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Ticket T292280
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Update dashboard chart values dynamically

created 9 years ago

I want to update dashboard chart values at run time. How is this possible using JScript

JavaScript
customizePoint: function () {  

// return this.value * 10; //Something like this  
   }
Comments (2)
DevExpress Support Team 9 years ago

    Hi Neha,
    Would you please describe a specific use-case scenario. With that, we’ll be in a better position to describe the options available to you.

    NS NS
    Neha Soni 3 9 years ago

      I am creating a chart in dashboard. This chart is binded with a datasource statically.
      I am viewing dashboard using ASPxDashboardViewer. At run time i am getting a multiplying factor say(0.1). I want to multiply all chart values with this multiply factor. How to achieve this?

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      Answers approved by DevExpress Support

      created 9 years ago

      The simplest way to achieve this goal is to use a calculated field in the chart's data item. In this calculated field, you can multiple data source values by a dashboard parameter.
      Attached is a small sample project that illustrates this approach. In this project, I have used the following expression in the calculated field: "[ProductAmount] * [Rate]", where "[Rate]" is a parameter name. You can specify a parameter value via the code or via the Requesting Parameter Values Dialog.

      I have found an issue with this approach in server mode and created a separate ticket regarding this: Server Mode does not allows to use parameters in Calculated Fields

        Show previous comments (3)
        DevExpress Support Team 9 years ago

          You are welcome Neha.

          NS NS
          Neha Soni 3 9 years ago

            I also Want to prevent setting parameters on each callback in this event.

            DevExpress Support Team 9 years ago

              Hi Neha,
              This event fires each time ASPxDashboardViewer loads data from the data store. If you wish to specify a parameter only once when the dashboard is loaded for the first time, handle the  ASPxDashboardViewer.DashboardLoaded event in the same manner as the CustomParameters event:

              protected void ASPxDashboardViewer1_DashboardLoaded(object sender, DevExpress.DashboardWeb.DashboardLoadedWebEventArgs e)
                      {
                          e.Dashboard.Parameters.Where(param => param.Name == "Rate").First().Value = 3;
                      }

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