Program Crash When Pass Datagridview To Other Form Using .showdialog
May 23, 2012
im using visual basic.net and this is my problem i have 2 form which have a two datagridview . when i update the datagridview in the form 2 its working fine and when i exit it in the form 1 its also update , but when im trying to to click again the edit button(from form 1) the program is automatically exit or crash.
the code from my form2 exit button
form1.showdialog
me.close
form1 edit button
[Code].....
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Jan 12, 2011
Had this matter on Xp machine and visual studio 2010 ultimate after windows update between december and january: even the simplest windows form program crash on start when starting for debug (inside Ide, F5) unless putting breakpoints on each line of the autogenerated (and marked as "debugger step thorugh") code.(see: [URL]) I was wondering if this matter affects only Xp machines, or if someone with Seven or Vista had same matter.
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Mar 28, 2011
I have a form being called form several forms using ShowDialog().
1. Is there a way for called form to know which form called it by receiving a code or key from the calling form?
2. The calling form has a gridview. How can the called form pick up a column's value from the currently highlighted row in gridview in the calling form?
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May 15, 2009
i have a datagridview at form1 filled with 2 columns, mailName and callName. upon clicking an edit button, form2 will show with the details of the selected row in the datagridview from form1. how can i pass the values in the selected row from the datagridview to form2? my select statement at form2:
[Code]...
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Nov 24, 2010
So I'm pretty new to operating in the VB.NET environment, so this might be really basic. But my issue is this. I am writing an application to get the next available computer name within active directory. I have an VB program that queries active directory and finds the next available name. I also have a VB form that will allow you to set the name of the computer and which Active Directory OU it should go into. I would like to have the program that finds the next available name run right away when the app is opened, and then pre-populate the computer name field in the VB form with the next available name from Active Directory. However I'm having a very difficult time finding how to do this. I've tried adding the first program in the ApplicationEvents startup area, but I'm not sure that it's running, and I can't find how to programatically pass the result from the first program into a textbox field.
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Aug 7, 2009
I'm having an interesting issue that I can't reproduce on a different project, but can consistently on this one. I have no clue what might be causing it, but am hoping that someone may have seen it before.
I have a main form, from which I run a series of checks. On this form, I have a listview control. Because of some issues with the refreshing of this listview control, I had to create my own messagebox. It's just a form that displays some text ( it also happens to look nicer than MsgBox; in my opinion, anyways ). It's been working great for months, until recently.
My problem is that on my main form's load event, I run this check, which returns an error within a try/catch block. I then call my custom messagebox with a message. It in turns calls it's ShowDialog() function.
In any other situation ( after the main form has been loaded ), I have no problems. The messagebox goes on the screen and behaves appropriately ( ie: waits for my input and acts as a modal dialog ( stops execution of my main form's thread ) ). However, on this onload event, my messagebox comes up and goes away almost immediately afterwards.
I've traced it all the way to the showdialog() call. For no explicable reason, it appears to skip right over this call, without me doing anything on the form.
Here's what the inner trace looks like ( when I put a breakpoint on the onclosing event for this messagebox form ):
CODE:
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Jan 5, 2012
Quote:
Originally Posted by kaliman79912
Quick note: Close does not dispose of the form if it was displayed using .ShowDialog, but I guess this is not the case.
I did not want to hijack the other thread [URL] but would like to have this clarified for me.
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Feb 24, 2009
I have a form that I am using to search for records in a dataset, it has a text box for entry of the search criteria and a 'Search' button to initiate the editing of the entry and .Filter on the BindingSource. This is one form in a project with many, when I show it using .ShowDialog it always disappears, (not visible and not loaded) after the 'Search' button is clicked, I have stepped through and there is no .Hide or .Close that it encounters, it performs all of the logic correctly but control is returned to the main form it was shown from. When I use the .Show method, I do not have this problem.
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Nov 4, 2010
I converted this app from VB6. I have 2 forms. Form1 instantiates Form2 via a Menu Item.I am having trouble getting Form2 to end when clicking close (X). If Form2 is 'idle' it closes fine; but if I am in a loop processing anything all the events fire, but it continues processing in Form2. I've tried messing with Dispose, Close, Application.Exit, Application.ExitThread. My last attempt was creating my own event to fire back to Form1 and dispose Form2 -- and it hits it but Form2 is still running. What is the deal? BTW if I use just Show vs ShowDialog -- Form2 just blinks and disappears.[code]
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Jan 21, 2009
I converted this app from VB6. I have 2 forms. Form1 instantiates Form2 via a Menu Item.I am having trouble getting Form2 to end when clicking close (X). If Form2 is 'idle' it closes fine; but if I am in a loop processing anything all the events fire, but it continues processing in Form2. I've tried messing with Dispose, Close, Application.Exit,pplication.ExitThread. My last attempt was creating my own event to fire back to Form1 and dispose Form2 -- and it hits it but Form2 is still running. What is the deal? BTW if I use just Show vs ShowDialog -- Form2 just blinks and disappears.
Form1 does this
Dim f2 as Import
:
[code].....
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Sep 8, 2010
I have three form First Form is MDi form and Second Form Is Child Form and third Form Is small form.The small form conatin DataGridView searcher for name and I want whe I press the Event Mous Click he copy value from cell"column" of DataGridView to Child Form..[code]
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Feb 24, 2010
I have an Access 2007 database that runs constantly, the form on the database basically runs a timer every 10 seconds and runs a Macro. The problem I have is that when the backups run at night the network connection the database is on disconnects for the backup, so the database crashes with the error.
"Your Network Access was interrupted. To continue, close this database, and then open it again."
What I would like to do is create a small VB Application that runs on the machine that the database runs on, detects when the database has a problem, closes down the database process then restarts the database.
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May 9, 2012
In my program I use WebBrowser control for OAuth. It's located on vk_auth_window form. So in the code I call vk_auth_window.WebBrowser1.Navigate(vkauthurl). If authentication is successful, I silently get token, but if user is not authenticated a form vk_auth_window is showed to them to enter username and password. To check this I catch _DocumentComplete event and check for the right URL. I need no other code being executed until the user finished authentication or closed authentication form. ShowDialog() does the trick, but it somehow hides cursor from username and password fields in WebBrowser control. So I introduced a variable Dim showform as Boolean=True in and set it to False from the _DocumenComplete event and in the main code I use infinite loop.
While showform
System.Threading.Thread.Sleep(100)
Application.DoEvents()
End While
However it makes userinput slow due to thread sleeps. And If i remove them, it loads CPU quite a lot. Is there a better way to wait for form to close? What is it?
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Apr 18, 2011
I have a new developer that is calling Showdialog (in VB.NET) on a Windows Forms form without first creating an instance of the form.How is this possible? I don't see a shared method for ShowDialog...
I'm not crazy about this approach either as it seems to me that the dialog will not be disposed until the application exits.What am I missing? Is this a new best practice?OK, Form2 is just a blank form.Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles Button1.Click
Form2.ShowDialog()
End Sub
End Class
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Sep 10, 2010
So you know how when you call "Form.ShowDialog" from where ever you call it, it blocks until the form being displayed closes. And then the function returns whatever result it was.I want to know how to block like, but without a form, yet still have the "main ui thread".Basically I have this long process that needs to thread out and do several things... and it's heavily event based. It jumps between two threads, the main ui thread, and it's own background thread. The main ui thread needs to have access so that I can randomly open different dialog boxes for things... sometimes they're just windows asking to hit OK or Cancel to continue, others it's to perform some action, etc etc.
But there is NO central form related to it. It's a complete background thread running that randomly hops over to the main ui thread for things.Right now I have this class I designed called lets say "DoJobProcessor". On it is a function called "BeginDoJob" that threads off from the thread pool... when ever I need to jump back I use a ManualResetEvent to block on the background thread, jump over to to the main thread with "invoke" and passing a reference to the MRE, then release the block when done there and continue on on this background thread.
All while this is going on I just set the form I'm trying to block the main ui thread from managing by just setting its Enabled property false.It all feels just messy and annoying... and I was just writing something using ShowDialog and I was like... HEY, what if I could block this BeginDoJob method, hi-jack the main ui thread, then let that function return the result when done instead of having this "Complete" event with the return value in it. It's obviously possible because ShowDialog does it, but I don't know how.
This way the job I'm performing isn't always waiting for the main ui thread, instead its the other way around... the ui thread waiting for it, the way it aught to be. Show something, branch off do some stuff and just idle the display while it does it, come back show something else, branch off and just idle while it does that.
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Jun 21, 2010
I have a form that is called w/ ShowDialog. Inside that form, I want to pop a message box to ask the user a question, but it doesn't show.[code]
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May 17, 2009
I have problems with a form and load event.My form manage items that can be added, deleted or modified. In load code, I initialize all vars to cero. This is OK to be ready to add items.
My problem is with modify and delete. To carry this, I must load vars from a source. So, in my foreing code I have this:
[Code]...
My problem is that when showdialog is called, all data which were loaded from duplicar funct is put again to cero. How can I avoid this and load correct data into the form.
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Feb 24, 2009
I am writing an application in VB2008 with several forms. From Form1 I open a new form with me.hide() and then form2.showdialog(). The system works but in form2 the application runs without screendisplay until the program waits for a user input. So first all databases are processed. Meanwhile no screen is visible for the user. Sometimes this takes about 5 seconds. I would like the user to see the build up screen directly.
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Feb 11, 2011
I want to open a form as modal without using showdialog()Problem with showdialog() is we can not open the form as mdi child with it. i want to open few forms as modal but as mdi child forms. but i want to make sure user cannot go anywhere else without closing thst form.if we set parent form enabled = false then i can not set it as mdi child otherwise that form also becomes enabled=false.
if we write showdialog() then so many form icons will appear on taskbar. it we open as mdi child then only one icon appear i don't want to appear so many icons on taskbar so i want to open as mdi child but as modal
for eg. Mainform = mdi form
from mainform open formA = as mdi child of main form (but modal)
from formA open formB as child (modal)
from formB open formC as child (modal). if i use showdialog() then so many form icons on taskbar.
h2007
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Mar 7, 2009
im running this code to load a form and call a public method inside it:
vb
[b] newForm.Show()[/b]
Call newForm.editToolStripButton_Click(sender, e)
but when i use form SHOWDIALOG method it doesnt execute
Call newForm.editToolStripButton_Click(sender, e)
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Jun 25, 2010
Whenever I have an error, the program doesn't crash. It just stop executing code. The error message goes to the debug window (which I can't see until I end the program). If I have a button for example I can still click this and execute the code inside it.
I never thought I'd be asking this, but how do I make my programs crash again?
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Oct 28, 2009
I realize the program as of now has no output, and that's fine. I have an ofdOpenDialog that I didn't include in this post as it seems kind of irrelevant, that part works fine, browse button to a path, outputs the path in a textbox for the users reference. I have the only user-entered text box set to on change: [code]But when I do this, the program just instantly stops responding. Is that a problem with my code or is the text file it's reading too big? ( Roughly 3-4000 lines.) I read somethign about a buffer once, should I set that larger somehow?
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May 1, 2009
This program I made crashes on startup, I do not know what I am doing wrong, can anybody help me?
Here is the code Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Timer1.Enabled = True End Sub
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
AppActivate("Chat Window")
Do
SendKeys.Send(TextBox1.Text)
SendKeys.Send((Chr(13)))
Loop
End Sub
End Class
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May 5, 2011
The program has errorhandle and write log function, however, it could not catch the error message in the program.
The following error message in Event Viewer. Error Module: oleaut32.dll ,version 5.1.2600.5512, error code: 0x000048f9
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Oct 12, 2009
I am creating a VB program that has a Main class, and 4 windows forms. Each of the forms has a back and a next button to navigate trough the forms. The problem is that when I hit next (Here is the code)
Private Sub continueButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles continueButton.Click
VS 2008 Remember Textbox Text when Form reopens
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Jun 22, 2010
i have been trying to make a program that should restart my server if it crashes. Just some few problems... it won't work.[code]....My problem is that when it notices the program runs, it won't do the process again, and just stop watching for the server crash.
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Mar 31, 2010
I'm not sure what I am doing wrong with counters using a delay but it keeps causing my program to crash. I am trying to use a try/catch for a IO exception involving filename already existing. I have a stored procedure that deletes the file from the directory but if my VB code tries to put the same file there it is supposed to encounter my try/catch and run the counter for a pause time until the file is deleted. Well each time it reaches the counter through debugging or not my main program (windows form) just hangs up and becomes unresponsive. I have tried waiting and stepping through/over the try catch but it still remains locked up.
[Code]...
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May 1, 2012
I am working on a project in Visual Basic .NET 2010 on Windows 7 SP1 that previously ran fine in Windows XP SP3 but has recently started crashing immediately upon running the executable. I have made several additions/changes since the last time it was tested on XP, so it is difficult to pinpoint what might be the problem. (I commented out all of the start form's _Load event, which causes the form to load with no events triggered in the IDE, but the program still crashes in XP, so I suspect it's something other than my code, though I don't know what else could have changed to trigger it.)
[Code]...
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Feb 7, 2012
I have created a vb.net program and released it to the customer. They are running the exe and at times the program crashes unexpectedly and display the message: "... has encountered a problem and needs to close" I know I should have added code to handle the exception, but is there a way that I can find out which line in the program caused the error? What is generally as good way to track errors in a program after it has been released?
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Jun 1, 2011
I have a VB.NET 2008 program that crashes about once a month at a customer location. My log file does not include any clues of the crash, the program just dies with the infamous SEND / DONT SEND window.So I need to setup my customers so that in the event of a program crash, a DUMP file is created automatically, without any user intervention. Everything I read on internet indicates that the drwtsn32.exe program does that.
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