type == 'checkbox')
               {
                    Msg[m].checked = ischeck;

                }
            }
         }
ajay raju16y ago
Thank you Maninder. your code is very helpful for me.