Form.Show() Wont Work After Closed?

Nov 15, 2011

Using VB Express 2010 in windows XP Pro 64.

A ListBox shows the project forms names.
On ListBox_DoubleClick
For Each F As Form In xFormCollection

[code].....

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Form.Show() Won't Work After Closed

Oct 29, 2011

Using VB Express 2010 in windows XP Pro 64.

A ListBox shows the project forms names.
On ListBox_DoubleClick
For Each F As Form In xFormCollection

[Code]....

Works fine the first time but after closing the form opened by the DC, if I try to open it again, throws an exception "Cannot access a disposed object".

Since I can still access any other form not previously showed I guess that the closing changes a status that allowed the form to be .Show, there is no F.Load , F.Activate after the exception doesn't seem to do anything. What should I do?

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for example i have this code :

Sub Month()
Dim Conn As New Data.OracleClient.OracleConnection
Conn.Open()
Try
Dim Cmd As New Data.OracleClient.OracleCommand
With Cmd

[Code]...

What will happen to the datareader when the Connection is closed ( Conn.close)

Will the Cursor that is used by the datareader be freed ? or will it stay open ?

If the cursor that is used by the datareader is still open , when will it be automatically closed ? or should i just closed it manually ?

Will it cause the dreaded "ORA-01000: maximum open cursors exceeded" ?

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I am trying to delete a file after viewing it. I loosely copied the code from [URL]. The problem I am running into is the filename I am passing is still in use after I close this form. How to get id where the file is being held open. Here is the relevant portion of the code. This is how I am opening it

Private Sub TifViewer_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
PicImage.ImageLocation = PassedImage
PicImage.SizeMode = PictureBoxSizeMode.Zoom
cboFrameNo.Items.Clear()
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[Code] .....

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I have multiple forms in my VB.NET application. How do I make it so that any form I close will terminate the application?

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Sub isFormOpen()
If xmlTest Is Nothing Then
xmlTest.Show()
OpenXML(filename)
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When a sub runs, it is using up large chunks of memory on every pass. It is loading pics into a listview. The pics are 1 to 2mb each and it is consuming 30-60mb for each one. How to release the memory once I close the form. Is there anything I can do to reduce it?

Private Sub PhotoFrm_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
For Each ImageStr As String In Images
Dim Extension As String = IO.Path.GetExtension(ImageStr)
Dim fs As New IO.FileStream(ImageStr, IO.FileMode.Open)
Dim br As New IO.BinaryReader(fs)
[Code] .....

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What is the best way to keep the checkbox checked once the form is closed so that it will enable the email notification?

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I have a webbrowser I'm making, and my listbox items for form2 disappear once I close form2 and reopen form 2. However, once I restart the program (Close everything) and re-enter, the data is saved. But once I reopen the selected form, the listbox items are lost. Here is my code (It's long)

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Im having 2 errors when loading the form the first one is: "The connection was not closed. The connection's current state is open" and the another one says "Conversion from string "" to type 'integer' is not valid" and everytime I change cmb_Suc appears: "The connection was not closed. The connection's current state is open" [Code]

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I created another form that had a pic and two simple buttons, one button plays music the other will stop the music if played and take you back to the previous form. My problem lies in when the users uses the windows "x" button to flose the form, the music does not stop. I have searched and failed and light that could be shed would be awesome.Apparently I saved the wrong file and am not on my VB box so this code is incorrect. I basically added the music to the resources, dim'd it and activated it with a button. The other button not listed in this code was set to "portal.stop()" and "Me.Close()"

Public Class frmFail
Private Sub PictureBox1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles PictureBox1.Click
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[code]....

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I used to have a single DataGridView (DGV) on a form. I formatted and populated this, then used DGV.Show to make it appear on my form. This worked fine.I upgraded my form, to included 2 DGVs. Within a sub I dim a new DGV, populate and format it as before then set this equal to whichever DGV on the form it's meant to be. For example:

Dim pDGV as new DataGridView
with pDGV
.ColumnHeadersVisible = True

[code].....

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I am making a picture viewer in vb.net. When I click a button to show images from a listview it does not work without the msgbox! I included code
Sub shows()
Dim k, s As String
Dim i, j, m As Integer
''' When I use this, it doesnt work!!!
'Dim cbz As New Thread(AddressOf shows)
'cbz.Start()
[Code] .....

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I'm currently in Logic, Design, and Programming at college and we have homework over Arithmetic Operations.For example:100 ^ 2 - (((43 2) + 17) Mod 5 - 7.4) * 3 = 10,013.2

I need to solve it, we can use VB Express 9 to get the answer but we need to show the work. I've done fine up until the question. We have a test tomorrow and we are have 30/100 points just over math equations where we aren't allowed any use of the PC or calculator and I'm stuck on how to break this down.

[Code]...

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