Accordion SelectedIndex behind code of last item selected?

问题

is it possible in behind code to set the SelectedIndex of an accordion to the same Index of what the user just click?

回答1:

    Accordion.SelectedIndex = -1;
    Accordion.RequireOpenedPane = false;

回答2:

My Solution:

Set a cookie on SelectedIndexChanged using javascript
Read the cookie on the page load event
Set the SelectedIndex

At the top of your page, using accordion control ID Accordion1:

<script type="text/javascript" language="javascript">        
function createCookie(name, value, days) {
        if (days) {
            var date = new Date();
            date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
            var expires = "; expires=" + date.toGMTString();
        } else var expires = "";
        document.cookie = escape(name) + "=" + escape(value) + expires + "; path=/";
    }

    function readCookie(name) {
        var nameEQ = escape(name) + "=";
        var ca = document.cookie.split(';');
        for (var i = 0; i < ca.length; i++) {
            var c = ca[i];
            while (c.charAt(0) == ' ') c = c.substring(1, c.length);
            if (c.indexOf(nameEQ) == 0) return unescape(c.substring(nameEQ.length, c.length));
        }
        return null;
    }

    function pageLoad() {
        var current_path = window.location.pathname.split('/').pop();
        console.log('current path:'+current_path);
        $find('Accordion1_AccordionExtender').add_selectedIndexChanged(onAccordionPaneChanged);

        var idx = readCookie('a_index');

        changeSelected(idx);
        $find('Accordion1_AccordionExtender').set_TransitionDuration(50);
    }

    // expand given accordion pane
    function changeSelected(idx) {

        $find('Accordion1_AccordionExtender').set_SelectedIndex(idx);

    }
    function onAccordionPaneChanged(sender, eventArgs) {
        var selPane = sender.get_SelectedIndex();
        // alert('You selected Pane ' + selPane);
        createCookie('a_index', selPane, 1);

    }
</script>

In the code behind:

 Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        Dim si As String = String.Empty 'selected index 

        If Request.Cookies("a_index") IsNot Nothing Then

            si = Request.Cookies("a_index").Value

            If si <> String.Empty Then
                Accordion1.SelectedIndex = si
            End If

        End If

    End Sub

来源：https://stackoverflow.com/questions/8188488/accordion-selectedindex-behind-code-of-last-item-selected

标签

ASP.NET

accordion