Select first option in param

[Justin Lee]

Hello.  I have a report with 2 params.  The datasource of the second param uses the selected value of the first param. 
Example:    Param 1 is a list of car manufactures, and Param 2 is a list of Models for the selected car manufacture.

I have set this up, and it is working correctly.  However, what I would like to do is have Param 2 automatically select the first option after the user selects from Param1.
Example:  User chooses "Ford", and "Mustang" is automatically selected in Param 2 (because its the first in the list), and the Mustang report is displayed.  (Currently, after selecting from Param1, the dropdown for Param2 says "<select a value>")

How can I accomplish this?

Thanks,
Justin

[Steve]

Hi Justin Lee,

Unfortunately this is currently not possible as the depending parameter (the one that would refresh based on the main parameter) is evaluated only once. We would revisit the implementation and see what was the reason for this behavior and change it if applicable so that such scenario can be executed.

Sorry for the temporary inconvenience.

Greetings,
Steve
the Telerik team

[Patrick]

What we've had to do was to create a UI page, be it a web page or a windows form, that collected all the search criteria. In your example, that would be querying the user for the make and model of the car. All your logic is in that page/form. Such as selecting the first model of the selected car make. When the user clicks a button to view the report, create an instance of the appropriate report, set it's parameters in code and display the report. For example, I have a form that contains two dropdown lists. The first contains the names of the reports, hardcoded at this time. The second dropdown list contains the search criteria applicable to the report selected in the first. I'm using the SelectedIndexChanged() event handler of the first list to populate the second. In the Click() event handler of the button that displays the selected report, I have:

private void btnRunReport_Click(object sender, EventArgs e)

{

  int selectedIndex = this.cboReports.SelectedIndex;

  // if the report viewer is already bound to a report...

  if (this.reportViewer1.Report != null)

  {

    // release it

    this.reportViewer1.Report = null;

    this.reportViewer1.RefreshReport();

  }

  switch (selectedIndex)

  {

    case 0:   // General Fund Check Register report

      // create an instance of the report associated with the selected index

      Telerik.Reporting.Report generalFundCheckRegister = new APVenders.Reports.GeneralFundCheckRegister();

      // set the "writtenDate" report parameter to what's selected in the report criteria combobox

      generalFundCheckRegister.ReportParameters["writtenDate"].Value = this.cboReportCriteria.Text;

      // bind the report to the report viewer

      this.reportViewer1.Report = generalFundCheckRegister; 

      // display the report

      this.reportViewer1.RefreshReport();

      break;

    case 1:   // Monthly Check/Void Register report  

      Telerik.Reporting.Report monthlyCheckVoidRegister = new APVenders.Reports.MonthlyCheckVoidRegister();

      monthlyCheckVoidRegister.ReportParameters["accountingPeriod"].Value = this.cboReportCriteria.Text;

      this.reportViewer1.Report = monthlyCheckVoidRegister;

      this.reportViewer1.RefreshReport();

      break;

  }

 

}


That's probably not the answer you wanted, but it's one way to workaround the limitation your bumping up against. Hope that helps...