How to create RDLC report with joined tables? - vb.net

Question

I'm trying to create a report that will display my table that has joins from different tables that looks likes this,
select * from tblproduct As p inner join tblbrand As b On p.bid = b.brandid inner Join tblclassification As c On p.cid = c.classid inner Join tblformulation As f On p.fid = f.formid inner Join tblgeneric As g On p.gid = g.genericid inner Join tbltype As t On p.tid = t.typeid
My table consist of 8 columns and 4 of it is column id's for joins, I can succesfully use the query when im trying to display to datagridview but when I try this in reportviewer it doesn't work and gives me error: "Object reference not sent to an instance of an object". This is what I tried,
Public Class frmInventoryReport
Public Property strReport2 As String
Private Sub frmInventoryReport_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Me.tblproductTableAdapter.Fill(Me.groceryDataSet.tblproduct)
Me.ReportViewer1.RefreshReport()
Dim rptDataSource As New ReportDataSource
Try
With Me.ReportViewer1.LocalReport
.ReportPath = "D:\VisualBasic\EELPOS - Copy\EELPOS\Report3.rdlc"
.DataSources.Clear()
End With
Select Case strReport2
Case "Report3"
Dim i As Integer = 0
Dim sqlQuery As String = "select * from tblproduct As p inner join tblbrand As b On p.bid = b.brandid inner Join tblclassification As c On p.cid = c.classid inner Join tblformulation As f On p.fid = f.formid inner Join tblgeneric As g On p.gid = g.genericid inner Join tbltype As t On p.tid = t.typeid"
Dim da As New MySqlDataAdapter(sqlQuery, cn)
Dim dt As DataTable = New DataTable()
While dr.Read
dt.Rows.Add(i, dr.Item("barcode").ToString, dr.Item("generic").ToString, dr.Item("classification").ToString, dr.Item("type").ToString, dr.Item("formulation").ToString, dr.Item("price").ToString, dr.Item("qty").ToString)
End While
da.Fill(dt)
rptDataSource = New ReportDataSource("inventory", dt)
End Select
Me.ReportViewer1.LocalReport.DataSources.Add(rptDataSource)
Catch ex As Exception
MessageBox.Show(ex.Message, My.Application.Info.Title, MessageBoxButtons.OK, MessageBoxIcon.Error)
End Try
Me.ReportViewer1.RefreshReport()
End Sub
End Class
What's the correct way to do it?