trouble in passing parameter in crystal document

[aguest]

i am getting some trouble with a tutorial that i found on msdn web site : http://msdn.microsoft.com/en-us/library/ms227722.aspx. i would like to pass a parameter to my CrystalReport document,but i would like to send an integer value to my CR document and just one value(because in the tut its sending and array of string values). the code is the fellowing

Private Const PARAMETER_FIELD_NAME As String = "numb"

Private impbonrecepReport As ReportDocument

Private Sub ConfigureCrystalReports()


    Dim myArrayList As ArrayList = New ArrayList()

    myArrayList.Add(999)
    Dim numbrecep As Integer

    numbrecep = 999



    SetCurrentValuesForParameterField(impbonrecepReport, myArrayList)
   
    impbonrecepReport = New ReportDocument()
    Dim reportPath As String = Application.StartupPath & "\\" & "ImpBonReception.rpt"

    impbonrecepReport.Load(reportPath)
    CrystalReportViewer1.ReportSource = impbonrecepReport

End Sub

Private Sub SetCurrentValuesForParameterField(ByVal myReportDocument As ReportDocument, ByVal myArrayList As ArrayList)

    Dim currentParameterValues As ParameterValues = New ParameterValues()


    For Each submittedValue As Object In myArrayList

        Dim myParameterDiscreteValue As ParameterDiscreteValue = New ParameterDiscreteValue()
        myParameterDiscreteValue.Value = myArrayList.ToString()
        currentParameterValues.Add(myParameterDiscreteValue)

    Next


    Dim myParameterFieldDefinitions As ParameterFieldDefinitions = myReportDocument.DataDefinition.ParameterFields
    Dim myParameterFieldDefinition As ParameterFieldDefinition = myParameterFieldDefinitions(PARAMETER\_FIELD\_NAME)
    myParameterFieldDefinition.ApplyCurrentValues(currentParameterValues)


End Sub

i got this error message

An unhandled exception of type 'System.NullReferenceException' occurred in GestionStock.exe
Additional information: La référence d'objet n'est pas définie à une instance d'un objet.

in this line Dim myParameterFieldDefinitions As ParameterFieldDefinitions = myReportDocument.DataDefinition.ParameterFields can you help me to solve this problem? thank you ps: i am on VS2005 VB.NET

[tosch]

Move the call to SetCurrentValuesForParameterField to the line after loading the report. This should fix your problem.

Tosch

[aguest]

now i getting a message error in the next line Dim myParameterFieldDefinition As ParameterFieldDefinition = myParameterFieldDefinitions(PARAMETER_FIELD_NAME) this is the error message An unhandled exception of type 'System.Runtime.InteropServices.COMException' occurred in CrystalDecisions.CrystalReports.Engine.dll Additional information: Index non valide. (Exception de HRESULT : 0x8002000B (DISP_E_BADINDEX))

[tosch]

You're trying to get an item with the name PARAMETER_FIELD_NAME from your myParameterFieldDefinitions. Does it exist in the collection? Probably not, as the error says 'Index not valid'

Tosch

[aguest]

i fellowed the first part of this tutorial to set myParameterFieldDefinitions : LINK TO THE TUT and i have in my table(the table linked o the crystalReport Document) field called numb that i assigned it to PARAMETER_FIELD_NAME . and still dont know where is the error ???

[tosch]

Please loop through myParameterFieldDefinitions and check if any member is called numb (your fieldname). I'm not sure what the propertyname is, probably name or fieldname.

Tosch

[aguest]

I coudnt find any thing cause the error hapend in this line Dim myParameterFieldDefinition As ParameterFieldDefinition = myParameterFieldDefinitions(PARAMETER_FIELD_NAME) i looked for numb or name and fieldname but nothing ????

[tosch]

Please check the property ParameterFieldName. You may have to loop through all items in ParameterFieldDefinitions and check the value of ParameterFieldName. What are the values for this field?

Tosch

[aguest]

sorry to bother you with an other problem,but now that i moved at home and i working on my pc (OS:windows 7)i got an error message with the same code : An unhandled exception of type 'System.Exception' occurred in CrystalDecisions.CrystalReports.Engine.dll Additional information: Load report failed. on this line impbonrecepReport.Load(reportPath)

[tosch]

Does the report that you pass to the load function exist?

Tosch

[aguest]

i just found a property called ParamName and it's equal=Nothing. the other probelm happend with me when i work on windows 7 but when i worked with winXp i dont get this message error.

[aguest]

is that not normal that can be empty(ParamName=Nothing)? please can you give me a hand