Occasional Bad Data Error When Decrypting
Feb 2, 2011
[Code] Here _data is a string containing the encrypted value. m_transformDec is the Decryptor created previously. Usually this works. Occasionally, I get a "bad data" error. I print out the value of _data, and it is always the same. The code is multi-threaded, which I suspect is the reason for both the problem, and it being hard to reproduce. The decryptor is created in the creation of the class, and the decryption is done in a Shared function, but I don't see anything there which is not thread-safe. Any ideas?
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May 30, 2011
I have a datagridview bound to a datatable. I update the datatable quickly and constantly (each row updated multiple times per second).
column value of particular row is updated manually by setting properties in the contained items..
DataGridView1.Rows(index).Cells("col1").Value = message
Error : Index was outside the bounds of the array.
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May 16, 2010
I am encrypting a file with this code.
[Code]....
Error #1 Encrypt works but decrypt does not. This is b/c the file extensions in TextBox1.Text is .txt and it is looking for .enc Error #2 If I enter in the file.enc the file will be decrypted but it will have the file extensions .dec. How can I copy the extensions (.txt) and replace the .dec after it was decrypted.
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Aug 30, 2010
I am developing a fairly comprehensive Excel add-in, applying a lot of ops. Take a workbook, save under new name, apply actions (add names, change formulae, etc). Generally it works fine, but from time to time .Net throws an InvalidCastException on virtually any of my CTypes. When I acknowledge the error and run the code again (without quitting Excel) on the exact same Excel workbook, no error occurs. The InvalidCastException occurs maybe in 40% of all tries, otherwise the add-in succeeds.
[Code]....
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Mar 8, 2012
Let's say a create a new project consisting of form1, sized at 400x400.I add a datagridview box of say 350x350 in size.Now that looks fine when the program is run. Except if the user increases the size of the window - or even worse maximises the window on a high res screen. Now my lovely 350x350 datagridview box looks silly on the huge empty background.Is there a way to set the datagridview box to increase in size automatically as the window grows?
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Dec 11, 2009
There are many algorithms for encryption in internet. But i found them more complex. I want simple and powerful algorithm for encryption and decrytion of text.
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Nov 22, 2011
Im a Uni student and im having probs with encrypting an image and also the contents of a folder. I have successfully encrypted and decrypted a text file using the following code below.
If anyone could take a look and advise on how to alter my code to perform the task of selecting an image or folder and encrypting it and decrypting it via a secret key that you input within a textbox,
[Code]...
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Sep 29, 2011
I downloaded AxCrypt and encrypted a pdf file. It creates an executable that self decrypts the file if the correct password is entered. This is what I need except that I have to email this self decrypting file - and we all know that exe files get blocked. Are there any self decrypting methods out there that do not use an executable file?
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Apr 5, 2009
I am trying to setup so a user can subscribe to my forums. When he/she does so, it puts them in the nec. group on the forum. This is all easy. Note: I am the owner of the site and the mysql db. So this isnt to decrypt them on other sites.
In short, all of my software will require a login / password to use the programs.
Now, on the mysql, the db encrypts the passwords. How would I go about decrypting it? I read somewhere that its a one way encryption. If this is the case, how does the site know if the password is right or wrong if it cant decrypt it?
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Mar 31, 2009
i'm making instead of having the game save as regular text i wanted to mix it up a little. So, i took a bunch of special characters and assigned letters - A-Z and numbers 0-9 - some special characters per character. Anyway, when i 'encrypt'(not really encrypt) the text it works fine. But when i go to change it back.. that's where nothing happens.[code]The code for when i change the regular text into special characters is the same thing except backwards.I would rather not post the project since it's part of an even bigger project.
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Jul 12, 2011
I'm writing a program in Basic where users can select a File using OpenFileDialog, then using a Dialog with two textboxes as the way to set the password to encrypt a file. I'm having trouble getting the program to require the password to open the file.
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Sep 13, 2011
I have a program and I want to make it so you need a specific key to use it. I want to store keys in a text file and also use encrypt strings from my program to a text file.
I'm using Visual Studio 2010 Ultimate and programming in Visual Basic
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May 13, 2012
I've been messing around with cryptography lately and wanted to figure a way to encrypt an exe so it's not runnable then decrypt it back to it's original state. I found a tutorial online that teaches how to do this with a text file so I figured I'd just tinker with that and try converting it for use with executables. For some reason though after I decrypt the encrypted version it doesn't run and gives me the error:^I'm running 64 bit windows but I'm pretty sure this wouldn't work on an x86 system either.
Imports System
Imports System.IO
Imports System.Security
[code].....
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Aug 16, 2011
I have encrypted a user inputted value and successfully stored it in the Windows Registry. Now I am having problems Decrypting that RegistryKey when my Form starts up and making sure it is the same key that was originally stored. My decrypting code has been working but if I go inside the Registry and add an extra character on to that keys value, my program is still running.. It is not supposed to run if that RegistryKey is not the one that was originally user inputted..[code]And I also have tried A LOT of other examples, but I am not going too post them all. So is there anyway I can check if a RegistryKey exists and Decrypt it to make sure that it has not been changed on my programs startup?
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Sep 6, 2010
Trying to decrypt a textfile is giving me an error: The input is not a valid Base 64-string as it contains a non-Base 64 character, more then two padding characters, or a non-white space character among the padding characters.Besides that I also get an exception while debugging: A first chance exception of type 'System.FormatException' occurred in Fenix.exe When I start the app it opens the file and tries to decrypt it. After decryption the string is send to a label, so I can read it. The codes I used:
vb.net
' encrypt the file Private Function Encrypt(ByVal strText As String, ByVal strEncrKey As String) As String Dim IV() As Byte = {&H12, &H34, &H56, &H78, &H90, &HAB, &HCD, &HEF} Try Dim bykey() As Byte = System.Text.Encoding.UTF8.GetBytes(strEncrKey) Dim InputByteArray() As Byte = System.Text.Encoding.UTF8.GetBytes(strText)
[code].....
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Nov 15, 2010
In the UI of my winForm I ask the user for a user name and password. I store this password as text in the Settings (the .settings file) of my project. The app is a visual Studio Add-in How can I encrypt and decrypt the password before and after I enter it into the Settings file? I don't really need anything fancy. It's just a little in-house app. But I'd like to know all my options
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Jun 29, 2010
i want to make some simple program for encrypt / decrypting message using VB, my problem was when i want to decrypt the message, the result was incorrect,
Code:
Dim decryptor As Integer = TextBoxhasilencrypt.Text
Dim privatekey As Integer = Labelprivatekey.Text
Dim modulus As Integer = LabelModulus.Text
[code]....
the logic error on the program was when the "power of" are odd
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Jun 22, 2010
I'm writing an application that imports and tidy up address data into a cleaned, deduped excel workbook ordered in rows with each column as an address field. One of the issues I've ran into is that we sometimes get a workbook where the multiple address fields are held in a single cell with line breaks. I've written code to extract all of this data out of the excel sheet in to a dataset with each sheet as a table and the address fields contained within. I now want to create a new Excel workbook from this data with the address fields in Row and columns the problem I have is I can Open/create the Workbook but when I try to insert a new Sheet (Table) I get an error saying the Workbook is read only....
Private Sub MakeSimpleXL(ByRef DsTemp As DataSet)
Dim dsTable As Data.DataTable
Dim tblName As String
Dim dsRow As Data.DataRow
[CODE]...
Here is the error: System.Data.Odbc.OdbcException: ERROR [42000] [Microsoft][ODBC Excel Driver] Cannot modify the design of table '3 _ 10$'. It is in a read-only database. at System.Data.Odbc.OdbcConnection.HandleError(OdbcHandle hrHandle, RetCode retcode) at System.Data.Odbc.OdbcCommand.ExecuteReaderObject(CommandBehavior behavior, String
[CODE]...
It looks to me like it is trying to create the table (Sheet) but has the workbook opened as read only....
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Jun 22, 2010
I can't get past this error in my loop through the data reader specifically dr(12). I tried adding .To String but that doesn't seem to work either. Can someone help me with what need to do so it can read even if there is a Null value. My code is below:
While objDataReader.Read()
'Set up DataRow object
Dim dr As DataRow = DataReaderTable.NewRow
[code].....
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May 4, 2010
I have this code which populated my form;
Private Sub populateprojdetails()
Dim cmd As New SqlCommand
Dim conn As SqlConnection = GetDbConnection()[code]....
The Error I receive is "Error converting data type varchar to numeric".
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May 6, 2009
Error: MySql.Data.MySqlClient.MySqlException: #42000 You have an error in your SQL syntax
[Code]....
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Sep 2, 2011
I've spent a substantial amount of time trying to figure this out, but I keep getting the same error
A first chance exception of type 'System.Data.OleDb.OleDbException' occurred in System.Data.dll
A first chance exception of type 'System.NullReferenceException' occurred in project1.exe
This happens when I try to use the DataReader.my code is
Public Function Identification() As List(Of Integer)
Dim returnIndex As New List(Of Integer)
Dim dbCount As String = "SELECT Bookingid FROM bookdetail WHERE Date =" & getCurrentTimeString() & " 12:00:00 a.m."
Dim count As Integer = 0
[code]....
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Jan 26, 2009
i am trying to connect to an MS Access database and I am getting an erro message on the following line of
searchtable_command = New SqlClient.SqlCommand(searchtable_string, testsearch_connection)
Error:'System.Data.Odbc.OdbcConnection' cannot be converted to 'System.Data.SqlClient.SqlConnection'.
Here my connection string:
Dim testsearch_connection As New Odbc.OdbcConnection("Provider=MSDASQL;Driver={Microsoft Access Driver (*.mdb)};Dbq=C:CesarAccessdatabase.mdb;Uid=admin;Pwd=;")
What am I missing?
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Jan 27, 2010
Do While rdr2.Read()
Dim var1 As String = rdr2.Item("Week").ToString
Dim var2 As String = rdr2.Item("L1").ToString
Dim var3 As String = rdr2.Item("L2").ToString
It generates the following error: A first chance exception of type 'System.Data.SqlServerCe.SqlCeException' occurred in System.Data.SqlServerCe.dll
Interestingly, if I use a numeric value for the variable it for LSArraytemp, it writes to the database no problem at all.
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Mar 31, 2009
I have the following piece of Code in my application shown below,
Try
Dim Oracle_num As New System.Data.SqlClient.SqlCommand(("SELECT Oracle_no FROM gprdsql.TblOracleNos WHERE Prac_no='" & _
[code].....
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May 26, 2011
I am trying to deserialize my data and I keep getting an error.I'm hoping for any ideas of what could be the problem.My code in Visual Basic Express 2010:Imports System.Xml.Serialization
Imports Systm.IO
Public Class Form1
Structure gro
[code]....
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Dec 1, 2011
I have MSaccess database.I have 2 tables 1) CUSTOMER TABLE=----CUSTOMER ID-Primary --AUTO NUMBER2) ORDER TABLE =----(CUSTOMER ID--Foreign KEY) Now From the front end using VB.net I have an page in which if i enter Customer details and press button add .I have to INSERT into values into CUSTOMER TABLE and I Also at the same time INSERT into ORDER TABLE with this CUSTOMER ID which i generated now.How is it possibl
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May 30, 2012
This error occures when I try to load my data into a datagrid with btnTonen or frmLoad after starting up the program. But after I do something else in the program the data will acctually load when I click btnTonen.
Private Sub btnKlantTonen_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnKlantTonen.Click
Dim strSQL As String = ""
strSQL = "SELECT * FROM tblKlanten ORDER BY fldKlantNaam"
[code]....
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Mar 2, 2010
I'm trying to load data into a DGV row at a time from a dataset and keep getting the following error on the highlighted line.
Private Sub LoadClientGrid()
Try
grdClientList.Rows.Clear()
For Each row As DataRow In rsClientGrid.Tables("tblClients").Rows
Dim grdRow As New DataGridViewRow
[Code] .....
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Dec 4, 2011
I have a code here which is to insert values in both the tables which has Relationship.[code]...
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