How can I make a single event handler handle ALL Button.Click events?

by

You can modify the Handles clause on the VS generated event code so that it can process the same event for multiple controls. In most cases, someone might want to funnel most, but not all, button clicks to one procedure. To change the Handles clause:

Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button1.Click, 
                 Button3.Click, Button4.Click ...
    ' just add the extra clicks for the additional ones

    ' you will need to examine "Sender" to determine which was clicked

    ' your code here
End Sub

This can also be done dynamically, such as for controls which are created and added to a form in the Load event (or where ever):

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    AddHandler Button1.Click, AddressOf AllButtonsClick
    AddHandler Button2.Click, AddressOf AllButtonsClick
    AddHandler Button3.Click, AddressOf AllButtonsClick

End Sub

To literately wire all buttons to the same event, you can loop thru the controls collection (uses Linq):

For Each b As Button In XXXXX.Controls.OfType(Of Button)
     AddHandler b.Click, AddressOf MyClickHandler
Next

Where XXXXX might be Me or a panel, groupbox etc – wherever the buttons are.

More Related Contents:

  1. .NET Events – What are object sender & EventArgs e?
  2. variable/property changed event in vb.net
  3. Understanding events and event handlers in C#
  4. Reference variables and objects elsewhere in a form
  5. Parse Delimited CSV in .NET
  6. Is the Microsoft.VisualBasic namespace “true .NET” code?
  7. How do you get a string from a MemoryStream?
  8. Which is generally best to use — StringComparison.OrdinalIgnoreCase or StringComparison.InvariantCultureIgnoreCase?
  9. How do I create an event handler for a programmatically created object in VB.NET?
  10. BitmapImage in WPF does lock file
  11. Using IDisposable to unsubscribe events
  12. Does End Using close an open SQL Connection
  13. Does this code prevent SQL injection?
  14. Option Strict On and .NET for VB6 programmers
  15. Deserialize using JSON.net
  16. Cause this VB6-like smell, which VB.NET allows, to error instead: WinFormType.InstanceProp=Value [DISABLE My.Forms]
  17. How to print datagridview table with its header in vb.net?
  18. How to draw a signature and save it to disc as a Bitmap?
  19. Form’s TransparencyKey leaves ghastly colored edging [closed]
  20. Redirect Trace output to Console
  21. Accept self-signed TLS/SSL certificate in VB.NET
  22. How to make a Windows Forms .NET application display as tray icon?
  23. LinqToSql declare and instantiate DataContext best practice?
  24. Process.Start a file without Extension
  25. How to prevent value changed events from firing on form initialization in .NET?
  26. Custom button captions in .NET messagebox?
  27. .NET — Textbox control – wait till user is done typing
  28. How to post a file via HTTP post in vb.net
  29. How to securely store a connection string in a WinForms application?
  30. VB.NET Excel Program Leaves EXCEL.EXE floating after completion

Leave a Comment