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how can i detect if changes have been made to my dataset

Posted on 2004-08-31
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Last Modified: 2010-04-23
hi , i have a form with a datagrid, which is bound to a dataview, i want to write a procedure when the form_closing
event happens.
if there are any changes made to the dataset (the datagrid bound dataset /dataview)
then notify the user.
how can  i detect this, any sample links?
i did try the microsoft concurrency link
http://msdn.microsoft.com/library/default.asp?url=/msdnmag/issues/03/04/DataConcurrency/TOC.asp
but it didnt help me, im on ms access
thanks!
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Question by:jxharding
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RonaldBiemans earned 500 total points
ID: 11939999
You mean yourdataset.haschanges  this return true or false ?
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by:jxharding
ID: 11940090
hi rondal, thats the one ,thanks,
in which form event can i use it, it seems closing and closed events are too late
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by:RonaldBiemans
ID: 11940121
Hi jxharding,

Why are they to late ?
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Expert Comment

by:RonaldBiemans
ID: 11940142
maybe look at this code

Private Sub Form1_Closing(sender As Object, e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing
   ' Determine if text has changed in the textbox by comparing to original text.
   If textBox1.Text <> strMyOriginalText Then
      ' Display a MsgBox asking the user to save changes or abort.
      If MessageBox.Show("Do you want to save changes to your text?", "My Application", MessageBoxButtons.YesNo) = DialogResult.Yes Then
         ' Cancel the Closing event from closing the form.
         e.Cancel = True
      End If ' Call method to save file...
   End If
End Sub 'Form1_Closing
End Class 'Form1
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Author Comment

by:jxharding
ID: 11940143
the plan up to right now was  to execute this little piece of code,
  If Ds1.HasChanges = True Then
            MessageBox.Show("Update!")
            Exit Sub
 End If

and this would (supposed to have) allow the user to return to the form.
but now that you mention it, i prob should just put a dialogbox with a Yes and No button, asking the user if he wants to save.
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Author Comment

by:jxharding
ID: 11940149
saved again!,brilliant, thanks!
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