How To Check Internet Connectivity
Jul 18, 2009
ade an application and it uses internet to connect to my private server database and send email sometimes.. and its working great until now that I noticed e bug in it When im not connected in internet and working with my application and then my application tries to send email or connect to my server database I got my application crashed so what I want to do is to make my application first detect if it has internet connectivity and then to connect to my server or send any mai
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Aug 6, 2009
How can I check for internet connectivity? I can't use the My.Computer.Network.IsAvailable, because that one returns true also when you only have a local network connection and no internet connection.
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Jan 10, 2012
I need my application to check for internet connectivity on my user's computer. If there is, an image is displayed and if there isn't, a different image is displayed. Here's the code I used to get this to work:
Private Sub Window_Loaded(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) Handles MyBase.Loaded
If NetworkInformation.NetworkInterface.GetIsNetworkAvailable Then
Dim bi1 As New BitmapImage
[code]....
I decided to test this on my own computer by changing my default gateway (thereby making it seem as if I lost connection). But I realized that the code still showed that I was connected. So I'm thinking that it's only checking for connectivity of the interface - which in this case, is my connection to the router (which is true, I was connected to the router).How do I check that the user's PC is actually connected to the internet? I read the article Check for Internet connectivity but it's in C# and I don't understand that.
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Oct 25, 2009
i made an application and it uses internet to connect to my private server database and send email sometimes.. and its working great until now that I noticed e bug in it When im not connected in internet and working with my application and then my application tries to send email or connect to my server database I got my application crashed so what I want to do is to make my application first detect if it has internet connectivity and then to connect to my server or send any mail to be more specific i want to make a loop to check for internet connectivity all the time and in that moment that im not connected to internet to stop trying to connect to my server...
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Mar 27, 2010
Checking the Internet Connectivity?[URL]
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Feb 1, 2009
"Hey ProgrammingKing, How do I add a feature to my program that shows my Internet Connectivity Status that changes when the Status changes?"
Well, It's really simple, All you do is add 1 timer and 1 label.
Heres the code :
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
If My.Computer.Network.IsAvailable Then
[Code].....
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Oct 28, 2009
I saw another forum which discussed how to detect whether a LAN was connected, but I need to know whether my Internet connection from my ISP is up or not (I'm writing a program for day trading, so knowing if my internet connection is down is critical). I know I can simply open a browser in VB and browse to a site and see if it doesn't come back "page not found", but that involves a fair amount of overhead, and if the internet is down, it often takes many seconds to a minute to come back with "page not found". Is there some simple command that will quickly tell me that my internet connection is working? I'm using VB in VS 2008, and currently using XP although I plan to convert to Windows 7 in the next couple months.
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Jan 3, 2012
I need to verify that my app can connect to the default C$ share on a remote server on the network. [code]...
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Apr 2, 2011
How do I check the connectivity to Remote Desktop through Visual Basic (if possible). I would like to run a program checking if servers is up running normally. In some cases servers will respond to ping, without being able to connect to RDP. It would be great to a program being able to detect loss of RDP-connectivity almost as soon as any problems appear.
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Feb 28, 2009
I am trying to verify connectivity from my application to various servers - For now I am only concerned with mail servers... (later SQL etc)Before anyone gets all upset and thinking this is for SPAM - wrong - these are to confirm connectivity from the application for sending logs OR to ensure the SQL conneciton is working appropriately - Those that want to SPAM can do this simply by getting LINUX and doing it for free with ANY mail client (I add this ONLY because MOST SMTP threads go unanswered... which is silly... there are MANY good reasons to work with mail within an application.....)So what I have tried is opening a telnet session, grabbing the output, and going from there...But it is not working.... the output contains nothing specific to the telnet session I initiate - and.... of course from the command prompt manually i DO get the proper responses
[code]...
I get the command prompt header, I see the commands... I see the prompts... but after the telnet command there is nothing I am assuming there is an issue redirecting telnet info and the telnet session terminates the second I try to read the data
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Sep 22, 2010
I have no idea at all of how to get a simple True/False function to tell me if the user has any sort of internet connection
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Mar 30, 2012
I need to check whether If the Internet Connection Is available or not
If My.Computer.Network.IsAvailable = True Then
Return My.Computer.Network.Ping("8.8.8.8")
Else
Return False
End If
Above code returns Whether the PC connected to the internet, But I can't Check It through out the Software, I am only Having Single Form.
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Dec 27, 2009
Im trying to check my internet connection using just a button how do i do that?
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Jul 1, 2010
I'm writing a Silverlight 4 application and would like to check when opening the installed out of browser application, whether there is a valid internet connection (to then download some data from my website). I realise that I could put a try catch around a WebRequest but that seems a bit hacky to me.
EDIT: What I meant by valid internet connection is just connected to the internet
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Oct 18, 2010
Basically I want to have a picturebox which shows an embedded resource if not connected to the internet, and an online image if connected to the internet.I assume this can be done on the form load event, I just don't know the code for it. Basically this is the logic though:
-If 'http:/[url].... is available (therefore connected to internet)
-Picturebox1.Image = http:[url].....
-Else[code].....
How can I code that properly? Would putting it in the form load event work?
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Mar 4, 2011
How I can check if the internet connection is working or not? i have to check every few seconds without getting stuck.
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Nov 19, 2011
This is the work of one responder for the most part, and is not indicative of the quality of most of the posts.But you can judge that for yourself.
If you are writing a program that is used to monitor the status of your network, then this thread may not be of interest.
If you are an application programmer that uses network resources to accomplish your goal, i.e. you are using SMTP, FTP, HTTP, NNTP, NTP etc., and you think that you need to check for a connection first, then read on.Follow up to this.Before getting all geeky let's take a little detour...
Five days a week I get up, eat breakfast, check my email, forums, etc., take a shower, get dressed, and then drive to school.Many of you probably have a similar routine.What is interesting about that is not what we do, but what we dont do,because of our expectations and experience.Here is what I dont do.
I dont stick my finger in the electrical socket to see if there is electricity for the coffee maker and toaster.I dont fire up the command prompt and ping some host on the internet to see if I have connectivity.I dont check the battery, tires, water level, clutch fluid level, washer fluid level, etc.,before I drive off.
All of that is based on expectation and experience.So why would you write an application that pings the internet before it did something (SMTP, FTP, HTTP, NNTP, NTP etc)???? Is your experience or expectation that the network will be down?To illustrate and hopefully convince you that, like Oblio, it is pointless, create a new form with three buttons. In the following examples I use a WebRequest / WebResponse as my 'Something'.Here is what some think is a good approach, the classic ping-then-do, what I think you shouldn't do.[code]....What is wrong with this code is that all of the network IO is being done without a Try / Catch block.
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Aug 23, 2011
How to check if connected to the internet instantly?
It must support proxi and windows xp,too.
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Nov 10, 2011
We want to developed services to sending fax which should check internet connection after every 10 sec and should be work on all windows operating system.
I cannot use any host like[URL]..to check internet connection because it increase network traffic.
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Oct 7, 2009
Is there a way in Win App to do a check whether internet is available before connecting to Webservices?
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Sep 1, 2010
How to check if a computer has access to the internet?
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May 9, 2012
I have a chunk of code that downloads a file using DownloadFileAsync. If I disconnect the internet the button clicks and nothing happens. I want to throw an exception if the internet is down and also if the download fails. [code]
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Feb 21, 2012
How do i exactly check internet connection speed.I have searched around google and found out a method w/c will Download a file like 1mb size, then it will calculate the speed.
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Jan 31, 2011
I've been looking for a way to do this for like two days now, and no luck.
What I want to do is get into the temporary internet files, find a certain file....
(^^^ I can do that just fine (using specialfolders, etc) ^^^)
and get the internet address associated with it.
See the attachment if you don't get my meaning.
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Oct 15, 2011
we have our system running but our system needs to be modified because we did something wrong...we are doing an "Internet monitoring System" in our school library where the user can only access the internet 1hr a day, and he/she cannot use the internet within that day if he couldn't buy a time on a serve...every students should only have 20hrs time usage per semester...our problem is every day their 20hrs is being reduced in 1hr.. the rule is the time per semester which is 20hrs that is given to the students was reduced 1hr only if he uses the internet..but our system is reducing their 1hr every day.
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Nov 6, 2009
Dim con As New OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=F:\dotnet\lstbox1\db1.mdb;Jet OLEDB:Database Password=")
if i connect without setting database password then it connects easily. if i set password then it says file cannot connect.Is there any other method for entering password without writing password into the connection string?
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Jul 4, 2011
connectivity between VB.Net 2005 and MS-access 2007 ?
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Jun 6, 2009
Make Custom Msgbox Button In the Visual Basic 6.0. I dont know how to create user defined butten "Custom Button For Msgbox.
[Code]..
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Oct 1, 2009
Code for database connectivity using vb.net
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Mar 2, 2009
i want to learn connectivity of vb.net 2005 and sql server 2005
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