I am currently writing a visual basic program that gets data from a serial port. everything is connected up but the data is not received until my device on the other side is turned on on the other side. which condition can i use in my loop to ensure that i only start comparing when i have started to receive so that my loop will not hang as there is no data input?
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I need to control a device with a GPIB port. I have the commands that I need to use to do this; but I don't know which is the sintaxis in Visual Basic.
For example if I need to send a instruction like "START:0.01" to the external device which are the libraries that I have to include?, how should I write the programming line to do this?
The main tasks that I need to program are sending data, receiving data, and saving data
I've code this code below:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim hwrRequest As HttpWebRequest = HttpWebRequest.Create("http://www.example.com/web-service.php")
[Code]....
The MsgBox() at the end shows the response, which as I've added to my script, echos the result from the $user and $pass variables which are supposed to retrieve those details being written to the stream above, but they show up empty.
I'm retrieving those values by doing: $user = $_POST["user"]; $pass = $_POST["pass"];
I'm currently working on an ms access database in vb.net. And I need a code that can determine which data I am updating in the database. Because when I try to update the data, the previous data is being cloned and it will generate two data(the updated and the previous data), and the program will also generate a random id number for the updated data, which is not good.Here is my code for the update button:
[Code]...
I have a dataset and want to know the data type of a specific column. The GetType returns datacolumn not string or integer etc.iggy!
View 2 RepliesAssuming rnameTxt is a textbox and is bound to a field is a DataSet named "TableData".
rnameTxt.DataBindings.Add(New Binding("Text", TableData, "Customer.rname", True))
Masters of the visual basic arts, I, a lowly noob, would just like to ask for your wisdom (and mercy). For my program needs to determine if the data grid view has any content because if that certain datagridview doesn't contain anything, then I would disable a couple of functions for the program.
View 2 RepliesWe have some predefined strings that can be inserted into a text box during data entry via a button click. How can we track the cursor insertion point so the inserted code is in the right place if the user clicked somewhere in the middle of the data before clicking the button?
View 3 RepliesThe Question sound like this.Assume the theater keep 20% of its box office receipts. Use the Following test data to determine if the Application is calculating properly :
[Code]...
Im woundering how does Receiving/Sending data work in a TCPClient/Server that is connected in the same networkstream.
View 4 RepliesI'm having a heck of a time figuring this out, the tutorials I found on the web are not complete or are for VB 6.0 (obsolete in some cases). On the C++ side I have the following ::
hwndExternalApplication = FindWindow(NULL, L"Dromocast Client");
SendMessage(hwndExternalApplication, WM_SETTEXT, NULL, (LPARAM)"Hello");
"Dromocast Client" is my visual basic application, and I checked to make sure it's not NULL. In fact I get made sure I'm getting some data on the VB side. On my Visual Basic side I have the following
[Code]...
When I send the data over it's garbage, meaning strTemp comes out as all these chinese characters, and my title bar on the visual basic program gets garbled with a bunch of chinese characters as well. My guess is my "SendMessage" is written wrong, or I'm doing something silly, but I have no idea what. I'm not a windows programmer so I'm kinda trying to figure this stuff out by googling.
Currently I had write a simple VB code, my aim is when i click "Forward" button then the vb will send a character "A" to PIC, "Reverse" button will send "B" so I write my vb code for sending as below:
Dim Forward As Char = "A"
SerialPort1.Open()
SerialPort1.Write(Forward)
For the receiving part, after I received the data from PIC then I will show it at the label which act it as a screen. the receiving code as below:
SerialPort1.Open()
receive = SerialPort1.ReadChar()
If receive = "A" Then[code]....
I am working on system support for an electronics project wherein I have to receive an 8 bit (binary) data through a USB port and store either the binary or the corresponding decimal into a variable. How can I implement this in visual basic 2010?
View 11 Repliesi have a similar question so i thought i might post it here rather than clutter the place with a new thread, if that's okay.first off, i'm using VB 2010 Express, if that makes any difference.second, i'm trying to send data to form2 from form3 rather than the other way around. i'm still pretty much new to VB, but have a lot of experience in PHP and some in java. i'm making a basic program that creates critters on form3 and then adds them to a table on form2.[code]then adds a value of 1 to the progress bar (i still am trying to figure out how that works) on form2.
View 3 Replieshow to connect and view data in a sql databse table. Does anyone know how to send data from say two textboxes to the table [Code]
View 3 Repliesi have created a MDI form and i have a child form that collects data and inserts it into access 2010 DB however it does not work .my code is odd and i am trying to use mysql syntax here is the names and opject types used in the sql code
intID = a text field that is autogenerated with a number
txtFirstname.text (text field)
myDOB is a DATE variable which is collected using a date picker (myDOB = dpDOB.Value.ToShortDateString)
same goes for mysubs
SQL
metag
INSERT INTO members (ID, FirstName, surname, DOB, SubsDate, HouseNo, Street, Town)VALUES ('" & intID & "','" & txtFirstName.Text & "','" & txtSurname.Text & "','" & myDOB & "','" & mySubs & "'" & txtHouseNo.Text & "'" & txtStreet.Text & "'" & txtCity.Text
i then get nothing but errors
I am sending some data over a networkstream. The datasize is 97 The buffersize is 1. Data is a list of bytes. When the bytecount reaches 94 the do while loop exist itself.
[Code]...
I have a program that I collect data using a com port. I display that using special visual controls - no problem here.
What I would like to do is to send this same information out over the network via ethernet to another PC located in another room.
I presume I would have to have another copy of the program on the second pc as the information is simply duplicated but I am not sure how to get the data out of one to the other
Is there a way to determine if a System.Net.Sockets.Socket has sent data that has not been received/read by a specified remote endpoint with a connectionless protocol?It never hurts to try.
View 1 RepliesI'm using VB 2010 Express with a local Access DB. I am having trouble determing whether there are changes in a DataGridView to save back to the underlying DB.
The DB has been copied to the project directory and its properties (by selecting it in the Solution Explorer) include Copy to Output Directory: Copy Always, so I know that any changes I make when running a build will disappear on the next build. The problem I'm having is within a run / test session, working with the application.
The Access database has the following connection string, with Application scope:
Provider=Microsoft.Jet.OLEDB.4.0;Data Source="|DataDirectory|Component MI.mdb"
have gps constantly sending data but can read it from the com port
View 5 RepliesI'm creating a search form using an asp:button control with the urlpostback set to a results page. The problem is, the asp:button uses Visual Basic and the search results from Google require Javascript.
Is there a way to take the data from an asp: textbox in VB and then send it to another page that uses Javascript and use the data?
Given the following information
Public Enum Request As Byte
None = 0
Identity = 1
License = 2
End Enum
Protected mType As Communication.Request
mType = Communication.Request.Identity
Debug.Print (BitConverter.GetBytes(mType).Length.tostring)
2
Why does bitconverter report that mType is a length of 2. I would have thought that passing a Byte into BitConverter.GetBytes would just return the Byte. I mean it's no big deal because it's only sending a very small block of data across a TCP Socket, but I'm just intrigued why it thinks it's 2 bytes.
I have been using RSACryptoServiceProvider and was using the template code provided from the MSDN resource page.url...I wanted to encrypt the data on my computer and transfer the data to the FTP server and have it decrypted there. I have the encryption and decryption code but it is in the same program and only work during the instance it is open. The intention is to have a program that will encrypt and send the data to the FTP Server. There will also be a VB Script on the server to decrypt the data and store it in a separate location. How do I get it to store the public key on my computer and the private key on the server? Also, how to I transfer the encrypted data over to the FTP and have it saved there?The purpose of this project is that we have people located over the globe and are sending sensitive information to an FTP server at the home office. My boss has insisted on the data being encrypted before sending anything. But, on the server it will be decrypted so that a select few can go through the information.
View 2 RepliesI'm working on a project that involves sending information through a GSM module, this module is connected to the system through a USB port. the information to be sent is gathered from a database using VB, now I need to send the information from my VB program to the USB port for onward delivery to the GSM module.
View 2 Repliesproblem is when i enter any letter in the alphabet in textbox1 it gives me an error but when i enter any number on it, it goes perfectly to the database. i set the data type into text(all 3 of them). the other two textbox work just fine. textbox1 is the only problem.
i just want the textbox1 to accept any input not just a number like the other 2 textbox work..
heres the code:
Imports System.Data.OleDb
Public Class Form2
Dim cn As OleDbConnection
[Code]....
How i can send data from one form to another form through a network? i'm not asking for the codes, i just want to know what i should do to accomplish this task. i'm conceptualizing a game with the following details:
1.) there are two players, connected through a network
2.) they take turns looking for words from a puzzle of randomized letters
3.) after the given time has elapsed their words are checked and if both players has the same word, the word is removed
4.) the score is tallied
My question is, how do i get the words from the other form? specifically, how can the server form get the words from the client form? is it possible if i use xml? or can the server form access the variables of the client form? (i don't think it can, though)
Actually I have created a chat application is it possible to send data to particular client only?
View 1 RepliesWhat I need is, a program will be distributed and the customer fills it out and such, clicks submit, and the data is sent to the company. I want to avoid using SMTP since not all consumers will have it set up. Is there anyway where this could be done, for the general user? I've spent the day thinking, but have no come up with anything.
The code, to send the info out, will just take the data from text fields, and sent it to either an email (hopefully not) or a place where the company can view it.
i am doing a project in vb 2008 .net.during execution of the code, a different number is generated every second. the numbers are either 0,1,2,3,4, or 5. how do i send this number every second to the serial port. at the serial port i have a microcontroller connected which should accept this number and light up an LED coresponding to the number received.
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