Reading The Windows Event Log?
Oct 19, 2011
I want to search the windows security event log to determine if a certain user has logged in.I am using the system.diagnostic.eventlog class but struggling to display user name/ID information of the logged in account. From looking at the security log I can see that event ID 4624 display logon info. Here is my code so far:
Dim eventLogApp As New System.Diagnostics.EventLog("Security")
Dim eventLogEntry As System.Diagnostics.EventLogEntry
Dim eventCntr As Integer = 1
For Each eventLogEntry In eventLogApp.Entries
[code]....
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Aug 26, 2010
I have created a simple framework for a Windows service in VB.NET Express 2008. It enables a timer which then writes to the event log every 6 seconds until the service is stopped. This works fine. I adapted that framework into something further. It is using Windows sockets. Well, I haven't finished that part yet and I just want it to write to the event log successfully but I can't even get it to do that now. I am trying to write an event in the OnStart event. The service is being started successfully, according to the standard event log, but my custom events are not getting there. I don't understand why as I am using the same code for that as I was before.
[Code]....
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Sep 8, 2009
I've created an Event Log Source for my application name during the installation process (the end-users are not local admins) and the app writes any error messages to the Application event log.I now want to retrieve the error from the Application log and display them in a grid in my app.
The issue is that it takes more than 30 seconds to retrieve all of the entries,regardless of any filtering I perform in my WMI query. My query is:
"SELECT * FROM Win32_NTLogEvent Where Logfile = 'Application' And Sourcename = 'myApp' And TimeGenerated > '" + DateTime.Now.AddDays(-14).ToString("yyyyMMdd") + "'"
Initially I only filtered on the SourceName but it took 30+ seconds to retrieve about 100 records from 40,000 in the Application log. I added the TimeGenerated filter thinking it would reduce the query time but it was the same.
I tried using the ReturnImmediately enumerationoption property, which does return quickly, but when iterating through the collection it takes over 30 seconds to display the relevant entries.The benchmark I am working against is the speed at which the Windows Event Viewer opens the Application Log and applies a filter on the SourceName. This takes at most 5 seconds to redisplay the filtered list. However, I note that working on Vista, when I open Event Viewer, UAC prompts for admin elevation whereas my code will be reading from the Application log using standard user rights.
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Nov 19, 2009
I'm working on a program to read event log entries from several remote servers...its basically to automate some daily checks we doMy code works but is very slow as the event logs can have up to 60,000 entries in them.I only need to check the logs from the specified date but when i run this it appears to check from the oldest entry to the newest. does anyone know how to reverse the order it looks in? or to save the index it checked from yesterday to a file and only check newer entries next time it's run (obviously i know how to save a number to a file and read it back.. i just mean in terms of the eventlog API stuff!!!)
Dim elevent As New System.Diagnostics.EventLog("Application", currentserver)
Dim elEventEntry As System.Diagnostics.EventLogEntry
For Each elEventEntry In elevent.Entries
[code].....
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Jun 15, 2011
I am using VB 2008 Express. How can I read from the Windows System event log? I've seen many examples writing to an event log, but none about reading the log.
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Mar 16, 2009
I would like to search event logs on my network for a certain EventID. I havent worked with Event Logs before and was wondering how difficult this task would be.
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Jun 29, 2009
Im using VB2008 and im trying to write a little app to basically poll the local event log for an error from an certain application.I consider myself a noob in vb although i have written a few applications.I dont have any code to show you as i have no idea where to start!! So to sum up what i want my app to do is:
1. poll the local event log
2. if it finds an "error" within that hour from this certain app then email me (i have the email code)
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Jul 26, 2011
I have created a new VB2008 project and I want to display the newest 5 system errors from the eventlogs.So far I have this but all it retrieves at present is every entry where all I need is the latest 5. I wil eventually need to expand this to show EventID etc
Dim objWMI As Object
Dim objItem As Object
[code].....
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Dec 10, 2008
how i can read the audits from security in the event logs in vista.
I just want to get if its successful or unsuccessful and who the user was.
I know the logs are kept here : %SystemRoot%System32WinevtLogsSecurity.evtx
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Nov 2, 2011
I am able to query/read the "Application" event log using System.Management classes in VB.net 2005 (win xp)But I have problem reading the "Message" / "description" of my custom event log.I am getting a System.NullReferenceException{"Object reference not set to an instance of an object."} while reading the "Message" / "Description of the event log while it is reading the others properties.Also when I use System.Diagnostics.EventLog and read all the Events on by one I am able to read the message/description of my custom event log. Why is that the System.Management classes can't read the my custom event log messages while the System.Diagnostics.EventLog classes can read them.The reason I want to use System.Management classes is bcoz I can query my custom event log where as with System.Diagnostics.EventLog classes I have to read the whole event log.
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Mar 29, 2012
I'm trying to follow the technique discribed by jmcilhinney in this HTML [URL]..I have all the drawing code in the .Paint event. Reading the above mentioned thread I would need .Invalidate(all or parts of the picturebox) AND .Update() in order to repaint (all or parts of) my PictureBox, however in my case it works without .Update. Am I doing something wrong?
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Jan 25, 2011
I am able to query/read the event log using VB.NET 2005 (Win XP). But still I have a problem reading the "Message" / "description" of the event log.I am getting a System.NullReferenceException while reading the "Message" / "Description" of the event log.Also when I use System.Diagnostics.EventLog and read all the Event on by one I am able to read the message/description of the event. This is the code:
Public Sub ReadEvent()
Dim iCount As Int16
Dim PastFourHours As Date = Date.Now.AddHours(-4)[code]......
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Jan 12, 2011
I am trying to open for reading a Windows file (used in XP through 7) for reading. However, even though I provide a complete location ("C:Windowssystem32configdefault"), I get a file not found exception.
The file's only unusual attribute is "A" (archive?). My code, shown below, gets the exception at this line, when I try to open it:
logFileStream = New FileStream("C:Windowssystem32configdefault", FileMode.Open,
[code].....
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Sep 10, 2010
I have the code below that reads all the processes running.
Dim procList() As Process = Process.GetProcesses()
For i As Integer = 0 To UBound(procList)
Dim strProcName As String = procList(i).ProcessName
'msgbox(strProcName)
Next
I want to know what company the process belongs to, like the status bar in windows explorer shows the executable info: "Description: Windows Explorer", Company: Microsoft Corporation" and so on. Is it possible?
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Jun 24, 2010
I have the following code to read values in the ABCInstall folder inside SOFTWARE sub key of which is under HKEY_LOCAL_MACHINE.
This works fine in Windows XP but not in Windows 7. make it work in both XP and Windows 7?
Dim Key As RegistryKey = Registry.LocalMachine.OpenSubKey _
("SOFTWARE\ABCInstall", False)
Dim SubKeyNames() As String = Key.GetSubKeyNames()
[Code].....
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Jun 17, 2012
All the code i found for multi-threading is complex and not clear.What i want to do is creating a thread for reading and analyzing a big text file on Form_Load event, so that the form UI building continue without waiting for reading and analyzing the file finish.
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Apr 5, 2012
I created a VB.Net application that will read from excel file and put the data into a table.I used an excel sheet which has 3 columns and 65000 rows.Before starts reading the excel my machine's CPU Usage is around 15%, but during reading the CPU Usage jumps upto 95%.
Private Sub readFromExcel(ByVal fileName As String, ByVal sheetName As String)
Dim connString As String = "data source=XE; user=test; password=test"
Dim con As New OracleConnection(connString)[code].....
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Aug 23, 2011
I'm trying to return a integer / count of the ammount of files in the directory and sub directories in the 'Windows' folder, I need to be able to do this as fast as possible (no lag) and tell when it's done, hope I explained this right.
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Jun 30, 2009
I'm filling 16 pictureboxes in a Windows form with the following code:
Private
ub procHaalFotoOpOdbc(ByVal idnummer As Integer, ByVal vakje As PictureBox)
Dim ImageLength As Long
[code].....
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Jan 18, 2011
What I am trying to do is I have a .dat file that I cannot read but can at the same time. What I mean is I know how to decipher it by hand (alas takes minutes per 6 parts and there are thousands.) I am trying to make an application that can read this and allow me to edit it from my computer. I can open this with a hex program such as hex editor neo. I am currently trying to get it so I can read the file and have it place corresponding parts in to text boxes that I can alter to suit my needs.
I am new to visual basic and know a tiny bit about C++ if you think I would be better off trying in C# I can try that as well I do know some since learning c++. There are 41 parts to each item listed in the file and each one would need to go in its own text box. In hex there are 348 blocks that need to be arranged in corresponding order. Also the beginning of the file has 6 block followed by a code for each item. I need to find a way to put all the correct code in the correct text box and have it make sense.
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Sep 20, 2010
I'm using vs2010 and can't get this to work. The same code has worked in earlier versions. What has changed?
config file:
<appSettings>
<add key="ConnectionString" value="Data Source=MikeLaptop;Initial Catalog=AdventureWorksDW2008R2;Integrated Security=True"/>
</appSettings>
Code:
Dim strProvider As String = ConfigurationManager.AppSettings("ConnectionString")
strProvider is always = nothing
How to do this now?
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Jun 30, 2010
I have the following code, when I comment out the While loop, the service starts without any problems, but when I have that it wouldn't start, how can I go about doing the loop right after the service is started?
Protected Overrides Sub OnStart(ByVal args() As String)
Dim serverSocket As New TcpListener(IPAddress.Any, 8000)
Dim clientSocket As TcpClient
[code]....
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Aug 28, 2009
I'm creating a Windows Console application written in VB.NET and I have a few processes that need to be called only once during the lifetime of the application. If it was an ASP.NET application, I put these in the Appliction_Start method of the Global.asax.vb file. Since there isn't a Global. asax. vb for Console applications, is there an event I could handle that allows me to call my functions before Main is called?
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Feb 11, 2010
I am developing a software and i want to receive windows shuting down event so that i can save the current state of my software on disk.i dont want to make windows service. i want to directly receive the windows shuting down information into my application.
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Jun 20, 2012
I am developing a software and i want to receive windows shuting down event so that i can save the current state of my software on disk.i dont want to make windows service. i want to directly receive the windows shuting down information into my application.
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Aug 27, 2010
I know you can do it with an WMI event or overriding WndProc and looking for the right messages, but i was wondering if there wasn't something hidden in the net framework that makes this task easyer.
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Aug 15, 2011
How to add this functionality a vb.net windows service ? Here is what I've added, but not getting triggered when I tried to log off or lock the pc.
[Code]...
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Apr 10, 2011
i was thinking. is it possible to bring the rows that we click at datagridview and bring it into another form. which mean i click on a data that are on the datagridview, then it will pop up a form, inside the form, there will be have the data we have click on the datagridview, and we can edit and save at that form. Can it be done? if yes, how do i gonna bring it over? i only manage to make a windows pop out only. but cant bring the data over.
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Nov 5, 2011
I want to create a service that sets up a user specific environment. So I would like to know when a user has logged on to the computer.
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Apr 7, 2010
When a user clicks on the little red "x" a.k.a. the form close button on the form command bar, what even is activated besides FormClosed()
I know FormClosing() is called, but I cannot really stop the form from closing after my code is run. I want to be able to show a messagebox that asks if the user wants to exit the form or not. Obviously if they click no, I want the form to stay open, how would I do this?
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