.net - Read 2D Barcode Encoded With Base256?
May 25, 2012
I have to read a 2D barcode that's encoded with base256. When I scan the barcode, it sends different characters as it comes from the keyboard and it changes the focus, turns visual studio in full screen, give the command to send to printer from notepad++.
I guess it reads ALT + TAB, CTRL + P, ALT + SHIFT, etc. and i can't capture all the bytes from the barcode.
I tried to capture the event on textbox KeyPress method with e.handled = True and e.keyChar added to the bytes()
On form.load I set:
Me.KeyPreview = True
And tried also on form.KeyDown with no luck.
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May 25, 2012
I have to read a 2D barcode that's encoded with base256. When I scan the barcode, it sends different characters as it comes from the keyboard and it changes the focus, turns visual studio in full screen, give the command to send to printer from notepad++. I guess it reads ALT + TAB, CTRL + P, ALT + SHIFT, etc. and i can't capture all the bytes from the barcode. I tried to capture the event on textbox KeyPress method with e.handled = True and e.keyChar added to the bytes()
[Code]...
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Nov 6, 2009
I was trying to read some file that is encoded with UTF-8 and save it as UTF-16 (Unicode) but it seems not to be fully working as all accents seem to vanish or are encoded to something that can not be read.
Here is the code that i am using:
Public Function GetFileContents(ByVal FullPath As String, Optional ByRef ErrInfo As String = "") As Object
Dim strContents As String
[Code].....
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Dec 12, 2010
I have downloaded the BarcodeLib.dll from[url]...
And however, my barcode scanner cannot read the hard copy barcode images that i have printed out as the following.[url]...
I have done research and some articles mention that dimension of the images will effect the readability of the barcode.
May i know what is the correct dimension to make my barcode images to be readable?
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Feb 2, 2012
How can i read a barcode from an image in VB.Net? Can I find a free dll or ocx for this work?
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May 10, 2010
I'm trying to read barcode using a scanner through a serial input(com1). Below you will see the code I'm working with, when I scan the barcode the code goes through the datareceived event and doesnt add the read barcode to the listbox. However when I use hyperterminal and scan the barcode it reads and displays the barcode.
[Code]....
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Jul 19, 2009
I want to write software in visual basic that reads the barcode of various items into my program.
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Aug 2, 2010
I am using Richard L. Grier's Enhanced Serial Port dll to read input from a serial port barcode scanner I notice that the datareceived event fires only once per barcode scan, but the delegate sub fires twice per barcode scan. Once for 1st half of Barcode , 2nd for 2nd part of barcode This makes it hard to capture the full barcode so it can be passed to routines in my vb.net 2008 windows application In Richard's example 'Test Enhanced Port' program he sends it to a textbox using .selectedtext and it works fine Richards Delegate code ......................
Public Delegate Sub DisplayData(ByVal Buffer As String)
'This delegate routine marshals receive data from the receive thread context DataReceived to the Windows Form STAThread context
Private Shared Sub Display(ByVal Buffer As String)
[code]....
I am trying to set a variable to the full barcode to pass to routines, instead of writing to a textbox but am not having any success
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Nov 27, 2009
I am a student and I am about to make a program that will use a barcode scanner well ofcourse to scan a barcode. My problem is i don't know what library to use and what certain things i need to do so that when i am going to scan a barcode it'll be something like show it on a textbox and pull something from the database. i've actually research some. i've seen mscomm1 (not so sure about that) and POS for .net (haven't fully understood its use) were those will help me develop my program?i have a metrologic ms9520 Voyager barcode scanner. and i am going to create a program for it in vb2005.
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Nov 27, 2010
I'm mohammed from Oman ,I'm visual studio.net programmer How I can Read the Data From Barcode Weight scales By Serial port and TcpIp port
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Jan 11, 2011
I have a data table being returned that populates a repeater. One of the fields has the & character in the data and displays perfectly within the asp:literal on the screen. The source shows the & character un-encoded.My question is this: Does it NEED to be encoded? A co-worker is insisting that it must be encoded in order to be "HTML compliant". But it works perfectly for display purposes. Is this REALLY required for any type of compliance that I should even be worrying about?
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Jun 15, 2011
I have a challange to convert the detected Encoding format of Text file to selected Encoding format. Like if the detected file is in Utf-8 and if user want to convert the encoding to Utf-16 or ANCII or Unicode. It will happen on one button click and the file will convert to the desired output encoding format.
Right Now I am able to detect the encoding but conversion not happening.
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Aug 10, 2010
How can I generate a UTF-8 Encoded XML string?
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Sep 3, 2011
I have an example of standard text (in Hex form) in a specific encoding (selected by the user). And I have a weirdly encoded text which is in the same encoding but a little different. How do I convert the Standard to the encoded Hex?
Cyrillic (ISO-8859-5) Example:
## 12 91 BB BE BA B8 C0 2E 20 CD BA C0 B0 BD B0 20 B8 20 BA BB B0 B2 2E <- ALTERNATIVE
B1 DB DE DA D8 E0 2E 20 ED DA E0 D0 DD D0 20 D8 20 DA DB D0 D2 2E <- STANDARD
Diff. from Standard (in Decimal): -32
Hebrew Visual (ISO-8859-8) Example:
## 1C 0B E0 E2 D9 DC EA 20 DE E1 DA 20 D5 DE E7 E9 D9 DD <- ALTERNATIVE
F0 F2 E9 EC FA 20 EE F1 EA 20 E5 EE F7 F9 E9 ED <- STANDARD
Diff. from Standard (in Decimal): -16
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Jun 24, 2009
I have a scenario where i have to Parse a UTF-16 Encoded CSV file and populate a treeview using VB.Net. I need to parse the CSV files which may also support other languages. how to proceed on this and what classes of .net I can use to solve this issue.
In VB.Net we do not have a provision to parse a UTF-16 file But There is a provision for reading UTF-8 encoded file.The method is OpenText(). I want a similar method but it should parse or read a UTF-16 encoded file.
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Apr 19, 2012
I am writing some rest calls to the LinkedIn API using web request and have hit an encoding issue.The LinkedIn API takes requires an encoded URI as one of the parameters on the lookup i am trying to run.
We are calling the api through .Net's WebRequest.Create; and when we pass in the URI it decodes it and as a result we can't get the data from the call. Im trying to open a URI like this[URL]..Is there a mechanism in the webrequest class to stop it decoding the passed in URI; or a work around for this?
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Jul 29, 2010
Question: In order to store logos in a database and display them dynamically in ms-reporting service, I need to base64 encode the image. It doesn't work with binary saved images, due to MS limitations...
Now my question: Which datatype do I use? Varchar, nvarchar or text? I guess varchar would be good enough, since base64 encoded, but images might be larger than 4000 characters...
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Jul 7, 2009
If On Open File BOM is npt found then i have to treat the file as UTF-8. If BOM compatible with UTF-16 is Found then load it as UTF-16 If BOM is not compatible with UTF-16 then post error message."Not Compatible"
How can I implement all these conditions at once. As the criteria for all is only BOM. how can I know if BOM is found or not. Kindly let me know.
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Apr 27, 2010
I need to pass encoded string to php page. To convert string to iso:Dim result As Byte() = Encoding.Convert(Encoding.UTF8, Encoding.GetEncoding("iso-8859-1"), input)
I have this code to pass string, but how I must do it to pass Byte (variable result) instead of the string (variable MyVarString)?
[Code]...
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Feb 20, 2010
I'm using this code to send encoded text to URL. This code is correct? Because if I send the same encoded string using PHP runs fine, but not in VB.NET
baseurl = "http://myurl.com/mypage.php"
client = NewWebClient
client.Headers.Add("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET
[code].....
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Dec 19, 2011
I have come across some Base64 conversion functions in .net(FromBase64.string etc). What i want is, for a sample, i have a base 64 encoded string as
"48YwojCi4yaiow==".
I need to convert this string to the corresponding Hexadecimal text(The sample stands for "Thisistest" in hex text) The below link is an online converter from base64 to hexadecimal text. If you give the same base64 encoded data in the link , click on convert, the one that is seen below "Hexadecimal text" is what I need.
[URL]
Is there a standard library function in vb.net which does this? Converting a base 64 data to a hexadecimal text?
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Dec 2, 2009
The issue i have is i wish to take user submitted credentials on a form ascii encode them and output the encoded string. [code]...
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Aug 13, 2009
I would like to create a HtmlHelper function for a specific kind of dropdown that appears on many pages in my app. I'm basically just trying to add some decoration around the existing DropDownList function, but it's being encoded.[code]....
but I'd rather make use of VB's inline XML. How do I get the results of DropDownList to not be encoded?
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Feb 15, 2012
I have created a program in Visual Basic using Microsoft Visual Studio 2010 Professional. There is a textbox that I use in the program that when the focus is placed on it will take the data encoded on a magnetic striped card such as a driver's license or any card that has this kind of data encoded magnetically. Very simple to get the data as the program takes all of it upon the swipe without having to do really anything, however, the problem is that I don't know which declaration to use when the swipe has stopped - or the last character has been entered. Currently I am using TextBox1_textChanged as my declaration, but that is called every time each character is put into the text box. When you are swiping, this is an ongoing process until the last character is put in. So if I have a magentic card with 10 characters in it, this method will be called 10 times. Is there a declaration that I can use that only fires off whent he swipe has loaded all of the characters or some kind of loop that I can incorporate?
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Apr 14, 2010
Greetings, I'm looking for a way to encode a string into HTML that uses human-readable tags such as ê (=ê). At the moment, I am using the HttpUtility.HtmlEncode() function, but it appears to return numbered tags instead of human-readable ones. For example:
Dim str as string = HttpUtility;HtmlEncode("vente - en-tête")
'Expected: vente - en-tête
'Actually received: vente - en-tête
Is there a setting or function in ASP.Net to encode a string into HTML resembling the first comment?
EDIT: I am looking for this kind of functionality because the text is saved HTML-encoded in the database. The text comes from a bunch of MS Word documents that have been converted to HTML.
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Feb 10, 2010
I'm having an issue with trying to use VB.NET and the WebRequest object to post some cXML text and an attachment.I believe I am formatting the text of the data I wish to post correctly, as it matches samples Ariba has supplied. What I am uncertain of is if I am correctly using the WebRequest object to do the posting.I am setting the Method as "POST" and the ContentType as "multipart/mixed".I can successfully post cXML (using a ContentType of "text/xml") The message I get back from Ariba is "The document could not be parsed: Missing start boundary [ANCLS-741552]", however, as the following code shows, there is a start boundary.I have removed some proprietary data and replaced it with "...". Following the MIME text, I have included the relevant VB.NET code I am using.[code]
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Jun 13, 2007
I have a problem reading ID3v2 text identifier tags when they are encoded in unicode. If i update the tags using winamp the tags are encoded in UTF-16 with BOM. When i try to read the tag i step through each byte and use chr(byte) to get the character that that byte represents. But when the bytes are unicode i get some characters (shown below) as the first two characters:
The remaining characters are correct, it's just these 2 first ones.
What are these for? and how can i get rid of them or read the bytes as unicode characters? i've tried reading the ID3 website and many other sites too but i don't know what to do. i can check the text-encoding byte in that tag frame to determine whether or not the tag is encoded in unicode or ISO-8859-1 but i don't know what to do next.
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Jul 25, 2009
I know pretty much how to save information into a text file from runtime VB2005. However, I wish to be able to write the information into any kind of form of file that cannot be simply opened and read by anyone (such as text file can be). Is there anyway that VB2005 can do this?
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Dec 3, 2009
I need to Base64 encode a string, but the encoded string cannot contain "+". Wikipedia mentions a modified Base64 for URL, but I can't find a .NET class which uses this.For my application, I can't even URL encode "+" into "%2B". This is because I pass the encoded string to a service which I have no control over, and that service mangles any strings which contain "%2B". For this reason, I want my encoded string to only contain A-Z, a-z, 0-9, -, and _.
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Jul 21, 2010
I am writing an inventory control application in which a barcode scanner will be hooked up to a laptop computer in our shipping/receiving department. What I'm wondering is, whenever a shipment comes in and the receiving clerk starts scanning the products, what exactly do I need to do in order to setup our database so that the scanner recognizes which vendor/product etc. and puts the data in the correct tables. I've written inventory control apps before but never one that incorporated the use of a barcode scanner.
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