I am building a small office application that requires users to log in dont need encryption or other sophisticated aproaches. all i need is an array of passwords that users can log in.
So If passtext.text= "test" or "test1" or test2" then
else
msgbox("Fix password")
First off, I am a total VB noob. I want to create a program so that I can store usernames and passwords. I want to be able to search by username and pull up their password. What VB program do I need to write this? Can I just use the VB in excel?
View 9 RepliesI know its a very basic problem but what is the best way to store passwords and usernames in visual basic 2008? I need to be able to add them whist in runtime and I also need to be able to obviosly get the program to check wether inputted username and passwords are correct.I am VERY new to programming so please explain your answeres in dummy language
View 8 RepliesCan someone tell me how Active Directory stores it's passwords for users? Is it like this answer : storing passwords in SQL Server Is it a hash and a salt or multiple hashes?
EDIT I ask because I want to mimic the way they store them for a custom authorization application I want to build. Or if someone can offer a existing framework or class that handles user authorization for a web application. If I can use asp.net membership for multiple applications using web service that would be even better.
I have a scenario that has been troubling me for years. If you have to connect to a database or other service (like a web service) using a username and password, where would be the safest place to store this information if you are connecting through a .NET assembly? I understand that you would have to encrypt the password, but then you run into a kind of chicken-egg problem -- fine -- you can encrypt it, but then where do you put the key?In .NET, you can't hardcode the password because you can decompile .NET code.
I looked at using assembly based rights with Isolated Storage, but MS recommends against storing unencrypted secret items there because priveledged users can gain access, so again, we are moving the problem from point A to point B. So for examplem, a domain admin with no need to know about the information in a database would be able to get access because of the ability to be an admin on any workstation on the domain.You can encrypt App.Config and Web.Config, but I believe priveledges users can access the keys. I think you run into the same problem with DPAPI.
I had considered storing the passwords, encrypted in a remoted database and getting them through OS authentication, but our department prohibits the storage of passwords on database servers. I am pretty sure I am stuck and wanted confirmation.
Basically i am trying to create a programme, which needs to have some authorisation.
When the application starts up, it starts straight into the login screen.
I want the Username and Password textboxes to read the database and if they match then progress to the next form but if they dont match then a message box will appear.
I also want to create groups of people so if a certain group of people log in they go to a certain form and if the another group of people log in i want them to go to a different form.
Also i want the password box to be * instead of visable text.
dbProvider = "PROVIDER=Microsoft.Jet.OLEDB.4.0;"
dbSource = "Data Source = D:/Users.mdb"
con.ConnectionString = dbProvider & dbSource
[Code]....
I use AES encryption in my vb.net 2008 windows forms apps to ....
1. Store user passwords in sql server express database in encrypted form
2. decrypt the encrypted Sql server express connection string password on the fly when connecting to SQl Server over a vpn or direct to web based sql server database
3. decrypt the encrypted ftp site password on the fly when my application connects to my ftp site to upload client's database backups
The issue I have is that the secret key for the encryption / decryption is hard coded within the encryption/decryption functions. So anybody who decompiled my application would be able to generate the same encryption, as they would have the encryption secret key How can you hide the encryption secret key so that if anybody decompiled my app they could not reproduce the decryption function
I have text file that is saved as comma delimited. There are 3 columns with x number of rows. I cannot seem to figure out how to create an array that will store all three columns with the variable intProductArray as the length of the array. I have been opening the file with only one column and putting it into a textbox and using the lines of the textbox as the variable for length. I cannot figure out the array for all 3 columns.
Private Sub btnChoose_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnChoose.Click
Dim myFileDlog As New OpenFileDialog()
myFileDlog.InitialDirectory = "c:"
myFileDlog.Filter = "All Files (*.*)|*.*" & _
[Code] .....
"Create an array to store 10 integers. Initialize all the array elements with -1."
View 1 RepliesI've a treeview in my project form which look like this.
-Cover Page
-Video1
-Podcast1[code].....
The user will be able to upload their pages to the respective pages nodes and I am suppose to make it in such a way that after the user uploaded the cover page which is showing at the PictureBox1 which I've use to display the image, and when he uploads the second page image at the PictureBox1, the Cover page image that he uploaded earlier on will not be overwrite.
I was told to create class and use array to store the contain in the respective nodes but I do not have any idea how to do it.
I am trying to create the following program Store in a 1d array a set of 5 place names and in a 2d array the distances between the places. Ensure that the order of the places is the same in both arrays. When the names are places are input the distance between them is displayed. If they are not both in the table a suitable message is displayed
Dim town(1 To 5) As String
Dim Dist(1 To 5, 1 To 5) As Integer
Dim First As Integer
[CODE]......................
I think the best way forward is pass a parameter to the function findnumber.
I want to create a login system that reads the usernames and passwords for a list of arrays:[code]I have managed to code the program so it accepts the correct username and password and sends a error message when they don't match. The problem I'm having is when the user enters a username that isn't on my Username list. The program always crashes when I enter say "admin1000".[code]
View 3 RepliesI want to reading in a excel file and extract the sCodenumber sDescription ans the sStatus and store them in a array : StatusComposeArray(5200) As MyCompose. After this I need this array for comparing outside this class. But as can you see the array is defined inside the sub: ReadingIn_ExcelFilesCompose [Code]
View 2 Replies"Create a class called Invoice that a hardware store might use to represent an invoice for an item sold at the store. An Invoice should include four pieces of information as instance variables--a part number (type String), a part description (type String), a quantity of the item being purchased (type Integer) and a price per item (Type Integer). Your class should have a constructor that initialize for each of the four instance variables. Provide a property for each instance variable. If the quantity is not positive it should be set to zero. If the price per item is not positive it should be set to zero."
I attached the code I have. obj is underlined and says "Argument not specified for parameter 'Invoice4' of the 'Public Sub New (Invoice1 As Object, Invoice2 As Object, Invoice3 As Object, Invoice4 As Object)' and so the program won't run. What am I doing wrong?
Public Class Form1
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)
Dim obj1 As New Invoice(Val(TextBox1.Text))
TextBox1.Text &= obj1.Invoice1 & vbNewLine
TextBox1.Text &= obj1.Invoice2 & vbNewLine
TextBox1.Text &= obj1.Invoice3 & vbNewLine
TextBox1.Text &= obj1.Invoice4 & vbNewLine
[CODE]...
I am coding a program that will allow the user to input 5 payrolls for Store 1, Store 2, and Store 3. The total of the 5 payrolls are then added together and shown in the respective Store's labels. A total label is also there to add up all the totals into one number. The numbers in the label must be in currency form. My problem is the numbers don't add correctly when I hit calculate. The first two numbers add together, but then after that the number just seems to subtract a random amount.
So far I have this --
Public Class Form1
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Me.Close()
End Sub
[CODE[...
I want to store value in array, from my database. I am using following code but it return error: "Object reference not set to an instance of an object."[code...]
View 2 RepliesI'm having a hard time learning picture box.I can't figure out how to store a picture in an array.when i press the button the Picture Box1 generates 1 picture out of 5 pictures.[code]
View 8 RepliesI want to store a regular array in My.Settings. Not an ArrayList, not a StringCollection, just a string Array. Can this be done? If so, how is it done? I can't seem to find the string array datatype in the settings designer in Visual Studio.
View 3 RepliesI would want to store a datagrid row in a array.Every column value in a diffrent "part of the array".Like
Array(0) = column index 0
Array(1) = column index 1
But just from one row and the same row!
I have a table in an access database than manages user subscriptions. A user can have many subscriptions which is where im having trouble in terms of code.What i aim to do is store all the courses in an array of strings but i don't know how to do it.[code]The above code would be the command that i'd use to select the courses that the user has but i need to know how i would store the results in a array.
View 2 Repliesfirst i need to input the expression in textbox that will be store to CharArray and then substitute the variables to integer by using input boxes.. my problem is how can store the integer to an array and also store the operation..
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim arr() As Char = TextBox1.Text.ToCharArray
[Code]....
Problem storing value in array from database
View 3 RepliesI am trying to create a "Generate Number" application. It needs to generate numbers ( 1 - 100 ) and add them to the array. I have the numbers generated already and outputed into a list box. but I am not sure on how to add them to the array.
I have generated the numbers using for...next and do while loops. But I haven't been able to get the right syntax to be able to add the numbers into the array. [code]/...
i've a treeview in my project form which look like this.[code]The user will be able to upload their pages to the respective pages nodes and I am suppose to make it in such a way that after the user uploaded the cover page which is showing at the PictureBox1 which I've use to display the image, and when he uploads the second page image at the PictureBox1, the Cover page image that he uploaded earlier on will not be overwrite.I was told to create class and use array to store the contain in the respective nodes but I do not have any idea how to do it.Is there any other ways about solving this problem? I'm using Visual Studio 2008 vb.net.
View 2 RepliesI have a text file called COUNTERS_SETTINGS.DAT having the following contents:
[USERID]<=>COUNTER_1
[PASSWORD]<=>ADMIN1
[CONNECT_STRING]<=>DATA SOURCE=RECAT;USER ID=PAYOPER;PASSWORD=PAYOPER
I'm Trying to have that entries in a Jagged array of Strings like this
Array Name is : Core (2,1)
Core
(0) (1)
(0) USERID | COUNTER_1
(1) PASSWORD | ADMIN1[code]........
I have the following code which obtains the compass direction from a degree value. I'm new to VB.Net and was wondering what is the best way to store the values, in an Enum or an Array?
[Code]...
I'm trying to convert old code to VB in VS2005. The code I'm working on is used to store values in a string, which will then be handed to a proprietary scramble function. This function is a given in this case. I've already switched from a string to an array of bytes in my .NET code.
The old code (VBA) was using a string value to store the data, example function for Double value:
Private Function DoubleToStr(ByVal value As Double) As String
Dim Bytes(7) As Byte ' 0-7 Double is 8 bytes
Dim n As Long
CopyMemory(Bytes(0), value, 8)
DoubleToStr = ""
For n = 0 To UBound(Bytes)
DoubleToStr = DoubleToStr & Chr(Bytes(n))
Next n
End Function
The code basically copies the memory contents (using API call CopyMemory) of the memory (held by the double variable) to the memory held by a byte array. It then reads the byte array and converts it into a string. Workarounds could be to convert a bool or long to a string, though that would be expensive in terms of memory/storage eg. 1234564787 would be 10 bytes in a string where as a long is only 4 bytes (factor 2.5 increase).
How to retain the original precision? Converting it to a string would result in endless numbers. Another problem (at least I think it could be) is that in VBA the variables are rather simple, but in .NET they are all objects, so how to retrieve the actual memory location of the value? let alone garbage collection moving stuff around. How to get those variables stored in my byte array?
I'm writing a program that reads randomized test questions from a text file. The text file includes information about how to set up the screen including which pictures, videos or buttons etc. to show for each question. The user responds to the questions and another text file is created logging the results. would it be better to read in all the data from the text file into an array to work with during the test, or should I just read the questions one at a time keeping the text file open while the user responds. The amount of data that would be read into an array for an average test would be about 200 lines which range from a single character to 20 sentences (whose length would of course vary).
View 5 RepliesI'm retrieving data from Active Directory(name,department,title,company,mail) into a string seperated by commas and I want to split the string and store them to array where i can export it in excel before updating it to my database. but i how do i store them to an array?
here's the code: I'm getting data from AD and storing it in list:
Dim formattedName As String = String.Format("{0},{1},{2},{3},{4},{5}", _
resEnt.Properties("name")(0).ToString(), _
resEnt.Properties("company")(0).ToString(), _
resEnt.Properties("department")(0).ToString(),
[Code]...
In the following code (Class & Form1), I'm trying to figure out the following:
- Create an array that stores the 'Clients' (first name, last name, account number)
- 'Button List' the array with the (First Name , Last Name , Array Value , Account Balance) [code]