RadChart + Callback

[Robson L]

Hi, I have a page loading some radcharts dinamically.
I'm using javascript SetInterval to refresh the charts every 30 seconds by callback.
The series values in the radchart object are updated but the image of chart is not updated, someone has an example to help me?

thanks
Robson

[Giuseppe]

Hello Robson L,

Here is a sample code snippet that achieves the desired effect:

ASPX:

<asp:ScriptManager ID="ScriptManager1" runat="server" />
<telerik:RadCodeBlock ID="cb1" runat="server">

    <script type="text/javascript">
        function pageLoad() {
            window.setTimeout(refresh, 1000);
        }

        function refresh() {
            var ajaxPanel = $find("<%= RadAjaxPanel1.ClientID %>");
            ajaxPanel.ajaxRequest("");
        }
    </script>

</telerik:RadCodeBlock>
<telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" OnAjaxRequest="RadAjaxPanel1_AjaxRequest">
    <telerik:RadChart ID="RadChart1" runat="server">
    </telerik:RadChart>
</telerik:RadAjaxPanel>

C#:

private Random rand = new Random(DateTime.Now.Millisecond);

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        RadChart1.DataSource = new int[] { rand.Next(10, 100), rand.Next(10, 100), rand.Next(10, 100) };
        RadChart1.DataBind();
    }
}

protected void RadAjaxPanel1_AjaxRequest(object sender, AjaxRequestEventArgs e)
{
    RadChart1.DataSource = new int[] { rand.Next(10, 100), rand.Next(10, 100), rand.Next(10, 100) };
    RadChart1.DataBind();
}

Sincerely yours,
Manuel
the Telerik team

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