CrystalDecisions.Shared.ParameterFields pfields = new CrystalDecisions.Shared.ParameterFields();
            CrystalDecisions.Shared.ParameterField pfield = new CrystalDecisions.Shared.ParameterField();
            CrystalDecisions.Shared.ParameterDiscreteValue disvalue = new CrystalDecisions.Shared.ParameterDiscreteValue();


            disvalue.Value = "This Is a Parameter Value";	// Parameter Value
            pfield.Name = "c1";		// Parameter Name

            pfield.CurrentValues.Add(disvalue);
            pfields.Add(pfield);

            crystalReportViewer1.ParameterFieldInfo = pfields;	//U must use crystalReportViewer

            crystalReportViewer1.ReportSource = @"G:\WindowsApplication1\WindowsApplication1\crpt.rpt";