How To Decode GIF Pixel Blocks
May 24, 2009
I need to know how to decode GIF pixel blocks. The example block that they are using look like this "00 51 FC 1B 28 70 A0 C1 83 01 01" and i cant under stand how they converts that to "100 028 0FF 103 102 103 106 107 101" !?!?I mean... 00 51 FC 1B 28 70 A0 C1 83 01 01 === 00000000 01010001 11111100 00011011 00101000 01110000 10100000 11000001 10000011 00000001 00000001 if I read that like 9bit each it no way I get this result != "100 028 0FF 103 102 103 106 107 101" ?
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Jan 30, 2009
I would like to load a GIF file, and start with the first pixel and check to see if that pixel color is closer to Black, Red, Green or Yellow, then take what ever color it closest matched to and output that color as a number, 0, 1, 2 or 3. So just for a small example a 5x4 GIF would be converted to something like this: 0112223322220111332?
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Jul 4, 2010
How do i determine the pixel width and pixel height of the largest image i can paint onto the graphics object of a printer while inside a printpage event?
Imports
System.Drawing
Class
[Code]......
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Sep 13, 2007
Is there a quick way to check the color of a pixel on the screen?
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Jul 20, 2009
during the development of my project, i've fall in the need to change the position of some forms, pixel by pixel using a timer.Now, i've checked that the movement is very fluid when form is not very heavy, when it contains few elements, but when it has a lot of elements inside, the movement becames nervous and not fluid, the movement becomes jerky.
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Jul 29, 2010
How can I find out the pixel colour of a certain point on a web browser. For instance,WebBrowser1.getPixelColor(0,0) would get the rgb colour value of pixel 0, 0.It doesn't have to be rgb it might be hsl or whatever.The web browser is showing a local web page that is hosted on a network. If there is an error then the screen goes all grey. What I want to do is, if this does happen, display an alert message like - "An error has occurred
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Apr 16, 2011
I have an empty picture box with the background colour set to the transparancy colour. How can i get the colour of the pixels within the transparant picture box so that i can create a bitmap of the transparant section of the form?
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Nov 8, 2011
I have a project that i am getting an XML file that has an embedded PDF file that is encode in UUencode. Is there anyway to do this in VB.net?
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Jun 24, 2012
I would love to read the QueryString value of t. So i can parse it as GUIDUnfortunatelly that & thing, seems to mess things up.
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Jul 19, 2011
I have to provide a client with a method to retrieve data from an Audiometer. The equipment is discontinued, but they have six of these and are used every work day. Using port monitoring and the DUMP command on the peripheral I was able to read the data and save to file. Now my challenge is decoding each line. It appears that only a section of the string is not in plain values.I added the pipe separators for clarity. I have determined those columns are: EMPID | DateTime | TechID | Results | ResultType = Test.[code]
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May 8, 2009
I need to validate a basic authorization header that is being sent to my HttpListener in VB.NET. I'm grabbing the header like so (feel free to point out better ways to do this as well):
EncodedAuth = Context.Request.Headers.GetValues("Authorization")(1)
Now how do I decode them? I understand the theory but I can't seem to find the right code.
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Jun 6, 2011
I've been developing a SAML 2.0 SSO. I got a problem in decoding 64Base string to convert it into an xml then read the content later on.Below is the code I've been using:
Protected Function uf_getIDFromSAMLRequest(ByVal as_samlRequest As String) As String
Dim ms As New MemoryStream(Convert.FromBase64String(as_samlRequest))
[code]....
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Nov 17, 2008
I have a text like :
Code:
aHR0cDovL3d3dy5kZXNpY2xpeC5jb20=AAAAAAAZGVzaWNsaXguY29t
aHR0cDovL3d3dy5zYW5kcmFjbGlja3MuY29tAAAAAAAd3d3LnNhbmRyYWNsaWNrcy5jb20v
aHR0cHM6Ly93d3cuYnV4b3V0LmNvbQ==AAAAAAAd3d3LmJ1eG91dC5jb20=
aHR0cDovL3d3dy5vc29jbGljay5jb20=AAAAAAAT3NvQ2xpY2s=
And I want.. an example... These strings are encrypted (excepting AAAAAA). I want to call Decode (string) for:
Code:
aHR0cDovL3d3dy5kZXNpY2xpeC5jb20=AAAAAAAZGVzaWNsaXguY29t
aHR0cDovL3d3dy5zYW5kcmFjbGlja3MuY29tAAAAAAAd3d3LnNhbmRyYWNsaWNrcy5jb20v
aHR0cHM6Ly93d3cuYnV4b3V0LmNvbQ==AAAAAAAd3d3LmJ1eG91dC5jb20=
aHR0cDovL3d3dy5vc29jbGljay5jb20=AAAAAAAT3NvQ2xpY2s=
And insert it into this code:
HTML Code:
:idea: [url=VALUE AFTER AAAAAA]VALUE BEFORE AAAAAA[/url]
I know that this not HTML...
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May 25, 2012
I'd like to build a simple json looking like this: {"Count" : "55", "total" : "125,55"}On my vb method i'm doing this to encode it:Dim json As String = "{""Count"" : "" " & intCount & " "", ""total"" : "" " & intTotal & " "" }"But I think Im missing something to escape the quotes, when my browser received it, it looks like this: {"d":"{"Count" : " 5 ", "total" : " 55 " }"}making it unreadable for jQuery.
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Feb 8, 2012
I have collected and created a lo of nice programs but after infected it was deleted by viruses and now i found the program which recovered from ntfs.
But the problem with that i can't decode my project codes.
I tried to find the sulution how to decode word strings [code]...
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Jan 2, 2010
i have been working on VS 2008 for past 6 months and right now i am working on some little project which requires the value in reg_binary in XP to be decoded to readable string of the original form
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Dec 30, 2008
I am trying to encode and decode using the unicode language and I don't know why I am getting these errors.
Public Class Form1
Dim strEncodedBytes As String
Dim chrTestChar As Char
Dim intCharCode As Integer
Dim strCodedMessage As String
Dim strMessage As String
[Code]...
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Nov 10, 2011
I have a call to Server.URLEncode(string) from an old asp file that stores user input into a table. In this case it was a string of Chinese charters.
The actual data is :
%E8%B0%B7%E6%AD%8C%E7%9A%84%E5%89%8D%E6%99%AF%E9%BA%A6%E5%85%8B%E6%96%AF%E9%9F%A6
I rewrote the code to vb.Net and after I get the data from the table, I call
HttpContext.Current.Server.UrlDecode(string) to decode the string, add it existing mark up for an email and send it on its way.
Note that with Visual Studio i can see the HTML markup as it appears in the email, and ALL of the Chinese data is EXACTLY as I would expect it.
When the emial is received i get "???????????" characters where there should be the Chinese characters.
What I do not understand:
What Server.URLEncode actually encodes the data to. It appears to be HEX.
What the array of "?" means in outlook or any other email system that opens it, I assume it means "Hey i cant convert this stuff, so here is a question mark for kicks, good luck."
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Sep 25, 2009
I am trying to write a function which has the ability to decode a string from utf8. I am getting the string as a response from a webserver.I am using the following line to do the decoding:
DecodeReply += System.Text.Encoding.ASCII.GetString(System.Text.Encoding.UTF8.GetBytes(temparray(i).ToString))
[code].....
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Jun 8, 2011
I'm using the zxing C# port to decode a QR barcode.The code is simple and based on an example I found online (see below).The problem is, it always throws an "Index was outside the bounds of the array" exception.My code sample happen to be in VB.NET, but the zxing library is implemented in C#
Dim re As qrcode.QRCodeReader
re = New qrcode.QRCodeReader()
Dim Img As New Bitmap("<image file path here>")
[code]....
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Nov 22, 2010
I want to read and decode image to text. Like megaupload captcha how I can convert the image to text or how to read it as words.
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Oct 22, 2011
This is kind of a brain twister. First, what it involves. I'm writing an application that is working with values sent to and received from an 8 bit micro-controller. There are 8 bits of specified values. Here they are. bit1 = 1, bit2 = 2, bit3 = 4, bit4 = 8, bit5 = 16, bit6 = 32, bit7 = 64 and bit8 = 128.I made a routine that uses 8 checkboxes to add the values for sending them to the micro-controller. That wasn't too hard. In my appp there are 8 checkboxes. Each checkbox assigns one of the specific bit values to a variable (or subtracts it when unchecked). The total of the variable is then displayed in a textbox and ready to send.Now the hard part that ed to take any number between 0 and 255 apart in values that will be a combination of the numbers (1,2,4,8,16,32,64,128) above and show each checkbox which is assigned those numbers to be checked.
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Jul 30, 2010
I have the following code:
Dim lStatementText As String
Dim lStatementString As New System.Text.StringBuilder
lStatementString.Append(RndRes.Forms.txt_request)
lStatementString.Append(" ")
lStatementString.Append("<b><a>")
[Code]...
Where Request.ID, Request.Description and also RndRes.Forms.txt_* are all strings. I want to display the string I build up here in a Infragistics FormattedLinkLabel. The problem is that if any of the strigs from the Request class contains a HTML character, the label is not displayed properly and the HTML encoding is broken.I need to find a function that masks the HTML codes.
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Jun 4, 2010
what's the vb.Net counterpart of the following blocks in Csharp?
[Code]...
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Oct 18, 2010
i am making a Reflector,I want Some help with generating Blocks of Code(Loops,Branching,using Blocks,Switch Case Blocks etc).Until now i am able to convert IL to expressions and identifying startoffset and endoffset of a Code Block for Generating Code Blocks..The Trouble i am facing is Identifying the Initializer, Incrementer and Condition in a For Next Loop. which are contained between the StartOffset and EndOffset as Expressions. [code]
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Feb 29, 2012
I am working on a project that requires that I use nested case blocks. However, I am not quite sure what this looks like. And for whatever reason I'm having a hell of a time trying to find the answer through google. Are nested case blocks like nested if blocks? Or are they something completely different? More information on the project can be given if needed.
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Jun 4, 2010
what's the vb.Net counterpart of the following blocks in Csharp?
public class NullableDateTimePicker : System.Windows.Forms.DateTimePicker
{
Default Constructor
public NullableDateTimePicker() : base()
{
[code].....
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Sep 10, 2010
So you know how when you call "Form.ShowDialog" from where ever you call it, it blocks until the form being displayed closes. And then the function returns whatever result it was.I want to know how to block like, but without a form, yet still have the "main ui thread".Basically I have this long process that needs to thread out and do several things... and it's heavily event based. It jumps between two threads, the main ui thread, and it's own background thread. The main ui thread needs to have access so that I can randomly open different dialog boxes for things... sometimes they're just windows asking to hit OK or Cancel to continue, others it's to perform some action, etc etc.
But there is NO central form related to it. It's a complete background thread running that randomly hops over to the main ui thread for things.Right now I have this class I designed called lets say "DoJobProcessor". On it is a function called "BeginDoJob" that threads off from the thread pool... when ever I need to jump back I use a ManualResetEvent to block on the background thread, jump over to to the main thread with "invoke" and passing a reference to the MRE, then release the block when done there and continue on on this background thread.
All while this is going on I just set the form I'm trying to block the main ui thread from managing by just setting its Enabled property false.It all feels just messy and annoying... and I was just writing something using ShowDialog and I was like... HEY, what if I could block this BeginDoJob method, hi-jack the main ui thread, then let that function return the result when done instead of having this "Complete" event with the return value in it. It's obviously possible because ShowDialog does it, but I don't know how.
This way the job I'm performing isn't always waiting for the main ui thread, instead its the other way around... the ui thread waiting for it, the way it aught to be. Show something, branch off do some stuff and just idle the display while it does it, come back show something else, branch off and just idle while it does that.
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Jul 19, 2011
Im working on a somewhat major program for my work. Just in short, im reading in a text file but i then want it to break the text file into blocks. I will put a quick snip of it here:
(11/64"*DRILL*FOR*10-24*TAPPED*HOLES)
N7G91G30Z0.0M19
G90T7
[Code].....
So i figured id see what the pros could tell me. I have a couple good links, one for a regex cheat sheet but i just dont have a very good understanding of regex.
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Mar 19, 2012
i want to create an application for inserting blocks from vb into cad,
i want a form with buttons on, the buttons will have the block names on, when you click
on the buttons the blocks will go into the drawing that is open
because i am new to this i dont no where to start
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