I have a text box that accepts an 8 digit hex encrypted string and adds it to a listbox1. Then I have a button that when clicked takes the string from listbox1 and
1) reverses the string
2) subtracts 235
3) Converts it back to a 9 digit number
4) Adds it to listbox2 using the code:
Code:
Private Sub decrypt_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles decrypt.Click
[code]...
However something seems to be wrong because it get an arithmetic overflow exception. Does anyone know what happens to be wrong with my code?
I have a text box that accepts an 8 digit hex encrypted string and adds it to a listbox1. Then I have a button that when clicked takes the string from listbox1 and
1) reverses the string
2) subtracts 235
3) Converts it back to a 9 digit number
4) Adds it to listbox2 using the
Private Sub decrypt_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles decrypt.Click Dim i As Integer Dim buffer As String = ListBox1.Items(i)[code].....
However something seems to be wrong because it get an arithmetic overflow exception.
I am attempting to find some code to use in VB.NET to decrypt a string that has been encrypted using the Java crypto libary.All of the code I have found so far uses an Initialisation Vector and Key to decrypt but the string has been encrypted using the Key only. (Using an Initialisation Vector is apperently an optional step in Java).Does anyone know of code that I can use (preferably in VB.NET but i could convert C#) to decrypt AES 128 Bit encoded string without an Initialisation Vector?
I am using vb.net 2010. I have a datagridview whose data source is a data table. I dynamically add rows to the data table.
[Code]...
After adding the new row, m_table is correct. However, DVGCusClient not only adds this row, but also adds two additional blank rows at the bottom. I have no idea where these two blank rows come from. Why I use above code is as follows: Use a data grid view to display data. When a user clicks a row, another form is opened which allows user to search/input some data.When the user closes the form, all data is saved to a data table and shown on the data grid view.
I am using the method described in the following LINK and I am using the following code to encrypt:
'Page1.aspx Protected Sub butEncrypt_Click(sender As Object, e As EventArgs) Handles butEncrypt.Click Dim QueryString As String = "type=Int&pk=" & _primaryKey QueryString = Tools.encryptQueryString(QueryString) Response.Redirect(/SearchResults.aspx?Val=" & QueryString) End Sub
i came up to create my own because i need to encrypt 10character string and i want it to output also 10character string..security is not my concerned here..what i want is encrypted string is not readable by the user or is not obvious to user.. is this possible by the use of Xor method?..BTW,its better if the output is alphanumeric.
I'm working on a way to authenticate users in my app, and what I've come up with is the following method.To write to a database, the user must have an account in SQL server 2008. However, I still want people to be able to view the application if they don't have access, but only read, they can't sync any changes. This is working well, as I have a string array hard coded containing approved users:
Dim Users() As String = {"BWANG", "EDASALLA", "ERICHARDSON", "HALONZO", "JCHAPMAN", "SKIM", "PMACK"}
The one problem with hardcoding is that if I need to ever add a user later on, I'd have to release an update to the program. (which isn't hard as I already have updating built into the app, and users can still download updates even if they can't sync.)
What I'd like to do, is use an encrypted .dat file that contains the user names, and store that with the application, so that i could always be added to, and only one file would need to be downloaded.
I have code in place to encrpt and decrypt the .dat file (called users.dat) and this code works for single text entries in the file. I need to figure out how to load a list however into the array in place.
Imports System Imports System.IO Dim userfile as String = "C:users.dat" Dim Users() As String = Data.Decrypt(File.ReadAllLines(path))
Basically each line in the file will have an encrypted user name, and i want it to decrypt each line and store it back into that authorized user list.
Hey guys, I am trying to send data from client to server (encrypted) and the string sent from the client is not the same as recieved from the server. I've been killing my brain for hours to get this to work but I cant manage. Im converting everything to Base64 string.
Client:
Public Sub SendMessage(ByVal msg As String) Try SyncLock myclient.GetStream sw = New IO.StreamWriter(myclient.GetStream)
I'm using Visual Basic 2005 Express Edition and I was just wondering if someone could help me out with a few things? I'm making a Notepad-type program just to clarify things.1. I have a button which adds text to my RichTextBox1 (excuse the name), but when you click it it adds text to the end of the script. I want to make it so the text is added where your "cursor" (the blinking thing which lets you know where you're typing) is, at the current part of RichTextBox1. At the moment I'm using:
RichTextBox1.Text = RichTextBox1.Text + "The text I'm adding" If anyone could tell me the code to make it put "The text I'm adding" at your current cursor that'd be great.
2. I have a Save As button and a Save button. When you click Save As and save the file it works 100%, when you click Save and you haven't saved previously then it works 100%, but after you have saved the file and then click save it doesn't overwrite the file. Here's the code for Save:
[code]...
So if anyone can tell me the code that's needed so it will overwrite the current file 3. I have a FontDialog but I have no idea what the code is supposed to be to make RichTextBox1's font change after you click Okay in the FontDialog.
On compiling a visual basic assembly, int32 variables are cast as int64 for calls to adodb methods that require int32. This results in a method not found exceptions at run time. The unnecessary cast operation can be seen when using reflector to inspect the site of the method call and is not present in the source code.To further muddy the waters when the code is compiled on my 64bit windows 7 machine all is well, but on a 64bit windows 2008 r2 the unnecessary cast is added.
How can I create a separate class that has the function that adds dynamic text box, so that I will just call that function to my main form. I have the code below that does add dynamic text box but it is already inside the button of my main
I have a VB2008 application that uses SQL Server 2005 Exspress Edition. I was modifying my application and then decided to add a table to the mdf (named "Pipe.mdf"), which I have don many times before, but I must have messed something up when I made other changes. After I added the new table I opened the Dada Source Configuration Wizard to add the new table to the dataset and I don't see the new table to select it. However, it added a copy of "Pipe.mdf" and named it "Pipe.mdf1" to the Server Explorer.
If I delete this copy of the mdf, it appears again in the Server Explorer when I open the Data Source Configuratuion Wizard.
If I add a Table to the copy of the mdf ("Pipe.mdf1"), it shows up in Dada Source Configuration Wizard.
what to change so that the new table appears in the Data Source Configuration Wizard for the original mdf (Pipe.mdf) and not add the copy of the mdf?
Check process handle count:In Task manager, View, Select columns, mark Handle Count to the view.(The process when loaded has about 333 handles)
Operation:The new thread is set equal to an existing thread, then the existing thread is started and aborted. How does one restore the old handle count? Why do the handles increase by a random number and do not revert?
How can Idisposable/CloseHandle/or GC.collect, Finalize() work in this situation? I'm trying to return the handles to their original count, 333, when I start a new thread it adds 4,5, or 6 handles per new thread(even if the thread is aborted and set to nothing).
I'm new to VB and trying to convert numbers to a string then add the string together but VB keeps putting a space at the beginning of each number after i convert it to a string.
I have list box with item priced. when a user select item and add to the cart then calculate it should display subtotal. My error is when I do it again my previous subtotal add to the next one.
this is my code
Option Explicit On Option Strict On Option Infer Off
I have a situation where I want to add penalty charges after every hour. For example if a target is not met it will start to incur penalties. So after every hour an 80 pound charge is given until it reaches the 5th hour where the penalties incur a 90 pound charge. Is there a way of doing this?
well i was trying to do a function called Procedimento() for each item in listbox1 but it's impossible .... how it can be done ? What i try until now :
Dim myItem As Object For Each myItem In ListBox1.Items Procedimento()
i am trying to decrypt a file that was encrypted with Des. However not all of the file is encrypted just a few lines are. Here is an example of the file im trying to decrypt:
Random text Encrypted Text MD5 Hash Encryption Key(Only there for tests) Number of encrypted lines
The idea is to read the last three lines into variables and use them to decrypt the text. At the moment i use the number of lines - (the number of encrypted lines + 3) to find where the encrypted text starts. Then i was trying to copy the encrypted text to a temp file so i could run the code bellow on it, however i am getting an encoding error apparently i need to be using base64 or something. So my question is can anybody explain to me or show me how i can pull the encrypted text out of the file so that i can use the code bellow on it.
Dim DES As New DESCryptoServiceProvider() 'A 64-bit key and an IV are required for this provider. 'Set the secret key for the DES algorithm.
i will like to know if it will be possible to decrypt and encrypted file in vb.net or any without knowing the form of encryption..any information on how to go by it... in that if you lose the form on encryption can it be decrypted?
I've created a console VB.Net application and encrypted the app.config file with RSAProtectedConfigurationProvider.I've used an article http:www.codeproje...eAppConfig.aspx as an example for the Encryption. It works fine in an IDE on my XP desktop.Then I deployed my application to a Windows 2003 server. The package included the app's executable along with the encrypted app.exe.config file. However, the application failed on the server with the following exception:Unhandled Exception: System.Configuration.ConfigurationerrorsException: Failed to decrypt using provider 'RsaProtectedConfigurationProvider'. Error message from the provider: The RSA key container could not be opened.I decided to encrypt app.config on the server so I copied app.config and encrypted it. The app.exe.config looked encrypted and I ran the application. However, it failed: although it didn't raise an Rsa exception as before,
have a favorite system so far with a Menustrip, however it's come to my attention it's a pretty weak way to put favorites. So here is my question how do I do it with a ListBox1? I want to put it in a Panel on Form1 (The main page) I have tabs so it may make it more complicated.My Settings Save: favList ; StringCollection ; User valueMy Address bar is called SearchBoxI want to be able to add a remove button, and a add button (obviously)I have seen tutorials for thi
I have an pdf file, encrypted with a certificate. I want to access to it in order to create a decrypted copy.I have the certificate stored at personal windows certificate store. Is it possible to use this one? How can I access with the pdfReader object?
