I have a barcode scanner which sends data to USB Port. I want to redirect it into ComPort. So that I can manipulate it. How can I do It in Visual Basic 2008 Or how to convert usb port to ComPort in Visual basic 2008
I have two issues I am trying to correct...First am trying to get my listbox1 to be the selected Comport used to do the send data and get data back.
My second issue is its requiring me to send two times to get my read data back as complete data and has odd shapes with the data I get back in front of and after the regular txt.
Beware, I am very new at this so please take it easy on me... Most help I did find was for older versions I only have the 2010 Visual studio Professional...
I have a program which will read data from comport when ever there is data on comport. I am using Comport.DataReceived event to do that.My program will receive data very frequently and it is working fine. The problem is, it will work for 3 to 4 days fine but after that my receive data will slow down. I am receiving data with high delay (about 10-15 min).There will be continuous data to my comport.
I want to send a image file from server to client?i am using this code for sending but i can't send the image....... and i also need some receiving code.
1.Public Sub SendImage(ByVal sndImg As String) 2.Try 3.Dim ns As System.Net.Sockets.NetworkStream 4.Dim client As System.Net.Sockets.TcpClient
I'm writing a Cleint/Host program that sends a image over tcp (from printscreen, not a file) to the host. Everything seems to work fine and the image is transmitted and displayed in a picturebox plus saved to a folder. The problem is when the printscreen is bigger than 176040 B. First the limit was 128000B but after setting the sendbuffersize and recivebuffersize to 1000kb the limit is 176040 B. Could it be a limit in the tcp protocol?
Here's the client code
Code:Imports System.NetImports System.Net.SocketsImports System.IOImports System.DrawingImports System.Drawing.Imaging Public Class capture
im currently working on a program which prints serial text to an aplication like note pad. the problem im having is that i cant figure out how to change which serial comport is being used in code. i want the user to chose the comport with a check box.keep in mind that COM1 in my code is what i called my check box. here is my curent code:
Public Class Form1 Private Sub OpenFileDialog1_FileOk(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles OpenFileDialog1.FileOk Shell(OpenFileDialog1.FileName, 1)
I have a USB gadget that appears to Windows as a USB serial port, there is no special driver.I know the USB Vendor ID, and the USB Product ID, I need 1 or 2 functions:
I am having trouble sending data to a comport..... I am a noob at this and have been doing my head in... I have done a fair bit to a few programs that I have on the go, but am stuck at sending some data to the comport...
I have in form1 put the serial port contol and added SerialPort1.Open() to that. I have then added 3 buttons that I was to use to send data to the port... Since this is for a radio scanner the buttons turn the backlight on / dim and off.....
LTN is used to turn the light on and works fine in hyperterminal.. I have got the port settings right in vs2008 but the code is wrong.
I have:
code:
Then I get warning of Name 'LTN' is not declared...
Im connecting a infrared transmitter by serial port, Rs232 to my pc. Anyone know the coding for the comport to detect the signal and auto trigger a sms event(by gsm modem) ??????
I'm trying to communicate through a serial port with separate subroutines for establishing the connection to the device and handling routine messages. I'm able to establish the connection, but reference to the COMPort in another subroutine fails with a message that the port is closed. I can successfully communicate using COMPort.Write commands within the connection subroutine, so I know that works. How do I pass a reference for the comport to other subroutines?
I am writing a VB.Net application wherein I would like to be able to communicate with it from a remote computer. Specifically, I would like to be able to send (from a remote computer) both text data and also images (jpg, png, etc.) and then have the application use the sent information by displaying it to the user. How would I code the VB.Net app to be able to handle incoming data like this?
If possible I'd like to not be dependent on .Net technology on the "sending" side so I'm not sure if I would just use sockets or a web service or what.
I was wondering if there is an easy and fast way to send an image (or files in general) which is small, as in around 30KB, over the network using VB .NET. the most i was able to do at one point is to read the image (or file) as text, then send each character over the network, but it took way too much time for the file to get sent, and then translated from text to file once again on the other side. I don't know much about network programming, because i just started learning about the subject.
I have two programs running, a client and a server. They are connected through a socket, and a TCPListener. The server is pure VB.NET, but the server needs to take pictures of the desktop, which works, but then needs to send it to the client application.
Im trying to send an image from the server to the client by using network stream. I have looked on google and found out that you can use memory stream and send it, but how do I use memory stream to get the image from the stream and display it on a picture box on the client side?
I need to send and receive a large image between programs running on different machines within the same network.
I've looked at using upd however ran into problems with the size of the packets and (after breaking the image into smaller pieces to get past this problem) the number of packets needing to be processed all at once - and ultimately packet loss.
I've also thought of sending the image by storing it in a common file folder and receiving it by using file watcher as a trigger. However, this just adds further complexities in setup where common folders don't already exist.
Assuming I'm barking up the right tree looking at tcp, can someone point me to/provide an example of how to send an image file using it (vb.net would be ideal). Also, are there practical limits to tcp package sizes?
I'm currently patching an asp.net program where I need to be able to send an image to an SQL Server 2005 DB. It works fine when I use the asp:fileupload control, but the trick is that when the user deletes the image, I'm supposed to replace it with an image from the server saying "empty", in code-behind. I know how to open, use and save text files in vb, but I can't find any information anywhere on how to open an image / binary file in a similar manner so that I can use it as an sql-parameter on the update query. Below is an example of how easy it is to use a file from the fileupload control.
I want to send image from server to client via .net Sockets and assign it to a picturebox. but I got problem in receiving data, it's 'Server' side code:
I'm trying to send an image to Imgur's server.Everything went fine and I'm getting the URL of the image from the parser but when I'm trying to open it on the web browser, I'm not getting the image... only a "broken image" icon.I think it's a problem in the convertion to the byte array.... but I don't get it.
Dim image As Image = image.FromFile(OpenFile.FileName) Dim ms As New MemoryStream() ' Convert Image to byte[] image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg)
Although im using this simple logic the image that is being displayed on the remote machine the one that i send is not the same as you can see. In fact 90% is missing! The Image Size is 256KB JPG
I am testing an server-client application which captures a desktop's screenshot, saves it on a directory and then sends it to the server. But i am facing a problem. It sends me 0 bytes :S. Here is the client's
Dim i As Integer Dim ReadData(2047) As Byte Dim ReadLength As Long
I convert a SVG to canvas using canvg to an image and then vb.net client side I convert the image to bytearray() and saved it to a folder on my server so I can attached by email :
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click Dim path = Server.MapPath("PDFs") Dim fileNameWithPath As String = path + DateTime.Now.ToString().Replace("/", "-").Replace(" ", "-").Replace(":", "") + ".jpeg" Dim fs As FileStream = New FileStream(fileNameWithPath, FileMode.Create) Dim bw As BinaryWriter = New BinaryWriter(fs) [Code] .....
This code works fine and it send the image. Actually I don't need to save this image to my server I just wanted to send it without saving, this is what I have done so far. Protected Sub emailSend_Click(ByVal sender As Object, ByVal e As EventArgs) Handles emailSend.Click Dim customerChoice As String = DropDownList1.Text Select Case customerChoice Case "pdf" [Code] .....
Im making image uploader that connects to my ftp and send them in to public_html.This is the
Public Class upload Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Dim request As System.Net.FtpWebRequest = DirectCast(System.Net.WebRequest.Create("ftp://ftp.my.details.com/public_html/photos/"), System.Net.FtpWebRequest)
I'm implementing a client server from Atheist's thread about the TCP connection. I have set up a host that stores all the user details and when the user connects to the host, the specific user details will be sent to the client. One of the details include an avatar image. Since the example is sending data via text, how do I send an image from the host to the client and vise versa?
