Detecting Network Synchronisation Status?
May 28, 2009
I have designed a website using ASP (Visual Basic) which our staff use both interally and externally (i.e. on and off our network). Browsing network folders is available to the user when using the site on the network. However, if the user has a laptop which has not synchronised with the server, network folders set for synchronisation appear empty when they are not.
I understand the reasons for this, however I would like to be able to present the users with a friendly warning if they have not synchronised their laptop. Is there some sort of system flag I can access which will tell me whether a given laptop client has synchronised with the network or not (the same trigger which makes the Synchronisation Manager icon appear on the task bar)?
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Apr 26, 2011
Title says it all "Detecting internet Inactivity in VB.NET"
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Jul 26, 2010
A new client has recently asked me to develop a Windows service that will monitor whether or not his server has internet connectivity. The service should log when the connection goes down to Local Only and back up to Internet Access as shown in Network and Sharing Center.
My original idea was to have the service ping a website like google every 5 minutes or so, but I don't know how to retrieve the results of the ping, so I then thought I could code a WebBrowser control into it and write the log entries based on the results of connection attempts from that.
This also seems like a rather impractical idea though, so can anyone suggest the best way to go about this?
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Jun 8, 2011
I have a problem when trying to detect the computers network connection status.
Here is the code I have used:
Dim IsAvalible As String = My.Computer.Network.IsAvailable
If IsAvalible = True Then Label1.Text = "Connected" Else <code>
<code>If IsAvalible = False Then</code> I <code>
Label1.Text = "Disconnected"</code></code>
End If [/ICODE] End If[/ICODE]
But for some even when the network is disconnected or the computers wifi is turned on I still get the result of "Connected". I think there something wrong with the code.
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Jan 3, 2010
I work as an IT Administrator and manage a few Servers, Routers, VPN Connections over a number if locations. What I am wanting to do is create a vb.net app that will go out and ping say every 2-5mins each of the servers, routers, that are listed and then shows beside the Hostname a Green Circle which means online and if its a Red Circle its offline, and the screen refreshes if their is a problem or a device / service comes back online.
Then if its offline email a particular email address showing the hostname of either the server or router and which location saying its offline. If possible to make it easier to change the devices to show possible have a txt file or something like that with the Hostname, IP Address, Location.
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Jul 25, 2011
I have a oracle database. I use the OracleDataAdapter(Oracle.DataAccess.dll) for select, update, insert, delete operations. I don't set any (table) locks on my own(I only start a transaction). I have a oracle table named "test" with the entry "test1".
Now my question: Can Person A read the entry "test1" while Person B is updating/deleting the entry at the exact same time? What happens in the worst case? An old match/empty match or can it cause any kind of exception/error(e.g. "TableLocked-Exception")?
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Sep 1, 2009
Here is my insert statement:
[Code]...
Now for a succesful insertion i want to notify the user about a successful save operation.....i.e,i want to display a message "Successful Save Operation"to the user. How to do this using the Status Strip?
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Aug 18, 2009
Here is my idea so far: I have a bunch of computers connected in a local network. One of them is a MySQL server, one will have a vb.NET program wich will act as a "second server" and the rest will be different clients. What I want to do is that the "second server" will send out some kind of message or network package to some of the clients in the network, and they will execute a code based on what message it is, or what kind of package it is. I'll give you a simple example:
[Code]...
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Mar 20, 2009
I've got the code to display the current browser status text in the status bar but i want it to display the name of my web browser aswell. Example: Dreamincode.net - (Name of Webbrowser)
He is my code for the displaying staus text.
Private Sub webBrowser1_StatusTextChanged( _
ByVal sender As Object, ByVal e As EventArgs) _
Handles webBrowser1.StatusTextChanged
[Code]...
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Jul 3, 2009
I have a gridview in which when I click edit, update, and cancel button comes. I have a variable named status. If status=false then update should change to insert and if status=true then update should be update itself.
<asp:TemplateField >
<ItemTemplate>
<asp:LinkButton ID="lnkEdit" runat="server" CommandName="Edit" Text="Edit">
</asp:LinkButton>
[code].....
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Nov 18, 2011
I have a .NET 2.0 *.dll that calls My.Computer.Network.Ping(). The *.dll is then run out of an *.exe via AppDomain.CreateDomain() and Invoke(). The problem is that this works just fine under Windows XP but under Windows 7, I get an exception saying that no network connection is available. I tried the Ping() call out of a small console application under Windows 7 and it works just fine.
[Code]....
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Mar 26, 2012
I am writing some code as part of a framework for opening a file.The file is of custom type and should not be opened by more than one instance of my application. To stop multiple file opening I use a filestream to create a lock file and then keep said filestream open. This seems to work in preventing another instance of my application from opening the file ( as it will fail in recreating the lock stream in the files open code ) but if the file is on a network share and the network drops then the original application also can not access the file any more.The code to get the lock stream is as follows:
Try
' We need to keep this stream alive to prevent other applications gaining access to the lock
mLockStream = New FileStream(mLockPath, FileMode.CreateNew, FileAccess.Write, FileShare.None)[code]....
In this I create the lock stream the first time round and then if another application tries to create it, it throws an exception and stops them from getting any further. This is kind of how it needs to work, unfortunately as I said, if this is done across a network and then the network connection is dropped for some reason then I can not delete the lock stream as I get an IOException telling me a process cannot access the file as it is open in another process ( which shouldn't be happening I don't think).
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Jun 22, 2011
I have a problem I want to make a server and client where the server is password protected and will make the client display files/folders in a designated folder which will be in the server's current directory and the client will ask what IP and password to connect to and if the password is correct is allows the client to access the files/folders in that folder in C.D. of the server and the client can download any file within the folder by clicking a button, yet don't even know where to start.
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Sep 15, 2009
I am writing a program that expands the usage of the clipboard, but I need to tell when the user has either cut, copied, or pasted something so I can write code accordingly to that. I need to know how I can check to see when the user has entered a command like this.
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Aug 1, 2011
I do not understand why this is not being detected.when I do a test in the immed it comes back true for a match, but the code never run's.[code]
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Jan 26, 2012
I have a query I am creating a Window App in vb.net (4.0) in which I have to use multiple databases although all databases are same with same db structure & stored procedures,just names are different. In the very starting of application, I need to give a option to the user that these are available db & user will select which one to connect & use.
So is it possible to detect how many db are available in the SQL Server through vb.net & how can achieve this (to provide options to the user) What would be the best approach?
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May 4, 2010
I have worked with PHP and other programming languages but I am new to VB. I want to write an application that is run manually every day, and each time it is run it checks for modified and newly created files in a particular folder
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Jun 6, 2011
i want to detect if listview has been updated
eg: there are listview1,listview2 and a button1 .u can send items to listview2 from listview1 .if the listview2 has an item button1 will enable if the listview2 is empty button1 will disable
what is the suitable event for this?? (there is an event called BindingContextChanged is it the suitable event?if so how to use it??)
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May 7, 2009
In the app we use a third party dll for looking up names and addresses.This resides in the system32 directory.Before I try and access this dll I need to be able to find out if it has been registered on the PC.So in short does anyone know the code to be able to check if a dll has been registered in the registry?
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Aug 16, 2011
I am facing problem while in detecting the multiple key combinations ..here is my cod
Private Function keyboardCallBack(ByVal nCode As Integer, ByVal wParam As Integer, ByVal lParam As IntPtr) As IntPtr
[code].....
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Apr 26, 2009
I have a camera with a LiveView function (images aren�t snapped, but they are directly sent to my computer), which I managed to connect with VB.net, so I have got the image in a picture box on my form.The next thing I want to do, is to gather 3 spots from the image... The spots are all red, something very similar to #FF0000 (it is a camera + lights, etc... some tolerance needed). So, can anyone help me here?
I think the working "check list" could be something like this:
- Get red, green and blue channels separated
- Change green and blue into gray scale (100% blue / green = black, 0% b / g = transparent)
- Put these b / g both into 50% alpha and put them over the red (which means where is both green and blue = black, only one of them = 50% alpha black, none = transparent)
- Somehow select the areas with most red
- Get center of these areas - my points
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Sep 13, 2009
I was just wondering if it was possible to make vb 2008 detect if there is or is not sound.As in my project i want vb to detect when a video has stopped playing and then do something else. So i waqs thinking maybe i could detect when sound has stopped and then perform my other actions..
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Dec 9, 2010
How do I detect a ctrl+tab keypress?
Reason for asking: I want to stop a user from changing tabs in a tab control.
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Mar 7, 2011
I want to be able to detect when the user presses F10 or Ctrl+F10 outside of my program, and upon receiving the key press, it will send text to whatever they currently have selected (e.g. a text box). How can this be accomplished in the simplest way?
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Jul 22, 2010
How do i detect ( ' and " or better still any char which sql cannot read)in textbox. this is my NOT working code there are codes before else if and after else so ya ...
[Code]....
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Jun 6, 2011
I'm trying to set up a timer that counts up to ten and starts/resets when the left mouse button is clicked (anywhere on the screen even when the application is in the background). I'm struggling to find a code that suggests it is possible and now I am starting to wonder even if it is possible in VB?
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Feb 2, 2012
I need to know the status of the mouse whether it is moving or being idle. How can I do that?
I have tried with form's mouse move event but, it doesn't work if the mouse is on any control.
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Feb 24, 2010
I have an Access 2007 database that runs constantly, the form on the database basically runs a timer every 10 seconds and runs a Macro. The problem I have is that when the backups run at night the network connection the database is on disconnects for the backup, so the database crashes with the error.
"Your Network Access was interrupted. To continue, close this database, and then open it again."
What I would like to do is create a small VB Application that runs on the machine that the database runs on, detects when the database has a problem, closes down the database process then restarts the database.
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Nov 9, 2009
I am developing a UI for an embedded device that I have designed and built. The device uses an FT232 chip which, when connected via USB is automatically assigned one of the COM ports. I was wondering if there is a way to set up a loop which would automatically detect which COM port the device has been assigned. I could then add some handshaking to verify that the port is correct.
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Jan 31, 2012
I want to create program that Detecting Argument of Program, For example:There are 2 Program, just call them a.exe and b.exe, If a.exe is open, the a.exe will execute b.exe with some argument, for example, argument is "arg", and I want my program to Detect the Launch Argument of b.exe ("arg").
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