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?
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?
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.
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.
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?
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.
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)
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.
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
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.
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.
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?
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?
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.?
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.
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:
± 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.
what would be the optimum code in VB2010 that check a file to determine:
1) is it a text file, and
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.
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 "ä" in quoted-printable is "=C3=A4". Using a normal conversion methods the result is "ä" (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.
I want to re-produce the equivilent of the DowArrow sign on a VB2010 Form label. label1.Text = Chr(ConsoleKey.DownArrow) doesn't work. The nearest character seems to be ASCII DEC 30 value., which will do fine, but Is there anyway I can reproduce this char on my form label, using one line of code, viz- label1.text =
I want to write the ASCII code chr(192) into a file but I dont know am I right.Is the function like this chr(192) or something different because it doesn't write the character 192 in the file. Or can someone tell me how to write something into a file using ASCII codes?
I'm Alan and I'm writing a little program (beginner), but I'm stuck and I can't get any further. So I hope one of you guys can help me solve following problem.Let me explain what I'm making, so it can give you all a better perspective.
For a this project I'm receiving data via the RS232 communication port. So basically I receive bytes. These bytes are converted to a string. So for example I receive this:"BAA" this is good because I can get the correct decimal value for "B"(66) and "A"(65) using the command asc("A") in .NET.but sometimes I receive a character that exceeds the 0-127 limit for example ""(128) (please see [URL]..But now when I try to get the decimal value of "" I get 63 instead of 128. I searched the Internet and forums for an answer but I didn't find one that fits my problem.
So if it's possible, can one of you code experts explain me how to fix this problem ? It would help me a lot. I hope I described my problem clearly, but if there are some questions,
I am receiving hex values for my step through debugging when I go over an integer. For instance if i have an integer of 1 it will show &H1, How can I get it to show the ascii character form instead of hex?
I am working on a client/server based application and I have run into quite a few snags stumbling my way through I have resolved quite a few issues, and need help with something new. I am using a TCPIP client/server and I find that at the end of each loop when I am reading the data from the network stream it appends a character to the end. I have tried removing the last character but I am not sure if it is getting the whole character successfully because I still get lots of different errors both in binary and xml deserialization whcih I think is related to this. Does anyone know the ascii code for the termination character for TCPServer/Client communications?
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.
The latest assignment from my teacher was to create a console program where the user enters a character and the respective ASCII value in Denary, Hexadecimal and Binary, Even Parity, Odd Parity and Hamming code is returned.I've managed to implement all of them except the latter with relative ease, I am familiar with the concept of Hamming code and can compute it easily by hand, but don't really know how to implement it as a function in my program. [code]
How do I write an expression to calculate all characters of each row by my own defined value to each character = all the A and B and C and etc. will be as 2 and all I and J and whatever ... will be 1 so I need an end result of the total.
