i would like to know how to read the USB data through VB. so far my project is like this, DAQ using PIC18F4550 and the data will interface with PC. In PIC part, i make it sending data in every second as ideal. i would like to use VB to collect the data and view the data in graph form. 2 type data will be collected. 1st data will be voltage versus time (analog data). 2nd data will be time using versus n-times (digital data).
View 5 RepliesI;m attempting to write code to read several NMEA ports and format the data for archive. When I execute the following code:
Using Commportno As IO.Ports.SerialPort = _
My.Computer.Ports.OpenSerialPort(portName:=port)
Dim Incoming As String = Commportno.ReadLine()
Im working on a HSD 32 bit data bus to serial converter via a microcontroller. Now first I want to make a sort of data sniffer to read the data bus (32Bit) .All on the controller side is working and the stream of bytes are coming in via RS232 as 4 bytes in HEX like FD,A5,45,8B . I already converted the bytes in Dec and ASCII to determine what is passed true the bus and how fast and stuff.. Now that is all correct and working very well if the LSB (least significant bit) of the 32 data bus is Data line 0 and the MSB (most significant bit) is Data line 31 but if that is not the case I need to invert the 32Bits (like as I would invert the connector on the bus) . How do I best do this using the 4 bytes I send from the micro controller.
Example:
(MSB) 01001000 01100101 01101100 01110000 (LSB)
HEX= 48 65 6C 70
DEC= 72,101,108,112
ASCII= H E L P
I need to invert it with a button to:
(MSB) 00001110 00110110 10100110 00010010 (LSB)
HEX= 0E 36 A6 12
DEC= 14,54,166,18
ASCII= (SO) 6 : (DC2)
I want to read data (read only) from excel files
I use this connection string
Con_BarCode = New ADODB.Connection
With Con_BarCode
.ConnectionString = "Driver={Microsoft Excel Driver (*.xls, *.xlsx, *.xlsm,
[Code].....
I have a fairly simple XML file that I just want to read the data from.
It has 3 levels, root, main section and items. There are no attributes. I want to go to the first main section by name, then read in all the items. The items all are named the same. I've seen this done before, so it should be ok. No writing will be done. Basically this is a static data file
File looks similar to the following:
CODE:
I'm only getting started with VB.Net, using VB Express 2008.Using the System.Data.SQLite wrapper, I need to read data off a SQLite database file, and chart data using basic bars, pies, lines, etc. Nothing fancy.
View 1 RepliesCODE:
That code works to read the entry data and to recognise the correct data, and the incorrect. However, even if entry is correct, the error msgbox will appear (x times of how many records there are in file), despite being navigated to the menu. Anyway that the Else isn't triggered when data is correct. Also for it to appear just one instead of (x times of how many records there are in file.)
i have a embedded device that send data through PC over USB communication.i want to accept those parameters and using those parameters plot a graph(for example plot a graph over "x-axis" and "y-axis".Can any help me how to create such aplication using visual basic.
View 5 RepliesIs it possible to have a Textbox on a form that when the user inputs data, ( during Runtime )that data remains in the Textbox for good and the Textbox then becomes read only ? Is it also possible to make it so that the CD with the programme on, is in the PC when the programme is being used. Perhaps writing the Textbox data back onto the CD ?
View 1 RepliesI have added a DataSet to connect with my SQLDatabase. Test Query displays correct values but when I programmatically try to display the value of a certain field using following code
dim vrName= dsTest.Tables(tblTest).rows(0).items(0)
I get Tables is not a member of dsTest.
how can I use dataset to read, write, edit and delete data as we use in WinForms?
i have two list boxes with words in them and i want to put then in a string of data..or a textbox either one. And also how can i move the listbox down aumaticaly on a timer?
View 4 RepliesHow To Read Data From The Cd Tray
View 3 RepliesIn My application I need to retrieve/Read data from USB port. Is it possible to Read data from USB cable?
View 3 Replieshow to read data from usb port in vb.net
View 1 RepliesI am working on a application where user enters his personal information (name, city...), so, should I, that is, should user save his data inside of the application, or should there be a data file where the information would be stored?
View 7 Repliesfriends i am able to get xml file by sing bytes, perhaps which is getting some problem, alternate method to do the same thing to save xml file.
Try
Dim strUrl As String = "http://xyz.com"
Dim wr As HttpWebRequest = CType(WebRequest.Create(strUrl), HttpWebRequest)
Dim ws As HttpWebResponse = CType(wr.GetResponse(), HttpWebResponse)
[Code].....
I want to be able to load & read (and later edit) .csv files into a textbox in Visual Basic 2008, If possible.
View 7 Repliesi want to read data from another run application by vb.net2008 project.i can read from this program by excel by typing in any cell " =MISTWS|SEGS38191C010C1!Dailyhighprice"
the program name MISTWS and with this comand i wants to read the value of daily high price to company code SEGS38191C010C1. i wants to read the same way but not in excel,i want to read it in vb project directly let vb project read data from MISTWS program direct.
I am running hlds server. I want to make server status page on my website and I thought that it could be easiest way to read data from "console" with some cool program.
Serverwindow looks like this: [URL]
how to read all that text from servers console and save it to .txt file so i can include and parse that .txt with php to my website?
I have some problem about read excel file in vb.net i want read data in excel. that excel file select from user local drive. so user browse to their local drive and read from that path. after that, bind data to datagrid.
View 5 RepliesI have a repetitive process requiring that I copy and paste data from text boxes in one program into another program for further processing. I'd like to automate this process using VB .NET. The application from which the data is gathered isn't mine, so I don't have ActiveX-like access to its controls.How would you write an application to gain access to a form from another application, to be able to find the controls on the form, and gather the values from them? Just experimenting, I've used the following code. This resulted in only the name of the form to which this code belongs. It didn't find the names of any other forms I have open, and I have a lot open to choose from.[code]
View 1 RepliesMy program connects via the rs232 port to a pump and it managed to start the communication and sending data. But the problem arises when i try to read the return signal from the pump to pc. This is the piece of code i've used:
Code: Dim returnbyte(0) As Byte Dim ByteIndex As Integer = 0
Do While ClassSerialPort.BytesToRead <> 0 ReDim Preserve returnbyte(ByteIndex) returnbyte(ByteIndex) = ClassSerialPort.ReadByte() ByteIndex = ByteIndex + 1 Loop
[code]....
I obtain the following results:
Code:... 6 12 0 0 0 92 ...
From the manual i understand which byte to read. For e.g 6 = ACK. The problem is how to interpret the 4 bytes together in a string for e.g 0 0 0 92 means 9.2ml ?Is there any way to read the decimal point?
how to read data from usb port in vb.net
View 2 RepliesWhen using the SerialPort component in VB.Net, and when the event DataReceived occurs, and if we assume that the com port read 13 digits (Bar Code), how to read the whole data received (i.e. 13 digits) while in event without letting the event repeats 13 times and write the 13 digits AFTER COLLECT THEM in a text box (I don' want to write one-by-one digit in the textbox, all at once)
briefly: I want to read the whole data from COM port at once and write the whole data (not digit-by-digit or byte-by-byte)to a textbox.
I know it is SERIAL port but I want to write the 13 digits PARALLEL to a textbox!
My first question has to do with the opening lines needed in a VB program in order to connect to Excel 2007 and read/write some data from/to it. I know the process only slightly and reading and writing to the cells is not my real concern for the moment. What I need to become familliar with are the lines like this:
CODE:
This is just one of the examples I have read through and to be honest I only follow this slightly. The trouble was that with each new article I read, people did this differently, not the variables on the left mind you, just that some left out lines, which I can see could be done based on circumstances. Still others said the Imports line was not needed....etc...and other loaded up at least 3 or four more Imports lines insisting all were needed.
I'm looking for some straight-forward advice on what is the minimum needed to access an existing Excel spreadhseet and to just read some of it's cells to variables in the code and then writed some data back to certain cells within the spreadsheet and then save and close it.
Also, please note that I am using VB 2010 Express. Why, because I'm a broke developer who spent most of last year out of work. I have a new contract assignment which is so far going well but will go even better if I can master this technique with VB.NET, not VBA. And all the docs I've read said that even though VB 2010 Express is a watered down version of VS, I should be able to do medium level tasks such as this with it.
I am working on a project that reads in data from a device. I am able to read in the constantly changing data only, i need to be able to read in the saved data that is in the device as well.
My question is if the data that is saved in a certain type and i only read try to read it in as text for example, will the saved data I am looking for not be displayed?
ex: im trying to read in text but my device has the data saved in hex, do i see anything or nothing?
idk if this helps or matters but the rs-232 connection is a null modem and im working with VB 2010
Im having problems with reading CVS file and getting data from it.
Im trying to make IP to country code which checks all from CVS file, its like this.
1.0.0.0,"1.0.0.255","16777216","16777471","AU","Australia"
1.0.1.0,"1.0.3.255","16777472","16778239","CN","China"
1.0.4.0,"1.0.7.255","16778240","16779263","AU","Australia"
[Code]....
Lets say that I have ip 1.0.2.114 to check, which is found beetween first line values of CVS, and its Australian IP, so is there way to read CVS file and if u put there ip 1.0.2.114 then msgbox shows "Australia"?
Way to Read Binary Data.I have the following [code]...
View 4 RepliesI've created a new ASP.NET Dynamic Data website and have used LINQ-to-SQL for the framework. I start up the application and it displays my tables fine and I can browse them - but it doesn't give me any create/update/delete abilities - all I can do is read? I didn't change anything from the defaults - what gives?
View 1 RepliesI have a device which send me data over a particular port. The data is in XML Format.
Now I already did a small console application which listen for the data and print out the data on the screen.
Now my plans are to deserialize the xml data or I will create the insert statement into the database.
1) The device send me the data every second (if there is data to send me).
2) I cannot say how much data the device is going to send me.
How can I make sure to capture all data without loose any information..