问如何在单个asp.net按钮单击事件中选中所有asp.net复选框？

EN

var $checkboxes = $('input[type=checkbox]');
$('#check').toggle(function() {
    $checkboxes.attr('checked', 'checked');
    return false;

}, function() {
    $checkboxes.removeAttr('checked');
    return false;
});

<asp:Panel ID="Panel1" runat="server">

    <asp:CheckBox ID="CheckBox1" runat="server" />
    <asp:CheckBox ID="CheckBox2" runat="server" />
    <asp:CheckBox ID="CheckBox3" runat="server" />

</asp:Panel>
<asp:Button Text="click" ID="Button1" runat="server" onclick="Button1_Click" />

protected void Button1_Click(object sender, EventArgs e) {

    foreach (Control c in Panel1.Controls) {

        if (c is CheckBox) {

            (c as CheckBox).Checked = true;
        }

    }
}

Protected Sub Button1_Click(sender As Object, e As EventArgs)

    For Each c As Control In Panel1.Controls

        If TypeOf c Is CheckBox Then

            TryCast(c, CheckBox).Checked = True

        End If
    Next
End Sub

    protected void Button1_Click(object sender, EventArgs e) {

        foreach (Control c in Panel1.Controls) {

            if (c is CheckBox) {

                if ((c as CheckBox).Checked) {

                    (c as CheckBox).Checked = false;

                } else {

                    (c as CheckBox).Checked = true;
                }
            }

        }
    }

Protected Sub Button1_Click(sender As Object, e As EventArgs)

    For Each c As Control In Panel1.Controls

        If TypeOf c Is CheckBox Then

            If TryCast(c, CheckBox).Checked Then


                TryCast(c, CheckBox).Checked = False
            Else

                TryCast(c, CheckBox).Checked = True
            End If

        End If
    Next
End Sub

<asp:Button ID="myToggleButton" runat="server" Text="Toggle Checkboxes" />

$('[id$="myToggleButton"]').click(function(){
    $('input:checkbox')
         .filter(':checked')
         .attr('checked',false)
         .end()
         .not(':checked')
         .attr('checked',true)
         ;        
});