C# - .NET WinForms - Listen To Events For System LogOff - User Locked - Hibernate Started And System Resumed?
Feb 11, 2010I want to listen to events in my windows forms .NET application for the following system wide events :
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Shutdown/LogOff/Hibernate Scripts?
Nov 25, 2009I'm making a screensaver with the added option of shutting down/oggingoff/hibernating/sleeping at a user-defined time. Now, I'm fine for all my code except for the scripts for these events.
View 1 RepliesDetect If The System Is Going To Sleep Or Hibernate?
Feb 18, 2011I have an application that detects a Power mode change using.
SystemEvents.PowerModeChanged
if there is a way to detect if the system is going to sleep or hibernate?
VB Or C# - Run App In System Tray And Listen To Keyboard Input Without App In Focus
Mar 28, 2010I want to make an app which on loading sits in the system tray and even after I open another program (say notepad or vlc or anything) i.e. even when the app is not in focus and if I press "G" on my keyboard, the tray icon should show a tool tip - "key G is pressed". I have tried several codes but nothing works when the app goes out of focus. I can use Register Hot Key [url] but it needs a modifier also (like Ctrl or Alt etc. along with my key G). So, is there any way I can achieve this? something which many tray icons do like antivirus apps, etc. and I do not want to use AutoHotkey application.
View 2 RepliesShut Down The Computer When System Is Locked?
Nov 12, 2009I've noticed that a few download management programs do this, like uTorrent for example, where you can set it to shut down the system when the download(s) complete and I would like to implement this in my app as well.Right now I'm usingProcess.Start("shutdown.exe", "-s -t 05")which works fine if the user is logged in, but my home computer has the screen saver set to lock the computer in which all my app does is exit but the system doesn't shut down like it does when it's logged in.
View 2 RepliesExecute Some Code While System Is Locked And Relogin?
Mar 16, 2012I have an application where i run a code when user logoff using below code
AddHandler SystemEvents.SessionEnding, AddressOf ClosingApplication.Where CloseApplication is procedure that is called.same way i want to add handler on system lock and relogin
Resolved Shut Down The Computer When System Is Locked?
Sep 21, 2010In uTorrent the system shuts down whether the user is logged in or the system is locked, how is that possible?Also I would like to know how to detect if the system is locked or not because if they are logged in I, like uTorrent, would like to prompt the user that the system is about to shut down and give them 30 seconds to cancel it.
In addition to
Process.Start("shutdown.exe", "-s -t 05")
I also know about
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VS 2008 : Shut Down The Computer When System Is Locked?
Nov 12, 2009I've noticed that a few download management programs do this, like uTorrent for example, where you can set it to shut down the system when the download(s) complete and I would like to implement this in my app as well.
Right now I'm using
Process.Start("shutdown.exe", "-s -t 05")
which works fine if the user is logged in, but my home computer has the screen saver set to lock the computer in which all my app does is exit but the system doesn't shut down like it does when it's logged in. In uTorrent the system shuts down whether the user is logged in or the system is locked Also I would like to know how to detect if the system is locked or not because if they are logged in I, like uTorrent, would like to prompt the user that the system is about to shut down and give them 30 seconds to cancel it.In addition to
Process.Start("shutdown.exe", "-s -t 05")
I also know about
<DllImport("user32.dll")> _
Public Shared Function ExitWindowsEx(ByVal uFlags As Integer, ByVal dwReason As Integer) As Integer
End Function
Call ExitWindowsEx(1I, 0I) 'Shut Down
but this doesn't shut down the system if it's locked either.
VS 2005 - Login System - Application Which Has User Authentication System
Apr 1, 2009I'm writing an application which has user authentication system, basically, when the user open the software, he has to enter his/hers username and password which are retrieved form a access data base, and if the user is set as admin then it enable some features, I couldn't figure out how to read the column lets say, IsAdmin table, which will store an value of 1 or 0 for example. I need a concept of how build a login system with levels or whatever you guys call it...
View 2 RepliesForms :: Access Contextmenu For A System Tray App Started Using Applicationcontext
Jan 10, 2012I'm having trouble figuring out how to access my system tray context menu from a winforms opened up from one of the menu choices. The task notifier was created using a module and an applicationcontext so I could start the application without a form.
Here is m simplified code.
Module Module1
Public OpenFormsHash As New Hashtable
Public Sub Main()
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When I start my form, in this case fSettings, I can't figure out how to get access back to my context menu. I'd like to modify it based on events that happen on the open form (fSettings).
Capture SHUTDOWN And LOGOFF Events
Apr 5, 2012I am trying to capture SHUTDOWN and LOGOFF Events, so that I can be alerted when my process stops. The below code works in detecting these events. I am trying to get it to release the monitoring of the system events after the email has been sent, Being newer to VB, I am not sure how to do this. I copied this code from another google forum.
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Add An Item To System Menu In WinForms?
Apr 28, 2010I'm trying to add an item to the system menu of my WinForms application. The following is the snippet of code I'm using. When this runs I can see the separator line added to the menu, but my 'About...' entry isn't added. I'm using VS2008, and running on Windows 7.[code]....
View 1 RepliesListen To Events From A Windows Service?
May 10, 2011Not surer if I know exactly how to ask or phrase this questions/discussion.I have a windows service that listens to a COM port for GPS data and send the information out through a UDP port to a listening application (VB6 app). I have a UI front end for the service that I would like to listen or watch the data and do some other things with the data.
The service raises an event in which I would like to have my UI listen to. Now I'm guessing that since my UI is on one thread and the service is on another, if I add a handler to the event, it may never pick it up.
Therefore, I am wondering how can I listen to the events from a sperate UI application. I heard a lot about Remoting, but my concern is configuration; our end users are not technical at all and not sure what is involved...and I'm not that familair with Remoting.
Adding An Item To The System Menu In WinForms?
Jun 26, 2006Adding an item to the System Menu in WinForms
View 5 RepliesWinforms: Closing A Program To System Tray
Oct 1, 2011'This is the event that is fired as the application is closing, whether it 'be from a close button in the application or from the user 'clicking the X in the upper right hand corner
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Im trying to make an application that when you press X, the program gets put in system tray. But i have like no idea how i'm suppost to do that, so did a search on google and found this code. Only VB2010 (what i use) doesn't like the fourth line. Can anybody give me a quick tutorial on this, and make this work in VB 2010?
Remove System Default Events?
Aug 5, 2009I am trying to remove the "System" or "Default" events in a vb .net custom control. i dont want them to appear in the list once added to the form. [code]...
View 3 RepliesDeveloping An Winforms Based Event Tracking System Using .Net?
Sep 24, 2009I'm looking for some advice for an application I currently developing. I'll try to keep this as brief as possible so if additional info is need just let me know.I'm developing an Winforms based event tracking system using VB.Net (VS 2008 Pro). The application collects data via serial bar code scanners and stores this data within a MS SQL Express db located on the same Windows XP Pro workstation that the application is installed on. When the application receives the formatted string of data it checks the db table and sends a reply back to the device indicating whether the data is a duplicate. I have written a PortManager class to handle the serial based devices and this functionality is working well.
I have now been asked to incorporate a new type of collection device into the system. The new device is running embedded Linux and uses TCPIP (POE) rather than serial communication. The device manufacture has assured me he can provide a string from the devices integrated scanner in the same format as my serial based devices.
If possible, I would like to utilize the current application and just add the ability to use the TCPIP devices to it. I was thinking it might be possible to just add a new class (similar to my Port Manager class) to handle the TCPIP based devices.I'm really at a loss as to the best way to approach this. I'm just not that familiar with collecting data from a Winforms application using a TCPIP based device.
System.Windows.Forms Sequence Of Events
Oct 6, 2009Which form events fire when a form is minimized, restored and maximized.I am trying to draw lines on a PictureBox control, but cannot get the draw subroutine to run after the form has been restored from a minimized windowstate.I probably should know this answer, but I have not written much code in the last 4-5 years and am relatively new to vb.netAlso.
View 6 RepliesWhen Using Mouse Events And E As System.Windows.Forms.MouseEventArgs
Oct 12, 2010When I use e.X or e.Y I get the X,Y coordinates of the mouse and it works fine.But when I use e.Button I get long numbers.
Button 1 = 1048576
Button 2 = 2097152
Button 3 = 3145728
And so on...
Why does it return these large numbers? Why not 1, 2, or 3?Is there more data in those large numbers?
Cannot Import System.Windows.Media.Imaging And System.Windows.Forms Or System.Reflect?
Mar 16, 2009With the following imported namespaces in my project :
Imports System.Windows.Forms
Imports System.Reflection
.. I cannot add..
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Winforms - Load System.Drawing V4.0.0.0 On A Windows Form In Visual Studio 2010?
Mar 4, 2012I've decided to learn Visual Basic .Net as this is what some of my colleagues work with, and this will allow me to work with them on projects.I have purchased Microsoft Visual Basic 2010 Step by Step and downloaded the sample files. When I am trying to debug the first sample application (a Windows form), it is telling me that it can't load System.Drawing V4.0.0.0. However, if I create a new Windows Form application (C# or VB.Net) this works fine.
I had a look at the References tab in the project settings and System.Windows.Forms is referenced, but the version referenced is 2.0.0.0. I have removed and re-added this reference and it stays at 2.0.0.0 and I still get the error.Does anybody have any ideas as to what may be going on?
IDE :: DataGridView1_CellLeave(sender, New System.EventArgs), Unable To Cast Object Of Type 'System.EventArgs' To Type 'System.Windows.Forms.DataGridViewCellEventArgs'.
Jun 27, 2011VB 2008, DataGridView,DataGridView1_CellLeave(sender, New System.EventArgs)
"Unable to cast object of type 'System.EventArgs' to type 'System.Windows.Forms.DataGridViewCellEventArgs'."
What is the Correct String for "New System.EventsArgs"
Anybody there is to help me out.
Error - LINQ To Entities Does Not Recognize The Method 'System.Object IIf(Boolean, System.Object, System.Object)'
Jul 29, 2011I am getting following error whenever I want to use IIf function inside entity framework query.
LINQ to Entities does not recognize the method 'System.Object IIf(Boolean, System.Object, System.Object)' method, and this method cannot be translated into a store expression.
Method 'System.Object CompareObjectEqual(System.Object, System.Object, Boolean)' Has No Supported Translation To SQL.?
Apr 16, 2010What do I need to convert?
Dim CEESearchByAppNo = From CEEsearch In dbCEE.tblScanneds _
Where CEEsearch.AppNo = iAppNo
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C# - Kill Process Started With System.Diagnostic.Process.Start("FileName")
Oct 2, 2010I am trying to create an app that will perform actions on specific times (much like the Windows Task Scheduler). I am currently using Process.Start() to lunch the file (or exe) required by the task. I am initiating a process by calling a file (an .mp3) and the process starts WMP (since it is the default application), so far so good. Now I wan't to kill that process. I know that it is normal behavior for the Process.Start(string, string) to return nothing (null in C#) in this case. So I am asking how can i close WMP when I called it through Process.Start(string, string)??
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IDE :: WinForms App Created Is Not Visible When Started By Vista Task Scheduler
Apr 28, 2010It is a funny problem and I am wondering if anyone else has encountered the same problem using vs 2010 express on Vista Business. I can't tell if the App is running because I do not want to risk corrupting the sql 2008 express database.
View 6 RepliesUnable To Cast Object Of Type 'System.String' To Type 'System.Predicate`1[System.String]
May 13, 2009I am getting the following erro message: "Unable to cast object of type 'System.String' to type 'System.Predicate`1[System.String]'." on the line of code: If Not StrgFrag.Exists(wrd) Then I was expecting a True/False response and assumed it would work given that wrd is a String variables and StrgFrag in a List(of String). Do I need to reference the wrd variable differently? Dim StrgFrag As New List(Of String)
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Error: A First Chance Exception Of Type 'System.InvalidOperationException' Occurred In System.Data.dll
May 5, 2011I am using VS 2008, Office 2007, and Win7 Home Premium on my system.I have a simple application which should be a breeze to build. All I am attempting to do is pull data from an Access database with four small tables into a data grid on a windows project. Should be simple, set up the data connection, choose a datagrid from the table in the data source view, drag it onto the page and done, right?I can't get it to work. It will all work fine until I attempt to run or debug the project. The data will not show up. The data grid does, but I get this error: A first chance exception of type 'System.InvalidOperationException' occurred in System.Data.dll
As I said, the project seems to build fine, but it will not pull the data. After the initial build I get the message that Windows will show this page in Compatibility View. Is it something with Win7 Home Premium, or a setting somewhere?
System.io.fileinfo Cannot See A File In System Folder On Windows Server 2008 64bit
Jan 28, 2010I have a utility that is a simple exe that is not installed compiled with VS2005 and works well. But when I upgraded to VS2008 the utility can no longer locate files in the active system folder. I have UAC turned off and am logged in as the Administrator and it still can not locate a file that I can see in Windows Explorer. The file I am looking for is PakMgr.exe.
View 1 RepliesSystem.TypeInitializationException: The Type Initializer For 'System.ServiceModel.ClientBase' 1' Threw An Exception
Dec 22, 2009I'm using express 2008 build the windows app. and in the app, it calls a webservice which was built by VS2003.It works fine on most PCs. however, there is one PC, it always shows this error:
System.TypeInitializationException: The type initializer for 'System.ServiceModel.ClientBase' 1' threw an exception
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System.configuration.ConfigurationErrorException: Configuration system failed to initialize ---> System.Configuration.ConfigurationErrorsException:
Unrecognized configuration section system.serviceModel
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however, the configuration file was generated by express 2008, and it seems there is no error.
