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Forms and Passwords

I have a script in which it keeps opening the same form
instead of only one instance. I also need help with a
form that has a password. Where do I put the actual
password? can I use a database for multiple users?

opens multiple instances of password form instead of one:

Public Class Splash
Inherits System.Windows. Forms.Form

#Region " Windows Form Designer generated code "

Public Sub New()
MyBase.New()

'This call is required by the Windows Form
Designer.
InitializeCompo nent()

'Add any initialization after the
InitializeCompo nent() call

End Sub

'Form overrides dispose to clean up the component
list.
Protected Overloads Overrides Sub Dispose(ByVal
disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Disp ose()
End If
End If
MyBase.Dispose( disposing)
End Sub

'Required by the Windows Form Designer
Private components As System.Componen tModel.IContain er

'NOTE: The following procedure is required by the
Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents SplashIMG As
System.Windows. Forms.PictureBo x
Friend WithEvents SplashTimer As
System.Windows. Forms.Timer
<System.Diagnos tics.DebuggerSt epThrough()> Private
Sub InitializeCompo nent()
Me.components = New
System.Componen tModel.Containe r()
Dim resources As System.Resource s.ResourceManag er
= New System.Resource s.ResourceManag er(GetType(Spla sh))
Me.SplashIMG = New System.Windows. Forms.PictureBo x
()
Me.SplashTimer = New System.Windows. Forms.Timer
(Me.components)
Me.SuspendLayou t()
'
'SplashIMG
'
Me.SplashIMG.Im age = CType(resources .GetObject
("SplashIMG.Ima ge"), System.Drawing. Bitmap)
Me.SplashIMG.Na me = "SplashIMG"
Me.SplashIMG.Si ze = New System.Drawing. Size(600,
300)
Me.SplashIMG.Ta bIndex = 0
Me.SplashIMG.Ta bStop = False
'
'SplashTimer
'
Me.SplashTimer. Enabled = True
Me.SplashTimer. Interval = 1000
'
'Splash
'
Me.AutoScaleBas eSize = New System.Drawing. Size(5,
13)
Me.ClientSize = New System.Drawing. Size(600, 300)
Me.Controls.Add Range(New
System.Windows. Forms.Control() {Me.SplashIMG})
Me.FormBorderSt yle =
System.Windows. Forms.FormBorde rStyle.None
Me.Name = "Splash"
Me.ShowInTaskba r = False
Me.StartPositio n =
System.Windows. Forms.FormStart Position.Center Screen
Me.Text = "KS.IntraNe t"
Me.ResumeLayout (False)

End Sub

#End Region

Private Sub SplashIMG_Click (ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
SplashIMG.Click

End Sub

Private Sub Timer1_Tick(ByV al sender As
System.Object, ByVal e As System.EventArg s) Handles
SplashTimer.Tic k
Dim frmLogin As New Login()
frmLogin.Show()
End Sub

End Class

Password Form:

Public Class Login
Inherits System.Windows. Forms.Form

#Region " Windows Form Designer generated code "

Public Sub New()
MyBase.New()

'This call is required by the Windows Form
Designer.
InitializeCompo nent()

'Add any initialization after the
InitializeCompo nent() call

End Sub

'Form overrides dispose to clean up the component
list.
Protected Overloads Overrides Sub Dispose(ByVal
disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Disp ose()
End If
End If
MyBase.Dispose( disposing)
End Sub

'Required by the Windows Form Designer
Private components As System.Componen tModel.IContain er

'NOTE: The following procedure is required by the
Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents UserLbl As
System.Windows. Forms.Label
Friend WithEvents UserINP As
System.Windows. Forms.TextBox
Friend WithEvents PassINP As
System.Windows. Forms.TextBox
Friend WithEvents PassLbl As
System.Windows. Forms.Label
Friend WithEvents LoginBTN As
System.Windows. Forms.Button
Friend WithEvents CancelBTN As
System.Windows. Forms.Button
<System.Diagnos tics.DebuggerSt epThrough()> Private
Sub InitializeCompo nent()
Me.UserLbl = New System.Windows. Forms.Label()
Me.UserINP = New System.Windows. Forms.TextBox()
Me.PassINP = New System.Windows. Forms.TextBox()
Me.PassLbl = New System.Windows. Forms.Label()
Me.LoginBTN = New System.Windows. Forms.Button()
Me.CancelBTN = New System.Windows. Forms.Button()
Me.SuspendLayou t()
'
'UserLbl
'
Me.UserLbl.Loca tion = New System.Drawing. Point(0,
10)
Me.UserLbl.Name = "UserLbl"
Me.UserLbl.Size = New System.Drawing. Size(64, 16)
Me.UserLbl.TabI ndex = 0
Me.UserLbl.Text = "Username:"
'
'UserINP
'
Me.UserINP.Loca tion = New System.Drawing. Point
(56, 8)
Me.UserINP.Name = "UserINP"
Me.UserINP.Size = New System.Drawing. Size(120, 20)
Me.UserINP.TabI ndex = 1
Me.UserINP.Text = ""
'
'PassINP
'
Me.PassINP.Loca tion = New System.Drawing. Point
(56, 32)
Me.PassINP.Name = "PassINP"
Me.PassINP.Pass wordChar =
Microsoft.Visua lBasic.ChrW(42)
Me.PassINP.Size = New System.Drawing. Size(120, 20)
Me.PassINP.TabI ndex = 2
Me.PassINP.Text = ""
Me.Validate.Equ als(3224)
'
'PassLbl
'
Me.PassLbl.Loca tion = New System.Drawing. Point(0,
34)
Me.PassLbl.Name = "PassLbl"
Me.PassLbl.Size = New System.Drawing. Size(64, 16)
Me.PassLbl.TabI ndex = 3
Me.PassLbl.Text = "Password:"
'
'LoginBTN
'
Me.LoginBTN.Loc ation = New System.Drawing. Point
(16, 56)
Me.LoginBTN.Nam e = "LoginBTN"
Me.LoginBTN.Siz e = New System.Drawing. Size(66, 24)
Me.LoginBTN.Tab Index = 4
Me.LoginBTN.Tex t = "Login"
'
'CancelBTN
'
Me.CancelBTN.Lo cation = New System.Drawing. Point
(96, 56)
Me.CancelBTN.Na me = "CancelBTN"
Me.CancelBTN.Si ze = New System.Drawing. Size(66,
24)
Me.CancelBTN.Ta bIndex = 5
Me.CancelBTN.Te xt = "Cancel"
'
'Login
'
Me.AutoScaleBas eSize = New System.Drawing. Size(5,
13)
Me.ClientSize = New System.Drawing. Size(186, 88)
Me.Controls.Add Range(New
System.Windows. Forms.Control() {Me.CancelBTN,
Me.LoginBTN, Me.UserINP, Me.PassINP, Me.PassLbl,
Me.UserLbl})
Me.FormBorderSt yle =
System.Windows. Forms.FormBorde rStyle.FixedToo lWindow
Me.Name = "Login"
Me.StartPositio n =
System.Windows. Forms.FormStart Position.Center Screen
Me.Text = " Network Login"
Me.ResumeLayout (False)

End Sub

#End Region

Private Sub Login_Load(ByVa l sender As System.Object,
ByVal e As System.EventArg s) Handles MyBase.Load

End Sub

Private Sub Login_Click(ByV al sender As
System.Object, ByVal e As System.EventArg s) Handles
UserLbl.Click

End Sub

Private Sub CancelBTN_Click (ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
CancelBTN.Click
End
End Sub

Private Sub PassINP_TextCha nged(ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
PassINP.TextCha nged

End Sub
End Class

Thanks for the help in advance

Joshua Kendall
Nov 20 '05 #1
15 2059
* "Joshua Kendall" <jo****@goartic .com> scripsit:
I have a script in which it keeps opening the same form
instead of only one instance. I also need help with a
form that has a password. Where do I put the actual
password? can I use a database for multiple users?


This depends on the type of the application. Storing a password in a
database doesn't make sense if the user is able to read it from the
database. Maybe it's easier to find a good solution if you provide more
information on the purpose of your application.

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>
Nov 20 '05 #2
It's kind of like a network interface for a program. Only
one user can be logged in with that information at one
time and a database would be hidden and encrypted.
-----Original Message-----
* "Joshua Kendall" <jo****@goartic .com> scripsit:
I have a script in which it keeps opening the same form instead of only one instance. I also need help with a
form that has a password. Where do I put the actual
password? can I use a database for multiple users?
This depends on the type of the application. Storing a

password in adatabase doesn't make sense if the user is able to read it from thedatabase. Maybe it's easier to find a good solution if you provide moreinformation on the purpose of your application.

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>
.

Nov 20 '05 #3
I'd store the passwords in a config file/registry or in a database
encrypted. If you store them in the DB, then make a totally gimped out
account that you call when the program opens that can verify the password,
but don't store your passwords in clear text unless you are 10000000%
certain that unwanted eyes will never see it.

If you want only one instance of your class to ever be open at once (form,
not app), then a Singleton pattern is made to order.... here's a good link
on the implementation
http://www.ondotnet.com/pub/a/dotnet...singleton.html

As far as database for multiple users...the short answer is probably . Most
every commercial Database supports multi-users, although desktop databases
like Access don't do a very good job of handling more than a few users in
most cases.

As far as form with a Password, what do you need help with? The above will
show you how to ensure only one instance. As far as the form itself, drag a
textbox onto your form (you mention Forms so I'm assuming this is a Windows
program, not a web program) and then set the PasswordChar property of the
textbox which will hold the password to some character like "*".
http://msdn.microsoft.com/library/de...dchartopic.asp
Then, when a user types in a password, they will see "*****" instead of
"mypassword "
there are many good examples of encrypting text, here's one good link
http://www.dotnetsmart.com/showpost.aspx?PostID=255 . So all you need to do
is encrypt the password when you submit it to the DB the first time through.
Each request tot he DB gets the cypher text and decrypts it. Do this
locally in your BusinessLogic component so that you send encrypted data
over your network, unless you are 100000 sure that no one is sniffiing it
(and even then, I'd still recommend sending it wrapped under a strong crypto
algorithm).

Let me know if you are having any specific problems though that I can help
you with..or If I was unclear about anything.

Cheers,

Bill
"Joshua Kendall" <jo****@goartic .com> wrote in message
news:00******** *************** *****@phx.gbl.. .
I have a script in which it keeps opening the same form
instead of only one instance. I also need help with a
form that has a password. Where do I put the actual
password? can I use a database for multiple users?

opens multiple instances of password form instead of one:

Public Class Splash
Inherits System.Windows. Forms.Form

#Region " Windows Form Designer generated code "

Public Sub New()
MyBase.New()

'This call is required by the Windows Form
Designer.
InitializeCompo nent()

'Add any initialization after the
InitializeCompo nent() call

End Sub

'Form overrides dispose to clean up the component
list.
Protected Overloads Overrides Sub Dispose(ByVal
disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Disp ose()
End If
End If
MyBase.Dispose( disposing)
End Sub

'Required by the Windows Form Designer
Private components As System.Componen tModel.IContain er

'NOTE: The following procedure is required by the
Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents SplashIMG As
System.Windows. Forms.PictureBo x
Friend WithEvents SplashTimer As
System.Windows. Forms.Timer
<System.Diagnos tics.DebuggerSt epThrough()> Private
Sub InitializeCompo nent()
Me.components = New
System.Componen tModel.Containe r()
Dim resources As System.Resource s.ResourceManag er
= New System.Resource s.ResourceManag er(GetType(Spla sh))
Me.SplashIMG = New System.Windows. Forms.PictureBo x
()
Me.SplashTimer = New System.Windows. Forms.Timer
(Me.components)
Me.SuspendLayou t()
'
'SplashIMG
'
Me.SplashIMG.Im age = CType(resources .GetObject
("SplashIMG.Ima ge"), System.Drawing. Bitmap)
Me.SplashIMG.Na me = "SplashIMG"
Me.SplashIMG.Si ze = New System.Drawing. Size(600,
300)
Me.SplashIMG.Ta bIndex = 0
Me.SplashIMG.Ta bStop = False
'
'SplashTimer
'
Me.SplashTimer. Enabled = True
Me.SplashTimer. Interval = 1000
'
'Splash
'
Me.AutoScaleBas eSize = New System.Drawing. Size(5,
13)
Me.ClientSize = New System.Drawing. Size(600, 300)
Me.Controls.Add Range(New
System.Windows. Forms.Control() {Me.SplashIMG})
Me.FormBorderSt yle =
System.Windows. Forms.FormBorde rStyle.None
Me.Name = "Splash"
Me.ShowInTaskba r = False
Me.StartPositio n =
System.Windows. Forms.FormStart Position.Center Screen
Me.Text = "KS.IntraNe t"
Me.ResumeLayout (False)

End Sub

#End Region

Private Sub SplashIMG_Click (ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
SplashIMG.Click

End Sub

Private Sub Timer1_Tick(ByV al sender As
System.Object, ByVal e As System.EventArg s) Handles
SplashTimer.Tic k
Dim frmLogin As New Login()
frmLogin.Show()
End Sub

End Class

Password Form:

Public Class Login
Inherits System.Windows. Forms.Form

#Region " Windows Form Designer generated code "

Public Sub New()
MyBase.New()

'This call is required by the Windows Form
Designer.
InitializeCompo nent()

'Add any initialization after the
InitializeCompo nent() call

End Sub

'Form overrides dispose to clean up the component
list.
Protected Overloads Overrides Sub Dispose(ByVal
disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Disp ose()
End If
End If
MyBase.Dispose( disposing)
End Sub

'Required by the Windows Form Designer
Private components As System.Componen tModel.IContain er

'NOTE: The following procedure is required by the
Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents UserLbl As
System.Windows. Forms.Label
Friend WithEvents UserINP As
System.Windows. Forms.TextBox
Friend WithEvents PassINP As
System.Windows. Forms.TextBox
Friend WithEvents PassLbl As
System.Windows. Forms.Label
Friend WithEvents LoginBTN As
System.Windows. Forms.Button
Friend WithEvents CancelBTN As
System.Windows. Forms.Button
<System.Diagnos tics.DebuggerSt epThrough()> Private
Sub InitializeCompo nent()
Me.UserLbl = New System.Windows. Forms.Label()
Me.UserINP = New System.Windows. Forms.TextBox()
Me.PassINP = New System.Windows. Forms.TextBox()
Me.PassLbl = New System.Windows. Forms.Label()
Me.LoginBTN = New System.Windows. Forms.Button()
Me.CancelBTN = New System.Windows. Forms.Button()
Me.SuspendLayou t()
'
'UserLbl
'
Me.UserLbl.Loca tion = New System.Drawing. Point(0,
10)
Me.UserLbl.Name = "UserLbl"
Me.UserLbl.Size = New System.Drawing. Size(64, 16)
Me.UserLbl.TabI ndex = 0
Me.UserLbl.Text = "Username:"
'
'UserINP
'
Me.UserINP.Loca tion = New System.Drawing. Point
(56, 8)
Me.UserINP.Name = "UserINP"
Me.UserINP.Size = New System.Drawing. Size(120, 20)
Me.UserINP.TabI ndex = 1
Me.UserINP.Text = ""
'
'PassINP
'
Me.PassINP.Loca tion = New System.Drawing. Point
(56, 32)
Me.PassINP.Name = "PassINP"
Me.PassINP.Pass wordChar =
Microsoft.Visua lBasic.ChrW(42)
Me.PassINP.Size = New System.Drawing. Size(120, 20)
Me.PassINP.TabI ndex = 2
Me.PassINP.Text = ""
Me.Validate.Equ als(3224)
'
'PassLbl
'
Me.PassLbl.Loca tion = New System.Drawing. Point(0,
34)
Me.PassLbl.Name = "PassLbl"
Me.PassLbl.Size = New System.Drawing. Size(64, 16)
Me.PassLbl.TabI ndex = 3
Me.PassLbl.Text = "Password:"
'
'LoginBTN
'
Me.LoginBTN.Loc ation = New System.Drawing. Point
(16, 56)
Me.LoginBTN.Nam e = "LoginBTN"
Me.LoginBTN.Siz e = New System.Drawing. Size(66, 24)
Me.LoginBTN.Tab Index = 4
Me.LoginBTN.Tex t = "Login"
'
'CancelBTN
'
Me.CancelBTN.Lo cation = New System.Drawing. Point
(96, 56)
Me.CancelBTN.Na me = "CancelBTN"
Me.CancelBTN.Si ze = New System.Drawing. Size(66,
24)
Me.CancelBTN.Ta bIndex = 5
Me.CancelBTN.Te xt = "Cancel"
'
'Login
'
Me.AutoScaleBas eSize = New System.Drawing. Size(5,
13)
Me.ClientSize = New System.Drawing. Size(186, 88)
Me.Controls.Add Range(New
System.Windows. Forms.Control() {Me.CancelBTN,
Me.LoginBTN, Me.UserINP, Me.PassINP, Me.PassLbl,
Me.UserLbl})
Me.FormBorderSt yle =
System.Windows. Forms.FormBorde rStyle.FixedToo lWindow
Me.Name = "Login"
Me.StartPositio n =
System.Windows. Forms.FormStart Position.Center Screen
Me.Text = " Network Login"
Me.ResumeLayout (False)

End Sub

#End Region

Private Sub Login_Load(ByVa l sender As System.Object,
ByVal e As System.EventArg s) Handles MyBase.Load

End Sub

Private Sub Login_Click(ByV al sender As
System.Object, ByVal e As System.EventArg s) Handles
UserLbl.Click

End Sub

Private Sub CancelBTN_Click (ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
CancelBTN.Click
End
End Sub

Private Sub PassINP_TextCha nged(ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
PassINP.TextCha nged

End Sub
End Class

Thanks for the help in advance

Joshua Kendall

Nov 20 '05 #4
* <an*******@disc ussions.microso ft.com> scripsit:
It's kind of like a network interface for a program. Only
one user can be logged in with that information at one
time and a database would be hidden and encrypted.


Thanks for providing this information. What's exactly your problem with
storing the information in this database?

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>
Nov 20 '05 #5
What do I type to get the program to see what the
password is? I know that "me.PassINP.Pas swordChar = *"
makes them asterics, but for the time being it will only
be one password so how do I program the password in? I'll
leave the database till after I get the program to my
specifications.

Thanks In advanced!

Joshua Kendall
Nov 20 '05 #6
Hi Joshua,

The <User> will see asterisks but PassINP.Text will be what they
actually typed. For now, just to get it working, have an array (or just a
single string) with the passwords.

Private sExamplePasswor d As String = "FooBar"
or
Private asExamplePasswo rd() As String = { "Foo", "Bar"}

Then test against the string or the array on [Go 4 It!].

Regards,
Fergus

--
(Please ignore this - there's a feud going on)
=============== =============== =============== =====
Quote of the day
Herfried:
I don't need/want human interaction.
=============== =============== =============== =====
Nov 20 '05 #7
The form that loads the password area won't open it once
it opens it until otherwise stopped in VB. What can I do
to make it open once.

Code:

Private Sub Timer1_Tick(ByV al sender As System.Object,
ByVal e As System.EventArg s) Handles SplashTimer.Tic k
Dim frmLogin As New Login()
frmLogin.ShowDi alog()
End Sub

Thanks!

Joshua Kendall
Nov 20 '05 #8
* "Joshua Kendall" <jo****@goartic .com> scripsit:
What do I type to get the program to see what the
password is? I know that "me.PassINP.Pas swordChar = *"
The textbox's 'Text' property will still return the text entered without
the password character.
makes them asterics, but for the time being it will only
be one password so how do I program the password in? I'll
leave the database till after I get the program to my
specifications.


I don't really understand what the point of your question is... Do you
have problem storing the passoword, entering the password or in checking
if the password is valid?

--
Herfried K. Wagner
MVP · VB Classic, VB.NET
<http://www.mvps.org/dotnet>
Nov 20 '05 #9
Hi Joshua,

|| The form that loads the password area
|| won't open it once it opens it

??

|| until otherwise stopped in VB

We've done this already in the other thread.
Stop the Timer like I showed you.

Regards,
Fergus
Nov 20 '05 #10

This thread has been closed and replies have been disabled. Please start a new discussion.

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by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
0
5967
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
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4477
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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3175
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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2539
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.
3
2118
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

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