Reacting to a change in a RadChart

6 posts, 0 answers
  1. FIMS Computing Services FIMS - UWO
    FIMS Computing Services FIMS - UWO avatar
    16 posts
    Member since:
    Dec 2005

    Posted 21 Aug 2013 Link to this post

    Hello,
    I'm trying to make a Chart change its displayed info according to what data is displayed in a RadGrid after a filter is used. Allowing for a user to view the data in 2 forms.

    Example:  When first loading the page the grid contains 96 results and the chart displays the data accordingly with a total of 96 as well.  However, once a user were to use a filter (such as only wanting to see usernames that contain the letter 'z') and hits enter the grid changes to only display 3 results but the chart still displays 96 from its original view.

    What is the correct way of accomplishing this task?  I've attempted several events from the grid:
    - OnItemCommand()
    - OnItemDataBound()

    As well as Chart methods like PreRender()

    I've been able to hold the required data the Chart should display in a list but it just won't refresh like the Grid does when a filter is used.
    Any ideas?
  2.
  3. Barbaros Saglamtimur
    Barbaros Saglamtimur avatar
    110 posts
    Member since:
    Jul 2012

    Posted 22 Aug 2013 Link to this post

    Don't they share same type of data source? In my case they share same type, and I bind data to radchart after radgrid databound.There are other solution but this was the easiest way for me.
    protected void RadGrid1_DataBound(object sender, EventArgs e)
    {
        List<IsletmeRaporu> theBoundData = (List<IsletmeRaporu>)RadGrid1.DataSource;
        RadHtmlChart1.DataSource = theBoundData;
        RadHtmlChart1.DataBind();
    }
    Hope this helps.
  5. FIMS Computing Services FIMS - UWO
    FIMS Computing Services FIMS - UWO avatar
    16 posts
    Member since:
    Dec 2005

    Posted 22 Aug 2013 Link to this post

    I get the data correct sure when debug/seeing the contents of the chart.  

    The issue however is, even in the databound() event of the grid.  The chart won't update its image, such as Bar A saying 517 but should be significantly lower after a filter search.  The grid updates and shows the lower number of results but the chart doesnt.  It's simply the issue of postback/refreshing the page after the filter I am having an issue with.
  7. Barbaros Saglamtimur
    Barbaros Saglamtimur avatar
    110 posts
    Member since:
    Jul 2012

    Posted 23 Aug 2013 Link to this post

    It's interesting. I use exactly same code as I mentioned and works fine (both grid and chart is on an update panel). Which version of radcontrols are you using?
  8.
  9. FIMS Computing Services FIMS - UWO
    FIMS Computing Services FIMS - UWO avatar
    16 posts
    Member since:
    Dec 2005

    Posted 23 Aug 2013 Link to this post

    My Telerik.Web.UI.dll version is 2013.2.611.45

    What about your auto postback settings?  It sounds like your code should be all that's required but I guess their may be something really small that is enabled/disabled that's causing the difference.
  11. Barbaros Saglamtimur
    Barbaros Saglamtimur avatar
    110 posts
    Member since:
    Jul 2012

    Posted 26 Aug 2013 Link to this post

    I trigger update panel with with javascript. Both grid and chart call same function, which updates a hiddenfield's value. On post back I read hiddenfield's value and refresh datasource.
    Here is my js
    function refresh(sn, c) {
        var hiddenField = $get("HiddenField1");
        if (hiddenField) {
            hiddenField.value = sn + "|" + c;
            setTimeout(function () { __doPostBack(hiddenField.id, ''); }, 100);
        }
    }

    Adding the caller function to grid's hyperlinkcolumn
    protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
            {
                if (e.Item is GridDataItem)
                {
            GridDataItem item = (GridDataItem)e.Item;
                    HyperLink hyplnkQn = (HyperLink)item["textColumn"].Controls[0];
            ...
            ...
            string clickTxt = string.Format("refresh('{0}','{1}');", sn, di.Text);
                    hyplnkQn.Attributes.Add("onclick", clickTxt);
             }
        }

    And chart
    <telerik:RadHtmlChart ID="RadHtmlChart1" runat="server" Width="650px" Height="550px"
                                OnClientSeriesClicked="OnClientSeriesClicked">
    function OnClientSeriesClicked(sender, args) {
        var c = args.get_category();
        var sn = args.get_seriesName();
        refresh(sn, c);
    }

    Hope this helps.

    By the way I am using version 2013.2.806.40
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