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What's "MyObj"?? I don't see that anywhere in that code you linked to. I thought the code was pretty self explanitory. What don't you understand about it??
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I found that the code I tried to use earlier for my project didn't work for me (link). So, I found code that did what I needed, and that I could understand. This is the code that I used.
<pre>
Option Strict Off
Public Class Form1
Dim pdoc As New Printing.PrintDocument()
Friend WithEvents ppc As New Printing.PreviewPrintController()
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click
pdoc.PrintController = ppc
AddHandler pdoc.PrintPage, AddressOf pdoc_PrintPage
AddHandler pdoc.EndPrint, AddressOf xxx
' This shows nothing on the screen. It ends
' up calling the 'xxx' sub which saves the
' printpage images to files
pdoc.Print()
' This will show a regular print preview
pdoc.PrintController = New Printing.StandardPrintController
Dim ppd As New PrintPreviewDialog
ppd.Document = pdoc
ppd.ShowDialog()
End Sub
Private Sub pdoc_PrintPage(ByVal sender As Object, _
ByVal e As Printing.PrintPageEventArgs)
Static z As Integer = 0
If z = 0 Then
e.Graphics.DrawString("Page pg1", New Font("Arial", 48), _
Brushes.Black, New PointF(100, 100))
z += 1
e.HasMorePages = True
ElseIf z = 1 Then
e.Graphics.DrawString("Page pg2", New Font("Arial", 48), _
Brushes.Black, New PointF(100, 100))
z += 1
e.HasMorePages = True
Else
e.Graphics.DrawString("Page pg3", New Font("Arial", 48), _
Brushes.Black, New PointF(100, 100))
e.HasMorePages = False
z = 0
End If
End Sub
Private Sub xxx(ByVal sender As Object, _
ByVal e As System.Drawing.Printing.PrintEventArgs)
Dim ppi() As Printing.PreviewPageInfo = ppc.GetPreviewPageInfo()
For x As Integer = 0 To ppi.Length - 1
ppi(x).Image.Save("c:\look" & x.ToString & ".jpg")
Next
End Sub
End Class
</pre>
Hope this comes in handy for someone else 
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I'm writing an application to receive data from a hardware data logger and display it. The concept involves getting the data from a serial port, displaying it in a grid control, graphing it, then saving it in an ASCII delimited format.
So far, I receive the data and I load it directly into a DataGridView. As many of you know, this is extremely slow, especially for tens of thousands of data entries. I've read in a few places that it is more appropriate / efficient / expedient to use a DataGridView by binding it to a source of data. Much of the info I've found on the web relating to this concept deals with databases rather than a port based data stream.
I think my first design flaw was considering the DataGridView the actual data container. Much of this comes from using MSflexgrid in the past.
My questions are...
- Conceptually or architecturally how would you approach this problem?
- In what type of "container" should I receive the data into memory such that it will allow for easy manipulation (grid display, graphing, saving)?
Can anyone point me in the right direction? Thanks in advance.
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Any application, even a game, is really just a specialized database management solution. The data you get from the serial port should be cleaned and validated, then put into a data model you construct. Exactly how you build the data model depends on your data and your requirements. Once you have the data model, you can use any controls you need to show it.
The DGV is not an efficient data container. It was designed to bind to various data sources and show and edit the data in that source. You're more worried about how to show and graph the data and not worrying about how you need to manage that data. Once you have the data model built, gridding and graphing it is easy.
Look into the DataSet and DataTable classes as a start. You may even just skip those and create your own classes for records and tables to do this.
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Can someone suggest a PDF SDK for VB.NET that can write an image to a pdf, read from pdf and read text on image in pdf?
Preferably open source.
Thanks.
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You'll need a couple of libraries. The first two requirements, just about any library, like PDFNet, can handle. Your third requirement, "read text on image", require the use of some OCR library.
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Hello,
I would like to know how to add excel references dynamically.
Some times the software will be instal on computer with excel 2003 or excel 2007.
How can i do this ?
Thanks
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Visual Studio Tools for Office. You can start reading up on it here[^].
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Hi Freinds,
Please help me
i m using vb 6.0 and sql server 2000.
i have one table with 2 fields name as "start time" & "end time"
i want check in discrepancy of time when insert a data .
i use flex grid for data entry.
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For anyone to help you, you're going to have to define what you mean by "check in descrepancy of time".
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 Can someone help me i cant connect to sql 2005 express using vb2005 express. Im getting an error "Operating error 32, the process cannot access the file as it is being used by another process.
Please help. Thank you
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Can we see the code you are Using to Connect to the DB
Vuyiswa Maseko,
Sorrow is Better than Laughter, it may Sadden your Face, but It sharpens your Understanding
VB.NET/SQL7/2000/2005
http://vuyiswamb.007ihost.com
http://Ecadre.007ihost.com
vuyiswam@tshwane.gov.za
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You already asked this in the sql forum. Don't cross post
Bob
Ashfield Consultants Ltd
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Hi
I am relatively new to Reporting in VB.NET. Actually I am asked to retrieve a report which would basically contain some items with extensive calculations which I already constructed for on-screen display, now while creating crystal reports I didnt find the way to refer to that function so that on each retrieval of the database value, report will pass it to a function of VB.NET and then the function will return the value to display in the report i.e.
Private Function CAmt(ByVal Amt as integer) as String
Select Case Amt
Case 1
Return "One"
Case 2
Return "Two"
Case Else
Return amt.tostring
End Select
End Function
Hope you got what I mean to say.
Please help me asap.
Regards,
MAP Tiger
Tiger Softwares
Software Designer and Developer
VB.NET, ASP.NET, VFP
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you can create formula(say Camt) in formula editor. Now within editor window choose database field and then use if else operator . See link Create formula in crystal report
hope this helps
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If u want retrieval of the database value. U can use the SQL statement and assigned respected fields.
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If you can access the Amt field in crystal report, then create a formula with some name, and go to edit(formula editor).
Write the logic there..
like
if Amt = 1 then
"One"
else if Amt = 2 then
"Two"
else
Cstr(Amt)
Salai
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Hello...
I am in need of fetching the sql query written in the crystal report. Is there a way to get it from VB.net/C#.net ???
Salai
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Hello,
How do I include the database that I am using to my VB .NET application?
My application and the DB is connected via the ODBC. And i dont want to set up the database in another PC and creating the database and tables, etc... I would like to have the DB, tables, etc setup once my application is installed.. Possible?
The database that I am using is mySQL Server 5.0; Driver is: MySQL ODBC 3.51 Driver
Visual Studio 2005. And I am planning to publish the application via the publish tab in the properties.
Thanks!
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I have used MySQL in Linux Environment a long time ago. propably in redhat 6  . i have never used it in Windows. but to my knowledge Mysql is not like MS Access , you cannot ship it with your Application. even SQL you cannot do that. We usually have a Server and our Applications will point to that Server for Data, but now if you want to Copy your App on the CD and expect a DB , i think you should go for MSAccess.
Hope this Helps
Vuyiswa Maseko,
Sorrow is Better than Laughter, it may Sadden your Face, but It sharpens your Understanding
VB.NET/SQL7/2000/2005
http://vuyiswamb.007ihost.com
http://Ecadre.007ihost.com
vuyiswam@tshwane.gov.za
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Really?? Bummer. So, the only way around this is to just put all the tables in a text file and just copy-paste it then, huh? 
Thank you
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No. I don't use MySQL so I can't really comment on it specifically.
But, you normally include a blank copy of your database files or the SQL scripts to create the database in your installer. You can execute anything you need to setup the database from there.
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