Force A Form To Implement Certain Methods?
Mar 21, 2012
I'm fairly new to VB programming. I have a control which is mounted within a form. I need to implement a callback, so that the control can make the parent form do something. My plan was to create a MustInherit class with MustOverride methods, and make the form inherit the MustInherit class. However, Visual Basic tells me that the form cannot inherit more than one class, which means that it can either inherit my MustInherit class, or System.Windows.Forms.Form, but not both.[code]...
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Mar 3, 2010
I am a C# programmer but I have to work with some VB.Net code and I came across a situation where I have two methods on an interface with the same name but different method parameters. When I attempt to implement this interface in a class, VB.Net requires explicitly declaring "Implements MethodName" after the method signature. Since both method names are identical, this is confusing the compiler. Is there a way to get around this sort of problem? I suspect this must be a common occurrence. Any thoughts?
N.B. This was more a case of the programmer not verifying that the interface in question had not changed from underneath him.
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Jan 13, 2012
I have the following
Private Structure FadeLabel
Dim Alpha As Byte
Dim Color As Color
[CODE]...
Which I picked up from this thread: [URL]
What I'd like to do is 'implement' the BringToFront method so that when I use the 'FadeLabel' structure I can also call it's method 'BringToFront'.
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Sep 28, 2010
I'm having an application which has to perform exporting and importing data. At the moment he runs those functions, I want a form to popup with an animated gif, so my client sees that the application is still running.But the animated gif stops sometimes, because he is busy doing stuff (like copying files, etc...)Is there a way to tell the form to refresh automatically every 0.1 sec, so the image runs fluidly. I tried to put a timer in my form, and start the timer as from the form is shown...the timer_tick says he has to refresh, but he doesn't want to do that.
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Jan 31, 2009
Is there a way to force a form to reload itself? The reason I ask is I have a listview that shows the data from my database. You can add information to the database from another form but when you go back to that form the information is not updated because the information updates on the form load. So my question is there a way to just do the form_load event again?
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Dec 10, 2011
I'm programming a Minesweeper clone in Visual Studio 2010, with VB.NET, as a Windows Form Application, and I'm having trouble with the Game Won and Game Lost forms. When I show those forms, I want the game form to still be visible, so that the player can see where the mines were, but I don't want the game form to be enabled until the Game Won or Game Lost form is closed. Exactly like Windows Minesweeper does when you win or lose.
[Code]...
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Mar 12, 2010
1. How do I force the Form to change its title through code? I tried: Me.Name = "New Title" during a button press, but that didn't work.
2. How do I make it so a form cannot be resized by the user at all? ie. they can't drag the sides.
3. I have made it to when I save in my application the status bar displays "Save Successful". How would I make it stay with that text a few seconds before displaying "Running..." instead?
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Aug 29, 2011
This is the original code in c#
public class CategoryRepository: RepositoryBase<Category>, ICategoryRepository
{
public CategoryRepository(IDatabaseFactory databaseFactory)
: base(databaseFactory)
[Code]...
Does anyone has an idea what i should change to let it work and let my UserRepository use the methods in RepositoryBase while implementing the IUserRepository?
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Jun 26, 2009
I want to create a simple form with 2 buttons, one to end the program and one to log the user off, I have done this successfully and have everything looking and working as it should. However, I want to force the user to pick one of these buttons before using the machine, my idea was to trap the mouse in the form so the only thing the user can do is select a button. My question is how can I do this?
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Jun 22, 2010
I have a component which hooks up with the paint event of assigned control and draws on its surface, Whenever i make any changes to the component i need to resize the form or control at design time in order to see the changes.
I want to ask if there is any other way to refresh the contents of a control at design time which forces it to redraw.
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Nov 24, 2011
I am just wondering how to force the creation of a handle of a control before the form that it is contained on is loaded... I have tried:
[Code]...
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Jun 23, 2011
When multithreading in VB, if you close the form while different threads are running, the process itself will not end. Is there a way I can force all threads to end, or end the process like in the Task Manager, when the form is closed?
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Jun 29, 2010
How can I view the methods that are hidden within objects please? For example I have a listview vbLstVw - But the only method I can seem to access is by double clicking it to get the
lvwPrac_SelectedIndexChanged
But I know theres more! (I don't know what there called, but for example):
lvwPrac_Initalize
lvwPrac_1337functionOfD00m
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Apr 21, 2009
I want to add some action to my form when it is closed by clicking on the "X" button in the upper right corner of the form.How is this done? I suspect that i must add a handler for some event, but which event is it?
Currently i am using the closing event, but i dont get it to work properly.
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Jan 7, 2009
I find that if I do me.close and then reopen the form with showDialog later, things are as they were before I closed it. If I use me.dispose and then later open the form again, its as if it was never opened before. Are these two both valid methods for leaving a form?
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Jun 24, 2011
I am working with a vb program, but there is something strange on one of my .vb code pagewhen i put the "dot" afther the object name its dont show the methods availables for this objectbut on other vb code pages i can see it. but in this one no.for exmaplethis is a piece of code: Dim sb As New StringBuilder()
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Mar 29, 2010
I am not sure how clear my question is by the title, but I am trying to make Class methods instead of Instance methods in Visual Basic that way I don't have to waste memory and code creating temporary objects to execute methods that don't need instance variables.
I am not sure if you can do that in VB but I know you can in Objective-C by using either a "+" or "-" sign in front of the method declaration. And in C++ (at least I think, I can't remember) you put the static keyword or const keyword in front of the function.How would I do this in VB if it is possible? Or should I just make a separate set of functions that are not members of a class?
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Sep 29, 2010
control that contains a button. the user control is placed on my main form. when the button on the user control is clicked I need to to call a method that is located in the mainform.vb
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Aug 9, 2009
control that contains a button. the user control is placed on my main form. when the button on the user control is clicked I need to to call a method that is located in the
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Mar 6, 2010
How to implement checKboard effects in VB 6.0 form
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May 15, 2011
I'm working on a Windows Forms application with a module, and I want to put a time delay in the module rather than a form.
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Oct 29, 2009
May i know how to implement the case sensitive detection in VB for the login part, so if a user registers in "key" for his password and keys in "KEY" for his login, the system will actually kick him out.[code]...
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Aug 4, 2010
I have ran into a slight problem and I have not met this issue before today.If I create a Form at run-time with a Button on one Form using a LinearGradientBrushhow can I make the Form maintain the gradient when it is Maximized for every Form that is generated?urrently, if you create 2 Forms using the code below, select the 1st Form created and Maximize it, you will see the problem.This problem does not exst for the currently generated Form however. :-)Would I need to maintain parallel Lists Of Forms or / and LinearGradientBrushes or / and ClientRectangles?
Option Strict On
Imports System.Drawing.Drawing2D
Public Class Form1
[code].....
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Aug 30, 2011
implement an algorithm to drag-and-drop a picturebox in my form. For example, what Windows does when i want to drag and drop files (or folders) on my desktop.
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Mar 17, 2011
We were using the parent's FormClosing event handler to get user confirmation of the exit before continuing, but have just discovered that the child windows get closed before this is run. We only want a single confirmation message box, but I guess that would require the child windows to ask the parent to confirm.
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Oct 16, 2009
In the following code, a local printer dialog box shows and its choices are implemented in the printout, but if the user goes to a 2nd-level printer dialog box such as by clicking an Advanced or Properties button, choices made therein (such as landscape/portrait or scaling) are not implemented in the printout (prfPrintForm is a PowerPacks.Printing.PrintForm on form frmPlotTrends). Is there something else that must be done to make the 2nd-level dialogs work?
Dim dlrResult As DialogResult = frmPlotTrends.dlgPrintDialog.ShowDialog()If (dlrResult = DialogResult.OK) Then frmPlotTrends.prfPrintForm.PrinterSettings.PrinterName = frmPlotTrends.dlgPrintDialog.PrinterSettings.PrinterName
frmPlotTrends.prfPrintForm.PrinterSettings.Copies = frmPlotTrends.dlgPrintDialog.PrinterSettings.Copies
frmPlotTrends.prfPrintForm.Print(frmPlotTrends.prfPrintForm.Form, Printing.PrintForm.PrintOption.ClientAreaOnly)End If
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Jun 18, 2011
is there a way to implement a win7 drop shadow style into border less form?
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Nov 16, 2010
I'm trying to execute different code depending on the button clicked (button 4 or 5) on Form1, but when I click on button5 to activitae the code on the Form2's Load event everything is Ok, but when I click the back button to return to Form 1 and click on the Button4 to activate the code on the Form2's Load event again, it doesn't active the Form's Load event, is there a way to form the form load event every time I access it from Form1? [code]
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Sep 11, 2011
I have a simple GUI form to hide / show / minimize / terminate / force terminate Processes. i can do all well but for show and hide i need the MainWindowHandle to show or hide it
So here is hide process code:
Dim Proc As New Process = Process.GetProcessesById(List.SelectedRows(0).Cells(1))
Dim hwnd = Proc.MainWindowHandle
ShowWindow(hwnd,0)
If i try the same with show code:
Dim Proc As New Process = Process.GetProcessesById(List.SelectedRows(0).Cells(1))
Dim hwnd = Proc.MainWindowHandle
ShowWindow(hwnd,9)
The MainWindowHandle become 0 cuz its hidden is there is any other way to get the MainWindowHandle of Process ?
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Aug 26, 2010
Public Class Form1 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim someproc As Process
[Code]...
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