Swap Bytes - (Byte Ordering In Binary Files MSB-First Vs LSB-First)
May 18, 2010
I need to read a binary file. The Byte-Ordering in this file is different from the Intel-Standard. In good old FORTRAN I've used Equivalence-Statement in such cases (For example Defining a 4-Byte-Integer-variable and 4 Bytes at the same memory location / read the file as bytes / store them in the neccessary order / access the memory using the Integer-Variable). In VB dotnet I programmed a solution using shift-operators:
[Code]...
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Dec 18, 2010
I create my algorthm and its finished but there is a problem, it encrypte all text and all text in a file but after decryption when i open my file (a video file)the player show all information about file(duration,size and ect) currectly but it dont play that my program encrypt and decrypt byte by byte and place a asci code in bytes(0 to 255)
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May 1, 2009
i have a table in sql server with some fields set as Byte() (System.Byte[]) when i import them in my application to be used with linq they are converted in Binary (System.Data.Linq.Binary)why is that?is there a way to prevent this wrong translaton???if i update the database how can i update the classes that has been craeted in visual studio2008?
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Jan 2, 2010
I have a byte array and I need to get 4 bytes from it at a certain location(16) but I don't want to convert it to a integer or anything just keep it as 4 bytes to store in a variable.
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Jan 2, 2010
I have a byte array containing bytes from a file(see my last questionnow I want to get the second lot of 4 bytes from the array and convert them to an integersomething like bytearray.get(4[start],4[length])
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Mar 13, 2011
I want to replace some bytes from a binary file .[code]...
If the value of the textbox is too short I want to replace the remaining bytes for a new value "0"
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Sep 22, 2011
I have a long byte array.I need to eliminate the initial 16 bytes. Is there a shortcut do it?
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Jun 27, 2011
I have a function that returns a byte(), the only problem is that the array most times is to long and has 4 or 5 excess null bytes. I want to remove them and tried everything, but I cant seem to find anything that works.
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May 8, 2011
I need to basically search for either a string such as "I-AM-RIGHT-OVER-HERE" or search for a sequence of bytes and return the offset of where that string or byte sequence is at.
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Jun 7, 2011
The question is quite simple for all of you . I have a binary file . A description for this file says that
[Code]...
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Feb 10, 2011
The relevant code below is not achieving what I hoped it would. I intend for
1. SerialPortBufferTemp to be used as the container for each Serial Port Read.
2. _buffer should contain the resultant array from two separate Reads, the second appended directly after the first.
(E.g. 60 bytes read on the 2nd Read will be appended to the 168 bytes received on the first Read (228 total resultant byte length))
The problem with my code below is that _buffer has increase in size from 300 bytes to 600 bytes, skipped bytes 168 to 300 (leaving them all zeros) and added the remaining 60 bytes from the second read beginning at _buffer[300].
private List<byte> _buffer = new List<byte>();
byte[] SerialPortBufferTemp = new byte[300];
serialPort1.Read(SerialPortBufferTemp, 0, iBytesRead);
if (iValidRecordCtr == 0) {
_buffer.Clear();
[Code] .....
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Jan 15, 2011
How can I efficiently find the location of the first instance of a four byte sequence within a byte array? Is there something more efficient than looping through the whole array, or a built-in method?
I'm searching through a byte array for a pair of CrLF. I can't convert it to string for an InStr first because I need the position of it in the original byte array.
I am trying to figure out the location of this, as it delimits between a string portion and a binary portion, similar (well, exactly like for this part of it) to an HTTP header. There is a string portion, and two CrLf before the content begins.
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Nov 16, 2011
I'm new to the Vb.net. To display the list of files in the given folder, need to processing the files one by one based on the user given the order/arrangement in form based interface.
How can do this in vb.net 2005 or any suggestion.?
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May 25, 2009
Is there a way to convert byte values to binary so i can read the values from the bits themselves? I have some byte whose values are 00 09 and I'd like to convert the values to bits to be like this : 0000 0000 0000 1001. Then I'd like to read the value of first 2 bits and the remaining 14 bits separately.
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Mar 7, 2010
Some binary files have application variables at the end if you open it with a text editor you can see these variables. Now when I read these files into the processor memory the program does not work properly, however if I read a file without this it works fine. So how can I read a byte[] array to EOF so that when I pass that byte array into win32 api create-process it will create the process without corrupting the program?
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Aug 24, 2009
I'm trying to save binary data ( convert from image) to byte array in mifare card with acr 120 reader.
image : 687 byte
mifare : 1 k
My problem its can't save but I am trying to save char data its work.
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Mar 14, 2012
I have a language that generally contains serialised data messages in a human-readable format, but some productions within the language contain verbatim raw, binary data.My parser uses String for its buffer since that seems to be the easiest thing to work with. However the data is read from a network socket into an array of Byte.
Now, I'm trying to connect the dots between Byte() and String:
[Code]...
But my data is still mangled. I haven't actually been able to deduce yet precisely how the data is being mangled, but I do know that the length of the data is changing, indicating that the bytes are not being left verbatim.
So how can I obtain a String whose contents are just a verbatim copy of the bytes from my Bytes() input?
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Jul 3, 2009
Im working on a FTP Server (File Transfer Protocol) where i can download files.The problem occoured when i was about to download a 4BG large file from the server when i only had 3GB RAM on the server computer and the function to read the binary files was " data = File. ReadAllBytes("Files File001.7z") "... so how do i split the binary file into smaller byte blocks like 1MB?I've been trying this which seems to have been a total failure.[code]
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Jan 16, 2010
I have a device with upon serial communication , it send the data as HEX values , (eg, C020042ABD0F91A103E400F929EBC) . I use the following code to get data from the serial port.
Dim fStream As New FileStream(sFileName, FileMode.CreateNew) ' creates new file
Dim bw As New BinaryWriter(fStream)
System.Threading.Thread.Sleep(1500)
ComTd.Read(data, 1, bCount)
[code]....
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Jun 5, 2011
I have a device with upon serial communication, it send the data as HEX values, (e.g., C020042ABD0F91A103E400F929EBC). I use the following code to get data from the serial port.
Dim fStream As New FileStream(sFileName, FileMode.CreateNew) ' creates new file
Dim bw As New BinaryWriter(fStream)
System.Threading.Thread.Sleep(1500)
ComTd.Read(data, 1, bCount)
Dim bCount As Integer = 4119 ' it is the size of the chunk not block size
Dim data(bCount) As Byte
[Code] .....
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Dec 18, 2011
I must search a binary string for a pattern. This worked fine in VB6 using Get to read a file into a string and using InStr to search for the pattern. The conversion from VB6 to VB.NET changed Get to FileGet and warned of new behavior, but I don't see anything in the FileGet documentation about not being able to read 0 value bytes.
I don't mind at all changing to a new method, but ultimately I must get the data into a string rather than an array.
[Code]...
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Jun 22, 2012
I'm trying to read the binary data from a binary file with the code below but the it's return the value in the byte array. How can i read the binary data from the binary file and then convert the data into string?This is how i create the binary file.
Dim fs As New FileStream(Application.StartupPath & "Agency.dat", FileMode.OpenOrCreate)
Dim bf As New BinaryFormatter()
Call bf.Serialize(fs, GAgency)[code]....
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Sep 30, 2010
I realize the code listed below, whose serial port using string formatting which I inherited is complicated. It formats a Date obtained from a DatePicker control into a "yyyy-MM-dd HH:mm:ss" string format to send to a hardware device to be stored via Serial Port retrieves the date from the device and displays to user What I'm trying to do is port the code for use in a Socket rather than Serial Port which wants a Byte Arrray of the same Date Time string variable. I can't figure out how to encode and convert to Bytes the string value used in the Serial Port version. The evolution of the process is listed from top to bottom.
[Code]...
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Dec 4, 2009
I can download files from a website, and i am using:
Try
My.Computer.Network.DownloadFile(Download Path, Destination Path, "", "", False, 60 * 1000, True, FileIO.UICancelOption.DoNothing)[code]....
And, when i do try downloading some files, they come as empty.They do download, and the folder has the succeeded files, and some files are empty..Is there a way to check if that folder has 0 byte files, and if it does, delete the files that are 0 bytes, OR delete the folder if whole folder is 0 byte..
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Jan 29, 2010
I use this function to convert file to bytes array:
Public Function ConvertToBytes(ByVal path As String) As Byte()
Dim _tempByte() As Byte = Nothing
If String.IsNullOrEmpty(path) = True Then
Throw New ArgumentNullException("File not exist", path )
Return Nothing
End If
[Code]...
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Oct 4, 2011
I need to do some operations that require converting array of bytes to string and the other way. After struggling with it for a few hours I found out the core of my problems. Look at this piece of [code]...
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Mar 23, 2009
I have a DEM file(Digital Elevattion Model File) and I am trying to open the file,where we have Latitude and Longitude values inside the DEM file.And, Now I have opened the file using Filestream and Read the file using BinaryReader.But, I am having a trobule in getting the values of Latitude and Longitude.I am getting Byte values randomly as 1,202,31,271 etc.But, we dont have latitude and longitude values more than 180,and also I am not getting 16 bit UInt values.For example, the values should be like Latitude 20.00416666666667 and Longitude 39.99583333333333.So,read the correct Byte values of the DEM file.The code I have used till now is:
Dim fs As FileStream = New FileStream("C:UsersadminDesktopHeader and DEM fileE020N40.DEM", FileMode.Open, FileAccess.Read)
Dim rd As New BinaryReader(fs)
Dim convertDB As UInt16
For i = 0 To rd.BaseStream.Length
[code]....
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May 23, 2010
I've been trying to figure this out for hours now, and I've given up on trying to solve it myself. Basically what I need to do, is convert a "double octet" binary string, such as "11010011 01011101", into a byte or char type if possible.I use the following code to convert my Unicode text into binary:
Private Function ByteToStr(ByVal bt() As Byte) As String
Dim st As New StringBuilder
For Each byt As Byte In bt
[code]....
But that gives me weird results. The "Convert.FromBase64String" obviously isn't what I'm after. Any help would be great. If I can convert the "binary string" into a bytes or chars I can get it into a string.
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May 23, 2010
I've been trying to figure this out for hours now, and I've given up on trying to solve it myself. Basically what I need to do, is convert a "double octet" binary string, such as "11010011 01011101", into a byte or char type if possible. I use the following code to convert my Unicode text into binary:
[Code]...
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Aug 8, 2009
I'm concatenating data files, but the problem is that I'm seeing some extra bytes where the files are joined. The new file has extra bytes. I had thought this was maybe a problem with encoding.Here are the methods that I've tried to use to concatenate the files. The first example I'm getting extra 0xA0 0x00 bytes.
Dim inputfiles() As String = Directory.GetFiles(sourcedir, pattern)
Dim bufSize As Integer = 1024 * 64
Dim buf As Byte() = New Byte(bufSize) {}
[code].....
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