How to pass in Report Parameters into SSRS Report Viewer if parameters do not exist in the report?

Question

The follow code passes ReportParameters into SSRS report viewer to generate a report.

ReportParameter[] reportParameter = new ReportParameter[2];
reportParameter[0] = new ReportParameter("Parameter1", Parameter1);
reportParameter[1] = new ReportParameter("Parameter2", Parameter2);
ReportViewer1.ServerReport.SetParameters(reportParameter);
ReportViewer1.ServerReport.Refresh();

The following is a sample report with one of the parameters missing. I set the parameter "Parameter1" in this report.

Is there a way to programmatically make the C# code set the parameter to "none" if parameter is missing in the report and still generate the report?

As of now, the code will attempt to push the value for "Parameter2" into the report but since that parameter has not been set in the report, the report will not generate.

Answer 1

The solution was to use the GetParameter() to check for the existing parameters in the report and then generate the list of parameters using some conditional statements, and then setting those parameters with SetPrameters().

var currentParametersInTheReport = ReportViewer1.ServerReport.GetParameters();

List<ReportParameter> systemReportParameter = new List<ReportParameter>();
if (currentParametersInTheReport.Any(r => r.Name == "Parameter1"))
{
    systemReportParameter.Add(new ReportParameter("Parameter1", Parameter1));
}
if (currentParametersInTheReport.Any(r => r.Name == "Parameter2"))
{
    systemReportParameter.Add(new ReportParameter("Parameter2", Parameter2));
}

ReportViewer1.ServerReport.SetParameters(systemReportParameter);
ReportViewer1.ServerReport.Refresh();

This approach will check for the parameters first, then build the list of parameters to send to the ReportViewer component, and then send those parameters to generate the report.