Crystal Report Sub Report Problems

Question

Hello,
I am unable to use subreports within Crystal.
I call my data from a MySQL connection string, read it into a data set and then display the fields from the datasets within a report. I can do this fine for 1 report, but when I try to include a subreport it does not work.
I have tried lots of diffeent methods but have been unabled to get it working. I have tried the merge tool btw.
Help would be amazing please....
Imports CrystalDecisions.ReportSource
Imports CrystalDecisions.Web
Imports CrystalDecisions.CrystalReports.Engine
Imports CrystalDecisions.Shared
Public Class _Default
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim con As MySqlConnection
Dim myData, myLookUpData As New DataSet
Dim cmd, cmdLookUpData As New MySqlCommand
Dim myAdapter, myAdapterLookUpData As New MySqlDataAdapter
Dim myReport As New ReportDocument
Dim selectProperty As String
con = New MySqlConnection()
selectProperty = "pra50191"
' selectProperty = InputBox("Enter a Property Reference")
'Connection String
con.ConnectionString = ("Server=*****.ukservers.net;Database==****.;UID==****.;Password==*****.")
Try
con.Open()
cmd.CommandText = "SELECT a.no_name, a.address_line1, a.address_line2, a.address_line3,a.address_line4, a.town, a.county, a.postcode, a.display_price, a.general_desc, a.ref, a.viewing_text, a.directions, a.services, b.dimensions_ft, b.dimensions_m, b.description, b.fk_property_ref, b.fk_lookup_rootyp_id FROM tblproperty a, tblproperty_room_details b WHERE a.ref = b.fk_property_ref AND a.ref= '" & selectProperty & "'"
cmdLookUpData.CommandText = "SELECT id, description FROM tbllookup_user"
cmd.Connection = con 'Sets the SQLCommand to the connection string
cmdLookUpData.Connection = con
myAdapter.SelectCommand = cmd 'Sets the MySQL dataadapter to the command (connection string)
myAdapterLookUpData.SelectCommand = cmdLookUpData
myAdapter.Fill(myData) 'Fills the data table
myAdapterLookUpData.Fill(myLookUpData)
myReport.Load("C:\Users\zac\Documents\PJC Report\pjcBrochure2\brochure2\brochure2\testV2.rpt") 'Loads the report (report file location)
myReport.SetDataSource(myData)
myReport.SetDataSource(myLookUpData)
myReport.Database.Tables(0).SetDataSource(myData.Tables(0)) 'Add the tables to the report
myReport.Database.Tables(1).SetDataSource(myLookUpData.Tables(0))
CrystalReportViewer1.ReportSource = myReport 'Loads report into the viewer '
Catch myerror As MySqlException
MsgBox(myerror.Message) 'Error msg if the connection is unable
End Try
End Sub
End Class

Answer 1

I moved your post to the .NET - SAP Crystal Reports forum.
You are not passing anything to the subreport. I htink as it is, you're kinda hoping that somehow the subreport will know what dataset it is supposed to use. There is a couple of ways you can call the subreport and than pass the dataset to it. If you know the name of the subreport:
Dim crSubreportObject As SubreportObject
Dim crSubreportDocument As ReportDocument
crSubreportDocument = crSubreportObject.OpenSubreport("XXX")
crSubreportDocument.SetDataSource(myLookUpData)
or if you do not know the name of the subreport (a more extensible way I suppose you can loop through all the sections of the report looking for the subreport;
Dim crSections As Sections
Dim crSection As Section
Dim crSubreportObject As SubreportObject
'set the crSections object to the current report's sections
crSections = crReportDocument.ReportDefinition.Sections
'loop through all the sections to find all the report objects
For Each crSection In crSections
crReportObjects = crSection.ReportObjects
'loop through all the report objects to find all the subreports
For Each crReportObject In crReportObjects
If crReportObject.Kind = ReportObjectKind.SubreportObject Then
'you will need to typecast the reportobject to a subreport
'object once you find it
crSubreportObject = CType(crReportObject, SubreportObject)
'open the subreport object
crSubreportDocument = crSubreportObject.OpenSubreport(crSubreportObject.SubreportName)
'set the database and tables objects to work with the subreport
<your .SetDataSource code here>
Next
End If
Next
In all of this, don't forget to consult your developer help file. Looking at the samples [here|https://wiki.sdn.sap.com/wiki/display/BOBJ/NETRASSDK+Samples] will also be a good idea.
Ludek
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