I have created a splash screen and it fades in. When the splash screen closes, the main form (MDI) should open. The main form opens but then immediately closes.
vb
Public Class frmSplash
Private Sub frmSplash_FormClosing(ByVal sender As Object, _
ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
'Open the MDI form.
frmMain.Show()
End Sub
[Code] .....
Dim frm As Form
For Each frm In Forms
Set frm = Nothing
Next frm
The above code is what I used in VB6 to close all forms associated with my programs before my program closed. I have been searching for information on how to make sure all forms are closed when closing a VB2008 program.
I have seen info on using the Project Property Shutdown mode When startup form closes and I currently have this set.
Is this all that is really necessary? Will the garbage disposal close everything else to free up RAM?
Also, if I have several forms open and want to close all from the main form without closing each one individually, what is the best approach? Is there a collection like in VB6, go through the collection, compare it to the name of the main form and close it if it is not the main form?
Within my Visual Studio 2008 VB.Net project I am opening multiple forms after setting the form (that is opening) to be an mdichild of the main form. This works in really well in most of my forms except one. I am doing the exact same thing for all of them.
Basically I declare the new form:
Using frm As New frmName() With {.variableName = currentVariable}
frm.MdiParent = Me.MdiParent
frm.openForm()
End Using
Within the openForm subroutine in the form code I have:
Public Sub openForm()
InitializeDataSources()
... ...
Me.Show()
End Sub
I know this works because if I remove frm.MdiParent = Me.MdiParent in the main form and change Me.Show() to Me.ShowDialog() in the child form then it works perfectly. Right now (for only one form) it shows the form for only a second (looks like a flicker when staring at the program) and then closes it.
Ok i have a login window which connects to a MySQL database and authenticates the user. Works perfect, BUT
If rowsEffected > 0 Then
cnMySQL.Close()
LoginForm1.Close()
MainForm.Show()
Else
cnMySQL.Close()
MsgBox("Login Failed!")
End If
That's supposed to close the login form and open the main form if the query returned a positive match of the login information. The login works, closes the login form, opens the main form, than mysteriously exits the application. I'm guessing its something simple but i don't see it .. the main form has nothing in it besides some inputs and labels no subs at all and if i change the form which the program starts to to the main form it runs as designed.
I know usually if you start your program from a module and use Application.Run() you can keep the thread open, but this is all forms no background work so i didn't want to go that direction.P.S. i just removed LoginForm1.Close() and it logs me in fine and opens the main form fine and keeps the app running but the login form is still open.
Everytime I execute my program, the main form closes by itself after about 15 seconds. The code is not the problem because it does the same thing when I put the whole code in comments. It's also not a key problem because it closes by itself even when I don't touch a single key when it's running.
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Public Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
For Each URLname As String In My.Settings.URLtoTrackCollection
URLtoTrack.Add(URLname)
[code]....
I want it to open and close after 3 seconds at each Timer1.Tick What i got so far:
[Code]...
I am attempting to find a way to get an existing form to close and re-open (with the controls re-set). If I use a method like
[Code]...
How can i actually reload a form without actually closing it and re-opening it?By using a button click?
View 34 RepliesI have an MDI form as the app start object.I don't think is related, but in the Form closing event, I check for some condition, and if it's true, I ask for confirmation before closing:
Private Sub FormBackground_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
If (e.CloseReason = CloseReason.UserClosing) Then[code].....
So long, everything works fine in my development machine, which runs windows XP.However, when deploying the application in a windows 7 machine, the message box works correctly, showing itself whenever it should, but after the form is closed the application keeps running in the background. This happens whether the form closes directly or asks the user first.I have fixed it putting an End instruction in the FormBackground.FormClosed event, but it doesn't feel good.
In the main form the user can choose to download information from a device.Since this request takes time, when "download information" is pressed I open new form in a separate thread: Private Sub RunDownload()
[Code]...
I have a form which has my main data. On the form is a button to open another form called AccountNotes.
The table keys are as follows:
tblAccounts
pkAccountID
AccountDetail
etc etc
tblAccountNotes
pkAccountNotes
NotesDetail
fkAccountID
When I open the form AccountNotes how do I ensure it is tied or bound to the main form record I am viewing?
I am making a program that edits my website with the input that I put in. But, it is requiring multiple forms (obviousily), but I don't know how to make it close the one I am in while opening the other. For example: I have a form that opens first that requires a Username and Password, so nobody can obviousily use it without knowing them. When I submit the correct username and password and go on with the editing, I need the login form to close. I do not know the coding for this part. Is it:
[Code]...
I am slightly confused on how a form should be closed. I have an exit button and have always done me.dispose in the click event. I just found out this causes the formclosing and formclosed not to be triggered. I found this out because I was updating the live database in the formclosing. Because of this I used me.close but this does not free up all the variables. Do I have to do me.close and then in the formclosed me.dispose in order to close a form correctly?
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View 2 RepliesMy project has a single dataset with about 6 datatables. Each of those datatables has a TableAdapater and a Bindingsource on the main form (due to various databound controls).
Now, I want to have a second form for adding a new record. If I bind the controls to the datasource it creates new TableAdapaters and new Bindingsources on that form. I was wondering if it's possible to simply use the ones from the main form instead like this
[code...]
I am currently working on a project that has a splashscreen This splash screen is designed to be shown when the main form begins to load its requirements, and then closes once it has loaded... Currently it works like so:
Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
frmSplash.Show()
dolotsofloading()
frmSplash.Close()
End Sub
[Code]...
My program displays nature pictures so I want to restore the original ratio on wide screens when the form is first normalised. In the form resize event (inside a flagged section to avoid looping) I have
[Code]...
For some reason the resize event is only triggered once and only the width gets set. If I change the order only the height gets set. how to make it change both?Actually I wouldn't ever need to change both if not for a small but annoying little problem on normalising. Rather than fit the available screen height it always seems to be a bit more, as if the top border height is added to the existing max height. This seems to be a .NET bug.
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View 4 RepliesSo i want these If statements to first see if discharge date has value and admit is null to do this ... and inorder to do this i have to open my other SQL reader which is dr1. becuase at this time i have dr2. open. How do i get around this since i cant read from two stream writer at the same time.
If dr2.Item("DischargeDateTime").ToString <> "" And dr2.Item("AdmitDateTime").ToString = "" Then
'patien is showing a dishcharge dat but NO Admit date
[Code]....
I have a standard windows application called winap. I have a com component which acts as an api to the winap. I have a class in winap call classapi which has all the methods that the api calls and all works well. The problem is that one of the methods in my class api needs to get a handle on form elements in the main worker thread. Whenever I try to access an existing form I keep getting null because the for exists in the main worker thread and my api call is in a seperate thread.
[Code]...
i need assistance that will help me open word document in window form. i will be glad if someone can furnish me with sample code .
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That opens my program fine, but I dont know how to close it from there. Also I want my vb program to start automaticaly, not hit a button and my other program shows up.
I have a project (Written in Visual Basic, using Visual Studio 2005) which has several user controls. I have had no problem setting it up where you click a button and it load a user control, but I cannot get it to remove the control that is currently open. For example The program opens on a starts screen, which has the choices, Control1, Control2, and exit. When you click Control1 button it should open up a screen to display an inventory. It does this just fine, but it does not close the main menu screen.
Here is the code for the initial startup of the project:
Public Class Form4
Public Sub Form4Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim CtrlMain As New ControlMain()
With CtrlMain
.Location = New Point(0, 0
[Code] .....
When connecting to a Sybase ASE database via ODBC using the code below, I'll occasionally get a '[IM006] [Microsoft][ODBC Driver Manager] Driver's SQLSetConnectAttr failed' error. this be caused by my code? I read here that I should be using the 'With' statement instead, but I don't understand how that would affect this.
[Code]...
I got stuck up with one issue of inventory/stock calculations and put my problem in four threads and grasped some ideas and thoughts for that. But could not find SQL query for this issue in those threads. i am able to construct SQL query for stock/inventory calculations. Since I could not find any SQL query as an example on this issue inspite of spending a lot of time and search, deifinitely there might be so many examples but i was unable to reach them, so after constructing this query i wanted to share my humble effort with all. It may be a second thought for beginners like me having the same problem.The second purpose of placing this query here is to welcome improvement or alternate of this query.
[Code]...
Finally starting some coding in VB.Net, I notice over the years, that we can say (in VB6)
Code: Dim MyForm_Stock as NEW frmStock
in the same session, being able to open, say 3 Stock Forms at the same time and maintain details independently of each of the other forms. Also am I able to maintain separate Database connections and the same table being opened and updated independently of each other by each separate form. What is actually taking place in terms of memory being used by each process? My ultimate goal is to be able to have ONE Module with all the possible data Connection and Recordset Opening and closing options, which I have failed miserably to do in my VB6 experience. Data access is an obvious module based set of subroutines. Others could be Date routines eg, Week Number of the year, Days Diff, Days to, etc. [Code]