Ok, so, as you know [or not], I've been working on a custom file format,I have a basis code down. I've modified it to something a little different.The problem is not in the saving, which works just fine. It's the loading.Here's the ENTIRE
vb.net
Imports System.IO
Imports System.Text.Encoding
[code]....
What exactly does this line do?
i = stream.Read(bytes, 0, bytes.Length)
Does it read the entire message string sent by the client? I have a line to write to the stream later in the code and that does not seem to be sending anything back to the client, although the code around is excuting.
i = stream.Read(bytes, 0, bytes.Length)
While (i <> 0)
Try
' Translate data bytes to a ASCII string.
[code].....
I want it to do is that you input a string, then you select an algorithm (Theres only going to be one RijnDael) then you input a key, then the Initialization Vector comes from "txtIV.text" then you select the key bytes and the block bytes from the numeric up/down, then you either encrypt or decrypt.
View 1 RepliesOk i am having some issues designing a base-class to handle generics.Caveat is i need to restrict the type put in as a Numeric type, specifically Int16, Int32, or Int64 (Short or Long).I know you can do Of T as {Structure} but i dont want to select the key bytes and the block bytes from the numeric up/down.
View 2 RepliesI keep getting a ProtocolViolationException "Bytes to be written to the stream exceed the Content-Length bytes size specified." on the following code.I've tried setting Content-Length numerous ways with no success.
Dim url = "https://domain.com"
Dim req As WebRequest = WebRequest.Create(url)
req.Method = "POST"
req.ContentType = "application/xml"
[Code]...
I created a text file contains 4 bytes of data
AABBCCDD
I just want to read the first 2 bytes (AABB) to execute it with my program.
Then I'll need to read the last 2 bytes (CCDD) for another computer routines
Probably missing something silly here, Her eis what my display looks like Sending image...(401303) I would prefer it displays as Sending image...(391 kb)
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This is how i convert Bytes to KB etc.. vb.net
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I have a rom file that I want to display data from The strings I have already retrieved and displayed the problem now is the image. I have read all the bytes for the part of the file that contains all the data I require EN_Title_Icon which is 2112 bytes. The image data is offset 32 byes in EN_Title_Icon and is 512 bytes, How do I loop the bytes and put them as pixels in the picturebox or a bitmap? And can i use the pallet data that is the 32 bytes after the image data? Here is some info on the image
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I have some questions about arrays.
1) Lets say I open a file in a byte array and I need to add 5 bytes of data at the beginning. How would I go in doing that? ex: attaching to arrays together.
2) How would I go in adding 1 byte of data in a bye array?
All i need to do is open part of a file in bytes. Add a letter and 2 numbers to it at the begging and a number at the end.All i need to know is how to attach 2 byte arrays together and how can u add a byte of data to an array.
I want to open a file and to replace from 2MB to 3MB of it with another 1MB file. Is it possible?
View 5 RepliesWhy does this programmer use a binary reader to read bytes, why not the client.getstream.read or streamreader?
Case RequestTags.Connect
'sent from server to client informing client that a successful
'connection negotiation has been made and the connection now exists.
[code]....
im trying to format my results from some WMI quires but im not having much luck.
i want to display my available memory as Mb's not Bytes. in the past ve done the following
vb
result = (queryObj("TotalPhysicalMemory")) / 1024
usually that works but its giving me a retarded result, its giving me 3581.98828125 as the result, but i do the same way with my video card memory and it displays it as 512 like it should. ive tried every way i know of formatting and decimals but non of it is working.
im dsplaying my result in a text box and ive also tried formatting it thier with no such luck
Me.txtmemorycap.Text = text
i'm trying to convert an image into bytes in vb.net but i failed, i searched the web and threads over here, but seems that i couldn't find any working example or code.
View 7 RepliesI am not so good with buffers and arrays and I dont know how to continue from here:
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My intention is to open an image file as bytes, Convert the bytes to a string, send bytes to server and server stores bytes in a database. Then I need to reverse the process and be able to convert the bytes to an image.
I'm trying to read 5 bytes from a file and then do something according to what has been read. This is my code (I'll explain in a bit what's wrong):[code...]
It reads the 5 bytes I added to the encrypted file, but I want the CryptoStream to start from the sixth value and then copy the original bytes into the decrypted file, but it gives me an error:
Padding is invalid and cannot be removed.That's why I'm trying to make it read from the sixth value and then continue copying normally, but I'm stuck.
I just wanted to confirm my reading -- this is the number of bytes that is put in the buffer before the data received event is triggered, correct? And it's ONLY for that purpose?
View 1 RepliesI need to move bytes in byte array.
Dim data() As Byte = {&HE4, &H96, &HA3, &H47, &H42, &H4A, &H80, &H90}
I need to make so that the first two bytes would be deleted and the rest moved to the first one's for example:
Delete: E4, 96
Move: A3 and all the rest to the place where E4 was. (|A3 = 0|,|47 = 1| etc.)
In C++ it's possible to do it like that:
unsigned char data[]={0xE4, 0x96, 0xA3, 0x47, 0x42, 0x4A, 0x80, 0x90};
data+=2;
how to do this in VB.Net without making a new byte array and then using a loop to put the all bytes in that place - it would be too long and would use more resources.
I've just switched my code over that downloads data as bytes to use a WebClient. I add a header saying I will accept GZip and the site I'm downloading from sends me the data compressed. The problem is, how can I check to make sure it is compressed data before attempting to decompress it? It was much simpler when I was using a Web Request to check the response headers, but I'm having a little trouble checking the reponse headers with a WebClient. Does anybody out there accept compression with a WebClient?
View 1 RepliesI am sending a POST request to an API server and I have reused code where I have successfully done this before on other servers and for some reason, which I cannot figure out why, it's not working. I get the error:
Cannot close stream until all bytes are written."}
even though I declared the content length correctly and I am not sure what I am missing here...
data = data + "</posts>"
Dim postBytes As [Byte]() = Encoding.UTF8.GetBytes(data)
Thread.Sleep(10000)
[Code].....
I am currently writing a VB.net app to control an Integra AV receiver. I have success controlling it via Serial, but it also has a network port for TCP control. I can control it using CommandFusion iPhone app but am now wanting to create a windows app to control it. I have created client/server software that I use to talk from one PC to the which works well. So I am going to use the same client software to talk to the AV receiver. I can connect fine to it, I just haven't quite got the protocol right to actually control it.
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I have 10 parts of a file. Each part is 10,000 bytes.Now say I receive these parts out of order meaning I cannot simply just write them in order as I receive them, but I am able to detect what part it is.
If I received part 3 how would I write those bytes in the 20,000-30,000 byte section of a file?
Well i am coding a Application and it is almost done i just need to finish the Download part. Listing Files and so on is all done but now i need to Download the File which i know how to do but i dont know how i can read the Bytes got and how much is left. It is Downloading from a FTP.
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In my serial port application, I have my code -
Private Sub SerialPort_DataReceived(ByVal sender As System.Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort.DataReceived
Dim cnt2 As Byte
[code]....
For some packets I sent, "Error Data Received" came up. I checked BytesReceived, it was 0. My question is: since SerialPort_DataReceived processes data received, data was supposed to be received. Why the number of bytes I read was zero? BTW, when is this event accessed? it is accessed when any number of bytes received or the whole packet received?
after that, I try to add crystal report 2008 component to VB.net .By right click on toolbox choose items and checked crystal report viewerIt doesn't seem works, there is no crystal report 2008 component on toolbox
View 17 RepliesI have a string of bytes which I am reading from a microcontroller via a serial port which is as follows : 02 10 18 14 CB 73 43 D3 14 00 0D 00 09 00 1B 00 04 B8 3C 00 00 24 00 30 AB
I would like to write some code to place each the bytes into an array with each element of the array consisting of one byte each.
Dim length As Integer
Dim intOffset As Integer
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim clsRequest As System.Net.FtpWebRequest = _
[code]....
What I'm trying to do is get the bytes already uploaded. I cannot seem to do this.Another problem: When uploading, the form will not move or change Label1.text. When pbUpload.value == 100, THEN it changes to a different number than label3.text.
I am getting the missing operator error with this, could you help.
Dim s As String
If ListBox1.SelectedIndex >= 0 Then
s = " WHERE SalesRep = '" & ListBox1.SelectedItem.ToString & "'"
End If
If ListBox2.SelectedIndex >= 0 Then
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OK I need to end up with a byte array that is 12 bytes long, because I need to send it via UDP to a server that expects it in that format.
These 12 bytes are a combination of single bit flag fields, 16 bit integer fields and some 3 and 4 bit integer fields.
So I have defined a class that has a property for each of these 'fields' but I'm having a little trouble getting my head around how I can set individual bytes based on 16 bit Integers that are passed in to these properties.
For example, lets say I want to set one of these 16 bit fields to a value of 300. I would set the relevant property in my class to a UInt16 with a value of 300. The problem is converting that UInt16 to 2 separate bytes to assign them to the array because as far as I know there is no way to assign the value of 2 bytes in the array at the same time (obviously a UInt16 is 2 bytes long).
I am trying to format xml entries I have so that I can use the xmltextreader without getting errors. I added a default header and footer in the event I notice there is no opening or closing tags. I remove illegal characters and check for unicode but I always find an issue where an entry slips in and gives the error: data at the root level is invalid and when I check that entry is slipped through the cleaning process or just has an unmatched tag somewhere.
Now I use
Dim stringSplitter() As String = {"</entry>"}
' split the file content based on the closing entry tag
sampleResults = _html.Split(stringSplitter, StringSplitOptions.RemoveEmptyEntries)
To split my xml into individual entries before I start the cleanup process.
Here are my default headers:
Private defaultheader = "xmlns=""[URL]"""
Private headerl As String = "<?xml version=""1.0"" encoding=""utf-8""?>" & vbNewLine & "<entry " & defaultNameSpace & ">"
Private footer As String = "</entry>"
Is there any tool in the .net framework that can detect and cleanup unmatched tags so that I can get this to work.