Ping A Port With Timeout - No App Freeze
May 6, 2011I want to ping a port to see if its online the problem is that if its offline it freezes my app for about 20sec![code]....
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Adding Port To Ping?
Sep 8, 2010I am using VB.net to ping a domain/IP, using the following code;
My.Computer.Network.Ping(Address, 1000)
I now want to add a port to the domain/IP - e.g google.co.uk:21
How would I go about this?
How To Ping Proxies ? Ie In IP:PORT Format
Dec 26, 2010Well I decided to try make a proxy checker, like Charion or Elite proxy checker. These programs accept large lists of proxies in the IP:PORT format, ping them tell you the response time see the screenshot of Elite Proxy Checker, im trying to make a simplified version of this program. [URL]I investigated and made my checker using Ping.SendAsync(ip, timeout, ip) method. It was only afterwards that I discovered that you can only Ping IP's using this method, not the ports as well. Ive spent a few hours trying to find the correct class/methods in order to be able to ping ports, reading different forum posts from experts they say its impossible to ping ports only IPS, can only use sockets to try open a connection with the port.
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Verify The PING Of Each IP Connected In Port
Jan 9, 2009It is possible to verify the PING of each IP connected in port 10009? To list all the IP connected in port 10009 and ping of each IP. Possible?
View 6 RepliesMake Ping System With Port Using Multi-threading?
Nov 12, 2011i trying to make ping system with port using multi-threading.. but seems i got error on label.. i still wonder why suddenly label become a problem..
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Ping Using Vb.error - Ping An Ip Address And Store The Result In An Access Db
Jul 8, 2009i have tried altering some code i have to ping an ip address and store the result in an access db.i had it working when i had the ip hardcoded in as a string but I am now gettin an error.instead of having the ip address hardcoded in to the code i want it to be read in from the access db but im now getting this error:System.nullreferenceExceptionbject reference not set to an instance of an object at...button1.click event args ei have underlined the piece of code i tried to change
Imports System.Data
Public Class Form1
Dim Ping As Net.NetworkInformation.Ping
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Ping Server From Client By Specifying Ip And Port Of Server?
May 28, 2012I have a tcp client and tcp server.How do I ping the server from the client, by specifying the ip and port of the server?
View 1 RepliesError - Timeout Expired - The Timeout Period Elapsed Prior To Completion Of The Operation Or The Server Is Not Responding
May 3, 2011I'm not sure if this is a VB.NET error or SQL Server. But I get the above error with following stack trace:
[SqlException (0x80131904): Timeout
expired. The timeout period elapsed
prior to completion of the operation
or the server is not responding.]
System.Data.SqlClient.SqlConnection.OnError(SqlException
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Make Application Working Better And Never Freeze / Make Application Working With Any Count For Loop Without Freeze
Jan 19, 2012I'm using loop to read data from sql and then make some calculations then save it again to another table but when application loop for 3 or 4 times it's freeze but the job is done but if loop = 10 or more then it is freeze and hangup for long time .i need to learn how to make my application working better and never freeze and make application working with any count for loop without freeze .
View 7 RepliesRead The Data From Barcode Weight Scales By Serial Port And TcpIp Port?
Nov 27, 2010I'm mohammed from Oman ,I'm visual studio.net programmer How I can Read the Data From Barcode Weight scales By Serial port and TcpIp port
View 7 RepliesGet FullName From Available Serial Port (Com Port) From Device Manager In Windows Form With .net?
Jul 25, 2011I have a Windows form.in windows form have a combo box that give me a list of available port serial with it code (Dim ports As String() =SerialPort.GetPortNames())for example( Com1,Com8,Com15,...).but I want to give me fullname of serial port in device manager for example in dvice manager is these (Comunication Port(COM1) - Printer Port(LPT1) And USB Serial Port(COM8)).how to Get it?
View 2 RepliesDetect The Address And Port Number Of The Parallel Port In Computer?
Jun 9, 2010I would like to detect the Address and Port number of the Parallel Port in computer.
View 4 RepliesThe Given Port Name Does Not Start With COM/com Or Does Not Resolve To A Valid Serial Port?
Aug 2, 2011If I uninstall the COM1 and reboot, it works. If I shut down (power off) and restart, I get the message below. If I uninstall then click on Scan for Hardware Changes,The given port name does not start with COM/com or does not resolve to a valid serial port. Parameter name:portName
View 8 RepliesFreeze The First Row?
Mar 27, 2011I have a dgv, I populate it, and I insert a row at the pos 0. And I want to freeze this row even when the user sorts the dgv.
How can I make this? The frozen property alone seems to be not enough.
My GUI Became Freeze
Dec 22, 2008Currently I have to retrieve over 2000 records from DB and bind with combobox. and then follow with another 3 retrieving (less than 20 records)
My problem is when I call this function, my GUI became freeze.
I try to use Application.DoEvents() method but it still didn't work.I read some post and pages, they mention about BackGroundWorker and .Net 2.0. But what i use it MS 2003 with 1.1 so i think i can't access BackGroundWorker.
Freeze Top Row In Excel
Jun 14, 2011I am attempting to freeze the top pane of an excel spreadsheet, which I have opened via my application. The most used method from various internet sources is: [code]
View 2 RepliesOdd Freeze Error
Feb 18, 2010ok i have this code for a banner changer i wrote for an app but i have an issue the code works it gets the banner url from the mysql database useing this code[CODE]......
so im at at loss how do i get it to work so the GUI is still useable while it gets the banner ?
Way To Freeze A Column
Dec 14, 2009Using DataGridView with VB.Net 2008.I would like to freeze the left column so that when/if scrolled this column still remains in place.
View 1 RepliesCommunications :: .net MSComm Port USB 4 Port Relay?
Oct 20, 2011I am trying to get my 4 port USB relay board to work in VB.net using the COM PORT. I found some code from a poster who has the 16 port USB relay version. When trying his code i can only get it to turn on relays 1-3 all at the same time. The product can be found here: USB 4 port relay
"01+//" - Relay 1 is switched ON
"01-//" - Relay 1 is switched OFF
"02+//" - Relay 2 is switched ON
"02-//" - Relay 2 is switched OFF
[code].....
So i am confused as to how to separate each relay out with that code above and just be able to turn on any number 1-4 relay on or off independently from each other!
Application Freeze During Download?
Oct 15, 2011I use these codes to download/upload to my FTP host , they work perfectly but since i have to handles few download/upload , sometimes the application freeze during download
'Upload :
Try
' set up request...
Dim clsRequest As System.Net.FtpWebRequest = _
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Freeze A Remote Computer?
Jan 14, 2010Is it possible to freeze a remote computer? thru the ip address.
freeze computer meaning temporarily disable the mouse and keyboard of that remote computer
IDE :: Loop Causes Program To Freeze?
Feb 14, 2009My following code hangs my VB IDE. What could be the reason. I am of the opinion that by 'sleep' I am avoiding a tight loop and so the program should not freeze. What should I do?
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Multi-thread UI Freeze?
Oct 19, 2010I'm experiencing an error which complexity and way to approach I can't quite understand.. It looks like two threads not able to work simultaneously.The first thread is the normal program thread, and the problem occurs when the user clicks a button. This sends some messages through a method (PlaceOrder) of an API library object. This method is called 2-3 times in a loop. Handlers have also been added (on program startup) to receive callbacks on events raised by that object, and this is the 2nd thread that contributes to the error.
The error seems to occur when the PlaceOrder method is called while receiving an event from this same object.The result is that the UI freezes. I can trace the error in two places. If I trace the first thread (which is the initial program thread); the freeze occurs when reaching the lock(this) line, in the API-object class. If I trace the callback event, the handlers of this event try to invoke a RichTextBox on the form, and the freeze occurs on the line <RichTextBox>.Invoke(....), as indicated below.
The thing is that when pushing the button, there is a loop which calls the method of the API-object 2-3 times. And the first time succeeds, but the 2nd time it seems to crash in some way with the callback. It would be nice if I had made some silly mistake with the invoke code, but I don't think I have, as it updates fine prior to the error.. I'm not sure, but it may be relevant that it's in fact the same object, so early in my program I add this event listener (which is the one that updates the RichTextBox):
AddHandler ibclient.Error, New EventHandler(Of ErrorEventArgs)(AddressOf client_Error)
..while later, related to the freeze, I have:
ibClient.PlaceOrder(....)
But I'm handling a lot of calls forth and back other than these, and haven't experienced any problem before.it doesn't give any exception or error message, it just freezes.The invoke stuff in the form code, which should be as per trusted examples: (Freeze occurs at blue highlight)
Private Delegate Sub SetRichTextBoxInvoker(ByVal message As String)
Private Sub OnLogUpdate(ByVal message As String)
If Me.rtbTwsMessages.InvokeRequired Then[code]........
My FileUpload Control Freeze
May 22, 2012First off I'm using aspx pages with Visual Basic .net 2008 for the code behind.
I'm using a FileUpload control on an aspx web page to upload files to the server.
When I click on the Browse button I get a dialog box to select the file. I select the file and click the Open button and the entire file path populates the textbox portion of the control, just as it should.
However, when I use the same process to select a second file, after clicking the Open button it takes over 2 minutes for it to populate the textbox portion.
VS 2008 Freeze On Invoking RTB?
Oct 17, 2011I have a RichTextBox (txtCustomDict) ... and i am invoking it like so from another thread:
[Code]...
EDIT: Just checked and it does the same thing if i split it into 2 differently named subs then invoke the other sub
VS 2008 GUI Freeze With DataGridView
Jun 2, 2009I have an app with which I populate a DataGridView named data. I have implemented threading in this app. Now both in debug mode (run through VS 2008 Express Edition), and without threading implemented the app works smoothly as it should. With threading and as a standalone .exe however, it freezes up. Not just anywhere, but as soon as 6 items are filled in the DataGridView (the top of the last one is only slightly visible). I have synclocked everything relating to the DGV, and am completely stumped.
View 7 RepliesVS 2010 Another Multithreading - Seems To Still Freeze A Bit
Feb 9, 2011I just put a button and a textbox on a form to try and learn to multi thread, i think i've done it correctly. but it still appears to freeze for a little bit just before it attempts to display the data. i think it's the invoking. Is it normal / have a done something wrong?
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Windows Form Freeze?
Dec 8, 2008I am new to LINQ to SQL and I try to Edit and Add a New item on a Windows Form in VB.Net, the form freezes? By example, when I try to select a value from a combobox the prompt get stuck (it enters in Enter event) and it cannot exit, then the form froze.
View 3 RepliesWhat Should Use Instead Of Ping
Oct 15, 2009In my Windows Forms application (on startup) I use the ping command to check if both the Internet connection and my SQL Server are alive.Is there any "better" way-command I should use for accomplishing the above task in the .NET framework 2.0?
View 6 Replies.net - Multiple Webbrowser Navigation Freeze?
Oct 24, 2010I have problem with multiple webbrowsers on form so i created simple form with 10 browsers in it and 1 button: Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
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When I click button and try to drag form1 everything is none or slow responding.I see web site loading in browsers but nothing is responding on screen until loading of pages is finished. In the meantime my processor it goes to 90-100%I tested exe on my laptop and is working same.