Converting An ASCII 6-bit String To 8-Bit ASCII Characters?

May 9, 2011

I'm working on decoding a NMEA sentence that is a compressed 8-bit string. I'm having a very hard time of wrapping my head around the bit manipulation needed to convert this string. If someone could get me started with this it would be great.

Here is the incomming string:

!AIVDM,1,1,,A,14eG;o@034o8sd<L9i:a;WF>062D,0*7D

and here is the expected output:

[code]...

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Asp.net - Character Support - Translate Higher ASCII Characters To Lower ASCII Characters?

Aug 7, 2009

So I have an ASP.Net (vb.net) application. It has a textbox and the user is pasting text from Microsoft Word into it. So things like the long dash (charcode 150) are coming through as input. Other examples would be the smart quotes or accented characters. In my app I'm encoding them in xml and passing that to the database as an xml parameter to a sql stored procedure. It gets inserted in the database just as the user entered it.

The problem is the app that reads this data doesn't like these characters. So I need to translate them into the lower ascii (7bit I think) character set. How do I do that? How do I determine what encoding they are in so I can do something like the following. And would just requesting the ASCII equivalent translate them intelligently or do I have to write some code for that?

Also maybe it might be easier to solve this problem in the web page to begin with. When you copy the selection of characters from Word it puts several formats in the clipboard. The straight text one is the one I want. Is there a way to have the html textbox get that text when the user pastes into it? Do I have to set the encoding of the web page somehow?

[Code]...

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Converting Characters To ASCII Code?

Mar 9, 2009

reading special characters within my VB code. ASCII code Char(34) = " works fine but Char(60) = < and Char(62) = > are not being read.

My Code

node.FirstChild.InnerText = Chr(60) & "httpRuntime executionTimeout=" & Chr(34) & "999999" & Chr(34) & " maxRequestLength=" & Chr(34) & "2097151" & Chr(34) & "/" & Chr(62)

[Code].....

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Feb 14, 2012

I have a program written in VB.NET and I have a textbox for the RFID tag (which is in ASCII format) and then convert it to a simple text format to be saved to my database. How can I convert ASCII to plain text to save to my database?

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Define A String Literal Containing Non-ASCII Characters?

May 19, 2010

I'm programming in VB.NET using Visual Studio 2008. I need to define a string literal containing the character "√∑" equivalent to Chr(247). I understand that internally VS uses UTF-16 encoding, but when the source file is written to disk it contains the single byte value F7 for this character.

This source file is processed by another program that uses UTF-8 encoding by default, so it fails to interpret this character correctly, attempting to combine it with the following single-byte character. What encoding would correctly interpret the single byte F7 as the single character √∑?

Alternatively, is there a way of expressing a non-ASCII literal that uses only ASCII characters - like using some kind of escape sequence?

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Get The Length (i.e. Number Of Characters) Of An ASCII String In .NET?

Jun 17, 2009

I'm using this code to return some string from a tcpclient but when the string comes back it has a leading " character in it. I'm trying to remove it but the Len() function is reading the number of bytes instead of the string itself. How can I alter this to give me the length of the string as I would normally use it and not of the array underlying the string itself?

Dim bytes(tcpClient.ReceiveBufferSize) As Byte
networkStream.Read(bytes, 0, CInt(tcpClient.ReceiveBufferSize))
' Output the data received from the host to the console.'

[code]....

Len() reports the number of bytes not the number of characters in the string.

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Aug 11, 2009

What do i need to do to convert a recieved byte from Ascii to String, so i could display it properly on a textbox?

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Oct 9, 2008

How to correctly convert string containing upper ASCII characters to byte array besides looping through each character and filling the array using AscW(chr)?I know I can do something like:

Code:
Dim bSourceData As Byte() = System.Text.ASCIIEncoding.GetBytes(sourcedata)

But this only works for lower ascii characters (0-127).Instead of ASCIIEncoding I can specify encoding myself (System.Text.Encoding.Getencoding(encoding).GetBytes(sourcedata)). But I have to specify correct encoding in this case, otherwise most of special characters are converted to "?". What should I do if I don't know the encoding?

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.net - Microsoft.VisualBasic.FileIO.TextFieldParser Changes Ī Ascii 241 To ? Ascii 63?

Dec 11, 2010

I am using Microsoft.VisualBasic.Fileio.TextFieldParser to parse a CSV file that was created with Excel 2003. The parser is working great with the exception that it is converting extended ascii values to question marks! So if the file content was:

Ī 3
The TextFieldParser is returning
? 3

I have tried all of the encodings in the System.Text.Encoding package with no luck. I thought I had it with UTF7 but it was dropping other characters like replacing the + sign with a space.

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ASCII To HEX Buffer Converting?

Sep 16, 2009

The reply buffer is in ASCII value...but I need is HEX value.Is there any way that the reply buffer is in hex?

Code:
Public Function read_write_string(ByVal devicehandle, ByVal command, ByVal commandlenght) As String
Dim inputReportBuffer(100) As Byte
unManagedBuffer = Marshal.AllocHGlobal(inputReportBuffer.Length)

[code]....

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Constants For ASCII Control Characters?

Feb 26, 2012

I have an app that I have been recoding in vb.net formerly written in VB6. In this app I use some ASCII control codes such as ACK NAK ENQ US RS EOT. The VB6 app uses the CHR() function with the proper ASCII codes to handle these but in recoding I would like to use something more meaningful and descriptive than CHR(4) for example.

[Code]...

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Convert Characters To 7BIT ASCII With .NET?

Jul 26, 2009

is there a way to convert characters to 7BIT ASCII with .NET?

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What Is The 'whitespace' ASCII Or Unicode Character In System.Text.Encoding.ASCII.GetBytes (whitespace)

Nov 4, 2009

I would like to pass a whitespace character by using the System.Text.Encoding.ASCII.GetBytes(" "),† and System.Text.Encoding.Unicode.GetBytes(" ") , where " " is the whitespace Character required.† What do I need to type (" ") to get a whitespace character passed.?

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Character Encoding - Converting UTF-8 To ASCII?

Feb 20, 2009

I am writing a console application, which reads emails from different email boxes and processes through them. Emails are received from various automated systems. The email messages are logged and/or sent forward.

The problem is that some emails are encoded in UTF-8 and transfer-encoded in quoted-printable which messes up special characters (mainly ä,ö and å). I have not found any solution to convert them in readable format.

For example "√§" in quoted-printable is "=C3=A4". Using a normal conversion methods the result is "√ɧ" (gibberish).

I shamelessly ripped this example conversion table from here: [URL]

[Code].....

So how do I get the real codepoint from UTF-8 value? I'd rather not use any external libraries. Besides I've tried a couple already and they failed.

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VS 2008 - ASCII To HEX Buffer Converting

Sep 16, 2009

I found this function from the net. But I have a problem with the reply buffer. The reply buffer is in ASCII value...but I need is HEX value. Is there any way that the reply buffer is in hex?

[Code]...

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Feb 14, 2012

I'm using IO.File.ReadAllLines(FileName) to read all lines from text file to array of strings at once. Problem is, text lines include ANSI characters above ASCII value 127 (Scandinavian letters e.g. " (Ascii 196), (Ascii 246) and (Ascii 233). Array is build up nicely, but all chars above ascii value 127 are not shown right. How can I use ANSI character set with .ReadAllLines to correct this problem? In VB6 with "Open Filename For Input As #1 / Line Input #1, txtLine" there wasn't any problem. OBS: This is already solved, found the answer by myself:

Dim myEncoding As Encoding = System.Text.Encoding.GetEncoding(1252) ' Windows-1252
Dim strLibrary As String() = IO.File.ReadAllLines(FileName, myEncoding)
Problem was to find right character set, which was Windows-1251 (ISO-8859-1)

[code].....

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Apr 24, 2009

I want to explicitly inform my user that they are not allowed to use any characters from the extended ascii character set (128-255). When I try to create a string of these values using the following [Code] It outputs them fine, with the exception of a bunch of blanks in certain areas(I am assuming these characters are unprintable), but I noticed that when I hover over the value of sVal in the VS, the tooltip/quickview of the value is written nicely on one line. Any ideas how to remove characters that would appear to be blank spaces (unprintable) when outputting this list?

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VS 2008 - Extended ASCII Characters In Stream I / O

Jul 19, 2011

I am using StreamWriter and StreamReader in VB.NET 2008 Express to read and write ASCII text files. When I create the file and later read it, there is no problem, because I use System.Text.Encoding.UTF8 on both the write and read sides, so extended text is handled without problem. But sometimes, I have text files come in that are just straight 8 bit ASCII without the Unicode BOM... and they get a lot of junk when I try to read in anything with extended ASCII characters in it. It seems like the 8 bit extended characters are translated into multi-byte codes, and since they are filenames, of course, that doesn't work. Since the filenames just have straight 8 bit ASCII filenames. I have tried all sorts of encodings, and nothing seems to work.

The most common character that causes a problem is an "a" ... it is used in a lot of proper names. The funny thing is that sometimes is seems to workout... is there a way to read these types of text files? Some way to just tell StreamReader not to decode the text, just treat it as straight plain 8 bit ASCII text (with the old IBM PC mapping, I think). The one thing that works is to manually edit the input, replacing the extended characters with their un-accented partner and then renaming the files to match the new spelling. Maybe I should just go to read them as byte input and breaking the lines apart in my code.

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Convert Characters To ASCII Values Using Visual Basic?

Sep 25, 2009

I'm an undergraduate student from Singapore University, would like to enquire you on how to convert character codes to ASCII codes using visual basic. regarding the codes on how to build it as I need it for my semestral project

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Displaying Data In One Text Box All In ASCII Code/characters?

Oct 12, 2009

I have made an application in VB 6.0.In this application ,i am connecting one controller through serial port to laptop.I†have used†MSOMM control for this purpose.Controller is sending data as a string .On VB 6.0 applicaton in laptop ,i am getting data displayed in one text boxall in ASCII code/characters.Total chatacters in string are 61.My problem is this that all 61 characters are comming in one text box.I want thateach character should come in seperate text box so that i can be able to display them individually,i.e. 61 characters and 61 text boxes.

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VS 2005 Ascii Unprintable Characters In Windows Vista?

Jul 15, 2010

i have a problem a in vb.net in Windows Vista Basic environment, while using the chr(0) it gives an empty string, while in windows XP chr(0) gives the following character  am wonderign why in windows vista it can't result to the same thing actually it amounts to NOTHING as the result.

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Jul 18, 2009

I need to write an application for receiving data (ascii characters) from microcontroller through the serial port in three separate parts. I've created three RichTextBoxes, but I do not know which commands I need to type. In first textbox I need to receive one byte... next six bytes need to be placed in second text box, and finally last seven bytes need to be placed in third textbox.

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Aug 23, 2011

I am having a bit of trouble converting a single stored in a string as four hex values. I believe my problem stems from some Unicode hex values not matching the corresponding ASCII hex value above 0x7F (127). For example, I have the following single stored in a string; "518.42" or 0x44019AE1. The char that would contain 0x9A if the data type were ASCII contains U+0161 which will not convert properly to a byte array. My question is: Is there any way to force a string to be of ASCII rather than Unicode? Or maybe there are other recommendations? For reference I have tried both of the following. The first throws a format exception and the second converts to the wrong single.

Private Function ConvertHexToSingle(ByVal hexValue As String) As Single
Try
Dim iInputIndex As Integer = 0
Dim iOutputIndex As Integer = 0

[code].....

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Sep 19, 2010

I've tried searching for this, but most people just want to convert hex values into their ASCII equivalents. That's not what I am looking to do.I'm looking to see if VB.NET has a simple built-in function to do this:

Private Function NibbleToString(ByVal Nibble As Byte) As String
Dim retval As String = String.Empty
Select Case Nibble[code]....

Is there a more elegant way to accomplish the same thing as that code?

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Convert An ASCII String To Hex For VB 2008?

Jun 13, 2010

I'm trying to convert an ASCII String to hex for VB 2008. So far I have this :

Code:
Function asc2hex(ByVal StrName As String) As String
Dim loopCount As Integer, strHold As String
For loopCount = 1 To Len(StrName)
strHold = strHold & Hex(Asc(Mid(StrName, loopCount, 1)))
Next loopCount
asc2hex = MsgBox(strHold)
End Function

However, It is not reporting all the bytes that it should be. For example: This is the correct format.

[Code]...

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Aug 2, 2011

I need some thought input on how I can take my string of HEX values and convert them to ASCII according to the specifications below: A function would be ideal since I need to quickly decode about 250 records all having 20 thresholds to record.[code]

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Feb 15, 2011

I have lines of text that contain "degree symbols" (ASCII(248)). I want to replace those symbols with an alphabet character (Z).I am changing the line of text into a charArray,iterating through one character at a time. How do I define the ASCII(248) in code to replace each occurence with a Z? Something like string.Replace(ASCII(248), "Z") would be nice, but that doesn't seem to work too well.

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Aug 12, 2010

way to convert byte array to ascii string?

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Sep 15, 2010

This illustrates†a series of bytes that I've received from a socket and assigned into a byte array (frameData). How do I extract the ascii string from frameData if FrameData.Length is 79 bytes long and I need to extract the byte locations whose begin†-frameData(26)†and end frameData(44)†are given by the arrows I've drawn?

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I have a code for converting characters to it's ASCII-value. I want to display this in a textBox, but when I stuff it into a ForLoop VB says that the Index is outside the bounds of the array... if I take the L-1 (see code below) I miss the first character...

Private Sub btnRecieve_Click(ByVal sender As System.Object,
ByVal e As System.EventArgs
) Handles btnRecieve.Click

[code].....

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Jul 21, 2010

How would I copy/convert a string containing an ascii representation of hex values in to a byte array containing the actual hex values? For example, I have a variable containing the hex values delimited by spaces (I can change the delimiter):

[Code]...

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Jun 18, 2011

If we have a string that contains for example "01_1A" in ascii, I would like to take first two chars and following two chars after mark and send it as hex format, like &H1 and &H1A.

Note that I would not convert ascii to hex. I am asking for something like &H(var).

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Apr 19, 2011

I am working on a text-based game and as your character moves, you get informations such as the room name and below, a description (Lorem ipsum in the example) which is an array of string. I would like to know how to append characters to it. I am actually trying to display a minimap made of ASCII character. See the second bloc code for an example.

From:

code:

Into:

Room Name Here

code;

The game itself is made in VB.NET but a solution in pseudo-code is also welcomed. Also, each line's length is aproximatively the maximum length it must be.

The desired output must be an array of strings because this data is later send to a client connected using sockets.

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what would be the optimum code in VB2010†that check a file to determine:

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2) if it is a text file, †does it contain any non-ASCII characters

Note that LF, CR, and EOF would be expected, and should not be flagged.† I can think of 3 - 4 ways to do it, but there may be a 'best' way in terms of simplicity and speed.

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The below lines does not write anything to the file, ascii.txt. Trying to write the ascii equivalent of hex "88". However nothing is written to the file, nor nothing is asssigned to the variable, ascii.

Dim ascii = ChrW(Convert.ToInt32("88", 16))
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In excel or openoffice, you can get the ascii equivalent using the below formula. What is wrong with the code?

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Jan 1, 2010

Here's my code and the result, as much as I know, is in ASCII:

Private Sub Form_Load()
With MSComm1
.CommPort = 1
If .PortOpen = False Then

[Code]...

I need the data to be in Hex

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my name is Altair da Silva and I'm writing a Jeopardy game. I have most of the program done. I got stuck at one part. I have been trying to create lines of codes that would result in a buzzer. This buzzer has to work right after the msgbox with the answer comes up. I'm using a clickhandler and i would like to have this code under the clickhandler. I have tried almost everything. I know that there is a way of doing it, but i dont know how.

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I am trying to validate a textbox by checking the ASCII values on PreviewKeyDown event of the textbox.This method woorked fine with WinForms using vb.NET.The problem comes wen I use it in WPF.Is there a better method of carrying out validation of textbox in WPF forms ??

[Code]...

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Aug 29, 2010

This has been driving me crazy for two weeks! I just started learning Vb.net, so please forgive me if I make rookie mistakes. Basically, I would like to convert any type of file to Ascii code. An mp3, .wav, .avi etc. The most I was able to do is convert only the first character of the file to Ascii. Also, I'm not sure what would be the fastest method to do this. SteamReader, FileStream, or BinaryReader. Can anyone explain what method would be best? This is what I have so far:

[Code]...

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i got a problem when receiving data from networkstream that was converted from bytes to string.. the output would be the same but when i compare the the string generated from Encoding.ASCII.GetString() compared to the actual string, the output is not the same..

This is my code..

Server:

CODE:

Client:

CODE:

just for ping purposes.. :)

my server pings to client..is there any instance that when the string will be converted to bytes, the string will change?

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I am receiving ASCII data over my serial port. "51 48 46 48 48 49" for example, this represents my temperature of 30.001 degree. Now I would like to convert this ASCII numbers nad combine to readable temperature and store my data into an excel table. [Code]

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I want change the text of RichTextBox to there ASCII Values. And opposite of this, ASCII value to text.

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I'm testing a "simple" login program: it has predetermined ID and Password, after input is correct then you can change the ID and Password. It saves a Non-Encrypted file that has the new ID and Password. Then after the program loads (when it is opened again) it reads the file to retreive the ID and Password, but when it reads, it reads it in 32-bit code, I need it in Ascii (with alphabetical representation) so that I can compare it to the input.I also get an error stating the length cannot be a negative (right after my comment).

Here is my code:

Imports System
Imports System.IO
Imports System.Text

[code]....

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