Textchange event firing without any change in textbox contents - asp.net

Question

I have a form with a record number, then boxes for "primary" notes and effective date.
Then I have an optional "secondary" notes and effective date box.
When someone clicks on a button to edit the primary or secondary notes, it looks to see if the other notes have changed (a session variable set to "true" fires for the "textchanged" event for the other textbox). If so, instead of enabling the textbox that matched the "edit" button, it flashes a message saying to cancel or update the other textbox's changes.
My problem is that the contents of the textbox are being viewed as "changed" when nothing is changed. If I load the record, and run a separate validation check, it verifies that the contents of the textbox match with the data originally loaded into the textbox. Then, not changing anything, when I click on the "edit" button, that separate validation comes back as no longer matching, even though the information in the session variable and the textbox are both unchanged.
Here is my validation check -
If Not Session("SN1") Is Nothing Then
sesslst = sesslst & "<p>Sec Notes match = " & (Trim(Session.Item("SN1").ToString) = Trim(txtSecondaryNotes.Text)).ToString
sesslst = sesslst & "<p>Sec Date match = " & (Trim(Session.Item("SD1").ToString) = Trim(txtSecEffDate.Text)).ToString
sesslst = sesslst & "<p>S = " & Trim(Session.Item("SN1").ToString)
sesslst = sesslst & "<p>F = " & Trim(txtSecondaryNotes.Text)
End If
lblTest.Text = sesslst
Here are the results after initial record load:
SN1 - Bill Smith (Father) 10/12/1971 Linda Smith (Mother) 7/22/1971 Boudreau W Smith (Brother) 6/7/1994
SD1 - 4/1/2014 12:00:00 AM
Sec Notes match = True
Sec Date match = True
S = Bill Smith (Father) 10/12/1971 Linda Smith (Mother) 7/22/1971
Boudreau W Smith (Brother) 6/7/1994
F = Bill Smith (Father) 10/12/1971 Linda Smith (Mother) 7/22/1971
Boudreau W Smith (Brother) 6/7/1994
(all specific data in this example has been changed, so no real personal information is being displayed)
When I click the edit button and that validation loop runs again, the "Sec Notes changed" value changes to "false," but nothing else changes.
Initially, I had the session variable for the record change set for the "TextChanged" event. When it kept setting, despite no change, I added additional validation within the change event. If both the notes and dates session variable do not match the field information, it sets another session variable as changed -
Protected Sub txtSecondaryNotes_TextChanged(sender As Object, e As EventArgs) Handles txtSecondaryNotes.TextChanged, txtSecEffDate.TextChanged
If Not ((Trim(Session.Item("SN1").ToString) = Trim(txtSecondaryNotes.Text)) And (Trim(Session.Item("SD1").ToString) = Trim(txtSecEffDate.Text))) Then
Session.Item("secondaryEditing") = True
End If
End Sub
I never get passed the check for the "secondaryEditing" session variable when I click the edit button (the lstSess() proc just lists all the session variable names and values so I can see what's being compared) -
Protected Sub btnEditPrimary_Click(sender As Object, e As EventArgs) Handles btnEditPrimary.Click
txtPolicy.Text = Trim(txtPolicy.Text).ToUpper
lstSess()
If Session.Item("secondaryEditing") = True Then
secMsg.Visible = True
Exit Sub
Else
secMsg.Visible = False
End If
So, I thought the problem, initially, was maybe with the form, loading of data, and the TextChanged event firing but not being evaluated until the button was pushed, but even when I add in the additional If-->then validation within the event, it still thinks something has changed, when the data in the field has not even been enabled, let alone manipulated.
How can I get this to honestly evaluate whether the text in the field has changed? FYI - the asp:TextBox objects have been set with and without "AutoPostBack = 'true'" with no difference in how it runs.

Answer 1

Save your efforts, folks. The original programmer did not import all of the necessary System and System.Web classes.