I'm looking to be able to save and load the content from multiple structured arrays and variables into/from an encrypted file, is there any reliable source of information or tutorial that I'd be able to use for this? I've never written a program in visual basic that writes to/reads from a file.
I'm using microsoft visual studio 2008.
I'm looking for a way to save text directly to an encrypted file, without saving it to a plain text file and encrypt this text file afterwards.
I don't care about the encryption type used as long as it is easy to implement and secure enough..
<pre-question blab>// skip if you want Might as well consider me new, as I haven't programmed in years, and that was only tinkering in Java. Trying to get back on track a bit, so starting with VB to get the feel going to continue learning. I don't mind putting in the effort to learn and look up, I just am not 100% sure what I should be looking into at the moment... Old programming I did was nothing advanced, only little things like calculators, notepad-esque writers, and that sort.</pre-question blab>
I'm BASICally wanting to know what I should look into for saving multiple variables of a custom class object to be loaded later. I've seen some things about text, and I can do that fine, but don't think it would be the proper/best way of handling things
at all. I also saw some talk of XML, SQL tables, etc. I just need a point in the right direction.
For a bit more info on my actual project, I was tinkering with a 'simple' program to allow users to create rooms/objects/etc., which will then be converted into Inform 7 language (an interactive-fiction language).The variables needing stored are objects with a number of string variables and integer variables. I need to be able to save those, then load them out later into an array of said objects.
For anyone needing a more VISUAL image of what I mean, here are a few screenshots to show you what I mean. Also, if anyone has ever used Adrift, it is (at the moment) very similar to it, but for the Inform language.
Screenshot 1
Screenshot 2
arrays saving to file that if new user account is added name and email address is saved. if in the future multiple users login in whe name and email address will match correct users.
here is what i got so far....
Public Class Form1
Public strName, strSurname, strEmail, strPassword As String
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
[Code].....
visual basic 2008
I am pretty good with visual basic and visual studio, but the one problem I have is saving... I am currently creating a game, and it has a lot of variables, I want o be able to save all those variables to a text file and then re-open it later. When it is open, i want the variables to have the original value from the text document.
To sum it up: I need variables to be saved in a text file, and then be able to open the text file back and have the variables have the proper values from the text file.
I have been searching around google, and I found ideas, but I have no idea how to use them. Like using XML or saving a table with " TextFile.WriteFromTable" "TextFile.ReadToTable" but I don't exactly get how to use those (the posts weren't too clear)
trying to save users names and passwords from input boxes and save it as arrays in text file that in future multiple users will log in with their names and passwords
have this code so far but doesnt realy save the user info to file, dont even create file.
Imports System.IO
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code].....
how to take a text file that was provided for my homework assignment, and put the information within it into 3 different arrays.[code]
View 2 Repliesi'm having issues where I can't figure out how to take a text file that was provided for my homework assignment, and put the information within it into 3 different arrays.The .txt file looks like so:tc.Amanda/Ashley have to be in the same array as well as 4/2, 166/20.This is what I've come up with for the snippet of code, and so far, it hasn't really been working right.
Dim namearray(MaxItems), rankarray1990(MaxItems), rankarray2009(MaxItems) As String
Dim Numitems As Integer
Dim sr As System.IO.StreamReader
[code].....
I Have a complex Class Structure that holds a large amount of data in the form of multiple nested arrays that I want to save to a file and retrieve everytime I use my program.. How do I do this? I am using VB10 Express.
View 5 RepliesI have learnt how to create a basic random word generator. I now want to take this further but I would like to know if what I am thinking of is possible. I am in the process of wanting to create a random name/word generator which reads/loads an array from a text file. think this part I will be Ok with as there are some vids and tutorials about. However, I wish for the text file to have multiple arrays and then dependant on the day and time of the day, only a string from the current time array is loaded. Does that make sense and is it possible? I am happy to spend time learning how to do this but only if it is possible.
View 3 RepliesI am wanting to get information from a text file into different arrays.
My current text file has a new line for each driver but I would like it to look something like this
[code]...
I'm writing an application in vb.net 2008. It's basically a randomised image quiz. I have saved questions, answers and time taken to answer questions into 3 listboxes: listboz1, listbox2 and listbox3. I'm trying to add the content of all into a csv file. This is my code below which only saves the contents of one listbox to a txt file. How do I get a combination of all listboxes in the file with format (L1,L2,L3)? I alos want to add the user name and the date the test/ quiz was taken.
[Code].....
I am compiling a quiz, so the question number, user response and time taken to answer questions are sent to 3 listboxes. I wanted to save the file name (from the login form, date and listbox contents to a text file. I have scoured numerous codws...none of them work..all with errors. I have tried to look at Streamwriting listboxes. But can not find a way to add multiple listboxes to one text box. Actually none of the codes (including the Sub SaveToKnownFileWithDelimiter (below) I have looked at work.
This is my quiz code so far....
Public Class Form1
Dim intPic As Integer
Dim pickedImg As New List(Of Integer)
[Code].....
I'm trying to save the contents for a listbox, which can contain up to 10 records(items) as follow:
1 + 1 = 2
1 - 1 = 0 and so on.
The code that I currently have is recording only the last item of the listbox
Below what I have so far:
Imports System.Xml.Serialization
Imports System.IO
Public Class SerializeData
' Save - serialize the object to disk...'
[Code].....
i am going to be saving data with DPAPI encryption. i am not sure whether i should just have one big file with all the data or should i break up the data into separate files, where every file is its own record. i suspect the entire dataset would be less than 10mb, so i am not sure whether it's worth it to break it down into about a few hundred separate files or should i just keep it one file?
View 2 RepliesLets say you have a few text boxes, I know how to save the information in each box to a text file, but that creates a file for each box. Is it possible to save the contence of lots of different text boxes to 1 text file, and then when loading them it would load it all back to the right places?
View 9 RepliesI have a sign up sheet that I am creating for a project I'm working on and the sign up sheet works and I can enter all my data into the text fields and save the info but when I go to open the file again all the data is pushed into one text box and not in their own fields?
If there a trick in the SaveFileDialog that I can use to save each field to file then open them back in their own field?
Here's a screen shot of the before and after the program [URL]
And here is code behind the Save button [URL]
I am using VB2008 now, couple of simple questions.
1) Is there some way to limit what my user puts in their textbox to numbers only? Or is there some way to check afterwards that the string only contains numbers and delete it if it contains anything else?
2) How to open a file, save the values of 5 text boxes into the file and then close the file?
I have code, shown below, that works all except for 1 thing: The variables being passed byRef get passed, but once modified in the else section of the "if me.invokerequired" code of RecordData, the variables are never updated in the calling function. To reiterate, the calling function does not receive the updated data that is in the variables custid and amt.When debugging, I see the data change in the else section of "if me.invokerequired", but once it returns from the callback the data is missing.[code]
View 15 RepliesSo I'm in the final stages of finishing a program I've been working on for nearly a year now, and this is basically my final hurdle. The Save dialogue is working beautifully, with 'flags' in order to switch it over from the regular input into text boxes to the Listbox input protocol.
However, I'm having a *** of a time getting it to take lines from the text file and put them in the proper text box. Here is an example file:
Quote:
SHOWNAME
CALLNAME
BREED
[Code]....
So with the sample file I provided above, in the textbox named callNameText would appear "SHOWNAME", and so on and so forth. With this build, I get a NullReferenceException on the "Me.Controls(strboxNames(i)).Text() = strAllText(ati)" line.
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?
View 1 RepliesI am trying to get the information inputted from multiple textboxes to save to a single text file.
Here's what I got.
Private Sub btn_done_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btn_done.Click
Dim FILE_NAME As String = "C:UsersTrevorDocumentsDraftAC est.txt"
Dim i As Integer
Dim aryText(2) As String
[Code] .....
Public Sub drawChart()
Dim panel As Graphics = picBox.CreateGraphics
Dim myTextBrush As SolidBrush = New SolidBrush(Color.Black)
[code].....
I loading an array with data from my data base and then putting into a session Variable. I do not get any errors on that code. When I try to put the session Variable back into an array in my .aspx page I receive the following error message: [code]
View 5 RepliesI have a pipe delimited file with 3 values on each line, something like this:
0001|234587|Bracket, 3 x 3 x 0.125, Steel
0001|254378|Bracket, 4 x 4 x 0.125, Steel
0003|234587|Hinge, 4 x 4 x 0.125, Brass
The first Value can be duplicated in the file, the second value also can be duplicated. There are no instances of BOTH values duplicated on 2 or more lines. I need to read another file and get the first 2 values, then look up those two on one line to get the proper 3rd value. The "other" file looks a bit like this:
0E0522070001EF54ED7823458700FF00FFA5A5A5A5
-----------XXXX-----------XXXXXX--------------------- (X's are the data, the rest is filler to comply with some code unknown to me)
Right now I have code to read all into an array (split on vbcrlf), then split each line on "|" and populate three arrays, I then go thru every element of the first column that matches the value I am looking for and test that the second column also matches the second value and if so, return the third array contents at the same index. This seems crude and inefficient. Cannot use a hashtable (I don't think) as it only supports 2 values. A List(Of) doesn't seem to work either and I don't want to use a database.
I am trying to complete a homework and seem to get stuck at the last point of passing arrays and avriables to a sub to do the calculations to produce the desired result of sales tax but can;t seem to accomplish that so far.
Public
Class
frmSalestax
Dim
[code]....
I can't get my variables in the program below into thier arrays.
Dim lblnumbers(6) As Label, txtweight(6) As TextBox
Dim txtnumbers(6) As TextBox, sngnumbers(6) As Single
Dim grade() As String, g As Integer = 1, weight() As String
[CODE]...
My program is only one form, at a certain point I want the form to reload, and have all the variables and arrays be reset? I am able to to reload the form by:
Dim frm As Form
frm = New frmMain
frm.Show()
But the original form still stays open? My program is a version of blackjack. when who won or lost is figured out i want all the cards to clear (held in an array of picture boxes) I have random numbers generated (also put into an array) each random number then finds the image of the card it belongs too and then places it into the array of picture boxes. How to reset the arrays so I thought maybe trying to just reload the form would work?
SI have a form and on submit I need the following variables stored in array.
Dim OrderName, OrderNumber, OrderSize, OrderQuantity, OrderAddOn, OrderEachPrice, OrderTotal As String
So pretty much its an order a customer will be making and every time a new order is placed, a new array will be made.
Example:
OrderName = TextBox1.Text was Sean
OrderNumber = TextBox2.Text was 123456
OrderSize = TextBox3.Text was Large
OrderQuantity = TextBox4.Text was 2
OrderAddOn = TextBox5.Text was Pocket
OrderEachPrice = TextBox6.Text was 10
OrderTotal = TextBox7.Text was 20.00
On submit a new array would be created and would be something like this:
Dim ArrayName(,) As String = {{"Sean", "123456", "Large", "2", "Pocket", "10", "20.00"}}
BUT a new array has to be created each time the submit is clicked.
I am trying to do the following:
Public WithEvents frmButtons(999) As Button
And then use it like this:
Private Sub frmButtons_Click(ByVal sender As Object, ByVal index As Long) Handles frmButtons.Click
Where the index variable has to represent the object in the array like this:
frmButtons(index).Text="..."
But it gives me an error:
'WithEvents' variables cannot be typed as arrays.