I am trying the following code using vb.net and have managed to capture the running application values via portmon... look likes below and connects with success:
QUESTION: What is the HyperTerminal Equivalent string value for this Keystroke Sequence: Ctrl-A Shift-V Ctrl-B 02 1234512345 Ctrl-C Ctrl-M The above works great using a windows HyperTerminal window and writes data to the device.
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I try to write a application to make the communicate noise meter with PC, and following are my code[code]...
Why it does not work at all, and a sentence kept pop out in immediate window. "A first chance exception of type 'System.ArgumentOutOfRangeException' occurred in System.Windows.Forms.dllyvonne
I have written in VB.NET a POS application.I'm using one thermal printer connected to COM1,I create a bat file wit this command :
copy mydata.txt COM1:
I run this bat and printer is working fine.I've installed my application on a second computer in the network and I need to print from there to the same printer,but is located on another computer.So how I use COM1 over the network,I've seen that for LPT port can be used
NET USE command.
I have code that:
Private Sub RadioButton1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton1.CheckedChanged
If Serial.IsOpen = True Then
[Code]....
Opens a serial connection when a radiobutton is selected. My question is: How can I make a message pop up saying "COM Port in use" if the radio button is selected when the com port is in use by another application? Right now, the program just crashes.
In the developing environment the computers do not have com ports, but I am working on a project for a client who does. It is annoying that when I test the program on my computers I always get the error. "The port (COM1) does not exist"
I am catching the general exeption but the debugger stops there anyway. I can press "continue" and the program resumes but I would like to clean that up and not try to open the port if the computer does not have one.
vb.net
Try
SerialPort1.Open()
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lblNoCOM1 just tells the user that there is no serial port and that the barcode scanner is not working.
I am trying to read data from serial com1 port. Now, I am not sure how to send. I found so many method to send but that are not so good and I cann't read any data. I am using VB.net 2005. Which is the best way and how can I read and send?
View 1 RepliesJust trying to capture some text data flowing in on COM1. The port opens but the data does not flow in. I have a textbox on the form and a SerialPort in the tray.
Public Class Form1
Private Sub IncomingData(ByVal sender As System.Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived
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I'm currently developing an application on Visual Basic (2010) which requires the use of a Thin Client's serial port. I have already activated the port mapping, and tested the communication (successfully) with PuTTY. How ever when trying to use my software y receive a message The selected port name is invalid, or it is not a serial port.I have already made some successful tests with a common PC with positive results.
View 6 RepliesI want to send a simple command, such as "v20" followed by a carriage control character, to a heating/cooling block connected to a desktop computer running Windows XP. I am able to get the commands to work within a terminal emulator. I want to compile a simple program that will be executed by software used to control a liquid handling robot.I've looked at the how to send strings to serial ports in visual basic page and modified that code ever so slightly to send the data that I want. However, it does not work and my heating/cooling block is not changing temperatures.
Here's what I have written:
Sub SendSerialData(ByVal data As String)
data = "n65"
' Send strings to a serial port.
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I use visual basic. net, I would like to communicate with a device via COM1. Sending a command in the HEX format for example 02 00 05 15 ... and take the device to respond in HEX format. these commands I found on the Internet.
Private Sub Button1_Click () Handles Button1.Click
MSComm1.CommPort = 1 'Use the COM1 serial port
MSComm1.Settings = "4800, N, 8.1"[code].....
I bol pioneer of this program looking at Google, but I was never clear. meetings drgač this would be doing, but the service not to a significant'd be best if someone had already written CODO. better, but also that we already sent someone made programs
I am trying to make a program in vb 2005 to real all the data from a device connected on Serial Port (Com 1).i did this: [code]and this is how i want to reciveit.when i lounch the program i only receive first line "410001+00000001" and after that i get on the device rs232 error.
View 6 RepliesI'm trying to read barcode using a scanner through a serial input(com1). Below you will see the code I'm working with, when I scan the barcode the code goes through the datareceived event and doesnt add the read barcode to the listbox. However when I use hyperterminal and scan the barcode it reads and displays the barcode.
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I have a long UTF8 encoded text string. The actual values stored in the string are hexadecimal. I want to convert the encoding and save to a binary file.
Is there a simple encoding.convert or other method to do this with?
Basically the output is twice as large as it needs to be right now. The long way of doing it would be a routine to go through the string two characters at a time and convert to byte array and then .writeallbytes I guess. It seems there must be a simpler way of converting this?
I've set the colour of a label using the ColorDialog and I want to read the chosen colour value into a string, using the following
ColorDialog1.ShowDialog()
label1.ForeColor = ColorDialog1.Color
For example, I have chosen, say, blue as the colour.. How would I read this value into a string, or the hex code for this colour?
I am trying to write the value of 3 variables (Username, Email, Password) to an SQLite Database. I can write text to the database but not a variable. How would I do this?
My Code:
SQCommand.CommandText = "INSERT INTO login_data (username, password, email) VALUES (Username, Password, Email)"
I have written a program which reads the text from the text file cleans it for some specific letters or phrases and then saves it in another text file. I am having a problem in rewriting the processed or cleaned data (after it has removed some phrases and characters)onto writing the file.
I have successfully written the text on the file except one problem. In each loop when each string is cleaned and is written on the text file, it overwrites the previous string. What I want is that it should write in the next line or in the same line.
My code is given below:
Private Sub btnopen_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnopen.Click
FileOpen.Title = "Please select the file"
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how can I write the text in the new line and avoid overwriting of text in my text file.
I have a fairly old radio receiver. (Icom R70) A friend and I have built an interface to control it from my computer. The interface is parallel. For me the interface is a black box. (My friend is the electronics specialist) In the description (25 years or more old) the statement to set a frequency and receive mode (like Am, FM etc) on the receiver is:print ".0:087330"
Today I am working in VB.Net and on Windows7 pro. I have already spent several days figuring out how to do this, but can't get it to work.I have found inpout.dll, but that does only allows me to write one byte at the time, and if I break up the above string and send nine individual characters, it does not work.
I've two Strings which I'm loading from a SQL Server 2008 database (nvarchar-field)After loading them from the database Visual Studio 2010 displays them as follows in the watch window:
str1 = "Test"
str2 = "Test"
But the comparison with str1 = str2 returns False If I write those strings to a file with UTF8 Encoding the result is as expected:
Test
Test
If I write those strings to a file with ANSI (Default) Encoding the result is NOT as expected:
?Test
Test
Converting the strings to bytes:
System.Text.Encoding.Default.GetBytes(str1) 'Returns ByteArray {63, 84, 101, 115, 116}
System.Text.Encoding.Default.GetBytes(str2) 'Returns ByteArray {84, 101, 115, 116}
System.Text.Encoding.UTF8.GetBytes(str1) 'Returns ByteArray {239, 187, 191, 84, 101, 115, 116}
System.Text.Encoding.UTF8.GetBytes(str2) 'Returns ByteArray {84, 101, 115, 116}
Where is the Byte 63 in case of ANSI Encoding OR Bytes 239, 187, 191 in case of UTF8 Encoding for str1 coming from?Well, Bytes 239, 187, 191 are the BOM for UTF8. The question here would more likely be: Why do I get the BOM for str1 but not for str2?(Well, the values are values passed to a webservice which inserts them into the database, the initial values are passed to this webservice by a client I've no control over)
Well I basically know how to read a text file, replace text then write to one. how to append text after a specified string (ie, insert text at a specified line, removing the text after a string in a line and changing it without altering other lines, etc). Can someone please tell me how I would go about adding a string after a certain string in a text file? For example:
I Have:
test
example
hello
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I'm outputting a number of variables to a text file and each field needs to be in a specific place.For example:I have a string that is varying in length, but will never be more than 5 characters. The string has to end on the 8th character of the line. Is there a way to write the string to ensure that the string ends at a specific place on the line, regardless of the length?
View 4 RepliesI can write a 1-d string array to file with:
Dim test() As String = {1, 2, 3, 4, 5}
File.WriteAllLines("C:MyFile.txt", test)
but can't see how to write a 2-d array to file.
I've tried this:
Dim test(,) As String = {{1, 2, 3, 4, 5}, {34, 22, 12, 33, 55}}
Dim myfile = File.CreateText("C:MyFile.txt")
Dim row, col As Integer
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I've made a function to convert a number and fraction string eg. "22 7/8" to decimal. I've no problem pulling the data from the current row cell to pass through the function. Checked it via a temp textbox i put on the form. What i actuall want to do is pass it back to another cell on the current row. Tried a few things but having no luck. Here's the code of what works. The name of the cell i'm trying to pass the result back to is called "BaseDec".
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim fact As String
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I am writing the code as on if statement that if the html class has strings called "<a id=""rowTitle1""(.*?)</a>" then do something. In what property that come after pattern that I could check the string whether if it valid or not??
View 13 RepliesHere is a code to insert data to DBaccess from textbox. When I write a colon(') in the textbox to add to DB it caused error and show me this Message "Syntax error in string in query expression '''')'
Code:
Dim conn As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;" _
& "Data Source =" & Application.StartupPath & "Store.mdb ")
Dim cmd As New OleDbCommand
cmd.Connection = conn
'Add text to DB
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actually this is not an vb.net code belongs to vb..i have written it for getting the data from com port 1.but i dont know what data the com port is getting..
Dim Lng As Long
Dim lpPoint As POINTAPI
Dim X, Y As Long
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Im having problem with the Serial Port. When i run my program, "Access to the port 'COM1' is denied". What does that mean? Im not sure whats happening because theres no error in my code. Someone suggest me to use 'COM2'. Which is also the same result. I have a microcontroller, programmed and run it. And i need to capture the data onto my vb, which is on a multiline textbox. How to i do that?Just to double check my code?
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I have a label printer (Argox 1000-x) and i want to print some datas on it. And this printer is connected to my computer via the COM1 port. I can open/write COM1. And when i send some data to printer through COM1, Label Printer's Ready Signal Led will be ON/OFF. But it does not print anything or any label..
View 5 RepliesCan I do anything more or less with IDictionary? How do these two collections differ?
View 5 Repliesmy code is :
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The error is Value of type '1-dimensional array of string' cannot be converted to 'String'.
How write folllowing into cmd schtasks /create /tn "savita"
Here savita is value in the textbox1, i dnt knw how to write " into cmd
