How to pass a Report Parameter using C# in Web Application.

[britzer]

I tried all the possible combination of codes, and spending almost half of the day searching over the internet but it doesn't work everything, i need help.

Code 1:

string sFrom = Request.QueryString["From"].ToString()  +" 00:00:00";
        string sTo = Request.QueryString["To"].ToString() +" 23:59:59";

        ReportDocument cryRpt = SalesPrRegion.ReportDocument;

          
        cryRpt.SetParameterValue(0, Convert.ToDateTime(sTo));
        cryRpt.SetParameterValue(1, Convert.ToDateTime(sFrom));
        cryRpt.SetDatabaseLogon("sa", "sa"); 
        
        CrystalReportViewer1.ReportSource = cryRpt;
        
           
        CrystalReportViewer1.RefreshReport();

Code 2:

string sFrom = Request.QueryString["From"].ToString()  +" 00:00:00";
        string sTo = Request.QueryString["To"].ToString(); // +" 23:59:59";
         
        ReportDocument cryRpt = new ReportDocument();
            cryRpt.Load(Server.MapPath("SalesPrRegion.rpt"));

            ParameterFieldDefinitions crParameterFieldDefinitions ;
            ParameterFieldDefinition crParameterFieldDefinition ;
            ParameterValues crParameterValues = new ParameterValues();
            ParameterDiscreteValue crParameterDiscreteValue = new ParameterDiscreteValue();

            crParameterDiscreteValue.Value = Convert.ToDateTime(sFrom);
            crParameterFieldDefinitions = cryRpt.DataDefinition.ParameterFields;
            crParameterFieldDefinition = crParameterFieldDefinitions[0];
            crParameterValues = crParameterFieldDefinition.CurrentValues;

            crParameterValues.Clear();
            crParameterValues.Add(crParameterDiscreteValue);
            crParameterFieldDefinition.ApplyCurrentValues(crParameterValues);

            crParameterDiscreteValue.Value = Convert.ToDateTime(sTo);
            crParameterFieldDefinitions = cryRpt.DataDefinition.ParameterFields;
            crParameterFieldDefinition = crParameterFieldDefinitions[1];
            crParameterValues = crParameterFieldDefinition.CurrentValues;

            crParameterValues.Clear();
            crParameterValues.Add(crParameterDiscreteValue);
            crParameterFieldDefinition.ApplyCurrentValues(crParameterValues);

            cryRpt.SetDatabaseLogon("sa", "sa"); 
            CrystalReportViewer1.ReportSource = cryRpt;
        
           
        CrystalReportViewer1.RefreshReport();