.net - Convert A Single Into 8 Bytes?
Jan 6, 2010
I have a single that might have a decimal place but might not. I have to put the digit before the decimal into the first 4 bytes and the digit after in the next 4 bytes.
So 1.1 would be 01-00-00-00-01-00-00-00
or 2.1 would be 02-00-00-00-01-00-00-00
or 1 would be 01-00-00-00-00-00-00-00
The digit before the decimal point is stored like an integer in bytes the same with the digit after the point. So 1.1 gets split into 1 and 1 and then stored as 2 DWORDS: 01000000 and 01000000
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Oct 12, 2010
I would like to use the USB port power as source and use the an amplifier on D+/D- Twisted Pair signal wires as my command line. I saw a thread suggesting to use the output as PWM. How can I send a single byte or stream of bytes to the port. Is it possible to read status of the D+/D- if they are shorted together?
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Feb 18, 2010
Since I like to use the ReadAllBytes and WriteAllBytes methods to save my variables to disk, I have had no troubles thus far with Integers.It has been easy to convert a short integer into a string of two bytes to save them using WriteAllBytes as following example:-
ReDimxji(0 To 601)
For I% = 0 To 300
J% = hbs(I%)
[code].....
But now I want to store some Single variables using WriteAllBytes, so I need to convert my single variables to a string of four bytes for each.
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Aug 20, 2011
I have a BIN file which I need to write a single byte to at the end and maintain the previous data. Here is an example.Viewed with a hex editor the file may have F0 FD 48 D3 C0 as the data. I want to be able to add to the end of it FF so that when I view it with the hex editor it is displayed as F0 FD 48 D3 C0 FF. I know how to open files for putting data but how can I take those characters and write them to the end of a file. I tried using the put function ( Put #FileNo, , MyStr) where MyStr = the characters in the textbox but it doesn't seem to work. Here is some code.
[Code]...
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Feb 22, 2010
See where my vb.net equivalent of a working c# assignment statement is not working?
bytes(i / 2) = Convert.ToByte(hex.Substring(i, 1), 16)
Here's the c# followed by the vb.net function.
private byte[] StringToByteArray(String hex)
{
int NumberChars = hex.Length;
byte[] bytes = new byte[NumberChars / 2];
[CODE]...
And the vb.net that is throwing the error within the for loop
Private Function StringToByteArray(ByVal hex As String) As Byte()
Dim NumberChars As Int16 = CShort(hex.Length)
[CODE]...
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Feb 16, 2011
How to check the Single byte character (e.g. English) and Double bytes character(e.g. Chinese) ?
Since I want to printing out their code which are representing in Hex.
However, Single byte character is using 2 digits of Hex. And Double bytes character is using 4 digits of Hex.
So, how can I check them and output with more readable pattern ?
input likes: 微軟 Microsoft output likes: B74C B36E 4D 69 63 72 6F 73 6F 66 74
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Sep 20, 2009
How can I get access in a fast way to the single bytes that form a double variable?
In pseudo-code I want to do something like this:
Dim myDouble as Double
Dim myArray(7) as Byte
myArray = myDouble
'continue doing things with the single bytes
The code is meant for use in a I/O-handler. The double-variables have to be sent / received via TCP. For this purpose they shall be put into / assembled from I/O-buffers.
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Jun 27, 2012
There are these 19 bytes (I am looking for combinations not the number of combinations)
17 00 00 00 A4 EA DB 13 02 00 00 00 00 00 00 A3 D3 02 CC
I need any possible unique combination which matches these "rules":
at least 4 bytes long the order of the bytes can't change(so 17 A3 D3 02 CC is ok but A3 D3 02 CC 17 isn't, because in the original string 17 was at the being but A3 D3 02 CC was at the end)
Let me try giving you examples of possible combinations:
17 00 00 00 A4 EA DB 13 02 00 00 00 00 00 00 A3 D3 02
17 00 00 00 A4 EA DB 13 02 00 00 00 00 00 00 A3 D3
17 00 00 00 A4 EA DB 13 02 00 00 00 00 00 00 A3
[Code]....
See the bytes stay in the same order for example the first byte 17 can only in the first byte's place
I don't want combination like
A4 17 02 CC
Because now 17 has changed order compared to A4
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Mar 8, 2009
My app displays the bytes downloaded in a label using:
Private Sub MyDownloader_DownloadedByteCountChanged(ByVal ByteCount As Integer) Handles MyDownloader.DownloadedByteCountChanged
lblDownloaded.Text = ByteCount.ToString()
End Sub
But I thought it would be 'nicer' if it display the amount as kb/mb/gb, etc.
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Dec 28, 2010
I'm trying to convert standard bytes like so:
00DEAD00BEEF0000
and convert it to base64.
I want it to go from bytes -> Base64.
Not
String -> Base64.
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Jun 13, 2011
I'm trying to send a 28 character string to a remote ip address and port. I've done this successfully in vb.net using the following code snippets:
Dim swon As String = "A55A6B0550000000FFFBDE0030C8"
Dim sendBytes As [Byte]()
sendBytes = Encoding.ASCII.GetBytes(swon)
netStream.Write(sendBytes, 0, sendBytes.Length)
I now have to convert this across to c++ and have the following so far:
char *swon = "A55A6B0550000000FFFBDE0030C8";
array<Byte>^ sendBuffer = gcnew array<Byte>(bufferSize);
sendBuffer = BitConverter::GetBytes( swon );
tcpStream->Write(sendBuffer, 0, sendBuffer->Length);
but am getting stuck at this point. I'm sure I'm missing a simple syntax error but I can't figure it out!To clarify, I'm not getting an error, but I don't think the string is being converted to bytes correctly as when I convert back, I just get a '01'
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Mar 15, 2011
I am receiving a data stream which contains 4 bytes of data which need to be converted to a 32-bit float (IEEE 754). This was easy to do in C as I created a union with a 4-byte array and a 32-bit float. Job done. However I have no idea how to accomplish this in VB (pls note I do not code in VB).
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Jul 25, 2009
Is There Any Possible Way To Convert Bytes To Readable text?
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Jul 19, 2009
Im making a database converter (phpbb to ipb)I noticed during analysing both databases that the posts of phpbb are converted to bytes as you can c here
-- Table structure for phpbb_posts
-- ----------------------------
CREATE TABLE `phpbb_posts` ([code]....
I want to convert those to regular text again but I have no clue how to script my converter to lookup the bytes place (after 0x) converts the string (as the bytes arent in array) and where to stop converting the bytes (after the ,)then replace the bytes text by the regular text and this needs to be in a loop because all posts need to be converted to normal text.
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Aug 8, 2011
I have to store the bytes of a image file inside of an XML file that is read by another program... The problem is, if I inject it as just plain bytes, the end-program has an error (presumably because it contains non-legal XML characters). How can I convert bytes into something that XML can legally read? I really have no other options at this point. I have to inject the image file as bytes (specifically a .bmp file).
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Apr 22, 2012
I have string, what contains bytes... (Example below)
And I need convert these bytes into text... But I really don't know how...
Code (For Better understand):
CODE:
and now, how to convert it into text? (The Result text in "ProductName", BTW)(I don't want to use Hex Editor still )
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Aug 13, 2010
Is it possible convert an array of bytes (PNG format) to image and then, show it in a picture box control?
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Feb 3, 2010
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.
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Feb 9, 2009
I am working on a project that needs to send hex bytes ie.Sub receives an integer like 276 and then performs
Dim CmdBuf() As Byte = New Byte() {Byte1, Byte2}
strHex = Hex(intNumber) which makes strHex equal to 114 in hex...
Next I need to break into separate bytes something like
Byte1 = Left(strHex, 1)
Byte2 = Right(strHex, 2)
But this does not work......Hex value of 114 needs to be converted into a couple of bytes like &H1 &H14 to be sent out the serial port.
.Write(Buf, 0, 2)
How can I do this?
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Oct 16, 2011
Is there anyway to convert an image file bytes array into an array of the real RGB values of that image?
I don't really want to use GDI+ or the System.Drawing library, but simply apply a certain calculation/processing to every byte of the image file and get another array that contains the RGB values of every pixel in that image. I know it could be done as I know how to do it in a different programming language (Python) but not in Visual Basic.
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Jun 8, 2010
I would like to know if there is any other way than using WriteableBitmap to convert the current screen into array of bytes.Because I am trying to get a screenshot of Esri map, but I am getting "pixel access not allowed" error
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Sep 9, 2009
The application is working good, i can receive data on port 48888 and i can write it to my logfile, but my problem is when i convert bytes to string. I have the correct data, but all the bufferReadSize is filled with space. Example: if i send only: test, my log file will have test and 4 lines of space only. In my code, right after Dim clientdata As String = Encoding.ASCII.GetString(bytes).
I tried to trim(), replaceI() or any string manipulation, and it's not working!%!? Is there anything i need to do before i can start manipulating that string?
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Nov 13, 2010
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.
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Sep 16, 2011
Ok 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.
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Feb 19, 2011
I 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]...
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Dec 28, 2010
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].....
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Jun 4, 2010
Follow-Up available: There's a follow-up with further details, see Convert MBF to IEEE.
I've got some legacy data which is still in use, reading the binary files is not the problem, the number format is. All floating point numbers are saved in MBF format (Single and Double). I've found a topic about that on the MSDN boards but that one only deals with Single values. I'd also would like to stay away from API-Calls as far as I can.
Edit: Just in case somebody needs it, here is the VB.NET Code (it's Option Strict compliant) I ended up with (feel free to convert it to C# and edit it in):
''' <summary>Converts a MBF Single to an IEEE Single</summary>
''' <param name="src">The MBF Single value</param>
''' <returns>The converted IEEE Single value</returns>
[Code]...
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Feb 26, 2012
i would like to convert a single byte to a string.
dim mybyte as byte = &h11
dim mystring as string
i tried
[code].....
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Jul 6, 2011
I have working code that will convert an xls to pdf, however, the code converts the whole workbook and I really just need to select a single sheet out of the workbook, but I can't figure out how to do it.The code I currently use is:
Dim fileName As String = "filepathfilename"
Dim xlsApp = New Microsoft.Office.Interop.Excel.Application
xlsApp.ScreenUpdating = False
[code]....
Where in the code do I need to specify the sheet in the workbook? Note that I will need to make it so that depending on an option fed into the app, the sheet will change, though I don't think that should make a difference, but I thought I'd mention it either way.
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Jan 20, 2011
I have a vbscript which I would like to compile into a single .EXE file. It's my understanding that you can't do this with vbscript and that the available applications which supposedly do the conversion are actually just glorified self extracting zip files which dump the vbs to a temp folder and run the script - not what I want.I've no experience in VB.Net and very little in VBS so I'd appreciate it someone could look over the script and let me know what areas I need to change so I can investigate the correct syntax in VB.Net.what the script does just in case there might be an issue from the conversion. The script does several things in this order:starts by scanning a CSV file (which contains a list of peoples usernames, their department and full name) looking for the line that contains a username match to that of logged in users's logon name via expanding the environment variable %USERNAME%..Once found, it splits the entire row into an array..Sets a series of Environment variables at Process level using contents of the array as values..Does a basic time check and sets the result as environment variable as above..Checks to see which version of CAD application is installed on users machine and starts application with command switch to process configuration file during startup..I don't think its overly complex now that I understand the VBS code but in VB.Net, I don't know what lines will work and what won't. I've not installed Visual Studio Express yet but will do so shortly - I presume this program is suitable for converting my script? [code]
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