Member Avatar for geetajlo

hi i want to have a sample on how to link a form to another. need help plzzzz friends. have to submit a project and i want to implement in in that.
i want to link a login page to a form. if login = True then direct to form else login fails.

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This thread is about wiring a login screen to the rest of an app, and about managing multiple forms. The original ask from is a common pattern in VB.NET WinForms: authenticate first, then open the main UI only if authentication succeeds. and pointed to simple Show/ShowDialog approaches; those work for tiny demos but can lead to messy lifecycle, duplicated instances, and hard-to-maintain code as the project grows. wanted to link many forms — a few scalable options are outlined below. Also note ’s moderation points: keep replies focused and avoid thread hijacking.

A concise, maintainable WinForms pattern: perform authentication (in code, not just UI), then start the main form with Application.Run so the app lifecycle is clear. Example flow (simplified):

' Program.vb
Sub Main()
    Application.EnableVisualStyles()
    Application.SetCompatibleTextRenderingDefault(False)

    Using login As New LoginForm()
        If login.Authenticate() Then
            Application.Run(New MainForm(login.CurrentUser))
        End If
    End Using
End Sub

' LoginForm.vb
Public Function Authenticate() As Boolean
    ' validate credentials against your store and set CurrentUser
    Return ValidateCredentials(txtUser.Text, txtPass.Text)
End Function

For multiple windows: avoid opening lots of modeless forms. Options that scale:

  • Use an MDI parent or a single MainForm that swaps UserControls for different views.
  • Keep a dictionary of open child forms to avoid duplicates and to manage disposal.
  • Use events or constructor parameters to pass authenticated user info rather than globals.

For web/ASP.NET scenarios, do not try to “link forms” like desktop apps — use an authentication framework (ASP.NET Identity) and redirect on success. Security notes: never store plain-text passwords, use parameterized queries or an ORM, and dispose forms/connections properly.

Further reading: Application.Run and Windows Forms application lifecycle (Microsoft): https://learn.microsoft.com/en-us/dotnet/api/system.windows.forms.application.run?view=windowsdesktop-6.0
ASP.NET Identity (authentication best practice): https://learn.microsoft.com/en-us/aspnet/core/security/authentication/identity?view=aspnetcore-7.0

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Member Avatar for Ramy Mahrous

overload ShowDialog method make it returns true or false in case of true show second (main) form
your question is long but I'll tell you how to call a form from another one
this example calls form 2 from form number 1

dim form2 as Form2()
form2.ShowDialog()
Member Avatar for robman

iam requesting a code for linking many forms

Member Avatar for codeorder

iam requesting a code for linking many forms

Form2.Show()
        Form3.Show()
        Form4.Show()
        Form5.Show()

If you have more Forms than the above code, just add them to the list.

Member Avatar for dewtech

how can i create database with vb.net

commented: Don't hijack threads -3
Member Avatar for Reverend Jim
  1. Don't hijack threads
  2. Don't resurrect old threads
  3. Show some effort before you post
  4. Provide some details
commented: You should make this post into a keyboard macro. You could use it a lot around here. +6
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