Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 125
  • Last Modified:

What is Best Event Handler to Dispose of Unmanaged Objects?

Where is Best Event Handler to Dispose of Unmanaged Objects? FormClosing or FormClosed? Using VB.net 2005.
0
gcook17
Asked:
gcook17
  • 3
  • 2
1 Solution
 
Jacques Bourgeois (James Burger)PresidentCommented:
It depends on where they are declared, at what scope, and the way you use them.

The best place to dispose of objects is usually as soon as you do not need them anymore.

And for Unmanaged objects, you do not really dispose of them, you release them, often with the ReleaseComObject method.
0
 
gcook17Author Commented:
OK thanks. The objects are created at Form_Load and used until form is closed.
0
 
gcook17Author Commented:
Sorry I meant to say "managed" not "unmanaged"
0
Granular recovery for Microsoft Exchange

With Veeam Explorer for Microsoft Exchange you can choose the Exchange Servers and restore points you’re interested in, and Veeam Explorer will present the contents of those mailbox stores for browsing, searching and exporting.

 
ChloesDadCommented:
If they need disposing then there is an overridable method called Dispose on every form

    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        Try
            If disposing AndAlso components IsNot Nothing Then
                components.Dispose()
            End If
        Finally
            MyBase.Dispose(disposing)
        End Try
    End Sub

Open in new window


add your code in there as required
0
 
Jacques Bourgeois (James Burger)PresidentCommented:
If these are controls, and if you added them to the Controls collection of the form as you should normally do when adding controls dynamically, you have nothing to do. The Dispose method mentioned by ChloesDad will do the job for you.

If they are not controls and are used only in Form_Load, then you dispose of them as soon has they are not needed.

If they are used in many places in the form and you know a time when they will not be needed anymore, then dispose of them at that point.

If they are used in many places in the form and you cannot determine a point where they will not be needed anymore, then Form_Closing is a good place.
0
 
gcook17Author Commented:
These are database objects and are used potentially till form is closed. Therefore I will place in Form_Closing Event handler. Previously most were in Form_Closed. Thank you.
0

Featured Post

NFR key for Veeam Backup for Microsoft Office 365

Veeam is happy to provide a free NFR license (for 1 year, up to 10 users). This license allows for the non‑production use of Veeam Backup for Microsoft Office 365 in your home lab without any feature limitations.

  • 3
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now