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Problem passing parameter to crystal report subreport from *.aspx page
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on 09-16-2008 7:08 PM
Background:
I am developing a .NET web application using Visual Studio 2005. The code behind is in VB.net. One of my asp.net pages calls a report, which is invoked when the user clicks a Print button. I have developed this report using the Crystal Reports software that is bundled with Visual Studio 2005. I am passing one parameter from the asp.net page (utilizing the VB.net code-behind on the Print button) to the Crystal report. The report consists of a main report and 5 subreports. Both the main report and the subreports use the same parameter. Both the main report and the subreports are bound to stored procedures, each of which require a parameter.
Problem:
For some reason, the parameter is not being passed from the asp.net page to the report. I am receiving the following error: "CrystalDecisions.CrystalReports.Engine.ParameterField.CurrentValueException: Missing Parameter Values." However, when I remove the subreports, the parameter gets passed, and the report is invoked with no problem.
I have read in other forums that there may be an issue with the Crystal Reports software that is causing this problem. I have downloaded and run the suggested hotfix, but the problem remains unresolved. I have tried changing the linking of my main report to the subreport, but that doesn't help either. It is possible that I am doing something wrong with the linking, as this is the first time I have developed a report with Crystal Reports. I need a workaround or definitive solution. Below is the aspx code used to call the report:
Imports System
Imports System.Collections.Specialized
Imports System.Collections.ObjectModel
Imports System.Collections
Imports System.Text
Imports System.Configuration
Imports System.Data.SqlClient
Imports System.Data
Imports System.Data.SqlClient.SqlDataAdapter
Imports System.Web.Configuration
Imports Crystaldecisions.crystalreports.engine
Imports Crystaldecisions.reportsource
Imports Crystaldecisions.shared
Partial Class OACIS_Award_or_Deny_BudgetSummary_PrintRpt
Inherits System.Web.UI.Page
Dim paramFields As ParameterFieldDefinitions
Dim paramField As ParameterFieldDefinition
Dim paramValue As ParameterValues
Dim paramDiscreteValue As New ParameterDiscreteValue
Public Shared idCase, nameRpt As String
Private PrintRpt As ReportDocument
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Try
idCase = Request.QueryString("id")
nameRpt = Request.QueryString("prtName")
Dim config As Configuration = WebConfigurationManager.OpenWebConfiguration("~/")
Dim settings As AppSettingsSection = DirectCast(config.GetSection("appSettings"), AppSettingsSection)
Dim file As String = settings.File
Dim dSource, iCatalog, userIs, passUser, appString As String
dSource = Nothing
iCatalog = Nothing
userIs = Nothing
passUser = Nothing
appString = config.ConnectionStrings.ConnectionStrings("OacisConn").ToString()
Dim AppArray() As String = Split(appString, ";")
Dim arrayLgth As Integer = AppArray.Length
Dim i As Integer
For i = 0 To arrayLgth - 1
Dim pairIs() As String = Split(AppArray(i), "=")
Dim firstItem As String = pairIs(0)
Dim secondItem As String = pairIs(1)
If firstItem = "Data Source" Then : dSource = secondItem : End If
If firstItem = "Initial Catalog" Then : iCatalog = secondItem : End If
If firstItem = "UID" Then : userIs = secondItem : End If
If firstItem = "PWD" Then : passUser = secondItem : End If
Next
Dim crReportDocument As ReportDocument
Dim crExportOptions As ExportOptions
Dim crDiskFileDestinationOptions As DiskFileDestinationOptions
Dim crconnectioninfo As ConnectionInfo
Dim crDatabase As Database
Dim crtables As Tables
Dim crtable As Table
Dim crtablelogoninfo As TableLogOnInfo
Dim Fname As String
Dim Prtname As String
Dim FPath As String
Dim crSection As Section
Dim crReportObject As ReportObject
Dim crSubreportObject As SubreportObject
Dim subRepDoc As New ReportDocument
FPath = Server.MapPath("") + "\"
Dim rptIs As String = nameRpt
crReportDocument = New ReportDocument
Prtname = FPath
Prtname = Prtname + rptIs
crReportDocument.Load(Prtname)
Fname = "C:\WINDOWS\TEMP\" & Session.SessionID.ToString & ".pdf"
crconnectioninfo = New ConnectionInfo
crconnectioninfo.ServerName = dSource
crconnectioninfo.DatabaseName = iCatalog
crconnectioninfo.UserID = userIs
crconnectioninfo.Password = passUser
crDatabase = crReportDocument.Database
crtables = crDatabase.Tables
For Each crtable In crtables
Try
crtablelogoninfo = crtable.LogOnInfo
crtablelogoninfo.ConnectionInfo = crconnectioninfo
crtable.ApplyLogOnInfo(crtablelogoninfo)
crtable.SetDataSource(Prtname)
crtablelogoninfo.ConnectionInfo.DatabaseName = iCatalog
crtablelogoninfo.ConnectionInfo.UserID = userIs
crtablelogoninfo.ConnectionInfo.Password = passUser
crtable.ApplyLogOnInfo(crtablelogoninfo)
crtable.Location = iCatalog + ".dbo." + crtable.Name
Catch ex As Exception
Response.Write(ex)
Exit Sub
End Try
Next crtable
For Each crSection In crReportDocument.ReportDefinition.Sections
For Each crReportObject In crSection.ReportObjects
If crReportObject.Kind = ReportObjectKind.SubreportObject Then
crSubreportObject = CType(crReportObject, SubreportObject)
subRepDoc = crSubreportObject.OpenSubreport(crSubreportObject.SubreportName)
For Each crtable In subRepDoc.Database.Tables
Try
crtablelogoninfo = crtable.LogOnInfo
crtablelogoninfo.ConnectionInfo = crconnectioninfo
crtable.ApplyLogOnInfo(crtablelogoninfo)
crtable.SetDataSource(Prtname)
crtablelogoninfo.ConnectionInfo.DatabaseName = iCatalog
crtablelogoninfo.ConnectionInfo.UserID = userIs
crtablelogoninfo.ConnectionInfo.Password = passUser
crtable.ApplyLogOnInfo(crtablelogoninfo)
crtable.Location = iCatalog + ".dbo." + crtable.Name
Catch ex As Exception
End Try
Next
End If
Next
Next
crDiskFileDestinationOptions = New DiskFileDestinationOptions()
crDiskFileDestinationOptions.DiskFileName = Fname
crExportOptions = crReportDocument.ExportOptions
With crExportOptions
.DestinationOptions = crDiskFileDestinationOptions
.ExportDestinationType = ExportDestinationType.DiskFile
.ExportFormatType = ExportFormatType.PortableDocFormat
End With
Dim parIDCase As ParameterValues = New ParameterValues
Dim disIDCase As ParameterDiscreteValue = New ParameterDiscreteValue
disIDCase.Value = idCase
parIDCase.Add(disIDCase)
crReportDocument.DataDefinition.ParameterFields("@ID_CASE_NMBR").ApplyCurrentValues(parIDCase)
crReportDocument.Export()
Response.ClearContent()
Response.ClearHeaders()
Response.ContentType = "application/pdf"
Response.WriteFile(Fname)
Response.Flush()
Response.Close()
System.IO.File.Delete(Fname)
Catch ex As Exception
lblMessage.Visible = True
lblMessage.Text = "Error Load
" & Convert.ToString(ex)
End Try
End Sub
End Class
Your help is greatly appreciated!
- SAP Managed Tags:
- SAP Crystal Reports, version for Visual Studio
Accepted Solutions (1)
Accepted Solutions (1)
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Thanks for your help!
I've now gotten past the "missing parameter values" error, and the report renders fine in the report viewer. However, I've encounted another problem. The data in my main report displays correctly, but the data in my subreport does not display. Of course, when I view the report in the designer, both the main report and subreport display correctly. What am I doing wrong? Below is my vb.net code:
Try
idCase = Request.QueryString("id")
nameRpt = Request.QueryString("prtName")
Dim config As Configuration = WebConfigurationManager.OpenWebConfiguration("~/")
Dim settings As AppSettingsSection = DirectCast(config.GetSection("appSettings"), AppSettingsSection)
Dim file As String = settings.File
Dim dSource, iCatalog, userIs, passUser, appString As String
dSource = Nothing
iCatalog = Nothing
userIs = Nothing
passUser = Nothing
appString = config.ConnectionStrings.ConnectionStrings("OacisConn").ToString()
Dim AppArray() As String = Split(appString, ";")
Dim arrayLgth As Integer = AppArray.Length
Dim i As Integer
For i = 0 To arrayLgth - 1
Dim pairIs() As String = Split(AppArray(i), "=")
Dim firstItem As String = pairIs(0)
Dim secondItem As String = pairIs(1)
If firstItem = "Data Source" Then : dSource = secondItem : End If
If firstItem = "Initial Catalog" Then : iCatalog = secondItem : End If
If firstItem = "UID" Then : userIs = secondItem : End If
If firstItem = "PWD" Then : passUser = secondItem : End If
Next
Dim crReportDocument As ReportDocument
Dim crExportOptions As ExportOptions
Dim crDiskFileDestinationOptions As DiskFileDestinationOptions
Dim crconnectioninfo As ConnectionInfo
Dim crDatabase As Database
Dim crtables As Tables
Dim crtable As Table
Dim crtablelogoninfo As TableLogOnInfo
Dim Fname As String
Dim Prtname As String
Dim FPath As String
Dim crSection As Section
Dim crReportObject As ReportObject
Dim crSubreportObject As SubreportObject
Dim subRepDoc As New ReportDocument
FPath = Server.MapPath("") + "\"
Dim rptIs As String = nameRpt
crReportDocument = New ReportDocument
Prtname = FPath
Prtname = Prtname + rptIs
crReportDocument.Load(Prtname)
Fname = "C:\WINDOWS\TEMP\" & Session.SessionID.ToString & ".pdf"
crconnectioninfo = New ConnectionInfo
crconnectioninfo.ServerName = dSource
crconnectioninfo.DatabaseName = iCatalog
crconnectioninfo.UserID = userIs
crconnectioninfo.Password = passUser
crDatabase = crReportDocument.Database
crtables = crDatabase.Tables
For Each crtable In crtables
Try
crtablelogoninfo = crtable.LogOnInfo
crtablelogoninfo.ConnectionInfo = crconnectioninfo
crtable.ApplyLogOnInfo(crtablelogoninfo)
crtable.SetDataSource(Prtname)
crtablelogoninfo.ConnectionInfo.DatabaseName = iCatalog
crtablelogoninfo.ConnectionInfo.UserID = userIs
crtablelogoninfo.ConnectionInfo.Password = passUser
crtable.ApplyLogOnInfo(crtablelogoninfo)
crtable.Location = iCatalog + ".dbo." + crtable.Name
Catch ex As Exception
Response.Write(ex)
Exit Sub
End Try
Next crtable
For Each crSection In crReportDocument.ReportDefinition.Sections
For Each crReportObject In crSection.ReportObjects
If crReportObject.Kind = ReportObjectKind.SubreportObject Then
crSubreportObject = CType(crReportObject, SubreportObject)
subRepDoc = crSubreportObject.OpenSubreport(crSubreportObject.SubreportName)
For Each crtable In subRepDoc.Database.Tables
Try
crtablelogoninfo = crtable.LogOnInfo
crtablelogoninfo.ConnectionInfo = crconnectioninfo
crtable.ApplyLogOnInfo(crtablelogoninfo)
crtable.SetDataSource(Prtname)
crtablelogoninfo.ConnectionInfo.DatabaseName = iCatalog
crtablelogoninfo.ConnectionInfo.UserID = userIs
crtablelogoninfo.ConnectionInfo.Password = passUser
crtable.ApplyLogOnInfo(crtablelogoninfo)
crtable.Location = iCatalog + ".dbo." + crtable.Name
Catch ex As Exception
End Try
Next
End If
Next
Next
crDiskFileDestinationOptions = New DiskFileDestinationOptions()
crDiskFileDestinationOptions.DiskFileName = Fname
crExportOptions = crReportDocument.ExportOptions
With crExportOptions
.DestinationOptions = crDiskFileDestinationOptions
.ExportDestinationType = ExportDestinationType.DiskFile
.ExportFormatType = ExportFormatType.PortableDocFormat
End With
crReportDocument.SetParameterValue("@ID_CASE_NMBR", idCase)
crReportDocument.SetParameterValue("@ID_CASE_NMBR", idCase, "MemberName")
crReportDocument.Export()
Response.ClearContent()
Response.ClearHeaders()
Response.ContentType = "application/pdf"
Response.WriteFile(Fname)
Response.Flush()
Response.Close()
System.IO.File.Delete(Fname)
Catch ex As Exception
lblMessage.Visible = True
lblMessage.Text = "Error Load<br>" & Convert.ToString(ex)
End Try
Edited by: LaShandra Knox on Sep 17, 2008 7:59 PM
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I have a few comments for your code.
- If you want new data you should be calling the Refresh method after you Load the report. This will wipe out all parameters and records from the report.
- I am puzzled by your SetDataSource lines. I have no idea why you are passing the name of the report into the report itself. The SetDataSource is used to pass .NET DataSets, DataTables, DataReaders, etc. into a Crystal Report. Sending the file path of the report won't do anything.
- Why are you applying the LogOnInfo multiple times each pass? You should only do this once.
Try
idCase = Request.QueryString("id")
nameRpt = Request.QueryString("prtName")
Dim config As Configuration = WebConfigurationManager.OpenWebConfiguration("~/")
Dim settings As AppSettingsSection = DirectCast(config.GetSection("appSettings"), AppSettingsSection)
Dim file As String = settings.File
Dim dSource, iCatalog, userIs, passUser, appString As String
dSource = Nothing
iCatalog = Nothing
userIs = Nothing
passUser = Nothing
appString = config.ConnectionStrings.ConnectionStrings("OacisConn").ToString()
Dim AppArray() As String = Split(appString, ";")
Dim arrayLgth As Integer = AppArray.Length
Dim i As Integer
For i = 0 To arrayLgth - 1
Dim pairIs() As String = Split(AppArray(i), "=")
Dim firstItem As String = pairIs(0)
Dim secondItem As String = pairIs(1)
If firstItem = "Data Source" Then : dSource = secondItem : End If
If firstItem = "Initial Catalog" Then : iCatalog = secondItem : End If
If firstItem = "UID" Then : userIs = secondItem : End If
If firstItem = "PWD" Then : passUser = secondItem : End If
Next
Dim crReportDocument As ReportDocument
Dim crExportOptions As ExportOptions
Dim crDiskFileDestinationOptions As DiskFileDestinationOptions
Dim crconnectioninfo As ConnectionInfo
Dim crDatabase As Database
Dim crtables As Tables
Dim crtable As Table
Dim crtablelogoninfo As TableLogOnInfo
Dim Fname As String
Dim Prtname As String
Dim FPath As String
Dim crSection As Section
Dim crReportObject As ReportObject
Dim crSubreportObject As SubreportObject
Dim subRepDoc As New ReportDocument
FPath = Server.MapPath("") + "\"
Dim rptIs As String = nameRpt
crReportDocument = New ReportDocument
Prtname = FPath
Prtname = Prtname + rptIs
crReportDocument.Load(Prtname)
' New line of code here ... refresh the report
crReportDocument.Refresh()
Fname = "C:\WINDOWS\TEMP\" & Session.SessionID.ToString & ".pdf"
crconnectioninfo = New ConnectionInfo
crconnectioninfo.ServerName = dSource
crconnectioninfo.DatabaseName = iCatalog
crconnectioninfo.UserID = userIs
crconnectioninfo.Password = passUser
crDatabase = crReportDocument.Database
crtables = crDatabase.Tables
For Each crtable In crtables
Try
crtablelogoninfo = crtable.LogOnInfo
crtablelogoninfo.ConnectionInfo = crconnectioninfo
crtable.ApplyLogOnInfo(crtablelogoninfo)
' Why is this SetDataSource here? Prtname is not a DataSet or DataTable
'crtable.SetDataSource(Prtname)
' Why is this info being set again? ApplyLogOnInfo has already been done.
'crtablelogoninfo.ConnectionInfo.DatabaseName = iCatalog
'crtablelogoninfo.ConnectionInfo.UserID = userIs
'crtablelogoninfo.ConnectionInfo.Password = passUser
'crtable.ApplyLogOnInfo(crtablelogoninfo)
crtable.Location = iCatalog + ".dbo." + crtable.Name
Catch ex As Exception
Response.Write(ex)
Exit Sub
End Try
Next crtable
For Each crSection In crReportDocument.ReportDefinition.Sections
For Each crReportObject In crSection.ReportObjects
If crReportObject.Kind = ReportObjectKind.SubreportObject Then
crSubreportObject = CType(crReportObject, SubreportObject)
subRepDoc = crSubreportObject.OpenSubreport(crSubreportObject.SubreportName)
For Each crtable In subRepDoc.Database.Tables
Try
crtablelogoninfo = crtable.LogOnInfo
crtablelogoninfo.ConnectionInfo = crconnectioninfo
crtable.ApplyLogOnInfo(crtablelogoninfo)
' Why is this SetDataSource here? Prtname is not a DataSet or DataTable
'crtable.SetDataSource(Prtname)
' Why is this info being set again? ApplyLogOnInfo has already been done.
'crtablelogoninfo.ConnectionInfo.DatabaseName = iCatalog
'crtablelogoninfo.ConnectionInfo.UserID = userIs
'crtablelogoninfo.ConnectionInfo.Password = passUser
'crtable.ApplyLogOnInfo(crtablelogoninfo)
crtable.Location = iCatalog + ".dbo." + crtable.Name
Catch ex As Exception
End Try
Next
End If
Next
Next
crDiskFileDestinationOptions = New DiskFileDestinationOptions()
crDiskFileDestinationOptions.DiskFileName = Fname
crExportOptions = crReportDocument.ExportOptions
With crExportOptions
.DestinationOptions = crDiskFileDestinationOptions
.ExportDestinationType = ExportDestinationType.DiskFile
.ExportFormatType = ExportFormatType.PortableDocFormat
End With
crReportDocument.SetParameterValue("@ID_CASE_NMBR", idCase)
crReportDocument.SetParameterValue("@ID_CASE_NMBR", idCase, "MemberName")
crReportDocument.Export()
Response.ClearContent()
Response.ClearHeaders()
Response.ContentType = "application/pdf"
Response.WriteFile(Fname)
Response.Flush()
Response.Close()
System.IO.File.Delete(Fname)
Catch ex As Exception
lblMessage.Visible = True
lblMessage.Text = "Error Load
" & Convert.ToString(ex)
End Try
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Mr. Hilton,
Thank you, thank you, thank you!!!!! After several days of beating my head against the wall, my report works! I removed the unnecessary code as you advised. After I made those modifications, I started getting a "Operation illegal on linked parameter." error, but I figured out that I didn't need the following line of code since I linked my subreports to the main report: "crReportDocument.SetParameterValue("@ID_CASE_NMBR", idCase, "MemberName")". After I removed this line of code, my report (and all 5 of its subreports) rendered perfectly in the viewer!!!!! Thanks again for your help!
Below is the finished code snippet:
Try
idCase = Request.QueryString("id")
nameRpt = Request.QueryString("prtName")
Dim config As Configuration = WebConfigurationManager.OpenWebConfiguration("~/")
Dim settings As AppSettingsSection = DirectCast(config.GetSection("appSettings"), AppSettingsSection)
Dim file As String = settings.File
Dim dSource, iCatalog, userIs, passUser, appString As String
dSource = Nothing
iCatalog = Nothing
userIs = Nothing
passUser = Nothing
appString = config.ConnectionStrings.ConnectionStrings("OacisConn").ToString()
Dim AppArray() As String = Split(appString, ";")
Dim arrayLgth As Integer = AppArray.Length
Dim i As Integer
For i = 0 To arrayLgth - 1
Dim pairIs() As String = Split(AppArray(i), "=")
Dim firstItem As String = pairIs(0)
Dim secondItem As String = pairIs(1)
If firstItem = "Data Source" Then : dSource = secondItem : End If
If firstItem = "Initial Catalog" Then : iCatalog = secondItem : End If
If firstItem = "UID" Then : userIs = secondItem : End If
If firstItem = "PWD" Then : passUser = secondItem : End If
Next
Dim crReportDocument As ReportDocument
Dim crExportOptions As ExportOptions
Dim crDiskFileDestinationOptions As DiskFileDestinationOptions
Dim crconnectioninfo As ConnectionInfo
Dim crDatabase As Database
Dim crtables As Tables
Dim crtable As Table
Dim crtablelogoninfo As TableLogOnInfo
Dim Fname As String
Dim Prtname As String
Dim FPath As String
Dim crSection As Section
Dim crReportObject As ReportObject
Dim crSubreportObject As SubreportObject
Dim subRepDoc As New ReportDocument
FPath = Server.MapPath("") + "\"
Dim rptIs As String = nameRpt
crReportDocument = New ReportDocument
Prtname = FPath
Prtname = Prtname + rptIs
crReportDocument.Load(Prtname)
crReportDocument.Refresh()
Fname = "C:\WINDOWS\TEMP\" & Session.SessionID.ToString & ".pdf"
crconnectioninfo = New ConnectionInfo
crconnectioninfo.ServerName = dSource
crconnectioninfo.DatabaseName = iCatalog
crconnectioninfo.UserID = userIs
crconnectioninfo.Password = passUser
crDatabase = crReportDocument.Database
crtables = crDatabase.Tables
For Each crtable In crtables
Try
crtablelogoninfo = crtable.LogOnInfo
crtablelogoninfo.ConnectionInfo = crconnectioninfo
crtable.ApplyLogOnInfo(crtablelogoninfo)
crtable.Location = iCatalog + ".dbo." + crtable.Name
Catch ex As Exception
Response.Write(ex)
Exit Sub
End Try
Next crtable
For Each crSection In crReportDocument.ReportDefinition.Sections
For Each crReportObject In crSection.ReportObjects
If crReportObject.Kind = ReportObjectKind.SubreportObject Then
crSubreportObject = CType(crReportObject, SubreportObject)
subRepDoc = crSubreportObject.OpenSubreport(crSubreportObject.SubreportName)
For Each crtable In subRepDoc.Database.Tables
Try
crtablelogoninfo = crtable.LogOnInfo
crtablelogoninfo.ConnectionInfo = crconnectioninfo
crtable.Location = iCatalog + ".dbo." + crtable.Name
Catch ex As Exception
End Try
Next
End If
Next
Next
crDiskFileDestinationOptions = New DiskFileDestinationOptions()
crDiskFileDestinationOptions.DiskFileName = Fname
crExportOptions = crReportDocument.ExportOptions
With crExportOptions
.DestinationOptions = crDiskFileDestinationOptions
.ExportDestinationType = ExportDestinationType.DiskFile
.ExportFormatType = ExportFormatType.PortableDocFormat
End With
crReportDocument.SetParameterValue("@ID_CASE_NMBR", idCase)
crReportDocument.Export()
Response.ClearContent()
Response.ClearHeaders()
Response.ContentType = "application/pdf"
Response.WriteFile(Fname)
Response.Flush()
Response.Close()
System.IO.File.Delete(Fname)
Catch ex As Exception
lblMessage.Visible = True
lblMessage.Text = "Error Load<br>" & Convert.ToString(ex)
End Try
Thanks again!
Edited by: LaShandra Knox on Sep 18, 2008 4:10 PM
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Answers (2)
Answers (2)
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You should start by simplifying your code for passing parameters. We have a convenience method called SetParameterValue() that works very well. You simply need to tell it what parameter you want to fill and the value. It even works for subreports if you give it the subreport name.
Next is to confirm that your subreports are linked correctly to your main report. You can do that by running the report in the Crystal Reports designer. Are you prompted for your parameter value once or twice?
How did you link your main report and subreport? How did you ensure your main report parameter would automatically fill the subreport parameter? Give step by steps instructions so we can be sure you didn't miss anything.
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Thank you for your replies.
I am a newbie at Crystal Reports. The aspx code that I posted was written by someone else (I think they may have copied it from the web). I copied it and modified it to call my report. Unfortunately I am unfamiliar with the vb.net methods used to call/export reports. I tried moving the parameter code as the previous poster advised, but that didn't work for me. I probably still put it in the wrong place. I'm afraid someone will have to give me step-by-step instructions on how to modify my code.
I do believe that I have done the linking in the report correctly. When I preview the report in the designer, I am prompted only once for a parameter.
This is how I linked the subreports to the main report:
1. Right-clicked on the subreport and selected "Change Subreport Links"
2. In the Container Report Field(s) to link to section: From the available fields box, I selected the field on which I wanted to link and added it to the Field(s) to link to box. (Note: The field is retrieved by the stored procedure on which the main report is bound. In the Fields to link to box, it looks like this: "GetByPrimaryKey_CASE_BudgetSum;1.ID_CASE_NMBR")
3. In the Subreport parameter field to use dropdown, I selected the parameter name. It looks like this: "?@ID_CASE_NMBR"
4. I click OK to exit the Subreport Links dialog.
I performed the above steps for all 5 subreports.
Please advise.
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I think the best way to proceed will be as David suggested. Start small, gain knowledge and confidence and keep building on that. Here is a link to a number of sample applications. See how these work, then try to implement these in your app. I'd start with a simple report - no subreports, then add one subreport, then two and so on. Keep your testing / learning apps as win apps, once you are ready try web apps.
Here is the link to the sample apps:
https://smpdl.sap-ag.de/~sapidp/012002523100006252822008E/net_win_smpl.exe
This White Paper is really good for code and workings of Crystal Reports and .NET:
http://www.businessobjects.com/global/pdf/dev_zone/VS2005_Walkthroughs.pdf
Search the kbases here;
https://www.sdn.sap.com/irj/sdn/businessobjects-articles
And these resources will also be of help:
http://devlibrary.businessobjects.com/BusinessObjectsXIR2SP2/en/devsuite.htm
https://boc.sdn.sap.com/developer/library
C:Program FilesBusiness ObjectsCrystal Reports 11.5Helpencrsdk_samples_aspxdatacrsdk_net_tutorials_115_en.zip
C:Program FilesBusiness ObjectsCrystal Reports 11.5Helpencrsdk_net_docdoccrsdk_net_doc.chm
Ludek
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See if moving the parameter code to just after you log on to the database and before you export helps.
Ludek
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