I want a start IP and end IP and it to ping all the IPs between and including those IPs. I've seen examples of when it gets the subnet and then iterates through from 0 to 255 but I'm struggling with this. Is there a way to make an IP address object (is this the right word?) that iterates the same way as an IP would e.g.goes from 192.168.1.255 then would go to 192.168.2.0.
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I got help with pinging a range of IPs earlier and was given this code. I was then trying to change it slightly so I could scan more than my network between any given range e.g. 125.1.1.1 to 126.12.25.66.[code]
View 3 RepliesAre there any IP Address filters or masks available in Windows Forms as per following screenshot? A backslash shouldn't be allowed or it should be filtered somehow.
View 1 RepliesHere 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:
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I have a list of machines, 1 per line in a file called devices.txt.
What I need to be able to do is to ping each of these machines, and then output each machine that is online to another text file called machines.txt
The files need to just be the machine name and have 1 machine per line.
recently ive been making a app for minecraft and im trying to add a new feature what i want it to do is ping the server and then tell me if its on or off any server using a redirector like dyndns or no-ip will ping back as online even if they are offline because the redirector isn't down or.[code]
View 6 RepliesI've run into a bit of a problem using Async ping. Basically, I want to ping computers in the list before I run the next bit of my program. The computers who I can ping are added to a list and that is used in a background worker. Trouble is can't seem to work out how to wait until after pinging ALL computers in the list, either successful or timed-out. Is there something a long the lines of 'If Async Ping is running'?
Private Sub pingCompleted(ByVal sender As Object, ByVal e As System.Net.NetworkInformation.PingCompletedEventArgs)
If e.Reply.Status = Net.NetworkInformation.IPStatus.Success Then
complist.Add(e.UserState)
Else
'do nothing
End If
End Sub
I need the next bit to wait because if 'complist' is changed while it's being used I get collection errors.
Ping Email Address to see if it exists.
I would like to ping an email to see if it exists. Does anyone know how I can accomplish this?
I have a class that uses My.Computer.Network.Ping to get a boolean value on whether a IP address or hostname is reachable.However, when I'm testing that class, I want to disable pinging so that during the test whenever I run the My.Computer.Network.Ping it will always return false or throw some kind of exception.
I have tried the following, but I still get a true returned (meaning, the attempts to disable ping didn't work)
Dim restricited As New System.Net.NetworkInformation.NetworkInformationPermission(System.Security.Permissions.PermissionState.None)
Dim mySocketPermission1 As New SocketPermission(PermissionState.None)
Dim myWebPermission As New WebPermission(PermissionState.None)
myWebPermission.Demand()'
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I am using the following code in the Load method of a VB form to generate random numbers in the range 1 to 8. Without fail after enough loops the range is exceeded and 9 is the random number returned every time. The line using the Rnd function is from: Rnd Function (Visual Basic)
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Ive got an app that holds a list of site we have, At each site there are a few devices. The idea is when they click on a site all the details for the site are loaded and then a second thread sits and pings each device to see if its live. Im trying to do this in a seperate thread so if they click another site while its still pinging them it doesn't wait before it switches site. This all seems to be workling fine except if you click through the sites quickly, when you do that it will eventually come up with
Quote:
{"Collection was modified; enumeration operation might not execute."}
The error flags up on the "Next" line in "ThreadedPing"
Thread stuff
Public Sub ThreadedPing(ByVal dt As DataTable)
Try
Dim dr As DataRow
[CODE]...
I am getting the error:"Range variable 'sender' hides a variable in an enclosing block or a range variable previously defined in the query expression."for this
Imports System.Data.SqlClient
Imports System.Linq
Public Class Form1
[code]....
I can select any other item from the table without the error. "sender" has the same properties as "receiver" in the SQL table.
Is there a way in VB.Net to "Ping" an email address to see if that email is a real one that does not give any errors?
If yes, can you show what the VB.Net coding looks like to implement this?
I plan to use this in an app that requires the Customer email and it would be nice to validate it as the call taker enters it into a form before saving the Customer details.
Here is the code we are using to send an email promotion to all of the customers in our customer table:
Private Sub RibbonButtonSendTestEmail_Click(sender As System.Object, e As System.EventArgs) Handles RibbonButtonSendTestEmail.Click
Dim SmtpServer As New SmtpClient()
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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.
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I'm using vb in excel 2007 and need to work through a range or array, the size of which varies from time to time.
The examples of using range always demonstrate using literals eg "A1:A25"
How can I programatically determine the end of the range - ie up to where the cells value is blank
And then can I use a variable in the range statement - eg .[A1:Lastcell]
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).
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.
View 7 RepliesPublic extreme_foods As New System.Collections.ArrayList()
Dim i As Integer
i = 1
For Each s In split2
extreme_foods(i) = s
i = i + 1
Next
anyone know why extreme_foods(i)=s is giving INDEX OUT OF RANGE??
I'm building this class to download files in parts/sections/segments. In .NET 4.0, I can use this code to specify the range to download from
long startPos = int.MaxValue+1;
HttpWebRequest.AddRange(startPos);
and it works because there is a long overload for the AddRange method. When I looked up the .NET 3.5 version, I realised the AddRange() method allows using int only. The possible workaround would be using the AddRange(string, int) or AddRange(string, int, int) methods. Since the class will have to work in .NET 3.5, I'll have to go with the string specification but unfortunately I can't seem to find any sample code that shows how to specify ranges using this procedure in .NET 3.5. Can anyone show be how to do this?As the first code sample I wrote shows, I would like to specify a range of type long instead of int. Using type int allows requesting for byte ranges only up to 2GB but long allows requesting for byte ranges beyong 2GB.
The question therefore is: How do I specify byte ranges of 2GB or higher on HttpWebRequest in .NET 3.5?
On my form i have a textbox that users can enter a value into, how to i check whether the value entered in the textbox is within the range bewteen two other numbers?
i.e
Top int is 10
Bottom int is 5
The user enters 7 into the textbox
I want to check that the value entered is within the top and bottom range, and in this case as the number 7 is between 5 and 10 the answer would be yes?
If the user had entered 3 for example, then the answer would be no.
The Top and Bottom Int's will be set at runtime by the value entered into another textbox so will differ each time the user uses the form.
I have following code and I can filter data on grid but when I pick same date in 2 datepicker it shows nothing.
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I have a string array, and I need to get a range out of that, say 10 items counting from index 20.
I see there is an extension method called Take that can take a number of items from the beginning of the array, but I also need to specify the starting index.
i am using the below code but getting error.
View 5 RepliesWrite a program that will allow the user to be able to choose whether they want to add up a range of numbers in one of three different ways. 1) even numbers 2) odd numbers, or 3) consecutive integers. Use buttons for user choices.
Instead of limiting the user to just adding up these numbers you will also supply an Average Button that will show the average of the numbers rather than just the sum. Only the result that they have selected should be visible.
The program should look similar to the program below:
This is the program I was asked to make.
my code soo far is.....
[code....]
I couldn't figure out the formula to use for this but I assume its the same for each part of the program just with a little change.
my question is to turn the text in a text box red when it receives focus, and black when it loses focus. I seem to get that "index is out of range" pop-up message. [Code]
View 3 RepliesI am trying to make a tabbed web browser, on my first tab every thing works fine but on my 2nd 3th etc tabs when i try to do anything type in a url go home refresh anything it says index 0 is out of range perameter name: IndexI am new at Visual basic and i cant find what my problem is.
View 9 RepliessetFont(txtPKName, Trim(Main.gridview1.Item(2, 0).Value), Main.gridview1.Item(3, 0).Value, Main.gridview1.Item(4, 0).Value)
View 3 Repliesin my asp code i was using
<%
UserIPAddress = Request.ServerVariables("HTTP_X_FORWARDED_FOR")
If UserIPAddress = "" Then
UserIPAddress = Request.ServerVariables("REMOTE_ADDR")
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how could i do something like this in asp.net(using vb.net)
I'm getting the following error:
[ArgumentOutOfRangeException: Value to add was out of range.
Parameter name: value]
System.DateTime.Add(Double value, Int32 scale) +7657639
System.DateTime.AddDays (Double value) +19
...
The line from which this error originates has the following code:
expires = Now.AddDays(30)
It occurs irregularly and irreproducibly. The server date/time is correct and set to GMT. I've heard that it could be some curiosity to do with timezones, but that is speculative. It seems that we're some time from the year 10,000 yet, so I can't understand why adding thirty days to the current time could cause this! Culture settings perhaps?
why does this return an error:
Dim stuff As New System.Collections.ArrayList()
Dim i As Integer
i = 1
Dim split As String() = temp_string.Split(",")
[code].....
the stuff(i)=2 line is returning the mentioned error
