VS 2008 Set Up App That Has Menu And Have Each Option Run On Different Thread
Mar 27, 2010
I am trying to set up an app that has a menu and have each option run on a different thread. When I set up 2 thread to run I get the following error: Current thread must be set to single thread apartment (STA) mode before OLE calls can be made. Ensure that your Main function has STAThread Attribute marked on it. This exception is only raised if a debugger is attached to the process.From what I have researched, it says to make sure the openfile dialog function should be used with the main thread only. Since I have <STAThread()> added above the main I'm not sure how else to handle this. The main thread needs to be listening for the menu options and if I change it around it runs that option and the other threads hang. [code]
View 4 Replies
ADVERTISEMENT
Aug 7, 2009
Two(2) Things. I don't have the "Clickonce Option" when I select BUILD for the menu bar. I also don't have the "Step Into Option" from my DEBUG menu. Do I have a problem? Or do I need to turn something on?
View 4 Replies
May 1, 2010
I did some research and i found that i will need to edit the registry.So if i make a folder called "Get Path" in the ContextMenuHandlers folder.When i click on the file in windows explorer or desktop etc i will have the option called "Get Path".Now for the value key what do i put inside?What i want is when the user right - clicks on the file my program starts up and displays the path of that file on a msgbox or listbox. I was thinking of letting the Windows Installer (.msi) doing this for me.
View 37 Replies
Jul 28, 2009
I want my console application to be able to do one function I have when you click one option on the windows context menu, and another function when you click another option.
View 3 Replies
Jun 10, 2010
I am writing a text editor program and I have written the new, open, save as, exit menu items but I am struggling with writing the save option.Now I have created the menu itself (well vb did, I just used insert standard items) but how do I code up the save menu option so that it updates the current document or if the documnt has not yet been saved bring up the save file dialog.Here is the code I have so far
Public Class Main
Private Sub NewToolStripButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NewToolStripButton.Click, NewToolStripMenuItem.Click[code]....
I know I have some finishing touches such as messages and error handling and stuff but at the moment I want to get all the basics working,I think the save menu option is all I am struggling with at the moment.
View 1 Replies
Aug 5, 2010
I have written an MDI text editor, its almost complete, but I cant get the save as menu option to work correctly.
HTML
'This sub routine controls the save as menu option
Private Sub SaveAsToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles[code].......
So whats happening is that it opens the dialog ok, saves the document to my chosen location correctly, but opens a new document and gives the new document my chosen file name and leaves my saved document with the file name New Document.But when I close all the open screens and then re-open my saved document its all as it should be.
View 1 Replies
Apr 2, 2009
I am learning Visual Basic Express 2008. When I follow step #5 below, the option Set as StartUp Project does not exist. How I can accomplish this. To create a test project for your class. Open the Persons project that you created in the previous lesson. If you did not save it, you will first have to go back to the previous lesson, Adding Methods to a Class, and complete the procedures.
On the File menu, point to Add, and then click New Project.
On the Templates pane in the New Project dialog box, click Windows Forms Application.
In the Name box, type PersonsTest and then click OK.
A new Windows Forms project is added to Solution Explorer, and a new form appears.
In Solution Explorer, select the PersonsTest project, and then on the Project menu, click Set as StartUp Project. In the Solution Explorer, select the PersonsTest project, and then on the Project menu, click Add Reference. The Add Reference dialog box appears.
Click the Projects tab, and then select Persons and click OK.
Double-click the form to open the Code Editor, and then enter the following declaration just under the line Public Class Form1.
View 7 Replies
Aug 1, 2010
I have written a sub routine for a Save>Menu option for a MDI Text Editor, see my code below
Private Sub SaveToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveToolStripMenuItem.Click
Dim f As Form2
[Code]....
Now if I take out the ( I get yet another error which states
"Argument not specified for perameter "File" of public sub WriteAllText(File as string, text as string, append as boolean)
All I want is when the user clicks the save menu item the document either saves the changes made to the current document or the save as routine is involked.
View 4 Replies
Mar 11, 2010
i have written a sub routine for a Save>Menu option for a MDI Text Editor, Please see my code below
Private Sub SaveToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveToolStripMenuItem.Click
Dim f As Form2
If f.Text = "Text Editor V.2 - New Document" Then
[Code]...
View 1 Replies
Apr 17, 2009
[Code]....
I add a button to a form each time the user clicks a menu option as:
[Code]....
This draws a small blue line at the bottom of the button to show it is highlighted. Just like the mouseoverbackcolor property on a button except this will draw the line. It works fine until you slide the mouse very fast between the buttons. It is as if the mouseleave event doesnt always fire.
View 2 Replies
Jun 24, 2010
I'm just trying to have my "exit" option in my menu strip remind the user to save their settings...If they haven't, the click "no" and save their stuff, and then exit. I can't get the form to close if I hit "yes."
[Code]...
View 4 Replies
Sep 10, 2010
how i can create menu ( in Taskbar) in my Program? this give me only the Option "ContextMenuStrip"
View 1 Replies
May 6, 2010
In VB 2008 Express, in the top menu, there is "Build" (Between Project and Debug), but it's not there in VB 2010 Express. I tried to find an option for it in Tools, but I can't find it. I can use the Build menu in VB2008 to build an .exe that shows up in the "Release" folder. What can I do to make an .exe as a release, so that I can implement it? If I was to use the .exe in the "Debug" folder, I can only run it in Debug mode.
In VB2010, I can right-click on the area near the toolbar and choose "build", which makes 2 buttons appear. I can click on the Build" button, but it does not create a new .exe in the "Release". Sorry if the solution is really simple, but I am a newbie, and I've only recently converted to VB 2010 Express. I can't believe how difficult this problem is!
View 9 Replies
Mar 22, 2010
Im trying to do this
[Code]...
But it will just skip to the last status (Label3.Text = "Status: Welcome")
View 7 Replies
Jun 10, 2010
im trying to terminate a threading.thread using thread.abort the thread runs a download connection so is usually in the middle of socket.recieve or socket.send or socket.connect when aborting i just want to terminate the thread no matter what thread.abort raises an MDA excpetion. so i ticked it off in the debug exceptions menu. now it doesnt raise an exception, but the thread simply wont terminate. my program wont close unless i press top in the debugger.i cant pause downloads because i cant terminate the thread this code wasn't working?
Dim vT As Threading.Thread
For Each vT In clsDownloader.DownloadThreads
If Not vT Is Nothing Then
vT.Abort()
[code].....
as for the exception concerning threads being aborted from other threads being dangerous, how is it possible to send a message from a main thread to another thread to abort itself? as far as i know the only way to a abort one thread from another is to just kill it (because i dont know of ways for a thread to communicate with another).
View 2 Replies
Oct 7, 2010
I'm firing a thread to unzip a file. I need some way of indicating to the parent that the unzip thread has ended. I've tried raise event in the unzip thread to a sub in the parent but this runs the sub from the unzip thread. With ApartmentState set to STA, so that I could use a save dialog, this was OK until I displayed a messagebox which was hidden behind the main UI(and whatever I did I could not get it to the front).
View 11 Replies
Aug 13, 2010
In one application, I need use 4 simultaneous threads.When the threads finished, I need to update the text of a TextBox.So, I create 4 Textbox, and I wanna the threads change the text to FINISHED.Each thread change one distinct TB.I use this "example"
Dim Terminados As Integer = 0
Private Sub frmEnviarMensagem_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Timer1.Enabled = True
Timer1.Start()
[code]....
The problem is, I have an error in the red lines.The error is: INVALIDOPERATIONEXCEPTION "Cross-Thread operation not valid: Control tbPlaca1 Accessed from a thread other than the thread it was created on."I don't use cross threading. Each TB only was accessed for the correspondent thread, and for the "main program".
View 3 Replies
Nov 3, 2011
This is the error message I am getting:
"Cross-thread operation not valid: Control 'Panel1' accessed from a thread other than the thread it was created on." The reason I am getting this error is because I am opening up a new form and then calling these three things:
Panel1.Show()
Label1.Show()
Label2.Show()
why I get this error message because it doesn't occur normally if I open Form2 after closing Form1, it only occurs when I open Form2 after closing Form4.
View 4 Replies
Jul 21, 2009
I have done a program using vb2005 to display reading from my microcontroller bs2 board but have encountered some problems. My code are as follows.
Dim Stop_Rx As Boolean
Private Sub btnRead_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRead.Click
SerialPort1.Open()
[code]....
I've encounter an error which is, (Cross-thread operation not valid: Control 'txt1' accessed from a thread other than the thread it was created on.)
View 7 Replies
Jun 21, 2012
When my client try to connect to server I'm getting this error : Cross-thread operation not valid: Control 'l_users' accessed from a thread other than the thread it was created on.
Private Sub _socketManager_onConnectionAccept(ByVal SocketID As String) Handles _socketManager.onConnectionAccept
l_Users.Items.Add(SocketID)
End Sub
View 3 Replies
Feb 17, 2012
Would anyone be able to help me here please. I'm fairly new to VB.net and threading so im just trying to figure out what is happening.When I debug this I am getting the error thread operation not valid: Control 'ProgressBar1' accessed from a thread other than the thread it was created on.
I'm a little lost as to why the error is occuring or how to fix it. I've had to put the progress bar in a separate thread otherwise the GUI crashes
[Code]...
View 2 Replies
Sep 2, 2010
My understanding is that thread.join will suspend the execution of code on the calling thread until the spawned thread finishes or is aborted...
With that in mind, I tried this:
For i = 1 to 50
threads = New Thread(AddressOf test)
threads.IsBackground = True
threads.SetApartmentState(ApartmentState.STA)
[CODE]...
However, the rest of the code runs when the loop finishes, not waiting for all the spawned threads to finish. Since the rest of the code needs the threads to finish (otherwise the rest will error).
View 4 Replies
Jun 6, 2010
I have written an application that loads a form - frmCad as well as AutoCad. It does this via a class which detects when AutoCad quits.
Friend Class CadApp Private WithEvents AppObject As AcadApplication... Private Sub AppObject_BeginQuit(ByRef Cancel As Boolean) Handles AppObject.BeginQuit RaiseEvent Quit() End SubEnd Class
My main class loads frmCad as well as CadApp.
Public Class Cad Private WithEvents frmCad As CadForm Private WithEvents app As CadApp... Public Sub ShowForm() If frmCad Is Nothing Then frmCad = New CadForm frmCad.Visible = True End Sub... Private Sub app_Quit() Handles app.Quit frmCad.Dispose() frmCad = Nothing .... End Sub
When I debug the program, it stops at frmCad.Dispose()The program continues to execute, but all the code after it fails to work.Looking more carefully I get an error message which contains:-Cross-thread operation not valid: Control 'Autocad' accessed from a thread other than the thread it was created on.
View 4 Replies
Feb 9, 2011
My error:Cross-thread operation not valid: Control 'label2' accessed from a thread other than the thread it was created on. I want to be able to give my Public RunBot() sub access to edit Labels, buttons, etc without an error.
[Code]...
View 8 Replies
Apr 1, 2010
I'm getting the 'System.InvalidOperationException' error on acccessing a thread from other than where it was created. My code is:
'Required by the Windows Form Designer
Public components As System.ComponentModel.IContainer ' changed from private
[code]....
View 3 Replies
Jun 6, 2009
My problem is Cross-thread operation not valid: Control 'statusHO' accessed from a thread other than the thread it was created on.
System.InvalidOperationException was unhandled
Message="Cross-thread operation not valid: Control 'statusHO' accessed from a thread other than the thread it was created on."
Source="System.Windows.Forms"
StackTrace:
[Code]...
i used it and it works fine then. but as it is mentioned its not a good practice to use it. So what should i do? is it ok if i use this as i am not able to use correct practice. Mine application is not for enterprise purpose. its just my class project, and it works fine even if i put application working in background. System works ok. I dont know how to correct this error.As i dont have that much knowlege of threads.
So please guide me how to fix this in correct way otherwise i am force to go for bad programming practice
Please refer to Windows Mobile Developer Center > Smart Device Development Forums > Windows Mobile Development > Appendtext not working for all my code details
View 1 Replies
Aug 4, 2009
Cross-thread operation not valid: Control 'lv1' accessed from a thread other than the thread it was created on.
Dim lvi As ListViewItem
For Each lvi In lv1.Items
[code]....
View 1 Replies
Feb 18, 2011
I have currently changed the color of background Menustrip using this code
[Code]...
How do i change the Hover color of menu items and dropdown menu items to orange including the background color which holds icons in menustrip dropdown.....
View 5 Replies
Feb 22, 2011
I really like the coding speed that vb.net provides, but I don't like the possibility to forget to declare variable types, return types of functions, etc. and that is why in each class I use[code]..
Is there a way to define those two options on the project/solution level?
View 2 Replies
Jan 26, 2010
the combo box style 1 has both the drop down option but also a manual entry option. I need to know how to code it so that when you manually enter data, it takes that data and places it in a text message "The shipping charges for "data" is $15" displaying in a text box. Shouldn't be hard but have developed a mind block.
View 4 Replies
