Setting Parameters in Crystal Reports .NET

Well, I missed the post about setting parameters. That was one of the puzzle pieces too and I got lazy and didn't post about it. Here it is.

Setting Parameters in Crystal Reports .NET

A number of methods out there use the CrystalReportViewer control to set parameters. That's great unless you need to export your report to PDF (or XLS or RTF). This is a code snippet I use, it comes from Business Objects tech support:

rptCount = New ReportDocument
rptCount.Load(Server.MapPath("reportname.rpt"))

''Get the collection of parameters from the report
crParameterFieldDefinitions = rptCount.DataDefinition.ParameterFields
''Access the specified parameter from the collection
crParameter1 = crParameterFieldDefinitions.Item("Param1")
crParameter2 = crParameterFieldDefinitions.Item(“Param2")

''Get the current values from the parameter field. At this point
''there are zero values set.
crParameter1Values = crParameter1.CurrentValues
crParameter2Values = crParameter2.CurrentValues

''Set the current values for the parameter field
crDiscrete1Value = New ParameterDiscreteValue
crDiscrete1Value.Value = Request.Form(“param1value“)

crDiscrete2Value = New ParameterDiscreteValue
crDiscrete2Value.Value = Request.Form(“param2value“)

''Add the first current value for the parameter field
crParameter1Values.Add(crDiscrete1Value)
crParameter2Values.Add(crDiscrete2Value)

''All current parameter values must be applied for the parameter field.
crParameter1.ApplyCurrentValues(crParameter1Values)
crParameter2.ApplyCurrentValues(crParameter2Values)