I changed target framework from 3.5 to 4.0, no other changes. A simple ping which worked with 3.5, now with 4.0 the result gives Canceled=True. what may cause this?
Public Sub StartInternetConnectionCheckEvery(ByVal seconds As Integer)
Dim timer As New Timer()
timer.Interval = seconds * 1000
[code].....
i 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
[CODE]...
i have a little problem with the ping in vb. i have a richtextbox and i want to write in a text file the result. I done it, but my txt file loks like this:
[Code]...
I have a gridview with two cells cell(0) is a IP-number and cell(1) is a resultTxt. I have X number of rows. I want a solution that check each row and do a ping to the ip and write result to result. I want to do the ping in a new thread and i want to be able to do more then one at the time. So I want a loop that keeps checking the ones that are not online until they goes online. It's the thread-part I have questions about, looping gridview and doing a ping I can manage, but it I don't do it in a thread the interface freezes.
View 2 RepliesIs there any way I can do this
Dim ipv4Stats As System.Net.NetworkInformation.IPv4InterfaceStatistics
ipv4Stats = System.Net.NetworkInformation.NetworkInterface.GetAllNetworkInterfaces(0).GetIPv4Statistics
TextBox1.Text = ipv4Stats.BytesReceived.ToString / 1048576
TextBox1.Text = FormatNumber(TextBox1.Text, -1)
But for a specific program that is running? Like Iexporer, or Explorer, or whatever, is it posible to monitor the packages being recieved by only one program?
I tried every trick in the book, creating a new object, instantiating it (even tho it says i can't) and just trying to create a reference to use it, and then also trying to call the .Address value inside it while using it like i would use a shared member (without instantiation) and nothing is working, msdn sample/help is useless... i even tried inheriting it and useing it like that, none of them worked, i am sure i am missing something, can anyone give me some code samples? here is the msdn docs on it to to give you an overview.url...although i like vb.net more i can read and coded in both c# and vb.net so either will be fine.url...
View 1 RepliesI must be missing something very obvious...Using Visual Studio 2005 to write a vb app for Windows CE. I'm trying to use the NetworkInformation namespace of System. I can see it in my object browser, but when I try to use it in my form, it doesn't come up in the autocomplete and the compiler complains that "NetworkInformation is not a member of Net".
View 1 RepliesI'm having a bit of an issue killing threads off and resetting my form. After starting the threads, everything runs fine. When I want to cancel the threads, the threads are all killed off "properly" using the Abortable Thread Pool, but how do I know that all the threads are dead? I've tried using both GetAvailableThreads and GetMinThreads compared against the thread count that should be running if they're all killed off, but I can't seem to get it to work. The only time I can get the GetAvailableThreads to return the "correct" number is if I freeze one thread and kill off the rest.
View 7 Repliescurrently, i have this code: My_BgWorkerB is the Name of my BackGround Worker
If My_BgWorkerB.IsBusy Then
If My_BgWorkerB.WorkerSupportsCancellation Then
My_BgWorkerB.CancelAsync()
[code].....
I created a Windows service to upload files from client to a shared folder on a server having a shared permission with everyone has a full control over it using Microsoft BITS service, this service runs with the local system account. The issue is that BITS jobs always get cancelled and I don't know why.I'm using this code
Try
Using BITSManager = New System.Net.BITS.Manager
For Each sItem In arrlDriversFilesUploadList[code]......
when I clicked the send button it would work, but if you tried to hit enter it would just do a postback to the same page. Yesterday I thought I finally got it so it would work on chrome (it has been working just fine on firefox, but breaking on chrome/safari and it is an app for the iphone). But, even though I finally got it so it would change pages, it is now displaying an error. I narrowed down the cause to a postback that is being called right before the postback I want is being sent which is then cancelled. I assume the cancelled postback is blank because the problem I was having was the page would do a blank postback.[code]
View 2 RepliesWhen the user clicks a cell in a new row (the row headed by the *) I am populating a column with an integer that is incremented in the "DefaultValuesNeeded" event. However, when the user clicks off the row (having done nothing to the row), what event gets fired? I need to decrement my counter but can't locate an appropriate place to do it.
View 4 RepliesI am using Excel 2003 (under XP) to print to several printers, with several different kinds and sizes of stock. My workbooks consist of two sheets: "Data" and "Print." "Data" should never be printed. "Print" is laid out with the proper spacing for a particular stock, and should not be sent to the wrong printer.
I want to use a BeforePrint event to check that the active printer is correct and that "Print" is the active sheet. If either of these tests fail, I want to cancel the print event and replace it with a new one.
Here is the problem I am experiencing: Upon opening Excel, all printers function normally. The first time a BeforePrint event is cancelled, Excel gloms onto the active printer and subsequently tries to use its driver for all other printers. In the Print dialog, every printer selected will show the model of the cancelled printer next to "Type" and its location next to "Where," and the Properties button will bring up the preference menu for the cancelled printer. It is still possible to print to the other printers,
but the settings for the cancelled printer will be used, even if they are incompatible. This persists until Excel is closed and reopened.
BeforePrint events that do not cancel do not result in this problem. Events that do nothing BUT cancel, on the other hand, do.
I have a windows application written in VB.Net 2008, framework 3.5. This app is running on 2 remote desktop servers. I have one user who receives error, This operation has been canceled due to restrictions in effect on this computer. when entering in a text box. When he uses the application on Server 1 he does not receive the error. It only happens to this 1 user on one server.
View 10 RepliesI am currently having a headache on how to solve this problem that i am facing. here is the situation: I have a combobox and a list box on the main form. The combobox will get the data from the ms access database. In the database, i have the details of a person's IC, Name and DOB say for eg on one entry I have D215311523C,SHAWN,13/04/1987 So now, my combobox on form load will show the list of dates in the database to allow the user to search base on the date itself by clicking on the selected date. So when the user clicks on the particular date say 13/04/1987, people in the database whose birthday is 13/04/1987 will be shown on the listbox.Meaning to say if i have 3 entries whose dates are the same 13/04/1987, 3 entries will appear. If there is only two entry, then two results will be shown. But now, when i do a single click on the date, one result will be shown. That is correct. But the problem is when i click on the same date again, three of the same results will be shown on the list box. that is it will display : 13/04/1987 13/04/1987 13/04/1987 which is not the case. Then it will show more duplicates of the same results if i click more times on the same date which should not be the case.
Dim n As Integer
Dim numbers() As Integer
Dim StartFrom As Integer
Dim EndAt As Integer
[code].....
I am using a datagrid in my where i am having four columns. In first column the parameter values are entered and in the second column measured value is entered and in third column the nominal value is entered.Inthe fourth column the result is displayed by subtracting the measured value and nominal values. I am doing this calculation in Datagrid cell validated event. What i want is,there will be many rows in the grid,when typing the value in the third column the corresponding result will be displayedin the rowof theresult column,save button will be displayed while the form loads,when the calculate part is completed that is there should not any cell of the resut column empty then i should enable the save butto.
View 2 RepliesI am encountering the following issue So i have a device that sends stuff at the serial port, i then parse it and put it into an array of bytes like that:
Dim HCI_Command_Rcvd_Byte() As Byte All good till here What i wanna do is make an array and put this result every time the serial port gives me a new result, for example:
[Code]...
Basically what i wanna do is let the port parse the messages, fill in the array with the result at an empty spot in this array and then i will have a separate thread that will look in into this array in each non empty space and after it looks into the non empty space it will use or discard the info and also mark this space as empty (after it checked)
I just read about DataSet in VB.NET, it uses disconnected concept. My question is: if my apps has "List All" button that query data from 1 table in the database, and that table has "very very very" many rows, so my DataSet will be filled with those data and eat up memory. Can I limit the data that being put to the DataSet from that query? But I want to be able to retrieve the next data from the same query if the user want to see it?
For example:
I have 1000 rows in my database, and i query all of them. But I just want 200 rows being inserted to my DataSet, but if the user want to see rows number 201 and so on, I want to be able to retrieve the next 200 rows, and so on. So it just like cutting those data into a group of 200 rows. Can I do this with the concept of "disconnected" of the DataSet?
I know that there is usually a DoDragDrop method that starts a drag and drop operation. And that there are events (such as DragEnter, DragOver, DragDrop, DragLeave) that can be handled on the target side.
Are there any events on the source of the dragdrop that will tell me whether the dragdrop operation was completed, or possibly cancelled?
I have set up a method in vb.net and in xcode for encrypting a string using as far as i can tell the same parameters for an AES encryption.I've looked all over the place but cannot find information on whether they use the same encryption algorithm and settings.
this is the vb.net code:
Dim encryptAES As New AesCryptoServiceProvider()
Dim encoding As New UTF8Encoding()
Dim encryptor As ICryptoTransform
encryptAES.Key = encoding.GetBytes("12345678901234567890123456789032")
encryptAES.IV = encoding.GetBytes("1234567890123416")
encryptAES.Mode = CipherMode.CBC
[Code]...
In 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 RepliesI'm currently doing my project to check my server status with ping option. but i got problem to check either the network is plugged or unplugged...I need this checking automaticly using timer...here what i have done....to ping the server is success but when pulgged back the network...error come around..
Private Sub Timer4_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer4.Tick
Timer4.Interval = 30000
If My.Computer.Network.IsAvailable Then
If My.Computer.Network.Ping("www.mine.my", 500) Then
[code].....
what are other ways to do ping in vb.net or c# other than the way found here:
Dim pinger As New System.Net.NetworkInformation.Ping
MessageBox.Show(pinger.Send("192.168.0.119").Status.ToString)
I have this code to ping a list of over 400 switches , the program works fine but for some reason the first time i ping all the switches alot of the attempts time-out(even tho they shouldnt) which makes the program alot slower , if i click ping again less of the attempts time-out(and as a result the program runs faster) and if i click it a third time i usually get a completely accurate result with all the switches pinging back "success" (except for a few which i know for a fact are down anyway) any ideas why this is ?
CODE:
I am trying to create a tool that will test to see if a device is reachable b ICMP and report back with the latency, i.e. send a ping. If possible, I would also like to get the hop count value.[code]I keep getting an error message saying " 'Send' is not a member of 'NetworkTool.Ping' ", but everyone seems to use it. So how do I do get .Send to work?
View 1 RepliesI cannot understand why I get no 'ping' sound when the following messagebox comes up. I'm using VISTA and VB.NET 2008.[code]
View 1 RepliesI 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?
I created an application using the Ping control. So far, when "Button1" is pressed, it performs a ping test to [url]... How do I create it so that it will display a message in RichTextBox1, depending on whether or not it was successful?
View 1 RepliesA little background, the client that I am working with has an enterprise AD that is a mess. They have no containers for servers or any organization what-so-ever. They also shutdown servers and did not remove them properly from AD. So I needed to come up with a program that would find all the windows server, identify them by OS, and then check to see if they would actually respond to a ping. (I am aware that this is not a perfect method if they are refusing ICMP's but its good enough for my purposes). The completion of the program will display all the information and then allow the user to save the excel workbook in a location that they choose.
vb.net
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
[code]......
I am working this little project where i need to ping some servers remotely. there's three of them. I need o ping them and per say while they're being pinged to have a command window open with the pinging process going to keep an eye untill it can ping successfully.And since this is for all three servers how do i create a program where it will have all three servers being pinged? [code]
View 6 Replies
