?
Solved

DataSet update via a TIMER

Posted on 2004-08-26
7
Medium Priority
?
226 Views
Last Modified: 2010-04-23
Hi, I cannot seem to get a textbox to update on the timer value - the record count should go up and down, but it just stays the same:

...CODE FOR TIMER1
        Dim ready As String
   
        DataReadyPallets1.GetChanges()
        SqlDataAdapter1.Update(DataReadyPallets1)
        SqlDataAdapter1.Fill(DataReadyPallets1)
        ready = DataReadyPallets1.tblpallets.Rows.Count.ToString
        TextBox1.Text = " READY PALLETS: " & ready
        TextBox2.Text = Now()
...END

I know I am doing something foolish, but no time to figure it out.  Thanks!
0
Comment
Question by:Dan Flood
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
7 Comments
 
LVL 27

Expert Comment

by:planocz
ID: 11903561
ADD...

textbox2.refresh
0
 
LVL 14

Expert Comment

by:ptakja
ID: 11904513
The GetChanges method returns a DataTable object.  You need to pass that into your Update method like this:


    SqlDataAdapter1.Update(DataReadyPallets1.GetChanges())
0
 

Author Comment

by:Dan Flood
ID: 11906098
Hi,

This now causes an exception error and crashes the program :

      Dim ready As String

        SqlDataAdapter1.Update(DataReadyPallets1.GetChanges())     <-- NULL EXCEPTION ERROR.
        ready = DataReadyPallets1.tblpallets.Rows.Count.ToString
        TextBox1.Text = " READY PALLETS: " & ready
        TextBox2.Text = Now()

Also, the textbox2 is rfreshing OK - its a data issue.
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 27

Accepted Solution

by:
planocz earned 1000 total points
ID: 11906188
  try something like this...

try
    SqlDataAdapter1.Update(DataReadyPallets1.GetChanges())     <-- NULL EXCEPTION ERROR.
        ready = DataReadyPallets1.tblpallets.Rows.Count.ToString
        TextBox1.Text = " READY PALLETS: " & ready
        TextBox2.Text = Now()
catch exp as  System.ArgumentNullException
'skip of null
end try
0
 

Author Comment

by:Dan Flood
ID: 11906410
That just hides the error, it doesn't fix the problem :-(

0
 

Author Comment

by:Dan Flood
ID: 11906431
Private Sub Timer1_Elapsed(ByVal sender As System.Object, ByVal e As System.Timers.ElapsedEventArgs) Handles Timer1.Elapsed

        Dim ready As String

        Try
            SqlDataAdapter1.Update(DataReadyPallets1.GetChanges())
            ready = DataReadyPallets1.tblpallets.Rows.Count.ToString
            TextBox1.Text = " READY PALLETS: " & ready
            TextBox2.Text = Now()
        Catch exp As System.ArgumentNullException
            TextBox1.Text = "Update Error."
        End Try
    End Sub
0
 

Author Comment

by:Dan Flood
ID: 11910176
I found the solution myself, but your comment was the closest to helping :) thanks
0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I think the Typed DataTable and Typed DataSet are very good options when working with data, but I don't like auto-generated code. First, I create an Abstract Class for my DataTables Common Code.  This class Inherits from DataTable. Also, it can …
Microsoft Reports are based on a report definition, which is an XML file that describes data and layout for the report, with a different extension. You can create a client-side report definition language (*.rdlc) file with Visual Studio, and build g…
This is my first video review of Microsoft Bookings, I will be doing a part two with a bit more information, but wanted to get this out to you folks.
In this video, Percona Solution Engineer Dimitri Vanoverbeke discusses why you want to use at least three nodes in a database cluster. To discuss how Percona Consulting can help with your design and architecture needs for your database and infras…

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question