TCP Connection - Sending XML Information ?
Oct 12, 2010
I have legacy hardware in our building that can accept commands via TCP as long as they have formatted XML in them. Using Wireshark, I have determined the proper format of what needs to be sent.
The problem: When using the original systems controller, I can look at the packet that is sent and see very specifically that there is a section for "eXtensible Markup Language" that has everything laid out properly. When I create my own TCP stream and send the same information, it gets sent as Hypertext Transfer Protocol text, and thus is not picked up.
My code is as follows:
Dim tcpClient As New System.Net.Sockets.TcpClient()
Dim bytes(tcpClient.ReceiveBufferSize) As Byte
Dim clientdata As String = ""
[CODE]...
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Jun 9, 2011
The program is currently trying to pull information from three different database tables and compiling the information onto one screen, to do this i am using three different connections and a function to handle the data at each stage. The issue is as my code hits PageLoadStage of "2" and runs the QueryDatabase() Function i am encountering an error of: "OleDB exception unhandled: No value given for one or more of the required parameters." This occurs on line 15 of the first code snippet. Can anyone explain this and/or identify any code issues if that is the cause.
[Code]...
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Feb 2, 2011
I was looking for some stuff online, and i was looking through my reference sheets for vb.net, but it seems in the code i have found, there is declare in methods. Below is an example i am talking about. The thing is, that i dont recognize it and believe that it is an earlier version of Visual Basic ( 6 or earlier) which used it. Should i just keep looking for different code?
Public Declare Function RegOpenKey Lib "advapi32.dll" Alias "RegOpenKeyA" (ByVal hKey As Long, ByVal _
lpSubKey As String, phkResult As Long) As Long
Goal: Find information on how to implement a method which will check if a certain DSN exists, and then if it does, extract the information and use the information for connection purposes.
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Apr 2, 2012
I am working on vb.net 2.0 application which checks users credential against AD by sending LDAP configuration, user name, and password to DirectoryEntry method. LDAP is configured in web.config file. An AppScan result is showing that login request was not sent over SSL and recommends always using SSL and POST (body) parameters when sending sensitive information: DirectoryEntry("LDAPPath"), txtUserName, txtPassword)
How can I send this request against AD in a secure way?
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Nov 27, 2009
i'm generating HyperLinks, all of them (depending on the circunstance, could be 1, 2 or 1000) send to the same webform:
from default.aspx
to envia.aspx
i can't use session, or anything i already know, because i can't create as many methods i want (that would not be good, due to possible large numbers)example, there are three lines i print on demand:
house [link]
car [link]
flower[link]
i want the three links to load the same aspx webform sending as a parameter a string with these lines.
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Apr 11, 2011
Once I have inserted all details into my booking form I want to send some of the details to a form called "Daily Jobs Form", When I click the save Button on the booking form.On the "Daily Jobs Form" I have a row of TextBox's and at the Begining of the row I have a Button called "View Job" and When I click the "View Job" Button, I would like to be able to view the whole job. And Choose a driver who has Been Allocated the job.
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Nov 29, 2010
I have a question about loops that I don't know if it can be done. The program will send data through a parameter to an Oracle DB. What I am trying to do is during a loop I want to be able to send information from one text box, the next time it loops to send information from another text box ect. ect. I was hoping I go do it this way instead of writing out a bunch of parameters in both the program and in Oracle. Can this be done or do I have to write a whole lot of parameters out?
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May 29, 2012
I am new to web services in VB.net. I have imported the WSDL into the Visual Studio 2010, but using the .net 2.0 "Web References" framework instead of the new "Service References".I simply need to learn how to pass my API key and one other piece of information through the API to the server. This is all that I have. What code to I need to add to a) Send the API Keyb) Send the Database Mode String
Public Sub Call_Web_Service_Method()
Dim CallWebService As New PersonService.Header()
Dim sPostAPIKEY As String = CallWebService.APIKey()
[code].....
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Feb 5, 2010
I have a win form with three textboxes that lets the user input information using VB.net 2008. I am wanting the program to send me the information entered (when they hit the send button) as an email and also drop the information entered into an access database.I have the program sending the textbox information as an email.What I am having trouble with is saving the three textboxes to access database. I have an access database set up with a table and three fields for the three textboxes.
All I need to do is each time a user uses the program, it adds the information they enter into the three textboxes to the three different fields in the database. I don't need to let the user view or edit the database in any way.
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Mar 5, 2012
I have been working at printing receipts using printform, but the printer does not seem to be receiving any information from the form. Here is the
Public Sub PrintReceipt()
PrintForm.PrintAction = Printing.PrintAction.PrintToPrinter
PrintForm.Print()
End Sub
When I use the "PrintToPreview" print action, there is nothing shown on the screen.
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Jun 15, 2009
Is there anyway you can send information back to the original creator of the program? Here is a quick example- I made a little program that gives you general information about your computer, when you click a button it sets the text box to specific information. One of the text boxes gives you the Version of your OS. I would like to know if there is a way to send the information in that text box back to me when someone clicks it and they are connected to the internet. FYI I would tell the person who clicks it before so that I am not stealing information, plus what is there to steal from a simple program I made.
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Aug 19, 2009
I've created a simple licensing system for a friend who has created visual basic programs which he sells at a few dollars each (they're speciality programs).The licensing system is coded in PHP (I'm a PHP coder), and the system requires the user to input their license key upon start up, if there is not already an activated key (which is created in a .txt doc)
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Feb 28, 2012
I have a VB.net web service that returns JSON that works fine. Once the response gets to a certain size though, the client browser says that the server has closed the connection and sent no data. This is true using IE, Chrome, or Firefox. The magic size seems to be about 16383 records, or about 1.13MB of data. I know this is slightly large for a web service.
[Code]...
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Dec 31, 2011
I am having a very strange problem that started after installing the Visual Studio Service Pack 1. Let me first lay ground work, forgive me if it gets a little long, but I need to give all this info for this to make any sense.I was having a problem with one of my forms not saving changes made to the child data on the form. So I decided to rebuild the form with no code other then the bindingnavigatorSaveItem_Click and the load statement.
When I tried to save a change to the data with the new form I got this error message: �TableAdapterManager contains no connection information. Set each TableAdapterManager Table Adapter property to a valid Table Adapter instance.� Using a break point I stepped through the code into the DataSetDesigner.vb and found the error was originating from this piece of code
Dim workConnection As Global.System.Data.IDbConnection = Me.Connection
If (workConnection Is Nothing) Then
Throw New Global.System.ApplicationException("TableAdapterManager contains no connection information. Set each TableAdapterManager TableAdapter property to a valid TableAdapter instance.")
End If
I had just installed an update to Visual Studio 2010, Service Pack 1, so I thought that had hosed my entire project so I opened my previously created form to test a save with it and did not get the error. Very strange both of these forms are using the same table adapter manager and both jump to the same dataSetDesigner.vb code, so why the different results.
I then followed the code from both forms and saw something even stranger. The original and new forms follow the same code logic until they get to this piece of code in the dataset vb code:
If ((Not (Me._tblIncidentTableAdapter) Is Nothing) _
AndAlso (Me.MatchTableAdapterConnection(Me._tblIncidentTableAdapter.Connection) = False)) Then
Throw New Global.System.ArgumentException("All TableAdapters managed by a TableAdapterManager must use the same connection s" & _
[code]....
It then returns to the first If statement shown above and processes through without the error.has anyone had this error after installing service pack 1 for VS 2010 and if so did you fix it. And why would the code leave the If statement, jump to another function without any visible call to that function, that I can see.
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Feb 9, 2011
I have an application with a datagrid and a save button.Here's the save button
Private Sub SaveButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveButton.Click
Me.Validate()
Me.PlayerCharacterBindingSource.EndEdit()
[code]....
I'm getting the following error upon clicking the save button."TableAdapterManager contains no connection information. Set each TableAdapterManager TableAdapter property to a valid TableAdapter instance."
It's on this line: Me.TableAdapterManager.UpdateAll(Me.DataSetPlayerCharacters)
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Dec 22, 2011
I'm wondering if I create a program that connects to a mysql database, will they be able to decompile it and do anything with the mysql connection information?
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Dec 5, 2006
I am faced with the prospect of having to completely rewrite the application.I have suddenly started to get this error message all the time - it seemed to start after I added a table to the schema, but deleting the table makes no difference. I can't see anything wrong with the connection string, but as it seems to be entirely undocumented, that doesn't mean much.
The connection string contains DataSource=.SQLEXPRESS;AttachDbFilename=|DataDirectory| est.mdf;Integrated Security=True;User Instance=Trueand certainly the string works when I use "test connection" from the application setting edit box. I am assuming that for some reason it is not evaluating the Data Directory , but can't see any reason why it shouldn't. Any ideas gratefully received! What might be a clue though is that I can't get rid of the table I added. I have deleted it from the database, deleted it from designer and saved the file, but it just keeps reapearing! Even when it is not showing, there is still a
table adapter in the .xsd file. I am reluctant to start editing this manually because of the danger of screwing something else up - I did try but it caused an error somewhere else (VS helpfully didn't say where)
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May 27, 2012
I am trying to Send an Email with an attachment (using Gmail) but I keep getting errors like "Operation Timed out" or Failure Sending Email". It was working earlier today but I found out that i needed to add Using statement because the email was having a file open that had to be deleted after it was sent but afterwards it doesn't work.
Here's what I have (Portion of it):
Private Sub SendMailOneAttachment(ByVal un As String, ByVal pass As String, Optional ByVal smtp As String = "smtp.gmail.com")
Using oAttach As Net.Mail.Attachment = New Net.Mail.Attachment((Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData) & "\" & My.Computer.Name & "_" & fName & " .zip"))
Dim client As SmtpClient = New SmtpClient(smtp)
[Code] .....
The ports are correct I believe, no firewall up on my PC...
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Mar 4, 2010
Which is better for Sending Files/Sending Images/Msg for P2P Chat?
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May 24, 2012
I have a text box where i am entering numbers of double datatype andon the Keytdown event of the textbox some checks take pace and in certain circumstances I want to be able to stop the user from entering other information until they enter the right information in the textbox (where it says right here) . now when I say exit sub the textbox somehow loses focus . but this is not how I want it to be I want the textbox to remain with the focus so the user can change the information . How can i go about this. And the other thing is why is my txtDestPayRate1.Focus() just befor the exit sub not working?
Private Sub txtDestPayRate1_KeyDown1(sender As Object, e As System.Windows.Forms.KeyEventArgs) Handles txtDestPayRate1.KeyDown
If e.KeyCode = Keys.Enter Then
[CODE]...
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Dec 3, 2009
I am designing a backup/restore utility for work.atm i have been able to populate field for PC name, IP address, MAC address, number of printers installed on the PC but i am wondering is it possble to get all the printer information 'with the click of a button' to print all information like the prnmngr.vbs script down.I am able to run a batch file but i wanna get it to go from that app or even embed to batch file to the app and run it form there .
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Jul 13, 2010
I am tring to send e-mail used VB 2008. Below is my code. The error message I am getting is "5 Failure sending mail at System.Net.mail.client.send(MailMessage message).I have two questions. 1.) What am I doing wrong? & 2.) Is there a way the get a more description error message.
message As
New System.Net.Mail.MailMessage
Dim mySmtpsvr[code].....
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Aug 25, 2009
How do I assign a My.Settings.Item connection string to cmd.Connection connection string value?
Dim cmd As New SqlCommand()
cmd.Connection = My.Settings.Item("csStaffHoursWorked")
cmd.CommandType = CommandType.StoredProcedure
cmd.CommandText = "spSaveDeltekImport"
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Feb 5, 2010
Is there a way to display the connection properties dialog for connection string browsing(for database) in run time?
As I want the user to be able to connect to various database using the GUI.
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Aug 3, 2011
i have an application. which is executed after every 5 mins. i have an open connection but it gives me the following error:
ExecuteScalar requires an open and available Connection. The connection's current state is closed.
my code is something like this. I have shown where all i am using ExceuteScalar()
Sub Main()
Try
connection.open()
cmd.ExecuteScalar()
[code]....
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Aug 19, 2010
After running the following sub (VS debugger), I try to detach the database in SSMS, but it shows the connection open still and won't let me detach. If I close program in debugger, the database shows no connections. I check the dataadapter's connection in the finally block and is shows closed. What gives
Private Function ClientMasterDBFiles(ByVal MasterClientDBConnection As String, ByVal DBName As String) As DataTable
[Code]...
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Mar 15, 2009
I have a simple scraper. It works on some websites, but on some there is this Error:
Quote:
IOException was unhandled Unable to read data from the transport connection: The connection was closed
It is occuring at "Dim htmlresults As String = Urlcontents.ReadToEnd()".
'Create the HttpWebRequest object
Dim req As HttpWebRequest = WebRequest.Create(URL)
'Set the timeout to 1 second (or 1,000 milliseconds)
req.Timeout = 10000
[code]....
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Jun 21, 2010
I am attempting to write a program that will disable the Local Area Connection while leaving the Wireless connection enabled. My company is using net-books in our stores to demo air-cards and we need to keep them off of the LAN. I'm new to VB and VB.net, and it's been a while since I did any type of programming. I've gathered some code that others have posted in forums and tutorials and I'm working through a tutorial book, but I finally believe that I am stuck.
[Code]...
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Nov 30, 2008
i make a class and when i call on form then that error occurs "ExecuteNonQuery requires an open and available connection, the connection Current stat is close "
Class Code isImports System.Data.SqlClientImports System.DataImports System.StringPublic Class DatabaseKits Dim Cn As New SqlClient.SqlConnection Public Function BuildConnection() As Boolean Try Cn.ConnectionString = "Persist Security Info=False;Integrated Security=True;Trusted_Connection=Yes;database=BizAimsPro2008;server=Server-2k3s" BuildConnection =
[code]....
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May 17, 2012
I am connecting to a data stream that pushes data continuously and when I tried to set up a network stream I just could not connect and kept getting the 'not found' error. I used the httpwebrequest with webrequest.keepalive = true and started to consume the data by reading into a buffer and then appending to a stringbuilder. Once the stringbuilder reaches max size I flush it to a text file. The problem is that I get disconnected from the data stream because I am not reading the data fast enough. I need to keep the connection open and read the data while ensuring data gets stored in text files. If I use method "CONNECT" it does not connect to the stream.
While (True)
webrequest = DirectCast(Net.WebRequest.Create(url), HttpWebRequest)
webrequest.Credentials = New System.Net.NetworkCredential(username, password)
webrequest.Method = "GET"
[code]....
should I increase the buffer size and if so what is the max? that would mean I can read more data at a time and keep up with incoming push. Disparate here.
ACtually also I noticed that it gets stuck on this line
numbytesread = responseStream.Read(bufferread, 0, BUFFER_SIZE)
and then eventually I get disconnected.
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