Forms :: KeyPreview Stops Work After Some Control Is Disabled
Oct 20, 2010
I set the HourGlass, disable the button (to avoid ppl that are too used with FPS games), do the serial communication bit that last a couple of seconds, then the set the mouse back to normal and re-enable the button.And I have a few more like those through the software using text boxes or drop-down menus.[code]My form is set in design time to be KeyPreview = True and I even tried to set it again after the Click. The routine is simply not called and the ESC key on the keyboard does not hide the form anymore.
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Oct 2, 2009
In my WindowsFormApplication I have a ToolStripTextBox. I want this to get the focus and have all its text selected when the user presses the "i" key - no matter what control has the focus. That's easy, I thought, if I set the form's KeyPreview property true (originally I did this in the FormDesigner, but doing it in the form's Load eventhandler makes no difference) and have the following KeyDown eventhandler:
Private Sub Main_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
Beep() ' For debugging only
Select Case e.KeyCode
[code]....
But this does not work!? The above Sub is called only when the ToolStripTextBox has the focus and only AFTER the event has been handled by that control.
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Nov 4, 2009
I've written approx 4 projects that utilize a central DLL for database access. The DLL was written in VB.NET using the .NET 3.1 framework. All the code works great. Recently, I went through all the code and updated the connection strings to use a new username and password since they were using the SA account on SQL Server 2005. After recompiling and uploading the DLL to the web server, I disabled the SA account. All of a sudden, the DLL stopped working. It just stopped. I know that the code is ok because I copied it into a aspx file and it worked. I had to re-enable the SA account in order to get things back to normal, but I really would like to eventually disable it.
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Mar 1, 2010
I have this flexgrid which shows a different tooltip for every cell it contains. Now I would like to see this exact same tooltip for every cell when I put the flexgrid on enabled = false but I can't find a way to do this.
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Apr 11, 2012
As quick solution to the user wanting to be able to open a particular form from any other form (in a large application with many forms, not an MDI app), I added KeyPreview to each form and corresponding KeyPress event so that said form will open (ShowDialog) upon pressing F12 from all these other forms.
Since this update has been in place, the user has been getting intermittent (maybe 2 or 3 within the course of a workday) but nasty errors such as "exception has been thrown by the target of an invocation" and the dreaded "out of memory". Is there reason to believe (off the top of your head) that the KeyPreview could be causing this?
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Dec 23, 2009
I have two forms frmA, frmB. I have a listview on frmA with a couple items with tags. In the listviews Itemactivate event I get the FocusedItem's tag and open frmB. Everything works fine until I close frmB and come back to frmA. The original item is still selected but the Itemactivate no longer opens frmB. I can step right into the frmB.Show line on frmA, it's just that frmB nevers shows.
Private Sub ListView1_ItemActivate(...) Handles ListView1.ItemActivate
Select Case ListView1.FocusedItem.Tag
Case "showfrmB"
[code]....
I've tried adding Hides, Activates, etc. with no luck.
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Nov 22, 2010
My requirement is getting output from command window asynchonously in vb.net form, I am doing this with system diagnostic process and using addhandler. My problem is, I have separate class to execute process, after process start when control goes to a addhandler sub routine, it stops there only after it's execution(in addhandler subroutine), and never comes back where I am capturing output. Control should come to the line in below code - addInput = outputExe.ToString() so that I can captureoutput and go back to vb.net code behind.
code is as below
Public Class RunExe
Private Function ExecuteProcess()
procInfo = New ProcessStartInfo
procInfo.FileName = ExeFile
[code]....
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Nov 22, 2010
My problem is, I have separate class to execute process, after process start when control goes to a addhandler sub routine, it stops there only after it's execution(in addhandler subroutine), and never comes back where I am capturing output. Control should come to the line in below code - addInput = outputExe.ToString() so that I can captureoutput and go back to vb.net code behind. I know something is wrong but not sure what it is.
code is as below
Code:
Public Class RunExe
[code].....
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Jan 17, 2010
I would like to know how to make a button click only so many times until it becomes disabled.
I would also like to know how to keep what is put in a RichTextBox there, without erasing the other text;
Example: Two buttons, the first puts "1" into the RTB, and the second puts "2" into the RTB. However when I press the second button, it over writes the first value.
How can I prevent this?
You Can Ignore this question below;
Old Question: I am working on a counter, and want to know how to make a button show itself if I hid it.
I have:
CODE:
And would like to know how to make one of the buttons visible again, with one big button.
I know it has something to do with an "If" statement.
Answer: Button#.Show()
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Aug 30, 2011
When I set a control to "enabled = false", I want the textbox backcolor and forecolor to remain clear and distinct (white and back - respectively). Is there a place in VS 08 where I can define default appearnce for disabled controls? Or is there a beter way to lock control values other than using "enabled", that woulddn't affect apperance?
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Aug 4, 2009
I am using an webservice to update my dataset and have a picture box to show an processing image i.e. a gif showing a progress bar and the words processing. My prob. is the gif stops animation as soon as the control goes to the webserver. I have done this.
Timer1.Enabled = True
Timer1_Tick(Nothing, Nothing)
picServer.Refresh()
GetMasterData()
In the timer1_tick even too I have tried picserver.refresh (picserver is the picture box). Getmasterdata is the process where the data is returned from the web service and as the control goes to the web service it somehow stops the process of the gif. It takes about 5 mins to popup the data from the webservice this code is in the form load event of the main form.
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May 8, 2012
Is the a way for a ClickHandler to work IF the control is Enabled = False? Like for example to show a messagebox with the message "Unable to change this data".
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Dec 23, 2011
I am using Reflection with VB.Net to get all the forms in a list box and all controls in another list box for the selected form in the first list box for any selected Assembly from any location.
On selection of any form and clicking the 'Open Form' button it opens that particular form in disable state.
But it throws exception as connection could not established(seems the load event of the form still fires which is not desired).
So now i want that the form should load in disable state without firing any event of it and also if any of the control will be selected then it will be highlighted in the form with a red border.
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Jul 5, 2009
does anyone know how to change the text color of a disabled checkbox control?I have drawn a black background on my form interface and a checkbox has been positioned on top of this background. When the checkbox has its enabled property set to false, the text cannot be seen at all ( so I assume the disabled text color is black ).Does anyone know how to change this color? I've tried changing the chkbox.forecolor property from within the program code but it didn't change the disabled text color :/
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May 15, 2012
I have set KeyPreview Property of the form to True and in the KeyDown event capturing the 'Enter' key to navigate to the next control on the form (using Me.SelectNextControl). But for one particular textbox i dont wish to perform the form's keydown event instead i want that when the user keys ctrl+enter it should perform some particular task. I have noticed that when the keypreview is on the keydown event of the textbox isn't executing.. The following is the code i have used for textbox keydown
[Code]...
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Jun 21, 2010
is it true that if the AllowEdit property is set to false, any DataGridViewComboBoxColumn that my DataGridView has will be in a "disabled state" (will not allow the user to change the value of the DataGridViewComboBoxColumn) AND there is no way i can make it in an "enabled state" unless i switch the AllowEdit to true?
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Mar 24, 2009
I have a timer in vb.net and it's interval is 1000ms ,. i have placed in it's timer_tick event a code that will print screen the screen and save it to a database.The problem is when i click outside of the form, or loosing the focus of the mouse to the form containing that timer/printscreen, the timer stops. As a result the printscreen also stops.here are it's properties:
generate member = true
interval = 1000
modifiers = friend
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Apr 28, 2009
I have a user control, and want to be able to update its cursor while it is disabled. For example, say that I have a user control whose cursor is Default. The below code works ONLY when the user control is already enabled; if it is disabled the below code doesn't work and the cursor remains Default: Me.MY_USER_CONTROL.Cursor = System.Windows.Forms.Cursors.WaitCursor
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Dec 15, 2009
i've been working with multiple forms. here's the situation.. i have 2 forms form1 and form2 every time i show the form2 from the cmd Bttn in form1 then i close and reopen it again it always prompts me with disposal error.
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Mar 15, 2010
I was referred to this forum section for VB2008 questions instead of VB6, so Ill assume this is the right place to ask this question. Yes I copy/pasted.I'm EXTREMELY new to VB2008 and I was basically making a program that is used for "password storage" that will be used only by me, I have made a simple login page that will not allow new usernames/passwords and a simple text box-listbox-add-delete page for submitting and displaying what I wish. What Im trying to do is make it so every time I open the listbox form, you are prompted with the login form. Im not sure of a proper term for this as I just downloaded VB2008 2 days ago.
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Jun 1, 2009
i want to put one font dialog and one color dialog in one content strip menu that work in every form i have.
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Mar 20, 2011
I have an issue with my .NET application and it can only be reproduced sometimes and only on client's location, which makes it extremely difficult to resolve. In the application the forms authentication is used. There is a login page to which every anonymous user is redirected. After user enters username and password, it redirects to DefaultURL or some predefined page. The problem is that sometimes when user enters correct username and password, it doesn't login, instead it just refreshes the login page without any error messages. After several tries of inputing username and password, user is able to login to the system.
See my login page Submit_Click code below:
Dim userName As String = tbUsername.Text
Dim password As String = tbPassword.Text
Dim returnUrl As String = Request("returnUrl")
[code]....
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Feb 22, 2009
Is there a list or a way to get one of the lists in VB.Net to work like the ones in CDBurnerXP?I shows a small icon at the side, then has a title and a little description under that.Have designed a program around this style of list but now when i have came to .net to write it...
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Oct 30, 2010
I'm working on a simple calculator program for work in VB.NET and I'd like it that an operation could be performed without a mouse click and instead by using the Enter key. So essentially I want the segment of the program that is usually run by button to have the ability to be run by the Enter key.I'm using VS2010.This is what I was trying to do but I suppose I'm not doing it correctly because the Enter key does not do anything when I press it.
Private Sub btnCalc_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles btnCalc.KeyDown
Select Case e.KeyCode
Case Keys.Enter[code]....
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Nov 13, 2011
I am trying to build a program that monitors how other programs are being used and as part of it I need to figure out if it is possible to work out using VB code what window, program or process the user is currently using or Focused on.
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Feb 20, 2009
I hava a form app, that runs hidden, with just a notify icon, the goal is control worker schedule and alert them for some things they have to do.My problem is,when i open a form (with TopMost = True), it works if the user is admin of the machine or domain admin, if the user is "regular" user, the form just don't open or shown to the screen.I believe that it has got something to do with write permissions in the app folder. I have a contextmenu that works great, even restoring the hidden main form, it just doesn't show/open the other form, without any error.Shouldn't .net use the user $temp folder to write something? If not what's the best way for the app use the EnvironmentVariable("temp")?
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Jan 14, 2006
I was working with this control to make multiple pages fit on 1 main window. When clicking a menuitem, the program will go to the correct tab. Now the problem is, i only have the 2 standard tabs.. NOTE: This is NOT the standard Tab control found in VB.NEt 2005 ! Does anyone know how to add more tab pages
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Dec 14, 2010
I have this weird issue:I developed an application with a sequence like this login form -> mainform (=mdi parent) --> some functionform (mdi-child)--> report form
The reportform contains a reportviewer and will display different dataset queries depending on the state of some radio buttons which are located on the previous form ('some function form'). When I run the project directly from the 'some function form' (set startup form for project) things work great. The report shows the correct data depending on choices made on the previous form.But....when I run the project all the way from login and mainform it doesn't work. Seems like the choices made on the "some function form' are not coming through to the report form.
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Apr 10, 2009
i have finished build a simple inventory program. But this program just only work in single pc not at network. Could any body tell me how to make it work in network (multiple pc in network)?
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Nov 5, 2010
I was sent here by someone else that said someone here might.Below. is the message I get every time I reboot. I am not sure if it's a .NetFrame Work 1.0 or 1.1 error or not. It may be Visual Basic as I really don't know. Also, may be where I uninstalled some program or another the wrong way, by just deleting the folder instead of using the add and remove programs. I did have 1 program uninstall in-correctly by Revo Pro Uninstaller also about the time I started getting this error. But, I do know in the header error box it does say ".NetFrame Work" though... I just adding these suggestion as it might help you know what the problem might be. I have XP Home 2002 with Service Pack 3 installed. I have repaired the .Net FrameWork 2.0, 3.0 , 3.5 and 4.0. I couldn't repair the 1.0 or the 1.1 as I have deleted my temp folders that must have had something the installer needed in them. I tried to repair them with the "Installer" located in the "Installer" folder but it ask for some file in the temp directory that I did not have so I had to cancel the repair.
[Code]...
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