CODEWITHSUNDEEP
javascriptc#asp.netpage-refresh
user7422837
user7422837

Reputation:

refresh page automatically, data is not updating

Hi guys so i am using javascript to update the page automatically every 5 seconds... But i have noticed the refresh is working but it is not updating my server side data... So the data grid should be updating and it is not... But if i press f5 then the data updates... here is my javascript in the markup.

<script>
    //refresh the page (without losing state)
    window.setTimeout('document.forms[0].submit()', 5000); 
</script>

(In the head) 

page load 

has all my data i need... 

  protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {

                if (DDLProduct.Items.Count == 0)
                {
                    BindDropDownList();
                }

                BizManager mgr = new BizManager();
                mgr.CalcShiftPeriod();

                //stores the bizmanager shiftstart to a backing field
                _shiftStart = mgr.Shiftstart; 
                _shiftEnd = mgr.Shiftend;

#if DEBUG
                //tests these values if program is in debug version.
                _shiftStart = new DateTime(2013, 08, 27, 6, 00, 00); 

                //dismisses if in release version
                _shiftEnd = new DateTime(2013, 08, 27, 13, 59, 59); 
#endif
                //passing in the params to the refreshdata method.
                RefreshData(Product,  _shiftStart, _shiftEnd);
            }
        }

So in essence the page is refreshing but the data is not unless i do a f5 refresh.

Upvotes: 0

Views: 1783

Answers (2)

ArunPratap
ArunPratap

Reputation: 5030

I don't know why you are Reloading your page in every 5 sec

answer by Esko will work for you but

You can also refresh through use of Meta Refresh like this

<head>
  <meta http-equiv="refresh" content="10">
</head>

I suggest you to do that like this:

<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>      
<asp:UpdatePanel runat="server" UpdateMode="Conditional">
    <ContentTemplate>
        <!-- your GridView in UpdatePanel -->
    </ContentTemplate>
    <Triggers>
        <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
    </Triggers> 
</asp:UpdatePanel>
<asp:Timer ID="Timer1" runat="server" Interval="2000" OnTick="Timer1_Tick"></asp:Timer>

Backend Code:

protected void Timer1_Tick(object sender, EventArgs e)
{
    // your code to refresh after some interval
}

Upvotes: 1

Esko
Esko

Reputation: 4207

You are not actually refreshin the page, but submitting the form, hence creating a postback. In your Page_Load, you don't refresh the data if it's postback.

Try changing the javascript to:

<script>
   window.setTimeout(function() {
         location.reload();
   }, 5000);
</script>

Upvotes: 5

Related Questions