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]...
I've made an app with vb 2010, which holds a mainform. On it is a menutoolstrip with button, when I click on that button a second form is opened on a second monitor and the button is being checked (different color).
When I click the button again, it is unchecked, but the form on the second monitor is still open, while it should be closed.
Here is the code I use:
CODE:
I looked at the Dispose() method in System.Data.SqlClient.SqlTransaction (using a decompiler):
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Why does everyone say in forums that it is Rolling back in the dispose? Where does it rollback?
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.
I attempting to dispose / close a startup form from a sub. Basically, I using the filesystemwatcher to watch for file creation, if the file is created, run some code and close the form.how to pass in some reference form. Using and new to vs2008. A bit of leap from VB 6.0.
Imports System.IO
Public watchfolder As System.IO.FileSystemWatcher
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
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I am using VB.NET (Visual Studio 2008) and thus .Net framework 3.5. I have developed an application which has a MDI form and then has several other forms, most of which are shown using form.showdialog and some set of forms are shown using form.show.Whenenver a form (shown using form.showdialog) was closed (usually by clicking on a button (OK or Cancel)) I wrote code Me.dispose. After careful testing and R&D I figured this caused flickering on the screen. There use to be a flicker on the screen and it looked weird.In some rare circumstances if I clicked on button and form closed using me.dispose the focus of application was lost and some other program that was running came on focus. (This has happened but was rare.)Now the reason I used disposed was that after a form was shown using .showdialog I didnt want its contents to be in memory so I used the .dispose thing. But I noticed that If I use form.close then there is no flicker and form closes fine. But I think that would not dispose the form from the memory.
What should I do so that form closes and is disposes as well without any flicker.?I read on net that for forms shown using .show it gets disposed off automatically the moment it is closed (by using me.close) or user clicking on cross. Is this true? I also think that If I call a form using showdialog then I can write formx.dispose from where I am calling and not in the form itself.
I have a settings form and a main form the main for collects information from the settings for and stores it into variables (public XXXX as string) but on my Save button it is supposed to save the information in the main form and show the main form. But it get an error on the first line containing: "MainForm.VARIABLE", The innerMessage says it cant create the form or something, but here is the code from my save button:
(I know that this isn't the right block of code because this doesn't really show anything, but if anyother code is required then just tell me and ill post it. The error actually occurs on "MainForm" itself, how do i fix this?)
Error is: An error occurred creating the form. See Exception.InnerException for details. The error is: Object reference not set to an instance of an object.
Dim r As New Random
MainBot.Max = txt_Max.Text
If RB_Manually.Checked = True Then
[CODE]...
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
View 2 RepliesIam 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?
View 1 RepliesI am trying to dispose of a form in order that I may recall it later. But for some reason it is not being disposed.
Dim anything As Boolean = False
frmMoreThan5.Close()
frmMoreThan5.Dispose()
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I am using VB.NET (Visual Studio 2008) and thus .Net framework 3.5. I have developed an application which has a MDI form and then has several other forms, most of which are shown using form.showdialog and some set of forms are shown using form.show. Whenenver a form (shown using form.showdialog) was closed (usually by clicking on a button (OK or Cancel)) I wrote code Me.dispose. After careful testing and R&D I figured this caused flickering on the screen. There use to be a flicker on the screen and it looked weird.
[Code]....
I am using Vb 2008 Express Edition. I have only 1 form with 10+ arrays. My app runs a few calculations and finally plots 2 graphs. The first time I run my program, everything works fine. But when I run my app with a new set of data it gives me the wrong results. Is there a way I can force my form to reload itself and act as if its running for the first time? I know I can do an Application.restart. But I don't want to restart my app every time.
Me.Refresh() doesn't work, as my form still seems to remember my old data set (array)
<System.Diagnostics.DebuggerNonUserCode()> _
Protected Overrides Sub Dispose(ByVal disposing As Boolean)
Try
[code].....
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.
Two Forms 1. "SplashForm" 2. "MainForm" I want to load "MainForm" AS background Process of "SplashForm" process when "SplashForm" process end i just want to show the "MainForm" which should be already loaded code
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I'm trying to fix all my project warning according to Microsoft code analysis (CA:XXXXX) One of the warning is "CA2000: Dispose objects before losing scope" My Code is:
[Code]...
I have question regarding how i can check if the form is opened or not ??
View 2 RepliesI 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(",")
Is there a way to have a form within a program that doesn't dispose when you close it? I have a form in my project and a menu item to show it. When I declare the form globally and show in menuItem.click, then the click event breaks because the form no longer exists. When I declare the form within menuItem.click, then this creates a new form every time I click and that's not what I want.
View 1 RepliesI 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]
View 1 RepliesIf I have a form open already that is not modal, can I turn it modal by the click of a button on that form.
View 1 RepliesI'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?
View 28 RepliesI 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.
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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.
View 4 RepliesI 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
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
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Do you mean, "opens a file" or "is opened with a file"?
View 1 RepliesOn 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.
View 7 RepliesHow to programatically find the Currently opened form's Name
/Active Forms Name
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.
View 3 Replies