how to Pass Parameter to Subreports Programatically in C#

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C#

CrystalReports

hi i am trying to pass parameter to sub report. i can pass parameter form main report by using following code. but can not pass parameter using following code in sub report. please guide me.
thanks in advance.

blancesheetfinal cryRpt = new blancesheetfinal();

            crinfo.IntegratedSecurity = true;

            TableLogOnInfos crLoginfos = new TableLogOnInfos();
            TableLogOnInfo crLoginfo = new TableLogOnInfo();
            Tables Crtables;
            Crtables = cryRpt.Database.Tables;

            foreach (Table crtable in Crtables)
            {
                crLoginfo = crtable.LogOnInfo;
                crLoginfo.ConnectionInfo = crinfo;
                crtable.ApplyLogOnInfo(crLoginfo);
            }
            /////// for first parameter feild
            ParameterFieldDefinitions crParameterFieldDefinitions;
            ParameterFieldDefinition crParameterFieldDefinition;
            ParameterValues crParameterValues = new ParameterValues();
            ParameterDiscreteValue crParameterDiscreteValue = new ParameterDiscreteValue();

            crParameterDiscreteValue.Value = textBox1.Text;
            crParameterFieldDefinitions = cryRpt.DataDefinition.ParameterFields;
            crParameterFieldDefinition = crParameterFieldDefinitions["cid"];
            crParameterValues = crParameterFieldDefinition.CurrentValues;

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

            ///////// parameter for sub report 
            
            ParameterFieldDefinitions ccrParameterFieldDefinitions;
            ParameterFieldDefinition ccrParameterFieldDefinition;
            ParameterValues ccrParameterValues = new ParameterValues();
            ParameterDiscreteValue ccrParameterDiscreteValue = new ParameterDiscreteValue();

            //ccrParameterDiscreteValue.Value = textBox1.Text;
            ccrParameterDiscreteValue.Value = dateTimePicker1.Text;
            ccrParameterFieldDefinitions = cryRpt.DataDefinition.ParameterFields;
            ccrParameterFieldDefinition = ccrParameterFieldDefinitions["date"];
            ccrParameterValues = ccrParameterFieldDefinition.CurrentValues;

            ccrParameterValues.Clear();
            ccrParameterValues.Add(ccrParameterDiscreteValue);
            ccrParameterFieldDefinition.ApplyCurrentValues(ccrParameterValues);
            crystalReportViewer1.ReportSource = cryRpt;
            crystalReportViewer1.Refresh(); 
           
            crystalReportViewer1.ReportSource = cryRpt;
crystalReportViewer1.Refresh();