Form validating event vb net Sexyfreechat


18-May-2019 03:45

form validating event vb net-86

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My final solution, unless someone has a better suggestion, is to change the Validating event to the Leave event and detecting whether the cancel button had been clicked in the Leave event and exiting if it was. Down (Down Arrow) and some how (and I never figured this one out) the next control in the tab order, regardless of the Tab Stop property, got focus. Causes Validation = False Public Class Form1 Private mbln Cancel As Boolean Private Sub Text Box1_Validating(By Val sender As Object, By Val e As System. According to the documentation: "The cancel button for a form is the button control that is clicked whenever the user presses the ESC key." Which says to me the behavior s/b the same! Why it would stop on a textbox with tabstop property set to False - I have no idea, unless it is a behavior of the container its in. Maybe you should be using the Key Down event instead of the Key Press event. here is a line copied from the documentation: "The Key Press event is not raised by noncharacter keys; however, the noncharacter keys do raise the Key Down and Key Up events." My guess is that the gun is sending some noncharacter data to you.

If I hit the escape, the validation event fires and since the m Canceling is not True, the validation error gets displayed before the form closes. As far as the original validation issue, I started a new project (VB2005) and tried your approach It works except that pressing the Esc key still causes the validation event to fire. The gun was putting out a LF after the CR and in the Key Down event it showed up as a Keys. Validating If Not mbln Cancel Then Dim dte Date As Date Time If Date Time. I have come to the belief that the problem we are seeing with the escape key is a bug. -- Al Reid "Terry" Hi Al, Nearly 40 years for me since my first college FORTRAN IV class! Well, one of the keys you would not see in either the keypress or keydown events is the tab key, which of course will move the focus.

thx and regard,s Norton Norton, I got the following tip from "Windows Forms Programming in C#" by Chris Sells, from Addison Wesley. How can something be wrong in a textbox when you use correct the validating event.

Close() End Sub Private Sub Text Box1_Validating(By Val sender As Object, By Val e As System. The code to tell if the cancel button has been clicked is: /////// Public Declare Function Window From Point Lib "user32" (By Val p As POINTAPI) As Int Ptr Public Structure POINTAPI Dim X As Integer Dim Y As Integer End Structure Private Function Cancel Button Clicked() As Boolean Dim p As New POINTAPI p. As far as the original validation issue, I started a new project (VB2005) and tried your approach It works except that pressing the Esc key still causes the validation event to fire. -- Terry "Al Reid" wrote: Well, I finally solved the barcode scanner problem. Cancel = True End If End If End Sub Private Sub Button1_Click(By Val sender As System. I just don't know what key code combination could direct focus to a text box control that should never receive focus since the Tab Stop property is false and there is no other code that sets focus to the textbox. Also in the docs on Key Down there is a mention of "Is Input Key" which I will have to look into. -- Terry Terry, I tried the same scenario in VB6 and found that it works the way one would expect AND there is no need for the m Cancel flag either. -- Al Reid "Terry" Hi Al, Nearly 40 years for me since my first college FORTRAN IV class! Well, one of the keys you would not see in either the keypress or keydown events is the tab key, which of course will move the focus.

This way both the escape key and the cancel button closes the form without causing the validation to occur. I reprogrammed the device to only send the CR and now the problem is solved. I am going to start a new thread - calling it a bug and see what happens. To Short Date String Else Msg Box("Please enter a valid date.") e. As far as the 'gun', it may be better to write a console app. -- Terry "Al Reid" wrote: I don't do anything with the barcode data in the Key Press event. I guess I could inspect the data in the Key Down event to see if there is a difference. news:78**********************************@microsof .. I am new to VB comming from VB6, but that was also the case in VB6.

One, remove the "control Box" from the form, so the user cant close it that way. in the btn Cancel_Click event: Removehandeler Text Box1.validating, Addressof Text Box1_Validating -- Terry "Darin" wrote: I know that, but the problem is when the user clicks EXIT, the textbox.validating event is called BEFORE the cancel.click is done, so the textbox is being validated. According to the documentation: "The cancel button for a form is the button control that is clicked whenever the user presses the ESC key." Which says to me the behavior s/b the same! To Short Date String Else Msg Box("Please enter a valid date.") e.

Then in the btn Cancel_click event, either set a module level variable like m Canceling to True and then in the validating event ... It doesn't need to be validated because the user is exiting. Length Yes, closing the form causes 'validating' to take place. Close() End Sub Private Sub Text Box1_Validating(By Val sender As Object, By Val e As System. I am going to start a new thread - calling it a bug and see what happens. Down (Down Arrow) and some how (and I never figured this one out) the next control in the tab order, regardless of the Tab Stop property, got focus. Cancel = True End If End If End Sub Hi Al, Nearly 40 years for me since my first college FORTRAN IV class! Well, one of the keys you would not see in either the keypress or keydown events is the tab key, which of course will move the focus.

Can you comment on this or expand your article to address this?



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