Write The String "AABBCCDDEEFF" Then Click Send Textbox2 Will Then Display "BBCCDDEEFF" Or Just "DDEEFF" - Serialport Writetimeout
Aug 18, 2010
I have set up a serial port program, where the serialport writes from textbox1 then reads to textbox2 when you push a send button.The problem is the serial port seems to have its own writetimeout function. here is an example of my error:
say I write the string "AABBCCDDEEFF" then click send textbox2 will then display "BBCCDDEEFF" or just "DDEEFF"
what seems to be happening is that it will kick in whenever it wants to and just read portions of the text sometimes it will even seperate it out into two or three lines.
This only happens about 1 out of 5 times when I hit send, but it is an error that I would still like to have fixed.
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Oct 10, 2009
I am using Visual Basic 2005 and Serialport class. My target device is a WinCE 5.0 Emulator.When I send bytes using serialport.write(byte(),offset,count), the serial port always output "0D 0A" between the bytes and after the bytes sending complete. like this:34 0D 0A A5 5A 0D 0AHow to stop ouput the '0D 0A"? It seems like a terminator "", I have tried to search the serial port settings but cannot find the proper setting. The seiral port is 19200, no parity, one stop bit, 8 bits.
Imports System.IO.Ports
Imports System
Imports System.Windows.Forms
[code]....
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Feb 1, 2010
peoples The User of my application will enter Hexa values in text boxes (00h to FFh). I need to send these values through the serial port, but so that EACH text box with values 00h to FFh ONLY generate ONE transmitted byte, exactly the value placed in the text box.
Just found examples of this application in VB6, using the following command:
MSComm1.Output = (Chr(Val(txtText1.Text)))
In VB2008, you use the component "SerialPort", and one of the methods for transmitting data to the output buffer is "Write". So I did it this way:Dim As Integer ValHex
[Code]...
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Oct 14, 2009
I have a program where I need to periodically save the data to a database (if the computer suddenly shutdown) and also send the same data to a serialport.Alla data that is going to be sent and saved resides in two classes.his needs to be done every 1/10s.What's the best way to manage this?
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Sep 21, 2010
i am wrting a modbus RTU code for communicating with devices I intend to end modbus query with wight bytes to be sent 1 , 3 , 0, 3,0,5, &h79, &hc5 the third and fifith bytes which are zero are not actually writen into the commport How to do this ?
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Oct 3, 2011
I have one project that I need help writing that I have spent months trying to write with no luck. Anyway so here is my question. I want to write a program that can display a phones filesystems that is connected to my computer by a serial port. I would like to be able to Read/Write files and stuff if possible. I have tried many ways of doing this so this is my last resort.
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Jun 6, 2011
heres my code
Dim con As New MySqlConnection("server=localhost; user id=root; password=phoenix0931; database=accounts;")
Try
[Code].....
my Problem what code will i add if im going to display my customer_add in my textbox2 match on the record that i pick in the combo box..
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Sep 3, 2010
how to recive data from serialport & send it to anthor pc running my program & resend to the same serialport on the other pc?
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Aug 27, 2009
i am developing an application which needs to connect to a weighjng scale throug rs 232 and capture the output. after inserting the record however the pc needs to send the tare command to the weighing scale in order to set the scale to zero. now he tare character as far as i guess ia T i sent the command like this
serialport1.write(chr(27) & "T" & chr(13) & chr(10))
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Aug 16, 2011
i am writing my very first program with visual basic 2010. my question:
textbox1 + textbox2 = textbox3 if i want to add textbox1 and textbox2 together and display the value in textbox3 WITHOUT creating a button for a command, what do i have to do?
basically, i want the value to appear in textbox3 automatically when i input textbox1 and 2.
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Jan 26, 2011
I want to display the gmap ..if i enter City name in textbox1 and another city name in textbox2 then the gmap will display and the both cities will be highlighted in the gmap with its distances ...i wanna do this using vb.net, asp.net.
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Dec 7, 2009
I have a basic confusion between serial port and network TCP communication to devices.
My colleague uses a vb struct as the nice easy to read way to create a packet to send out via a serial port. Like this basic code sample below of his vb.net serial call followed at bottom by my c# tcp beginsend network call.
Can I use a struct as well to call out for my TCP network beginsend? By looking at the signature of BeginSend(Byte[] as the beginning of the signature for that method call to send data to a connected socket, I don't see myself being able to use a struct.
Public Structure PacketRecord
Dim SourceAddress As Integer
Dim DestinationAddress As Integer
Dim Length As Integer
[CODE].....................
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Apr 6, 2010
I am writing a program to be able to input a password and take that password and display a new password in a label. the new password will display the results as follows. Any vowels in the old password will be displayed as an x in the new password and numbers will be displayed as x's, and the last part it will display in reverse order so if I enter in timmy1 it should display zxmmxt. I do not know how to write the code to be able to reverse the string to be able to display the password backwards.
Option Explicit On
Option Strict On
Option Infer Off
Public Class frmMain
[code]....
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Dec 20, 2010
I have converted the fare field in gridview1 to display fare | seats in same cell as displayed below...
i want when user select/ click on Book button row then the fare amount will be diplayed in textbox1 and seats will displayed in Textbox2
Protected Sub GridView1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles GridView1.SelectedIndexChanged
Textbox1.text=GridView1.SelectedRow.Cells(6).TextToString
End Sub
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Feb 11, 2009
i want to display text from textbox1 & textbox2 into a label when click on button. the code is
label1.text = textbox1.text & " " & textbox2.text
i using the "" for spacing. is there any other way for doing spacing?
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May 29, 2012
How to make TextBox2.Text displaythe same text if in TextBox1.Text i have, lets say "Test" on my first button click and "test" on my second. I want to make it do so without having to write the code again:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If TextBox1.Text = "Test" Then
TextBox2.Text = "Random Random Random"
Else
[code]....
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Jul 27, 2011
Here is an example of the .fil or CSV I am reading from. The numbers in this example are arbitrary and only serve as identification.
// A, B, C, D
000, 9.000, 9.000, 9.000, 9.000
0.000, 0.000, 0.000, 0.000
[code]....
I would like to display the values of 1.000 and 3.000 in Textbox1 and TextBox2.Next, I would like to multiply the values 1.000 and 3.000 with variables Y and Z to give products J and K.I would then like to display values J and K in TextBox3 and TextBox4.Finally, I would like to take the CSV file and replace 1.000 and 3.000 with values J and K, respectively, and save.
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Sep 16, 2011
How can I get the sum all the values a user enters into TextBox1 to display that sum into TextBox2.The user is going to enter one value one by one. The user enters '1' into TextBox1, therefore, TextBox2 should display '1'.If the user than enters '2' into TextBox1, TextBox2 should display '3'.If the user enters '2' into TextBox1, TextBox2 should display '5'.And so on.TextBox2 should only display one value at a time, not one after another.I am using double because I need decimal places.I have a ListBox1 where it displays all the values entered by the user in rows one by one, but I prefer not to use the ListBox1 to get the sum of all the values entered in TextBox1 and to have TextBox2 show that sum. Because in that ListBox1, I have few other things in there, like Strings, which will not allow the sum of all the values entered in TextBox1 to be calculated and displayed in TextBox2.Not sure if this matters or not, but I thought it might.So only need TextBox2 to have all the values entered in TextBox1.If 1 was entered in TextBox1, TextBox2 shows 1.Then 2 is entered in TextBox1, TextBox2 will show 3.
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Jan 26, 2011
how to display result in gridview according to textbox only if textbox2 date value is greater than textbox1 ?i have two textboxes and gridview ... if i type in Textbox1 : 2-Jan-2011 and in textbox2 : 1-Jan-2011 then in label1 the eroor message display else ..if textbox2 value is greater then textbox1 value then gridview will display records according to textbox1 and textbox2 from database
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Dec 21, 2009
I use following codes to diplay data in combobox
str = "SELECT sno,name,city FROM employees"
cmd = New SqlClient.SqlCommand(str, con)
[CODE]..............
With ComboBox1
.DataSource = dt
[CODE].......
Table has three fields as sno,name,city Combobox displays name column and data in table is as
sno--name-----city
1-------a------london
2-------b------moscow
3-------c-------tehran
Supose combobox text=a then I want to display following corresponding data in textbox1 and textbox2
textbox1.text=1
textbox2.text=london
(the first row of data)
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Apr 9, 2012
I have a filter that is used to populate a grid view and the url will conain: /example/grid?value1=1&value2=2
It will then have a link to page 2, which allows them to edit something.I then want them to click a link that will send them back to the gridview under the same parameters of: /example/grid?value1=1&value2=2
Is this possible? How do I hold on and fill in the URL values so it knows how to refill the grid view accordingly?
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Mar 16, 2010
onbutton click, I want to convert a string from textbox1 to textbox2 but assign values to each character.
i want to assign an alphabet character, to another alphabet character or number.
for example textbox1 - "visual basic" to textbox2 "abcabc abcab"
example if "v" then "a"
if textbox1 "b" then textbox2"c"
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Jan 31, 2009
How can I make a program so you click a button and select a File using a OpenFileDialog and click send on your computer and it will send the file to a different computer and then a SaveFileDialog will show asking where to save the file on the other computer. Oh ya I cant use WinSock or whatever becuase im using Windows Vista 64 Bit. I need it because I for some reason cant use printer sharing. It might be because im on A 64bit Vista Machine and I want to print a file off of a 32bit XP Home Machine.
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Oct 10, 2009
I am running a socket client and need to write some blocking code much like the "Serialport.ReadLine" code which blocks for X amount of time before either throwing a time out exception or returning the string revived. I need to do the same thing with the client socket, basically bloxcking until a CRLF has been detected or a time out has occurred. What is the best way of doing this?
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Apr 23, 2012
I'm trying to make an application that can read a 12 byte hex string from the serial port and display it into a text box, the source is a RFID module that is connected to my USB port using a RS232-USB converter.My first problem was accessing the text box in the datarecieved event due to invalid cross-threaded operation. Upon googling that, I copy/pasted the code I needed to get it work, these are all the cross threading functions.The OpenPort function and Datarecieved event are my own code, the rest I got off google. The application then worked, but I would get an incomplete code, the first swipe I would get all 12 digits, and at every other swipe, the first byte would vanish. Upon some more reading, I decided to make an array, the size of the incoming data (shown in the code below), but now I get the cross-threading error again.I know there's something wrong with the way I'm using the array. This is way beyond my VB knowledge, and I'm in o I'm an electronics engineer and self taught myself a little programming to create some apps for my hardware.Updated code:
Public Class Form3
Dim msg As String
Private Sub Form3_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
[code]....
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Apr 11, 2012
i have a DGV and 2 TextBox (the first one is for user input and the second is for displaying "Contact Person") in my Form. DGV DataSource is from database, i bind it programmatic with DataTable, the data is binding well, perfect, but when i use event Selectionchanged for DGV to display "Contact Person" in TextBox2 BASED USER SELECTION in DGV, it become error : "The Connection is already open" here is my code to bind data to DGV :
[Code]....
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Aug 13, 2010
I am writing a small app that is retrieving data from a device connected to a virtual com-port. I connect without problems to the device using the settings 9600-8-N-1.
I need to send the command <esc>MS , the device then sends back the data to a computer. I have tried this using Hyperterminal with success. I also did this with Excel and VBA. I used the MSComm32 Active X control:
MSComm1.Output = Chr$(27) + "M" + "S" + Chr$(13)
Msgbox(MSComm1.Input)
This made the data from the device pop up in a messagebox. I am writing a winforms app in vb.net, using VS2005. I have a form, on which I have a Placed a SerialPort control, named sp. My sample code is as follows:
Private Sub Form1_Load(ByVal
sender As System.Object,
ByVal e
[CODE]...
This returns the error message "Error: expecting a command". I have done som tests in HyperTerminal, and have concluded with:
-If I dont send <esc>, I get error "Expecting a command"
-If I send wrong command (ie MD instead of MS) i get error "Bad command"
Based on this, I suspect that I don't pass the escape character correctly to my device. So I wonder how to do this?
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Nov 22, 2010
I have got the following code for if in textbox1 the would be appear as 10:10:00 AM and in textbox2 the time will appear as in 4 hours time slots automatically as 06:10:01 AM ..if the textbox2 time will be 06:10:01 AM then MSg box will appear that "You can not registered to this site because the 4 hours time slot will be over " [code]Remember in textbox1 the time would be any .....and textbox2 will auto generate time according to textbox1 to maintain 4 hours time slots between textbox1 and textbox2
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May 8, 2009
I mean the same thing what the most websites have *CONTACT US FORM* that send your name, text that you have write to a e-mail. How i do this with Microsoft Visual Basic 2008 Express Edition
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Jun 19, 2009
I'm working on it for a couple of days but I couldn't get any success.. I'm trying to access Calc's edit box and trying to write something there but I couldn't do it =( what's wrong with my codes?
[Code]...
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