Open A File In A Hex Editor And Know That Each 2 Digits Is A Byte - Stored In Arrays ?
Dec 31, 2009
I can open a file in a hex editor and know that each 2 digits is a byte, they are 8 digits in binary correct?
How are they stored in arrays in VB.NET?
So if I have:
Dim xx() as byte =
What would I put after the equals? The hex digits from the hex editor? (This is just a program I'm not going to save, basically I don't want to open files to get etc. I want to put in the bytes in the code.)
View 4 Replies
ADVERTISEMENT
Apr 6, 2011
Objective: Combine byte arrays, read specific sections, and then cut byte array at specified point.
Private Sub DataArrival(ByRef aBot As xyzSocket, ByRef theData As Byte())
Dim RDLength As Int32
If aBot.ReceivedData Is Nothing Then[code]....
I'm not sure if I have this right to begin with because I can't test it without having it completed.
View 6 Replies
Sep 20, 2011
I have 2 byte arrays. I want to merge these two byte array into 1 byte array.Usually, I just create a new byte array with length = byte array #1 + byte array #2. Then copy byte array #1 and #2 to the new byte array.do I have more efficient way to merge 2 byte array using VB.NET and .Net 4?
View 2 Replies
Dec 8, 2010
I have a vbp file that I would like to open with a computer without vb. I don't need to run the file, but I would just like to look at the source code
View 2 Replies
Dec 19, 2009
i want to save String in File Who not Able to open in Text Editor Open it Only on my Application Suposly i want to save Phone Book Contact In this file
Three Text Boxes
1. Name
2. Phon Number
3. @mail Address
i already read these stuff but still not Understand i already check Kaymaf Provided link , but i m not understand Create Your Own Custom File Type
View 1 Replies
Feb 11, 2010
I had to develope a program that shows a list of names and age in text editor. I am able to open the file in text editor but not getting the names and ages when typing it in the text box and clicking my "write button" or the file menu write. Everything else seems to be working fine with the exception of getting my message box twice from the event load. I don't know if the below is enough for you to assist me but this is what I should see in the text editor:
[Code]...
View 2 Replies
Feb 13, 2010
For my database program, I need to open a text file and extract the numbers written there into arrays.
View 2 Replies
Aug 26, 2010
I need to know how to code a windows application program that will make it possible for customers to place orders online. Customers will have access to menu using a combobox,containing items available. The text file contains all menu items and the price of each item, as well as number of orders for each item. The file is created with a notepad containing 5 menu items.the first line contains the name of the item,second line contains the price and the third contains total number of orders which initially is 0. So far so good i know how to check if the file exists or not,and populating the the combobox, but ther's an instruction where i have ensure that the number of menu items does not exceed 100, and if so,should display an error message.and should validate to ensure that the total number of orders is>0,if not,re display the input box with a suitable message. Then on the save(menustrip),should write the whole textfile from arrays in memory,clear the combobox,display the message. Also has a process payment button where it should read through the arrays with a for next loop,then shouold write function called amount due,which recieves the total orders as a single data type,where the value for amount due is calculated as total orders*price.CAN SOMEONE PLEASE HELP ME OUT SINCE IM A BEGINNER IN VB2005.
View 1 Replies
Sep 6, 2007
I would like to place the code below in a click event for a button to open a word file. I have added the document (group2.doc) to the Application folder of the target machine in my setup project. how do I write a dynamic file path that will open the file?
[code]....
View 3 Replies
Aug 7, 2009
I'm trying to combine 2 byte arrays and then create a new byte array that contains the contents of both but running into a problem. The error says 'Source Array was not long enough.' I'm trying to combine HeaderByteArray and bytBuffer into newByteArray. I don't understand what Source Array is not long enough means and how to correct this.[code]...
View 9 Replies
Mar 9, 2009
I am trying to compare two long bytearrays in vb.net and have run into a snag. Comparing two 50 meg files takes almost two mins so I'm clearly doing something wrong. I'm on an x64 machine with tons of memory so there are no issues there. Here is the code that I'm using at the moment and would like to change.[code]...
View 5 Replies
Jun 8, 2011
I think there is Copy.to function but i cant find it
View 2 Replies
Jun 24, 2009
A project requires to allocate a varying number of byte arrays (buffers).
It would be ideal if the following definition would be possible:
Dim ArrayOfBuffers() as buffer(10000) as Byte
The byte arrays must be ordered sequentially because they have to be written to a file by efficient procedures destinationFile.Write(ArrayOfBuffer(3),1000,1000)
The number of buffers will change during program execution sometimes. Therefore it would be nice to be able to do a ReDim on the data structure when needed.
View 5 Replies
Oct 6, 2008
I am in need of encrypting a byte array, but my encryption method that I found strictly deals with strings.
Here are the two pieces of code that I am dealing with.:
The byte array (the bytes that need to be sent encrypted)
Code:
Dim outStream As Byte() = System.Text.Encoding.ASCII.GetBytes(TextBox2.Text + "$")
serverStream.Write(outStream, 0, outStream.Length)
serverStream.Flush()
[Code]....
View 4 Replies
May 16, 2012
am trying to pass a structure that contains 2D arrays as Byte from VB.net to a C++ dll. The dll returns the structure with the 1D arrays filled. I am using UnmanagedType.ByValArray to pass the arrays from VB.net to C++.
Sample :
----------------------------------------- Structure -------------------------------------------------------
<Serializable(), StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Ansi, Pack:=1)> _
[Code].....
View 2 Replies
Jun 11, 2010
I am having some major problems with byte arrays. First off the bigger array I have the more values go missing, I originally wanted to make a huge array and just dump like a 100mb chunk of memory in it but when I did that every byte in the array returned 0. So I experimented a bit and found 4kb to be the biggest chunk size to reliably not return 0.. ok I figured I'll just loop the 4kb and glue them back together later but no such luck, after being combined into the main array the bigger the number gets the more values that should be there just aren't.
Here's a code sample:
Dim retval(4095) As Byte
Dim combval(RLen) As Byte
For i = 0 To RLen - 4095 Step 4096
ReadProcessMemory(ProcAccess, i, retval, 4096, 0)
retval.CopyTo(combval, i)
Next i
WriteLine(combval(321603964))
WriteLine(ReadMemory(321603964, 1)(0))
So with the last 2 lines if I pull up some smaller number like 8 digits or so it reports back no problem but anything slightly bigger like the number i have written in there right now is just 0. After some additional research I discovered that the reason why 4kb is the max size I can reliably get is coz that's the size memory chunks are made of, "page" as they call it. Why the memory reading drops off at higher addresses alltho I suspect it has something to do with the way memory is structured and I am just not hitting the startpoint of a page anymore due to an offset or something somewhere.
View 3 Replies
Jun 21, 2011
I have an aspx page which houses an iframe. When a button is clicked, a WCF is called to produce a PDF which is read into a byte array. I was storing the byte array in a Globals.vb file like this:
Public Shared PDF_Data as Byte()
The global was loaded from the parent aspx page like this:
PDF_Data = MyWCF.Create_PDF_File(SomeVariable)
After that, the iFrame's src was set to a blank aspx page, which had the following code in the page_load event:
'Write the PDF binary data to the screen (viewer)
Response.Clear()
Response.Buffer = True
Response.ContentType = "application/pdf"
Response.BinaryWrite(Globals.PDF_Data.ToArray)
However, realizing that this application will have several users who will get different PDF documents, I have learned that this is not the way to go. My shared variable would be accessible to all users, a big no-no.However, I am stumped as to how I'm going to store the byte array and make it available to a child aspx page from it's parent.
View 1 Replies
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] .....
View 3 Replies
Mar 31, 2011
Working with System.Cryptography, I'm noticing that data arrays up to a certain size will either conform to the size of the Initialization Vector (IV) or the size of the Key provided. So with a 48-byte Key and a 32-byte IV, up to around 42 bytes of data will encrypt to 32 bytes and 44+ will encrypt to 48 bytes of data. I've tested this with a variety of data arrays, and it seems to always come out the same... but I have a concern that higher byte values in the original array may result in longer encrypted arrays.
how or whether I can construct byte arrays that will be guaranteed to come out of Encryption at a pre-determined size?
View 16 Replies
Dec 28, 2009
I have some data, stored in a byte array, compressed with LZSS compression. I've crawled the net for the last 2 days trying to find some code to decompress this data without success. Has anyone come across a suitable routine that can help?
View 2 Replies
Nov 28, 2011
As a continuation of my other thread, "Finding A Pattern without a string Array (http:[url]....)", I would like to continue asking questions about enhancing a scanner with a few things:
1. Here is my code for finding signatures in a file:
'First the Signature Class:
Interface Signature
End Interface[code]......
View 2 Replies
Apr 30, 2009
Dim Timing1, Timing2 As DateTime
Timing1 = DateTime.Now
MyCode
[code].....
View 13 Replies
Nov 9, 2011
my issue could be found simple but I'm founding it difficults in regard of dealing with array concept in oracle and vb.netI will start by showing to you a code done in oracle side1-this script should be executed in hr schema2-create a table and call it job_testas
create table job_test as
select * from jobs
where 1=2
[code].....
View 2 Replies
Dec 7, 2010
I am making an application which is capable of displaying a picture, and making adjustments to it. Unfortunately i'm stuck at this phase:The colour of each pixel in the image should be inspected and stored in one or more arrays.
My code so far
Public Class Form1
Dim OpenFileDalog1 As New OpenFileDialog
[code]....
View 6 Replies
Jul 2, 2010
I'm trying to match a string to see if it matches exactly this:####-####, it has to be 4 digits followed by a hyphen followed by 4 more digits. Right now I have this pattern: "d{4}-d{4}" but it's allowing 5 digits in either (or both) instead of strictly 4 per group. Here's an example of what it should allow:
1999-2000
2003-2007
2009-2010
and here's what my pattern is allowing but should not be allowing:
20081-2009
2009-20101
12345-12345
12345-1234-1234
View 5 Replies
Jan 17, 2010
I have 10 labels with 10 numbers and i want theses numbers to compare with other 10 labels with different numbers and when they found that second pair of labels are not equal with the first to show me in a new label where is the fault and in another new label the sum of the mistakes
View 3 Replies
Aug 4, 2011
So I have made a text editor using rich text boxes and it is made to save/open rtf files. I have 3 issues I was hoping to get answers for...
1. Can I (and if so how) make it able to open/save text files and rtf files (so the user can choose which way to save it)?
2. I added the ability to color the words, but instead of coloring just the highlighted parts - it colors everything in the file. How do I change that so it only colors selected text?
3. I also added the dialog for Font changes, but it does not seem to work correctly. I want it to change font/size/etc of whatever is selected. Right now when I highlight stuff and then go into Font it allows the dialog box but does not actually change the font size/type/etc in the file it has open.
Here is the code for the above 4 mentioned areas...
Save...
Try
Dim dlg As SaveFileDialog = New SaveFileDialog
dlg.Title = "Save"
dlg.Filter = "Rich Text Files (*.rtf)|*.rtf"
[Code] .....
View 7 Replies
Sep 10, 2009
I have a appliction developed on Visual studio 2003, .Net Frame work 1.1.After I migarted that application to Visual studio 2008, .Net Frame work 3.5, Visual Studio is crashed as opening some Visual basic designer files by Visual Basic Form Editor.The below is detail error message of Visual studio:
Problem signature:
Problem Event Name: CLR20r3
Problem Signature 01: devenv.exe[code]......
View 2 Replies
Nov 17, 2009
I have seen a few open source c# "Text code editor controls" that have auto indent and support contractions (+ - things you see in the code window to contract an if statement for example).
View 3 Replies
Sep 20, 2009
How do I read a raw byte array from any file, and write that byte array back into a new file?
View 3 Replies
