Closing Form After Large XML File Is Opened?
Oct 21, 2011
I'm working through an example in a programming book and stumbling across a problem that I can't seem to figure out. The program in question is basically a very basic 'level viewer' for a tile based bitmap game (its a game creation book). The source code from the author was written for Visual Studio 2005, and I am using 2010. The source code imports fine and the program runs correctly.
I built the same program on my own, starting from scratch in VS2010. The program works like this: It opens a tile set palette (bitmap form), then uses an XML file to create a 'level'. The XML file indicates which tile goes where on the 'level'. The XML file is roughly 1.9MB and has roughly16,000 entries (the program creates a level that is 4096 x 4096 pixels using 32 x 32 pixel tiles).
Running and closing the program from source code runs exactly as expected. Running the program from my version runs exactly as expected. Closing it does not. It basically hangs up for about 2 minutes on close. (for reference every loads in about 3 seconds). I've determined that it is the XML file that is causing the problem by excluding the portion where it loads the XML. In that case it closes fine. If I cut it down to just a few records, my program closes fine as well. So it seems like the program is having trouble dumping the XML document at close.
I've tried to track down any differences between the source code and my code, and the only thing that I have found is that the References in mine are all using .NET version 4.0 and the references in the source are using mostly 2.0 and some 3.5 (System.Data.DataSetExtensions, System.XML.Ling.dll, and System.Core.dll)
The code for the entire form is:
Imports System.Xml
Public Class Form1
Public Structure tilemapStruct
[Code].....
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Dec 29, 2011
I have this form called gamePlay form. This form is showed by my loading form. When the gamePlay form is showed the loading form is closed. At the gameplay form i will be opening another form called congrats form. At congrats form I need to close the gamePlay form. How should I close the gameplay form from the congrats form. I tried creating an instance of the gamePlay form and obviously the gamePlay form won't close since the instance that opened gamePlay was not the one who closed it. I know it's a bit confusing.
[Code]...
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Mar 30, 2010
I've got a fairly large VB.NET (3.5) project that makes a lot of database calls. So I created a namespace/class just to handle those fuctions. The idea was that this single point of entry into the database would give more control over validating input from users.
So my class looks something like this. (I've chopped some code out for readability, it works just fine except for all the open connections.
[Code]...
So I can close the data reader, but how do I reach back to that original database class and close the connection. If I close it in that original class it will bomb when I try to loop through the data reader the in calling class.I'm sure this is probably pretty obvious but I'm fried from the keyboard.
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Jun 21, 2010
What I wanted to do is close all opened workbooks. This code does the work IF there is at least one or more opened workbooks. My problem is IF there is NO opened workbook at all; It goes around unendlessly in the WHILE Loop. How do I not process the closing IF there is no any opened workbook at all? (NOTE: I found this code from somewhere else.)
[Code]...
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Oct 4, 2011
Do you mean, "opens a file" or "is opened with a file"?
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Jun 4, 2010
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?
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Aug 25, 2009
I using Microsof Visual Basic 2008 Express Edition. I need to create a form like: 2 buttons are open and save existing .xls file which each generation can choose a different.2 textbox that can be entered on the column
and last button to when choose two columns, to find duplicates values and mark different color same values. Is it possible?
At the moment Excel file opens, but the comparison does not require the introduction of the columns
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Apr 27, 2011
I have the following code to close a form which is a child. The problem is that when it closes, it closes the MDI parent too.
Private Sub frmTransaction_Closing(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing
If ListView1.Items.Count >= 1 Then
[Code]....
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Mar 5, 2009
Iam creating an application. i have a main form it has 5 buttons i have created 5 more forms. my aim is to show a particular form for every button the form is opened in a new window i dont want to open in a new window it should be embed in the main form when i click anthor button it will show the related form in place of previous form
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Mar 5, 2009
Iam creating an application.i have a main form it has 5 buttons i have created 5 more forms.my aim is to show a particular form for every button the form is opened in a new window i dont want to open in a new window it should be embed in the main form when i click anthor button it will show the related form in place of previous form?
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Nov 29, 2009
If I need to run a sub from another form, I would normally do something like this:
DirectCast(Application.OpenForms("frmTest"), frmTest).PublicSub()
How would I run the sub if the user never opened the form? The form is an options form and it may not be opened by the user if they opt out of changing the default values. I don't want to change the location of the sub because the sub relies on a lot of info on that form.
I tried Google and playing around with intellisense, but I've come up with nothing so far.
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Sep 6, 2010
I have question regarding how i can check if the form is opened or not ??
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May 31, 2009
I have 3 simple questions:
1. How to check if a form is opened?
[URL]
End If
2. How to play a sound (just a beep or something?)
3. When i have a string with keywords, separated by ","'s, how to convert this into a array? (F.A. Test1,Test2,Test3)
String.Split(",")
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Oct 25, 2009
I want my program to be able to create a '.txt' file when it is run for the first time, with the date and time the program was accessed, and to be able to add new 'logs' of program history every time it is accessed. What i mean is that i want my program to be able to create a '.txt' file, and then fill in the dates and times when the program is opened.
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Jun 5, 2009
Is there a better way of finding the path of a file that was opened with the open file dialogue? This is what I did. It works, but it seems like there should be a way to get the path through one of the open dialogue options.
Code:
'm_PicSource = OpenFileDialog1.FileName
'm_PicSource is a global var
Dim strCnt As Integer = m_PicSource.Length - 1
[Code].....
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Feb 8, 2012
Alright, I have a vb6 LEGACY application and new Functionality (Form) written in c#. I have a VB.NET COM Class as a wrapper. I can launch the .NET Form just fine. THe problem I am having is closing the .net form from vb6.
Example:
In VB6, I have something like this:
CODE:
But it does not work becuase frmViewer is Nothing for some reason. how I should close the .NET form that was launched from VB6?
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Apr 2, 2012
I have a parent form that has a list of items and each item has a unique ID. The user can open one or many of the items in a child form (it is set up in a tabbed MDI), but it can only open one instance of each item at a time.
In the parent form, I was going to make a collection (or something like that, maybe there is a better way) to keep track of which items are open in the child forms. I need to know when each child is closed so that it can be removed from the collection and reopened at a later time. I was thinking that when the child form closes, it somehow does something (like raise an event) that tells the parent form to remove the unique ID from the list of current open child forms.
My questions are, is this a good way to do this and I am pretty sure I would use the form closed event in the child form to update that parent form, but as well, I didn't know if this is the best way of handling it.
If raising the event is a good way, are some examples on how to do it out there? I found some for controls, but not while the form is closing/closed.
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Apr 19, 2010
I have a MainForm which has tab Control and several independent form. I open each Individual From in the tab of the main form. A "Close Tab" button on the MainFrom closes the current tab, its implementation is below.
This closes the current tab but what I also need is to dispose the From whose tab is closed but I am not sure how to get the instance of the form.'[code]...
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Mar 19, 2010
I have three forms (form1,form2,form3), form2 is embeded in the form1 and it opens from from1,Form3 is embeded in form1 too, but it opens from form2, I am passing data from form2 to form3 and form3 is declared such private , my problem is that I can not hide form3 from form1.[code]
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Sep 20, 2010
If I have a form open already that is not modal, can I turn it modal by the click of a button on that form.
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Apr 21, 2011
I'm trying to find and focus a opened form. e.g. My opened form title = "Basketball Days"..How I can find the "Basketball Days" form and focus?
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Jan 10, 2010
So I open files and do whatever with them right. I've set the initial directory to equal the last directory, but whenever I open multiple files, it never sets the directories properly. It acts as though nothing was opened there, so it takes the previous directory as the last one. Thoughts on what's not working? Here's the code.
Code:
With FileOpenDialog1
.InitialDirectory = LastDirectory
If .ShowDialog = DialogResult.OK Then
[code]....
I have multiselect enabled earlier and everything else works but this. When you open a single file, the last directory works fine. It only happens with multiselect.On another note, does anyone know why it freezes when I try to do a lot of files and use another program? I opened 700+ files to see what would happen. When I switched to a IM convo, it froze. When I left it to run, it worked.
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Jan 7, 2009
how can I check(with code) if an mdichild form is already opened or not. I have some mdichildforms that may open together. If an mdichild form is opened I want to dislpay the already opened form and not a new one.
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Jun 4, 2012
I have a master form which uses the SplitContainer control. The PANEL1 of the split carries the MenuStrip and Panel2 is used to call related external forms
Code (refer below): Function ResetSplitContainerPanel2 clears the Panel2 and loads the new form using the SetFormAttributesToLoadInPanel2
Issue: Although SettingSplitContainer.Panel2.Controls.Clear() clears the Panel2 but the form still maintains the form in the editable mode. If I call the same form again, I can see the values which I typed earlier
Output Expected: On Load of new form, the previous loaded form in PANEL2 should be disposed completely
Private Sub ResetSplitContainerPanel2()
SettingSplitContainer.Panel2.Controls.Clear()
End Sub
Private Function SetFormAttributesToLoadInPanel2(ByVal formNameToChange As Form) As Boolean
On Error GoTo errHandler
[Code] .....
ErrHandler:
MsgBox("Error Description: " & Err.Description, vbOKOnly, "Error")
SetFormAttributesToLoadInPanel2 = True
Exit Function
End Function
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Jun 29, 2011
On my vb.net 2010 form the textbox which has tab stop 0 does get the focus when the form is opened but the cursor is not blinking. I know textbox 0 has the focus because if you start typing right after the form opens the characters show there. The cursor property of textbox 0 is set to Ibeam. This is my first-ever VB 2010 form. My 2008 forms work fine and my workaround is to do the project in 2008.
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Oct 27, 2011
How to programatically find the Currently opened form's Name
/Active Forms Name
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Mar 22, 2010
I have a series of MDI child forms I page through to present learning material, all of which are borderless and framed within a main interface form. Each form has its FormBorderStyle set to None, and the form's Text property is blank. I am loading each fom on demand, rather than setting up a stack and pushing one to the front, as this is simpler for me with my limited programming experience.The problem is that as each form is opened/shown, the border briefly flashes in the centre of the ParentForm before docking in the top left corner as programmed. I have even tried coding the Form's Load event to make sure the border is set to None, as shown below:[code]This makes sure there is not a brief delay between the old form closing and the new one showing.
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Sep 27, 2007
Every once in awhile when I double click on a form in design mode (Windows Forms Application) that contains a tab control, all of the controls on the tab control disappear. I have to reopen the form to get them all back. In addition to this, the column order of my columns on any datagrid inside a tab control get rearranged when this happens. Is this a known bug and if so is there a hot fix or patch?
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Nov 7, 2011
Several years ago, I created a nifty data entry form that is called from a main menu. Due to recent user requirements, I had to create another form that is very similar to the data entry form. To prevent duplicate coding and testing, I created a class to inherit the existing data entry form. The issue is when I leave the class and return to a sub menu, the class is opening the main menu and the sub menu. How do I only return to the sub menu without the main menu appearing? Here is a snippet of my code. You'll have to scroll down to the very bottom to see the section that is causing issues. BTW, I coded the application in such a way that only one form should be open at a time.
frmMenu (main menu). This is nothing more than a bunch of buttons that allows the user to perform various functions.If user clicks button #1, open the data entry form:
Dim objFrm As New frmDataEntry
bolOkToCloseForm = True
Me.Close() '--- close the menu screen
[code]....
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Aug 21, 2010
I would like to know if its possible to show up a form in front of all other opened apps . Exemple : myapp.exe (is under of all those application) internet explorer , photoshop , windows live messenger. On event (for exemple on new message recived) myapp.exe will show up all over other forms.
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