Question

How to Create a Crystal Reports from sql query string in vb.net

Asked by: kamikazis

I tried to create a crystal report according to the user choice in a vb form. For that i like to pass a dynamically generated query
to crystal report. But when im assigning the "SetDataSource" property of CR by the following coding its giving the error
 
"Object reference not set to an instance of an object ." ....

i used the following coding...




help me...

Thanks in advance

Public Class Form1
    Dim rpt As CrystalReport1
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim cnn As OleDbConnection
 
     
        cnn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=E:\ELA\Current\Tailor_Software\TailorDb.mdb")
        cnn.Open()
       
        Dim da As New OleDbDataAdapter("select * from User_Master", cnn)
        Dim ds As New DataSet
        da.Fill(ds, "User_Master")
 
         rpt.SetDataSource(ds.Tables(1))    'I am having the error at here
 
        CrystalReportViewer1.ReportSource = rpt
        CrystalReportViewer1.Refresh()
    End Sub
End Class
                                  
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Asked On
2009-05-14 at 02:53:32ID24407811
Tags

Crystal Reports

,

by sql query

,

dynamic crystal reports

Topic

Crystal Reports Software

Participating Experts
2
Points
50
Comments
7

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Answers

 

by: emoreauPosted on 2009-05-14 at 03:12:30ID: 24383213

you normally provide the full dataset to a report, not just a table.

also, the table collections is 0-based. so if you want to access the first table, you need to provide the index 0 (ds.tables(0))

Finally, have a look at http://www.emoreau.com/Entries/Articles/2006/09/Feeding-Crystal-Reports-from-your-application.aspx

 

by: kamikazisPosted on 2009-05-15 at 04:07:10ID: 24394107

hi emoreau, ur page is very useful... Now i overcame this error...Now its executing correctly...But i want to display a crystal report as user desire by giving his choices in a vb form....I want to learn about grouping also..i tried gouping but nothing comes in CR...  Plz help me  Eric....

 

by: emoreauPosted on 2009-05-15 at 04:17:51ID: 24394168

>>But i want to display a crystal report as user desire by giving his choices in a vb form

I have explained that in my article. See the "Passing a value to a parameter of the report" section.

For grouping, have a look at http://www.businessobjects.com/global/pdf/dev_zone/VS2005_Walkthroughs.pdf

 

by: mlmccPosted on 2009-05-15 at 06:06:24ID: 24395005

What user choices?  What will the choices do?

mlmcc

 

by: emoreauPosted on 2009-09-29 at 04:46:59ID: 25447831

I think I put kamikazis on the right track

20120131-EE-VQP-002

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