VS 2008 - Vigenere Cipher - Proceed On If Cipher Text Is Longer?
Jul 14, 2010
Vigenere Cipher which I am trying to code in VB.Net. The main thing is to decrypt to plain text with keys provided. Currently, I did a small code to decrypt NIOZS to COMPU with the key LUCKY. This is done by storing the cipher text, the key text and the English alphabets in 3 different arrays each starting at index 0.
However, I do not know how to proceed on if my cipher text is longer. My cipher text file consists of texts in .txt, every 5 words are group together (e.g. NIOZS ECPQE TOGCG YMKQF E). The keys are all different in lengths. I also understand about checking letter frequency to deduce the key but I do not know from which point to start on.
Can anyone give me some pointers as to how I can get to start for my program? I tried looking for samples but some applets on the web wasn't exactly accurate or I can't start it up after I dl-ed.
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Nov 10, 2011
I am making a cipher solver in vb.net 2008 and I have made it solve ciphers for most ciphers but I can't make it do vigenere. I have got three textboxes named "EncryptionVigenere", "SolutionVigenere" and "Key" and a button called "SolveVigenere".
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May 10, 2011
Alot for the algorithm for Feistel cipher ( block ciphers ) but I did not find any . .
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Nov 15, 2011
I'm writing an alphabet cipher that ciphers at random. It looks like it should work when I'm debugging it but when I look at the cipher key it comes out with duplicate letters like some of them weren't switched during the for loop. WasSwapped is used to keep track of whether the letters been used in the cipher already and alphabet is just a list of the alphabet in order. All arrays and lists are size 26.
[Code]...
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Nov 25, 2008
I'm trying to make a program (in VB 2008 Express Edition) that will take text (from a textbox) and then switch the letters (say a->f and A->F) and will put the result into a second textbox when I click a button. How do I code the program so that it will search through the textbox and find all of a certain letter (say a) and replace it, then search for the next letters (say b-z) and replace them?
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Sep 7, 2009
I am trying to write a program to decrypt and encrypt the ceaser cipher or ceaser shift (which ever you prefer using), and I really need help I don't even know how to start. I am hoping that someone on here can atleast help me to get started with writing the program.
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Sep 28, 2011
My problem is ComboBox, with the text of the first item longer than the combo - I don't see the text from the start, I see the end of the text. I wanna see text from the start. I've tried 'SelectionStart' property set to 0, but it has nothing to do with my problem - it only sets where from text is selected.
[Code]...
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Dec 2, 2010
There shouldn't be any problem whatsoever right?
VBScript_RegExp_55.RegExp
and
VBScript_RegExp_55.MatchCollection is gone
VBScript_RegExp_55 name space is still around but only contain interface globalObj and errObj.
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Jun 5, 2010
Recently I uninstalled and reinstalled Visual Studio 2008. Before that, Visual Studio compress images that I put in the Resources folder. In this folder I put images in PNG format for use in the project. When I was compiling the project, the executable was of a size much smaller than the sum of the bytes of the images as they were compressing in the compilation. The sum of the size of the images gives a 47MB, and the file compiled with the images was around 3.5 MB. But now the images are not compressed. For the resulting executable with the build is about 48 MB ... I'm deducing the problem is because the images were not compressed ...is it so?
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Dec 18, 2009
I have been developing an async socket connection server and client program. I have been testing it, and noticed that if I connect to the server from my client and then disconnect. Upon reconnecting I am on a different port(local IP still). This is fine, however when I go to send a message, and the server trys to update all the clients, it eventually hits clients that do not exist anymore. I get the SocketException 10054, and upon connecting/disconnecting enough, it no longer works at all. My question is how do I clear out these no longer useful sockets from the server? I am doing currentsocket.Shutdown(SocketShutDown.Both); and then a currentsocket.Close(); after that. When a user disconnects.
[Code]...
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Apr 5, 2009
I am using a label to display a song for an mp3 player. I wanted to scroll the text inside the label for anything that is longer than the label width. I figured out the width of the label and if the width of the text inside the label is longer. But I have no idea how to turn this into subtracting parts/pixels of the text currently displayed and how to append the subtracted parts to the end of the new text.
Sub f1timer2tick()
Dim g As Graphics = f1l2.CreateGraphics
Dim s As SizeF
If f1l2.Text.Length > 19 Then
[code]....
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Nov 11, 2011
Is there any way to detect if the text in a label is longer than the label itself (assuming autosize is set to false)? I want to trim the text in a label so the last line is a finished sentence (everything after that sentence is removed). I hope you understand what I mean.
I want to go from this:"Hello. This is a test string. Most test stri..."
to"Hello. This is a test string."
Is there any easy way to do this?
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Apr 14, 2010
I am beginner in programming and developed an application of mine. Although, I am finished with the coding part, but I have to present my software architecture diagram. I am not a software engineer and so familiar with basics of software engineering, layering etc.I have used 1) .NET GDI Graphics in my application, 2) Text to Speech, 3) RichTextBox which retireives pictures etc. How do I proceed with the architecture diagram now?
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May 28, 2009
I need some guidance on the best way to proceed with searching a file content.I have a large file (see attachment) that is in text form, some of these files could be upto 50 times as big, therefore creating a huge file.These files contain information that is produced from another application and therefore I am unable to change the format of the file.This file contains information that I want the user to be able to be able to enter search criteria in a form that then searches this file and returns information. The individual information is split into sections of data and this is defined by the section start label lbl{ and the end label }} Therefore the below information highlighted in bold is an individual section
lbl{-32768 21 12 0 text {Equip no: P-102BDescr 1: RECYCLE PUMP-BDescr 2:}}lbl{-32768 21 28 0 text {Equip no: D-100Descr 1: COLUMN RECIEVERDescr 2:}}Now comes the hard bit, in the bold section above you will notice that there is some text Equip no: P-102B I want the user to be able to enter in a form *102B* and for it to return -32768 21 12 0 which is after lbl{ and before text.Now obviously I could loop through the whole file to do this, however I am very concerned about RAM usage and also the time it will take to do this. Obviously the user could use this search option over and over again and therefore we would be searching the same file over and over again. One of my thoughts was to read the file once and output the content in an Access Database table and then use SQL to get the information? However would the user require Access on there machine to be able to do create the database or could I just ship a blank Access database with my app and then copy this and populate? Also I am not sure if Access is the best database, obviously I don't want people to have to use Oracle of SQL as this would require server configuration etc. but are there better free databases out there?
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Mar 6, 2009
I am suppose to do a VB form where it can be able to read, add, update and delete citectSCADA variables from access .But after entering the following code into my add button. my form jus hang.i tried F11. But still it didnt tell me the problem about it.VB
[Code]...
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Jun 27, 2012
I am doing a Quiz form on VB.net . How to proceed on to the second question using the same form . I have linked the database to it so now my form1 is the first question . I need to save the answer and proceed to the second question using that same form
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May 28, 2009
I need some guidance on the best way to proceed with searching a file content. I have a large file (see attachment) that is in text form, some of these files could be upto 50 times as big, therefore creating a huge file. These files contain information that is produced from another application and therefore I am unable to change the format of the file.
This file contains information that I want the user to be able to be able to enter search criteria in a form that then searches this file and returns information. The individual information is split into sections of data and this is defined by the section start label lbl{ and the end label }} Therefore the below information highlighted in bold is an individual section
CODE:
Now comes the hard bit, in the bold section above you will notice that there is some text Equip no: P-102B I want the user to be able to enter in a form *102B* and for it to return -32768 21 12 0 which is after lbl{ and before text
Now obviously I could loop through the whole file to do this, however I am very concerned about RAM usage and also the time it will take to do this. Obviously the user could use this search option over and over again and therefore we would be searching the same file over and over again.
What I am wondering is if anyone has an idea on how best to do this?
One of my thoughts was to read the file once and output the content in an Access Database table and then use SQL to get the information? However would the user require Access on there machine to be able to do create the database or could I just ship a blank Access database with my app and then copy this and populate? Also I am not sure if Access is the best database, obviously I don't want people to have to use Oracle of SQL as this would require server configuration etc. but are there better free databases out there?
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May 18, 2009
i'm working on a simple drop down button. all the stuff i tried with context strips ended up misplacing the menu in all the wrong places, so i'm doing a dropdown button with a combobox and a button placed infront of the combobox but not the comboboxes arrow click. what i would like, is to click on a item in the combobox and proceed with command, instead of having to click a go button or such..
also, is it possible to fully customize a combobox? trujade..so much work to do and so many choices to choose from...
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Dec 1, 2010
I am new to vb .net and I have been writing simple programs in VB4(16 bit) and now I have to convert a particular program to VB .Net. I have never really used the Crystal report in vb to write my reports and I am really lost as to how to proceed with converting the following module to .net equivalence.
[Code]...
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May 21, 2009
how do i have my app read a line from a textfile and if that line equals "whatever" proceed with command, this case a msgbox.so much work to do and so many choices to choose from...
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Jun 3, 2009
i have a checkbox, when checked, contextmenu shows and remains visible until unchecked.. then i ran into a problem.. if i click any other control on my form, the context menu disappears and the checkbox remains checked. i have tried placing
[Code]...
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May 19, 2009
i'm having a little trouble with a listbox. [Code]. i want the button command to run through the listbox items and proceed with given command. it's not listbox1.items.indexof(#), it's something else i'm missing.
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May 22, 2009
Try
Dim s As New IO.StreamReader("C: est.txt")
For i As Integer = 1 To 4
s.ReadLine()
[code]....
this only reads one line and proceeds with command.. how can i fix this to be able to read multiple lines, like read line 7, do command, read line 9, do command, etc..so much work to do and so many choices to choose from...
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Jun 14, 2012
Quick question - if I have a timer set to 5000 (5 seconds) and the code in the timer takes longer than 5 seconds to run because of sql stuff, will the timer wait until the code is done till it fires again?
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Jun 5, 2011
If a subroutine is called within a function, does the function always wait until that subroutine is completely finished before it will proceed with the rest of the function? If so, is there any way to make it not wait and continue on with the rest of function and not care what happens in the subroutine?
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Apr 14, 2010
I haven't touched a project in about 8 months. It's ongoing for work, but hasn't really been published fully so it gets worked on in my spare time. I went to recompile and the build failed. It had previously worked. I can't figure out why. Part seems to be due to AxOWC11 being recognized, but it shows up in the namespaces. I'm looking for the .dll that shows up as AxOWC11.dll, but I'm not seeing any. I do have one that shows up as AxInterop.OWC11.dll and I do have just a OWC11.dll in my list. I've posted some of the errors below.
Warning 1 There are updated custom wrappers available for the following referenced components: Graph ,MSComctlLib.
Warning 2 Interface 'IOleCommandTargetArgument' is marked as [dual], but does not derive from IDispatch. It will be converted as an IUnknown-derived interface. PE Files
Warning 3 Interface 'IAddinClient' is marked as [dual], but does not derive from IDispatch. It will be converted as an IUnknown-derived interface. PE Files
Warning 4 Interface 'TextFormat' is marked as [dual], but does not derive from IDispatch. It will be converted as an IUnknown-derived interface. PE Files
Warning 5 Interface 'ViewSurface' is marked as [dual], but does not derive from IDispatch. It will be converted as an IUnknown-derived interface. PE Files
Warning 6 Interface 'IPivotCopy' is marked as [dual], but does not derive from IDispatch. It will be converted as an IUnknown-derived interface. PE Files
Warning 7 Namespace or type specified in the project-level Imports 'AxOWC11' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases. PE Files
I'm on a machine with Windows XP using Visual Basic 2008 Express Edition
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Aug 10, 2010
I have an application with several forms. The form Main.vb has always been editable in the designer. However, this has changed. The icon in front of the name has changed to a module icon, and the designer and code are no longer found. When I run the application, it still functions as expected.
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Sep 18, 2009
I am trying to add records from an Access Database into another Access Database using DAO recordset.The VB.NET program would add the records until it hits random stop and error says "Object invalid or no longer set". what would cause this? The recordset contains 7 million records, but it only added approx 6000. Next time i run the program, it would add different number of records again.
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Aug 19, 2011
I think I have accidentally changed something in the properties of a form, but I am receiving this error now, and none of the 4 forms will load.
System.InvalidOperationException was unhandled
Message="An error occurred creating the form. See Exception.InnerException for details. The error is: InvalidArgument=Value of '52' is not valid for 'index'.\r\nParameter name: index"
Source="WindowsApplication1"
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Apr 28, 2012
I have run into a small little annoyance while writing a program. I have a bunch of controls on the form and while trying to figure something else out they all got parented to another control, using undo I unparented them from that control however now when the control is clicked the code that is in the sub for them does not run at all. If I double click the control it generated an entirely new sub with a number i.e. what was "Private Sub NumericUpDown1_Value Changed" becomes "Private Sub NumericUpDown1_ValueChanged_1".Near as I can figure the subs with the code are no longer associated with the controls.Is there a quick way of fixing this or am I stuck copy and pasting the code from each sub into a newly generated one?
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