Check Uncheck all items in ASP.Net CheckBoxList using jQuery

<asp:CheckBox ID="chkAll" Text="Select All" runat="server" />

<asp:CheckBoxList ID="chkFruits" runat="server">

    <asp:ListItem Text="Mango" />

    <asp:ListItem Text="Apple" />

    <asp:ListItem Text="Banana" />

    <asp:ListItem Text="Pineapple" />

    <asp:ListItem Text="Guava" />

    <asp:ListItem Text="Grapes" />

    <asp:ListItem Text="Papaya" />

</asp:CheckBoxList>

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>

<script type="text/javascript">

    $(function () {

        $("[id*=chkAll]").bind("click", function () {

            if ($(this).is(":checked")) {

                $("[id*=chkFruits] input").attr("checked", "checked");

            } else {

                $("[id*=chkFruits] input").removeAttr("checked");

            }

        });

        $("[id*=chkFruits] input").bind("click", function () {

            if ($("[id*=chkFruits] input:checked").length == $("[id*=chkFruits] input").length) {

                $("[id*=chkAll]").attr("checked", "checked");

            } else {

                $("[id*=chkAll]").removeAttr("checked");

            }

        });

    });

</script>

Reference:

http://aspsnippets.com/Articles/Check-Uncheck-all-items-in-ASPNet-CheckBoxList-using-jQuery.aspx