I have this code that keeps giving me two problems.
first:The requested address is not valid in its context
second , it receives broadcast it sends, i dont want this. I want only the listeneing server app to receive the broadcast....the sending code
Dim sendMessage As New structMessage
sendMessage.Command = Command.IP
Dim byteData As Byte() = sendMessage.ToByte()[code]....
I get this error.. and I know the ip address is not valid duh! but it's a server it should be based on port only.
Error =
Errors at runProxy @ The requested address is not valid in its context
0.0.0.0:7900
[code]....
P.S.> my client I connect to 127.0.0.1 : 7900..I want it to re-route the connection to the txtIP.text : 7900 (txtListeningPort.Text)
"The requested address is not valid in its context."
[Code]...
how can i solve this problem?
View 6 RepliesI did a simple program using tcpclient on xp last year and it worked fine but now I have vista installed and I am getting an error now when i try to connect.
The error is "An address incompatible with the requested protocol was used."
Are 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 RepliesI am developing client application I store client details with e-mail address. but I give permission to users to entry valid e-mail address of every client, In that case I will check valid e-mail address for that how to check the given valid e-mail address
View 2 Repliesi am trying to test if the characters in a string is a valid MAC Address
but my code
dim getMAC as string = "22:13:35:67:49:ab"
If Regex.IsMatch(getMAC, "/^([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2}$") = True Then
messagebox.show("is valid")
[Code].....
Currently, to avoid errors from being thrown up due to invalid email addresses, I do the following:
Dim mailAddress As MailAddress
Try
mailAddress = New MailAddress("testing@invalid@email.com")
Catch ex As Exception
'Invalid email
End Try
However, rather than depending on Try..Catch, is there a way of validating that the email address will be 100% valid for the MailAddress type?I know there a plenty of regex functions out there for validating emails, but I'm looking for the function which the MailAddress type uses to validate its addresses.
When bulk renaming files (14000 of them) i get this error: The CLR has been unable to transition from COM context 0x4cefd8 to COM context 0x4cf148 for 60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows messages. This situation generally has a negative performance impact and may even lead to the application becoming non responsive or memory usage accumulating continually over time. To avoid this problem, all single threaded apartment (STA) threads should use pumping wait primitives (such as CoWaitForMultipleHandles) and routinely pump messages during long running operations.
My code is as follows:
Private Sub frmTest_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim asd As List(Of String) = FileIO.FileSystem.GetFiles("D:Music").ToList
Dim rs As New ADODB.RecordSet("SELECT * FROM Songs", My.Settings.Files_Database__Connection)
[code].....
I am calling this function when a button is CLICKED and received the error; The name "The" is not permitted in this context. Valid expression are constants, constants expression, and (in some contexts) variables. Column names are not permitted. Unclosed quotation mark after the character string 'True)'.
The function is as follows;
Private Sub Save()
Dim conn As SqlConnection = GetDbConnection()
Dim query As String
Dim cmd As New SqlCommand
I got this message because of a long process: ContextSwitchDeadlock was detected
Message: The CLR has been unable to transition from COM context 0x3dc190 to COM context 0x3dc300 for 60 seconds. The thread that owns the destination context/apartment is most likely either doing a non pumping wait or processing a very long running operation without pumping Windows messages. This situation generally has a negative performance impact and may even lead to the application becoming non responsive or memory usage accumulating continually over time.
To avoid this problem, all single threaded apartment (STA) threads should use pumping wait primitives (such as CoWaitForMultipleHandles) and routinely pump messages during long running operations. I've poked around on the internet and on a forum, someone suggested to use application.doevents(). I did that and the messaged goes away. In an earlier thread a member wrote that using application.doevents rarely was used appropriately. Is my situation a proper usage of application.doevents or is there something else I should be doing?
SocketException was Unhandled: Only one usage of each socket address (protocol/network address/port) is normally permitted I get this error every time i click collect a second time.
[Code]...
Can anyone point me to some code which can help obtain the network address from the host IP and subnet mask?
View 3 RepliesI made web browser which consist address bar that I use it to type addressess in it i.ewhen I type [URL] it opens [URL] but when I go to anther page in google it doesnot show it's link in address bar lix InterntExplorer or other international browsers so how to show any link or any sub page's link in my browser address bar ?
View 1 RepliesI'm trying to use the DHCP API (using the references on pinvoke.net) to retrieve a computer's MAC address when given the IP address but I can't get the code to work. I've run all the C# code on pinvoke.net through the C#-to-VB converter but I'm stuck now.
Here's what I have so far. The value of res is always 5 (should be 0). Thing is, I can't find any documentation on what the return codes mean
vb
Private Sub GetMACDim client As String = "1.1.1.1" Dim server As String = "0.0.0.0" Dim si As New NativeMethods.DHCP_SEARCH_INFO si.SearchType = NativeMethods.DHCP_SEARCH_INFO_TYPE.DhcpClientIpAddress si.ClientIpAddress = Convert.ToUInt32(StringIPAddressToUint32(client)) Dim res As UInteger Dim oInfo As IntPtr
[code]....
' Use Your work Group WinNT://&&&&(Work Group Name) Dim DomainEntry As New DirectoryEntry("WinNT://Wokgroup") DomainEntry.Children.SchemaFilte
[code].....
how I can Encrypt the data that is requested/sent? I wrote an application that connects to MySQL to INSERT/UPDATE/READ information from/to. The application also connects to a website of mine. I have obfuscated the codes so that people can not simply de-compile it to see my information. However I, or anyone, can simple use Wireshark or Fiddler to see information like...
How can I encrypt that so i can at least feel a bit safer... the attacker can also use replay attack on my website until they get into a user's account...
When I installed Visual basic 2008 express edition it seemed to work, but when i was going to make a project it pups up a error box and it says: Regestry it not allowed.
View 2 RepliesI have a text file that has thousands upon thousands of URL's in it. I wrote a program to go to each of these links in succession (via For loops, obviously) and to grab a piece of information from them.Now to the problem. When I get to about 2300 or so, I get the error "COMException was unhandled by user code. The requested resource is in use. (Exception from HRESULT: 0x800700AA)" at the line "WebBrowser1.navigate(linkstocheck(i))"
I set linkstocheck = all lines of the text file. I get the same error even when I get the link directly from the lines of the text file. Does anyone know how I might go around this? Maybe catch the exception, wait half a second, then continue where it got the error?
I've using vb.net 2003 and some of the times this error arises. Can anyone know on how this error arises and how to fix it?
Error: The requested clipboard operation failed
The application run normally fine on several computer but today we got the error
View 6 RepliesI am testing an application. In tableadapter configuration wizard, On server side:While choosing data source, I chose Microsoft SQL Server Database File.This gave the connection string as:[code]Now I want to use the same application on Client side (off course databse is stored in Data Directory of my application in Server Side) Now in tableadapter wizard, I choose Microsoft SQL Server Express.Is that correct?I have done all configurations for remote connection etc. and also done the firewall settings.When I run this test on client side, it returns error:Cannot open database "Database1.mdf" requested by the login. The login failed. Login failed for user 'MYHOMESERVERKh. Furqn'.Why does it go to Kh. Furqan while I am giving it SQLExpress, where the DB is attached. My server is MyHomeServerSQLExpress and connection is MyHomeServerKh. Furqan (Authentication is Windows Authentication, and no password for it)
View 1 Repliesis there a way to detect if the user is shuting down?
View 1 RepliesI am using a MasterPage with a dynamic menu bar across the page. If the user has requested a redirect back to the login (home) page, I don't want to log them out but I do want to hide the menu bar. Currently I am using whether the user is authenticated to control if the menu bar is visible or not.Basically, I want to always hide the menu bar when on the login page.The menu is rendered prior to the page itself so I need to be able to read the redirect request to see if the login page is the destination.
View 3 RepliesI am writing an application in Visual Basic .NET requiring Registry access.Whenever I try to read from the registry, I receive the following error message:"Requested registry access is not allowed"
View 3 RepliesVB express 2008 .net 3.5 or .net 4.0 VB express 2010?I have written application to convert RTF to HTML. The main Purpose of the application is to copy VS code to the clipboard and covert it then put it back into the clipboard as a HTML Document so that it can be pasted into a HTML document such as Windows Live Mail. I found that code copied and pasted is spaced out in in the wrong positions.
The applications works perfect with no bugs so far. I then asked Myself how to go about doing the copy with the least amount of operator interaction. So I added an Icon to the Icon Tray with a right click menu to use to convert once the Rich Text Format was copied to the clipboard. This works fine except you have Five steps, Select the text, Copy to clipboard, Right Click the icon, Select the Converter and Paste. The normal is three steps.
To this the best solution is to add a context menu item to the active form such as the RTF editor or window. So that when you select the Rich Text to copy and right click on the form to bring up that menu then to Just Select the menu Item such as "Copy RT and Convert" I searched and found about 544000 Items and tried to restrict down to no avail. I read until I finally gave up. I did not find any code examples of this. Almost every thing I found related to the web or some other explicit document like Excel and not to the Various windows that could be active with RT in it.
how do you add a context menu item to the context menu of an active rich text format window such as WordPad or VB?I have test in my application that tests to see if it is a RTF in the clipboard so if it is not the converter does nothing.
Imports System.Threading
Imports System.IO
Imports System
[code]....
Here is the thing! Always when I start VB express 2008/2010 and press "Create New Project" It only gives me back this:Requested registry access is not allowed. How should I solve this problem? Please contact me as soon as possible With the best regards: Kasper Lehtinen, Finland
View 2 RepliesI have created a web service with VB .NET 2005 that is connecting to a DB2 database through a third party ODBC driver of DataDirect and simply adds a row to the table.The service is working properly.Because I had to move the service to a server and the DataDirect driver that I have works only for client use, I needed to change the ODBC and use the DB2 Connect ODBC driver for the cause.
View 2 RepliesI have a datagridview on a form which is populated with data from our backend database. A few of my users are experiencing a problem when they select all the cells in the datagridview and try to copy and paste the contents into something such as Excel.
The error is: Requested Clipboard operation did not succeed.
Having searched for information on this error it appears that if a process has the clipboard already open (such as office) this will cause the exception being thrown (which is a system.runtime.interopservices.externalexception), usually when the code calls the clipboard.settext method (which I do not). However my form and its code does not even contain anything to do with clipboard manipulation, copy and paste or anything remotely to do with using the clipboard so I am unsure as how I can actually catch this exception and just report back to the user?