dotnet windows forms: Solution: Stop validating if Cancel button Clicked -- dotnet windows forms

Re: Solution: Stop validating if Cancel button Clicked

Jared
9/10/2004 9:09:36 PM

In the Textbox's validating event perform your validation, if it passes
great, if it fails close the form. Set the buttons CausesValidation property
to false and use its click event to close the form.

A text box and a button.

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click
Me.Close()
End Sub
Private Sub TextBox1_Validating(ByVal sender As Object, ByVal e As
System.ComponentModel.CancelEventArgs) Handles TextBox1.Validating
'Perform your validation checks here
If Me.TextBox1.Text.TrimEnd.Length = 0 Then
Me.Close()
End If
End Sub
Private Sub TextBox1_LostFocus(ByVal sender As Object, ByVal e As
System.EventArgs) Handles TextBox1.LostFocus
TextBox1_Validating(TextBox1, New System.ComponentModel.CancelEventArgs)
End Sub

[quoted text, click to view]

Re: Solution: Stop validating if Cancel button Clicked

jbyy4u NO[at]SPAM yahoo.com
9/14/2004 10:12:07 AM

Jared,

I think you missed the point. If the user has entered
something/anything and then hits cancel running the validation event
by design will popup a message telling them what the error/problem
is...but I didn't want that if they did indeed hit the cancel button
then I just needed to cancel and if validation failed when a user was
really trying to get it right it would be rude to close the form.

JB

[quoted text, click to view]

Re: Solution: Stop validating if Cancel button Clicked

jbyy4u NO[at]SPAM yahoo.com
9/14/2004 10:16:56 AM

I did mess around a bit with the causesvalidation property and this
and/or e.cancel = true can be valid methods to control the whole
validation thing but in this case because the only other button was
cancel (by default the next textbox was disabled until textbox1 had
been validated) then having the cancel button cancel validation would
cause the validation to never occur! That's what was driving me crazy
and why I came up with this work around.

Thanks.

JB

[quoted text, click to view]

Re: Solution: Stop validating if Cancel button Clicked

Jared
9/14/2004 7:00:05 PM

JB,
In the English language I know this is considered rude, very rude --> "I
think you missed the point."
You need to remain courteous when asking for assistance, or get clever when
you write down your comments! ;-)

My reply to the comment:
Dim options As System.Text.RegularExpressions.RegexOptions = _
System.Text.RegularExpressions.RegexOptions.None
Dim regex As System.Text.RegularExpressions.Regex = _
New System.Text.RegularExpressions.Regex("\s(a(\w)\2).+((\scl).+(own))",
options)
Dim Matches As System.Text.RegularExpressions.MatchCollection _
= regex.Matches(MyReply.Text)
Dim Result As String = Matches.Item(0).Groups(1).Value _
& Matches.Item(0).Groups(4).Value _
& Matches.Item(0).Groups(5).Value
System.Windows.Forms.MessageBox.Show(Result.ToUpper, "What I think of the
comment - I think you missed the point.")

My Reply to the post
First of all, I'm not writing your program for you, the example I presented,
albeit does not perform the desired results, does demonstrate the methods in
which you can achieve your results. Secondly, I don't know if you have
noticed, but, the event handler has an argument called sender, this
represents the object that raised the event, an object like a textbox, that
includes a name attribute. With this knowledge you no longer have to provide
a "workaround" with extra controls sucking up memory space. So, in this case
you have no reason to use Me.ActiveControl.Name! I have a simple form with
three textboxes and one button. Each of the Validation handlers is attached
to the same routine, when it fires it converts the object to a generic
control and gets the name. Use it in a select statement, use the gettype or
typeof to perform specific validation on your controls.

Private Sub MyTextboxes_Are_Validating(ByVal sender As Object, ByVal e As
System.ComponentModel.CancelEventArgs) _
Handles TextBox1.Validating, TextBox2.Validating, TextBox3.Validating
Console.WriteLine("The control that is currently validating is: {0}",
CType(sender, Control).Name)
End Sub

You should be doing something SIMILAR to

[quoted text, click to view]

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