Link to home
Start Free TrialLog in
Avatar of dyarosh
dyarosh

asked on

How to determine if data on a form has been modified using Visual Basic

I am new to Visual Basic and have learned mainly from Trial and Error.  I definitely don't do things the way they are supposed (at least that is what I think.)  Here is my problem.  I have a windows form that displays a datagrid of employees.  When the user double clicks on an employee it opens another form where the data can be modified.  The way I accomplish this is to have a check for an employee id  on the form that gets set from the first form (employeeid).  Using the employeeid, I use the following code to load the record onto the form (see EmployeeLoad Event code).  Now what I want to do is to see if any changes have been made to the record before allowing the form to be closed (see CancelAddButton_Click code).

I never get the Prompt to Save data message.  When debugging, EmployeeDrow.RowState always says Unchanged.  What am I doing wrong?

EmployeeLoad Event
 
Me.EmployeesTableAdapter.FillByEmployeeWithEmployeeID(pfmsDataSet1.Employees, EmployeeIDText.Text)
If pfmsDataSet1.Employees.Count = 1 Then
   EmployeeDrow = pfmsDataSet1.Employees.Rows(0)  ' EmployeeDrow is a global variable
Else
   MsgBox("More than 1 employee found")
End If
 
===========================================================================
CancelAddButton_Click code
 
If EmployeeDrow.RowState = DataRowState.Modified Then
   MsgBox("Prompt to save data")
Else
  Me.Close()
End If

Open in new window

Avatar of Wayne Taylor (webtubbs)
Wayne Taylor (webtubbs)
Flag of Australia image

Avatar of dyarosh
dyarosh

ASKER

Modified CancelAddButton_Click to the following:
If pfmsDataSet1.HasChanges() Then
   MsgBox("prompt to save')
End If
Me.Close
I still don't get the prompt.
ASKER CERTIFIED SOLUTION
Avatar of Wayne Taylor (webtubbs)
Wayne Taylor (webtubbs)
Flag of Australia image

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
Avatar of dyarosh

ASKER

pfmsDataSet1.AcceptChanges() did not work.  Since the data is bound on the form I used EmployeesBindingSource.EndEdit() and now I get prompted when the data is changed.  Thanks for your help.