.net - RemoveHandlers On The Base Form?
Feb 8, 2010
I wonder if I can remove all added event handlers in all the child forms from the one base form in the Closing method. (VB.NET; .NET 2.0)Background: In a project I analyze a memory problem. I verified with the memory profile (see related question) and find out that some forms are not collected by the GC, probably because of the EventHandler non-removed references.
In the project all the forms inherits from the BaseForm. Now I search I way to remove in the OnClosed method foreach Control all the EventHandlers to/from the ChildForms.
View 2 Replies
ADVERTISEMENT
Mar 19, 2010
I use to set WithEvents variables to Nothing in Destuctor, because this will "Remove" all the Handlers associated with Handles keyword. Will this have the same effect for derivated classes?
[Code]...
View 1 Replies
Jul 13, 2009
I want to add a MDI parent form to a panel on a base form, the problem is that i must set the toplevel = false when add the parent form to the base form, but if i set its toplevel to false i can't set isMDIParent parameter to true. how can i fix this conflict?
View 1 Replies
Jun 3, 2011
I am getting following error when I am trying to use Convert.FromBase64String "The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or a non-white space character among the padding characters."
Dim payloadBytes = Convert.FromBase64String(payloadBase64)
Basically when my facebook registration form [URL]mphone field has a dash in it and encoded string is posted to other page and I am trying to decode it there which creates this error. Basically I am trying to extract data from Facebook Signed Request.
View 3 Replies
Jan 13, 2010
I'm working on a simple base form in which all the other forms in the project will inherit.This base form only adds 5 properties (at the moment) dealing with painting a gradient background. The problem I'm facing right now is when I change a property on Form1 (the test form) and click run it doesn't show that change. I also checked the .designer.vb file and when I make a change it's not added to the code behind file, I'm at a loss right now to why
View 5 Replies
Apr 29, 2010
I'm developing a software that handles very specific regional standards. In one part of the country they have different standards for entering this data than they do in other parts of the country. In fact there are hundreds or thousands of possible configurations that would be best in various regions.
The solution I've come up with is to write a program that can load different control configurations with the supporting code to its main form at runtime. I do not know how to accomplish this. Would I use visual inheritance at runtime? Would I use a plugin system? I just need to potentially allow a power user to design thier own interface or to modify an existing interface to better suit thier needs.
Edit: Is there a way to define the base class of a form at runtime? Could I create user controls in a plugin and pass them in to the host program?
View 3 Replies
Dec 24, 2009
i want to save the form name in data base and load form using that saved name. How would we achieve this task?
View 5 Replies
Feb 13, 2011
how do i make a login and registration form with a sql database so you can login on any computer in vb
View 1 Replies
Jul 27, 2009
Base form baseForm generate an array of childForm (3 fo them). I have one event handler in baseForm which is called when user close each childForm. The problem is that this event handler is only called when the last childForm is closed. When other childForm is closed, the event handler doesn't do anything.
View 7 Replies
Jun 9, 2010
I created a base form that has a specific size and an icon as a base for all forms created in my project (to be consistent in looks). The problem is, for some reason if I add a Text box to the Child form, I can no longer execute shortcuts like Copy (CTRL+C) etc into the Textbox.
What should I do to handle this OTHER THAN writing code to capture those on the KeyUp control?
This is also the case for RichTextBox control as well.
View 1 Replies
Jul 15, 2010
I have a base form and I am trying to get the DataSource of the ActiveControl if the control is a datagridview.What I have so far is:
Dim curControl As Control = Me.ActiveControl
Dim ControlType As String = curControl.GetType.ToString()
If ControlType = "System.Windows.Forms.DataGridView" Then
[code].....
View 4 Replies
Aug 10, 2009
I happen to have these common procedures which I want to be used in my forms and usercontrols, with the form I can put those procedures in the base form which is being inherited but I happen to have a need to use those same procedures in my usercontrols, is there a way that I can have a common base class that I can use both for my form and usercontrol? I haven't used yet a base usercontrol since my usercontrols will not look the same so I have to put those procedures in each one of them and I find it rather cumbersome.
View 8 Replies
Apr 3, 2009
I am migrating my code from vb.net 1.1 framework to vb.net 3.5In my windows application, the base window has some buttons and events are written for the same.I have shortcuts defined for these buttons also, for example: ctrl+d, DEL (keyboard) etc.Now i open a property Grid form on top of my base window for a selected object.Even when the focus is on this property grid, i am noticing that my base window events are firing on pressing those shortcuts.
example:I select some text in my property grid and hit delete button from keyboard. The delete event that i have written for the selected object gets fired and the text is not deleting.I fail to understand why is it happening. It wasnt behaving like this in .net 1.1.In .net 1.1 it would delete the text and only when the focus is back on the base window, hitting Delete would call the event.How do i control such a behavior? Is there some property that i need to set for property grid in .net 3.5 to prevent base window events from firing till the time focus is on property grid form?
View 1 Replies
Sep 6, 2010
I can quickly knock together soem code to xlate base 10 to/from bae 13, but I just wondered if something very easy already exists in VB.NET (or even somethign generic, with base N, but right now I am only looking at base 13)
View 1 Replies
Jun 4, 2011
I am making a TabStrip control to hold a number of tabs just like TabControl, but only with the tabs, no page. The control has a "Tabs Collection", which stores a list of "Tab" class. "Tab" is not inherited from Control, but each tab has its events. So when the user add a "Tab" in the "Tabs Collection", each "Tab" instance should have a (Name) identifier, which user can access it in the code, and with WithEvents keyword so users can add event handlers to each "Tab". The expected out come should similar to this:
Friend TabStrip1 As TabStrip
Friend WithEvents t1 As Tab
...
Me.TabStrip1.Tabs.Add(t1)
[Code]....
View 3 Replies
Jul 24, 2011
I am sorry to keep bothering you about this damn DataGridView control ... As you might have noticed I am having a hard time with the DataGridView control ... My latest problem has to do with updating the data base file (Access) through a DataGridView control .
Up to now I have managed to successfully edit an entry in the DataGridView control and moreover to successfully update the data base file itself .
The above form and its code work fine . The problem starts when I am trying to run the code of the Update button from another form .
You see , I have another form , through which I change the contents of some of the cells in the DataGridView control (back in Form1) . What I want next is to simply update the data base file itself , just like I was doing with the button in the first form , after I manually changed the cell in the DataGridView control .Thus , on the second form I have a button with this code :
Form1.Button1_Click(Nothing, Nothing) (of course the Click event is declared public)I have also tried :
Form1.Button1.PerformClick()
but still nothing ...Although Form2 successfully changes the cells back in Form1 , the data base file itself does not get updated ...If I manually press the Update button in Form1 I once again successfully update the data base file , but I want to do the whole thing by calling the Update button from Form2 .
View 5 Replies
Jul 22, 2009
Specifically I have fractal hour... in base 100... that does not reflect what the true minutes/seconds left that it represents
View 2 Replies
Oct 1, 2008
I've been creating short test apps repeatedly to try to understand some of the concepts in VB.NET.For the most part it has been illuminating.I read Bucky's .NET knowlegebase tutorial on passing objects as parameters to newly created forms. He shows how to create a new class that inherits from the base form class and define a New() method with parameters Extending the concept I thought about doing the same thing with a form that was created at design-time (In this case Form2).
[Code]...
View 6 Replies
Oct 27, 2009
I placed this checkbox named owner on my form. When i build the project i got the error as
Quote: 'owner' conflicts with property 'owner' in the base class 'Form' and should be declared 'Shadows'
[Code]...
View 10 Replies
Jan 26, 2011
Yesterday I started my first DLL project which is for ArabicMessageBox that will allow arabic programmers to display there message in totally Arabic message.My project contain one Form only, and the basic code that I use is:
Public Overridable Function Show(ByVal APrompt As String) As MsgBoxResult
mLoad(APrompt, MsgBoxStyle.OkOnly, "")
Me.ShowDialog()
[code]....
View 9 Replies
Apr 15, 2010
I have put this code in the global form Inherits System.Windows.Forms.Form. And then in the form that will inherit this from the global Inherits MenuStrip. "MenuStrip" is what the global form is called. But keep getting this error: Error1Base class 'MenuStrip' specified for class 'Lesson2' cannot be different from the base class 'System.Windows.Forms.Form' of one of its other partial types.
View 5 Replies
Jan 31, 2012
I'm retrieving data from Excel and would like to keep my arrays 0 based but Excel returns 1 base. Is there a fairly simple way to return change the array from 1 to 0 base? Or do I just need to create a loop? Here's an example code right here:
[Code]...
View 1 Replies
Jun 24, 2010
I have a base form and I inherit other forms from it. However, if i go back and change say the size of the base form, I don't see those changes take effect in my inherited forms. Does anyone know why that is? Is there a solution to this issue?So as far as design is goes, what exactly gets inherited by other forms?
View 9 Replies
Mar 12, 2010
When I do this
Public Class cInherits : Inherits Panel
I get this: Base class 'System.Windows.Forms.Panel' specified for class 'MenuButton' cannot be different from the base class 'System.Windows.Forms.UserControl' of one of its other partial types.
How do I inherit?
View 4 Replies
Jun 22, 2010
In old QBasic I could use the LOG function to get the base-10 log of a number. So I would have something like this...
sglFormula = 150 - (LOG(intTemp + 10) * 30)
... the LOG function would give me the log base-10 of a variable (intTemp) plus 10.How do I do this in VB.NET. Do I have to create my own log function and, if so, what would it look like?
View 2 Replies
Oct 19, 2009
What is the base class of .NET?
View 2 Replies
May 19, 2009
i have a base class which declares the event StatusTextChanged. My child class, of course cannot directly raise this event.
[Code]...
View 5 Replies
Mar 16, 2011
When referencing a method's address, should we take into account the overriding or not?
Class B
Inherits A
Overrides Sub Foo
[code].....
View 2 Replies
Feb 16, 2010
To quote from the ConQAT - Continuous Quality Assessment Toolkit website Long-lived software systems are subject to gradual quality decay if no counter measures are taken. Continuous quality control counters this decay through an orchestrated application of constructive and analytic quality assurance techniques. The Continuous Quality Assessment Toolkit ConQAT provides the tool-support required to enact continuous quality control in practice. It supports the rapid development of quality dashboards that integrate diverse quality analysis methods and tools.However before I spend lots of time looking at it, is it usefull for a VB.NET project?
View 1 Replies
Mar 5, 2010
When you create a webpage in ASP.net, the codebase inherits System.Web.UI.Page Now when I extend the page object to check for SessionExpired for example, I create a new class and inherit from system.web.ui.page, and overwrite some functions. The problem then is that on each page, I have to replace system.web.ui.page with my custompage class. Is there a way to extend a class by adding methods or modifying its methods directly (e.g. add the sessionExpired check to System.Web.UI.Page) ?I'm using .NET 2.0
View 2 Replies
