Loop, Timer - Code That Checks That The Network Is Connected But Need It To Keep Checking And Updating
Feb 4, 2010
I am a new member that has just start coding. Im currently working on a small application for a desktop that will give me information from my system. I have code that works but might not be great. I have code that checks that the network is connected but need it to keep checking and updating. I Have tryed loops, goto and timers but not having any luck. Can anyone help point me in right direction. Here is my code so far.
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Label1.Text = TimeOfDay
Label8.Text = "Time :"
I have 2 clients connected via a server program.When 1 client hits an arrow key, a picturebox moves on client1 and on client2.Before adding this network functionality, the picturebox on client1 moved fast with each click.Now, there is a delay of like 2-3 seconds.I know the code isn't optimal, but i'm not a networking wizard.What i'm doing is when pressing a key on client 1, it passes a text to a textbox in client 2 which then has the picturebox move in client 2 depending on the text.The slowdown occurs on client 1, which is odd because the picturebox isn't directly connected to the network code.[code]
On my program I am trying to make a ToolStripStatusLabel's text change to "connected" if connected to a network and if not connected to a network change the text to " Not Connected" then I don't know how to display a image if connected to a network or not connected. So if the computer is connected to a network I have a image that I would like to be displayed next to the ToolStripStatusLabel. And if not connected to a network, can the program display a different image? I tried this:
how can i detect in VB.Net 2010 that which network card I'm currently using for internet? Like Local Area network, Wireless Network Connection, Cellular Modem or Bluetooth Modem?
Is there any easy way to find out , which network am I connected to via programmatically. I mean we can check the Network is available through "My.Computer.Network.IsAvailable", same way can i find the name the network (Either Direct or via VPN).
I have to do something if my network is connected to a particular network.
I want to be able to change my network on the press of a button to another favorite network followed by the launch of a LAN based game and closing a set of pre-defined internet applications that will interrupt gameplay with "Lost connection" popups Basically I have two networks, on Internet, one only LAN (Both Wireless)I want to be able to switch networks and launch my game. I know the code for launching my game, but my question is....How do I switch network connections using my program?
I have written a code for sending emails using my vb.net application,ok.Now i want to inform my client if and only if he is not connected to the internet before the sending emails.so it means the purpose of my code will be to check if he is online or nt and if not then inform him to get online and then try sending the email.How to do this?
Im currently making a tower defense game and im on my last bug for the game and i cannot get it solved. For some reason my For Loop to check if a shot hits a person is not working properly. Ill set it to "For Me.x = 1 To NumOfFaces 'Const for 5' and itll only check the first enemy and last enemy. Here is the code to check for if a shot hits an enemy, this runs on a timer through out the game.
Private Sub HitFace() For Me.x = 1 To NumOfFaces If Shot1Firing = True Or Shot2Firing = True Or Shot3Firing = True Or Shot4Firing = True Or Shot5Firing = True Or Shot6Firing = True Then[code].....
Here is my Prob- we have a main router from which we use a distributor or hub for internet connection distribution, ever computer connected automatically obtains IP address of format say - 180.50.50.xxx to access net connection.if any connected computer has different IP format than the given one, it cannot access internet.
Using the code below i will get all network interfaces wich are enabled and functional on the machine.
Private netIntrfc As NetworkInterface() = NetworkInterface.GetAllNetworkInterfaces() For i As Integer = 0 To netIntrfc.Length - 1 If netIntrfc(i).OperationalStatus = OperationalStatus.Up Then
[code]....
But my problem is how to get the default one, the one(ethernet adapter) through wich user is connected to internet?I need to change some settings of default(through wich user is connected to internet) adapter. settings i change through registry so i could sample add same settings for each network interface but that could cause problems and makes no point then?
EDITED:for now i have done like code below, so if this can help someone other...
Dim u As UdpClient = New UdpClient(System.Net.Dns.GetHostName, 1) Dim localAddr As IPAddress = CType(u.Client.LocalEndPoint, IPEndPoint).Address Private netIntrfc As NetworkInterface() = NetworkInterface.GetAllNetworkInterfaces()
i m new in .net programming i am wanting to develop a network application by which i can watch the screens of other computers connected in LAN,i can give permissions/privilages to other users.
I have a class that needs to check for errors in the data contained in a object.The routines that will check for errors could be implemented in concrete interfaces of supertype IErrorCheck. That way error checks can be discrete and added or removed from the class that requests the error checks.Each IErrorCheck implementation would be programmed against the supertype IErrorCheck (Strategy).But it would be nice not to recompile when checks are added or removed.Is there an accepted procedure for abstracting the error checks all the way out of the program, such as to read the checks from a file?
I am using sockets to send message between computers. I send the messages alright. What I want is when the message "x0x" comes, the client must be closed within 5 minutes. Teh admin can cancel the request by sending message "-xx" as well. The routine that checks for incoming connections and accepts messages uses WHILE TRUE...END WHILE since it must always listen. Once I get a message, I need to fire a timer control or other that fires within 5 minutes. But the program cant leave the WHILE TRUE at all. If i exit it early, the timer fires and the program does get exit. How do I fire the timer or other routine while still the WHILE TRUE routine checks for incomin connections and messages?
I'm writing a console app to take care of our automated user creation process which was previously done by a batch file. I need to check if a users network share exist on any of 38 servers but seem to be having trouble finding info on how to do it. From what i can tell i need to use the netapi32.dll and the NetShareCheck function, but i'm not sure how to do it.
this is what i have so far, but it isn't working as it should. it seems to be returning 2311 in almost all cases exept if i use uppercase on the server and device and the device starts with C.
Imports System.Runtime.InteropServices Public Class NetApiWin32 Declare Unicode Function NetShareCheck Lib "netapi32.dll"
I just want to add a DSN if it does not already exist. I am looking at the registry and I know the DSN exists but this code returns False consistently.If(not isnothing(My.Computer.Registry.CurrentUser.OpenSubKey("SOFTWAREODBCODBC.INISQL_Finance", True)),True, False) Once I get past this the next step is to add the DSN if needed.
I'm a little confused about checking values in a database. What I want to do is see if a tuple such as the following exists:
[Code]...
The invoice_num is not null, it's blank: " ". What I want is to find if such an entry exists, where the invoice_num is " " and update it with a number entered into a textbox. I'm a little confused about if statements and cases in SQL, so if someone could point me in the right direction, that would be great!
I have application that use MSSQL database. Application have module that is using for sending messages between application users. When one user send message to another I insert message in database, and set message status to 1( after user read message database I update and set message status to 0). Now, I am using system.timers.timer for checking message status, and if message status 1 user get alert that he has one message inbox. The problem is that this application can be used by many users, and if timer run ever 5 minutes this gone slow application and database.
I am using the code below to test whether the user is connected using either a wireless or LAN connection. i.e. that the cable is plugged in, or the wireless is switch off. The code works fine for this. However, if you can spot any potential problems with this or you know of a better way I would be interested to learn more.
I've almost completed my first VB.Net app which is a rewrite of an old vba app I wrote.The last part that I need to write is the timed events part. What I have in VBA is quite straightforward.Every 500ms the Timer event runs through, it checks if certain variables have been flagged and if so runs the relevent code? Code is nothing major, just updates a networked device.I've looked into timers in .net but it seems like there are various routes that I can go down.
In our project, we have 2 client PCs having their own local databases and 1 server PC who also have its own local database(.mdf). These three are connected through a local area network so I would like to perform updates to the client PC database from the server PC. There should be two types of update, one is that the server will send its entire database to the clients and overwrite the client's databases and the other is to append the changes made in the server database to the client database. I only want to use vb 2010 so I used the SQL connection class.
