Get Parameter value from ReportViewer

[Former Member]

I am using Visual Studio 2010 with Crystal Report for .NET version 13.0.2000.0.  I have a Crystal Report Viewer Control as the only item on a page and I am opening a report where the Crystal Report Viewer Control prompts me for the parameters. 

My code to do this looks like this:

Protected Sub ViewReport(strReport As String)

        Dim crReportDocument As New CrystalDecisions.Web.CrystalReportSource

        crReportDocument.Report.FileName = strReport

        crReportDocument.ReportDocument.FileName = strReport

        Me.CrystalReportViewer1.ReportSource = crReportDocument

        Me.CrystalReportViewer1.EnableParameterPrompt = True

        'Me.CrystalReportViewer1.EnableDatabaseLogonPrompt = True

        Me.CrystalReportViewer1.EnableDatabaseLogonPrompt = False

        Me.CrystalReportViewer1.ToolPanelView = CrystalDecisions.Web.ToolPanelViewType.None

        'Me.CrystalReportViewer1.LogOnInfo(0).ConnectionInfo.UserID = "userid"

        'Me.CrystalReportViewer1.LogOnInfo(0).ConnectionInfo.Password = "password"

         For i As Integer = 0 To Me.CrystalReportViewer1.LogOnInfo.Count - 1

            Select Case Me.CrystalReportViewer1.LogOnInfo(i).ConnectionInfo.ServerName.ToLower

                Case "prod"

                    Me.CrystalReportViewer1.LogOnInfo(i).ConnectionInfo.UserID = "prod"

                    Me.CrystalReportViewer1.LogOnInfo(i).ConnectionInfo.Password = "password"

                Case "test"

                    Me.CrystalReportViewer1.LogOnInfo(i).ConnectionInfo.UserID = "test"

                    Me.CrystalReportViewer1.LogOnInfo(i).ConnectionInfo.Password = "password"

                Case Else

                    Me.CrystalReportViewer1.EnableDatabaseLogonPrompt = True

            End Select

        Next

Session("ReportDoc") = crReportDocument

     End Sub

This all works wonderfully.  It prompts me for my parameters, I enter them and it displays the report. 

However, I now need to be get the parameter value that the user entered when they were prompted, and the name of the parameter too.  I have tried the following which will give me the parameter names, but I cannot get the value to display.  It always errors at the point in red below, when it is trying to get the current value. Can someone please help?

   Private Sub GetParams()

        Dim ReportDoc = CType(Session("ReportDoc"), CrystalDecisions.Web.CrystalReportSource)

        Dim ParamDef As CrystalDecisions.CrystalReports.Engine.ParameterFieldDefinitions

        ParamDef = ReportDoc.ReportDocument.DataDefinition.ParameterFields

        For Each Param As CrystalDecisions.CrystalReports.Engine.ParameterFieldDefinition In ParamDef

            Dim CurVal As CrystalDecisions.Shared.ParameterValues

            CurVal = Param.CurrentValues

            Dim DesVal As CrystalDecisions.Shared.ParameterDiscreteValue

            Debug.WriteLine("Parameter Name:  " & Param.Name)

            DesVal = CurVal.Item(0)

            Debug.WriteLine(Param.Name & ":" & DesVal.Value)

        Next

    End Sub

Thank you in advance,

Andrew

[Former Member · Accepted solution]

Try this ,

            crReportDocument= New ReportDocument

            crReportDocument.Load(Server.MapPath("Reportname.rpt"))

            crReportDocument.SetParameterValue("Report Parameter Name ", Param.Name)

            CrystalReport.HasToggleParameterPanelButton = False

            CrystalReport.ToolPanelView = ToolPanelViewType.None

            CrystalReport.ReportSource = crReportDocument

[Former Member · Accepted solution]

Thank you for responding....

However, I don't want to set my parameters via code.  I want to let the Crystal Report Viewer Control prompt the user and let them fill in the values, but I want to collect the values they enter so that I can place them into a table for audit purposes.

My main issue is that when I try to get the parameters they enter the currentvalues property of ParameterFieldDefinition is always empty even though I just entered a value for this parameter via the prompt.

Thanks,

[former_member188030 · Accepted solution]

Hi Andrew,

I suggest you develop your own custom parameter prompt before the actual CR parameter prompt, let the users enter the values in the custom prompt built by you, which you can easily gather and store in the DB. then pass those values entered by the user to the report through code.

Hope this helps,

Bhushan

[former_member183750 · Accepted solution]

I agree with Andrew. I don't see any APIs exposed off of the viewer that would let you do a Get on the entered parameters.

See:

SAP Crystal Reports .NET API Guide

SAP Crystal Reports .NET SDK Developer Guide

- Ludek

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[Former Member]

I guess I will go the route of building my own parameter prompts.

Thanks to everyone who responded.

-Andrew