I am making a simple program that encrypts a text file and then decrypts it: why i get an error when i use this
Public Class Form1
Code:
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
System.IO.File.Encrypt(TextBox1.Text)
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I'm working on a new project, it's a console application that encrypts and decrypts files. I've only made two commands in the prototype (help & clear).
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1) I'm sure this command readings can be done in a more efficient way, but this is the only way I know.
2) I want to make this as a console application because it looks cooler than a ordinary form application that I normally use.
I have this Quiz software that lets you create online multiple choice quizzes which are great for studying (I am in grad school and I'm trying to use everything I can to learn). So the Quiz software is great but it only lets you input questions by hand, one by one. I took a look at the .xml file that the quiz program spits out and came up with the idea to try and make a converter so that I can import many questions at once. I was hoping to try and solve this limitation by doing the following:
Take a .doc that say a tutor gives us with a bunch of practice questions, and then take that into Crimson Editor, and then format it so the question is on line 1, the multiple choice answers are on lines 3,4,5, and 6, (for the next question, the question would be on line 11, and the answers on lines 13, 14, 15, and 16, and so on) and then take that saved .txt file into my program, hit the generate button, and it will spit out the .xml file, and then import that into the quiz software to generate the online quiz.
Here is an attached screenshot of my program layout so far:
I figured out how to open a text file by watching simple youtube tutorials, but I don't know how to have it generate the stuff and have it show up in the bottom text box. I know how to do the coding to convert the txt to proper xml code but I don't know how to be able to save the contents of the bottom text window to an xml file.
Im learning Visual Basic 2010 on my programming class and we reached the part of file handling. Here i tried to make a simple program that can create a text file with the content of what i type on the textbox, basically i create the file if it doesn't exist, and if it already exists i append the content to it. Once the file is saved i can read it using the "Open" button. Unfortunataly, whenever i try to create the file, the compiler gives me an error saying that it cannot modify a closed file, although i've followed up the execution instruction by instruction and i can't find the error.
Imports System.IO
Public Class Form1
Dim body As String
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okay so i was thinking of making a program that can take a text file filled with code so the text file would look like this
Title{Text = blah blah; text = blah blah; Title2{Text = blah blah blah; text = blah blah blah;} }
and have the program display
Title
Text = blah blah
text = blah blah
Title2
[code]...
I'm trying to do an encryption program that encrypts with AES256. I have searched for source codes, but I could not find proper result. Most of programs use Rijndael as algorithm, but I don't want using this class. I searched MSDN for AES classes, and I found AESCryptoServiceProvider, but I don't know how to use it.
View 4 RepliesAlright, So ive returned to using vb after several years now. Ive programed in VB6.0 years ago and I was quite proficient at it. However after returning to vb (now using Visual Studio 2010). Either Ive forgotten everything, or something has changed. For a university project. Im trying to write a program that takes a string of bits and encrypts it using DES Encryption.
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Need to design a program that can encrypt and decrypt messages stored in simple text files using a private key stored in a separate file. Software should also be able to allow the users to enter simple messages that either displays the encrypted or decrypted message. The encryption method should use a simple substitution method. It should be set out in the following format:
Example (the "@" is the separator):
@
The character The Code End of line
A @ 4gh EOL
B @ 84!9 EOL
Has to use the 256 ASCII character codes. The separator will be used to separate the character and its corresponding code.Here are the pseudocodes I have come up with:
� Read any private key file
separator = readline(file);
while not EOF(file) do
tempStr = readline(file);
[code].....
I have been tasked with making a program that combines text files.. okay.. easy enough. Problem is now I have been asked to make the same program start from the second line of the text files to get rid of headers. I am currently using StreamReader to do this but not sure how to make the reader "line feed" before it reads the data. Any help would be much appriciated. Current code below..
Private Sub BackgroundWorker2_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker2.DoWork
Dim writer As StreamWriter = New StreamWriter(Environ("userprofile") + "\Desktop\CombinedFile.txt")
Dim files As String() = Directory.GetFiles(TextBox1.Text)
Dim filename As String
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My "Learn Welsh" application is now near completion, I only have a few things left to add / fix then I will share it with the world. Here's a screenshot of it so far :
As you can see by the picture above, I have created a simple feature in my application to pronounce letters from a word to assist users to learn the welsh alphabet. What I would really like to do is make the program pronounce full words. I already know how to make use of the system.speech reference in vb, here is a quick sample of code:
Dim speak As System.Speech.Synthesis.SpeechSynthesizer = New System.Speech.Synthesis.SpeechSynthesizer
Dim word as string = "hello"
speak.Rate = 1
speak.Speak(word)
Now what I'm looking to do is make use of a welsh based voice and make an application like the one below:
I'm looking to create a simple program with 1 text field, 1 button, and an area to display what is happening and if there were any errors.My goal is to be able to delete user profiles stored on a network drive by simply putting in the users ID and hitting the button.I'll use my own id as an example:If I put mdesieno in the txt box and hit the button, I'll need the button to map to the network drive and delete mdesieno.corp and mdesieno.v2 I would like the bottom half of the window to display text like:
"Deleting User Profile mdesieno.corp" SUCCESSFUL
"Deleting User profile mdesieno.V2" SUCCESSFUL
To me this seems pretty simple, but as I said, I do not know VB yet. Is there code out there that is already written to do something like this?
I have a dbase.txt file with some data in it. i.e -
Institution Course StudentID
XZY ABC 2010-1111111 "the spaces between columns is one tab space"
XYZ ABC 2010-1222222
XYZ ABC 2010-1333333
I want to perform simple SQL like operation - i.e -
SELECT * FROM dbase.txt or
SELECT Institution FROM dbase.txt WHERE StudentID=2010-1111111 and an insert operation like -
INSERT dbase.txt VALUES (XYZ ABC 2010-1444444)
I have written some code which is not even closer to what I mentioned above. My program can read only the whole text file. There is a menu, but not functioning well, as well as my write function which is not working at all.
Below is my code -
Imports System.IO
Module Module1
Sub Main()
Dim intInput As Integer
Console.WriteLine("Main Menu")
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Getting a vibe that my VB is cursed. All I want to do is load a textfile and have the text appear in TextBox1 But no. I have looked at 3 different tutorials and I have tried copying their code word to word but still!
Public Class Form1
Private Sub ImportToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ImportToolStripMenuItem.Click
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And it gives me the following errors:
Error1Character is not valid.C:\Users\Saurabh Sharma\AppData\Local\Temporary Projects\WindowsApplication1\Form1.vb1067WindowsApplication1
Error2'daText' is not declared. It may be inaccessible due to its protection
CODE]...
how to make a simple calculator using vb?
View 11 RepliesI want to make a simple key logger in VB.Net in console mode which runs on background. So, I m not getting any logic, how to made it.
View 10 RepliesThe login box is the first box to appear, but after I successfully enter the right username/pass combo it goes to the next form, but the login form stays open as well? I've tried doing this:
Private Sub OK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OK.Click
Dim username As String
Dim password As String
[code]....
However, after I click Login it closes down both windows. I've also tried LoginForm.Close() but that comes up with an error.
I recently made a simple pseudo-encryption program that changes each character into another. It is capable of encrypting and decrypting a string. This can also be done to any text file as well. The characters range from ASCII 32-254 (This on it's own may be an issue because of #127 being DEL).
Because I believed my own coding may be at fault, I attempted this with Triple Des with identical results.For Triple Des, the requirements for en/decryption was:
Encrypt: String to Byte
Decrypt: Byte to String
And to change them either direction, I used UTF8. I also attempted ASCII and UTF32, but I don't know what I should do. I am considering dropping this but I want to learn problems like this because I am currently in college and haven't started my core classes for programming yet and want the head start.
The point where I have come into a problem is attempting to do this to another file type like an image. I looked at the results from encrypting then decrypting and the results were similar, but it seems file encoding must be the culprit.
I'm making a builder for a simple ftp client, but i have a problem.I have readed a tut about a builder with a stub, thats done but i only can fill in 1 form, but how can i make that my builder fills 2 forms in the client?
My code in the stub is:
Dim options(), text1 As String
Const FileSplit = "@vorfin@"
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
FileOpen(1, Application.ExecutablePath, OpenMode.Binary, OpenAccess.Read, OpenShare.Shared)
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I'm making a simple HEX Editor with VB 2010. As a result I am trying to automatically leave a DataGridView cell after entering two characters and move onto the next cell
View 1 RepliesIntroduction[INDENT]Since this is my first thread in VB.NET forum(most of the time, I was in C/C++ forum), I want to share something that you might find it useful with your school project or with your works.Button is already a MUST-HAVE element in every program (I couldn't imagine program without a single button would function). Because it is everywhere, its appearance affects your form's appearance greatly. Some people might not care about how their software looks, but to me, it is a very important aspect for my software.
NOTE: I am pretty new to VB.NET myself. If there is any mistake, please correct me.
[/INDENT]
Step 1: Creating UserControl and Essential Properties[INDENT]Creating UserControl into your project. Then imports the following:
Imports System.ComponentModel
Imports System.Windows.Forms
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Because UserControl already has BackColor and ForeColor properties, you only need to construct Text and BorderColor properties
Private _BorderColor As Color '' Button Border Color
Public Property BorderColor() As Color
Get
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I want to catch the text from an html page.. you know that when you open any html page in the browser, you will see a text but with formatting.. because it's an html code having a lot of tags...
how to get the text from an html page and ignore all formatting and html code?
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I am trying to read/write a simple text file in net 2008 but can't, as yet, get it to work. This is how I use to do it in VB6
Code:
MyStr = App.Path & "DataData.txt"
Open MtyStr For Input As #1
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I have a simple text file containing a list of names that I wish to sort. I was hoping for something simple like:
System.IO.File.ReadAllText("MyFile.txt")
System.IO.File.Sort("MyFile.txt")
System.IO.File.WriteAllText("MyFile.txt")
or something like that. Didn't want to actually write a bubblesort/quicksort routine myself.
I would imagine the routine would just rewrite the final file or would I have to make a new file and copy the contents back to the original?
Hi, I need to program a simple Web Browser that can search for keywords and store relevant data in another file.I am facing a problem with authentication, mainly cookies and maintaining a session.So I read that Web Browser Control is based on I.E.? So may I know how are cookies and session handled?Do I have to implement them manually or are they stored and retrieved from the same folder as the one used in I.E? If so, if I delete the I.E.'s cache, am I also deleteing the cache of any Web Browser I make using Web Browser Control?
View 2 RepliesI have managed to access and read a specific file line by line. If I wanted to split information by a comma or space and then sort alphabetically or numerically, how would I go about this procedure? Would I create a loop within the reading loop to parse the information?
Dim file As String = "C:Users est.txt"
Dim Line As String
If System.IO.File.Exists(file) = True Then
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I am Really Interested in Learning How to Code in Vb With Client and Servers.What should I use Tcp/Ip,Winsock? any Good Tutorials or Examples. How do I send a Simple Text file to A Client from the Server?
View 1 RepliesI am making a program that reads a file. Csv,and information to a textbox.
After he demand on the Csv file, the same information he writes what is in the same row forward in the same textbox.
A-dos-Francos;39.346246,-9.031105
A-dos-Negros No;39.366089,-9.090929
A-dos-Negros PV;39.366886,-9.131098
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Example: If "A-dos-Francos" is written in the textbox I want that it be replaced by "39.346246,-9.031105"
But in the same textbox.
I'm making a simple game. I want simultaneously go up and left.
Private Sub Form1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
' If e.KeyCode = Keys.Z Or e.KeyCode = Keys.Up Then
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Left, right, down and up work. now diagonal.
I'm new to .net. I would like to know how to convert a text data in string or in a file into a simple byte array[ ] format.
View 3 RepliesIs there a simple ASP.NET (.VB) available for AES-encrypting?here is a link to c# one but its complicate one having pretty much parameters, for example salt. [URL]I need a simple one that works together with GOOGLEAS3 Class that is called easily like this:
var key:ByteArray = Hex.toArray("1234567890abcdef");
var pt:ByteArray = Hex.toArray( Hex.fromString("aaaaaaaaaaaaaaaaaaaa"));
var aes:AESKey = new AESKey(key);
aes.encrypt(pt);
var out:String = Hex.fromArray(pt).toUpperCase();
