dispose

Javascript: know when an object will be garbaged

Hi all, is there a way to know when an object will be disposed by GC? My object (call it A) write some variables in a global array-object, so when the object will be garbaged its own variable will stay in the global array-object, taking up memory. ps. i have numerous objects A and i prefer to not call "manually" a method to free my glo...

C# Why Accesing ListBox.SelectedItem.ToString(), the form tries to dispose?

Hey Guys. I'm developing a small POS for a university proyect. I have a form who acts as a POS main window, with a datagrid and so on. Also, i have one form who is the Sensitive search or Incremental search, and i want that form to, select one item in a listbox and return it to the main window. Now i have a property in the main wich gets...

.NET WinForms application not releasing components?

Hello: I'm working with a .NET 2.0 WinForms application in C#. I noticed something that I thought to be strange during the tear down of my application. In the designer generated dispose method: protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dis...

Does garbage collector call Dispose()?

I thought the GC would call Dispose eventually if your program did not but that you should call Dispose() in your program just to make the cleanup deterministic. However, from my little test program, I don't see Dispose getting called at all.... public class Test : IDisposable { static void Main(string[] args) { Test s ...

C#: Is there an Advantage to Disposing Resources in Reverse Order of their Allocation?

Many years ago, I was admonished to, whenever possible, release resources in reverse order to how they were allocated. That is: block1 = malloc( ... ); block2 = malloc( ... ); ... do stuff ... free( block2 ); free( block1 ); I imagine on a 640K MS-DOS machine, this could minimize heap fragmentation. Is there any practical advantage ...

C# abstract Dispose method

I have an abstract class that implements IDisposable, like so: public abstract class ConnectionAccessor : IDisposable { public abstract void Dispose(); } In Visual Studio 2008 Team System, I ran Code Analysis on my project and one of the warnings that came up was the following: Microsoft.Design : Modify 'ConnectionAccessor.Dis...

When do I need to dispose objects in VBA

While looking at this code (most of which has been removed for simplification of this question), I started to wonder if I need to dispose of the collection or class that I used. Option Explicit Private terminals As Collection Sub BuildTerminalSummary() Dim terminal As clsTerminal Call LoadTerminals For Each terminal in termin...

GarbageCollector, Dispose or static Methods?

Hi guys, I developed a few classes last month. They grow big (round 30-40 Methods each class). I never take a thought of Memory Leaks, GarbageColletor or something like this (I must say this is my first own big project). Now I have classes with Methods, 15 Classes Round About, each class min. 20 methods. 50% are Linq-Classes in the DA...

C#: Do I need to dispose a BackgroundWorker created at runtime?

I typically have code like this on a form: private void PerformLongRunningOperation() { BackgroundWorker worker = new BackgroundWorker(); worker.DoWork += delegate { // perform long running operation here }; worker.RunWorkerAsync(); } This means that I don't dispose the...

How-to do the clean up ?

I have this code. A base class that create a new instance of the context. public class Base { private Entities context; public Base() { context = new Entities(); } } And than the classes that inherit from this class. public class SomeService : Base { public Gallery Get(int id) { ...

C# AutoSave cleanup; best practice?

I've got a class that represents a document (GH_Document). GH_Document has an AutoSave method on it which is called prior to every potentially dangerous operation. This method creates (or overwrites) an AutoSave file next to the original file. GH_Document also contains a method called DestroyAutoSaveFiles() which removes any and all fil...

Is SqlCommand.Dispose() required if associated SqlConnection will be disposed?

I usually use code like this: using (var connection = new SqlConnection(ConfigurationManager.ConnectionStrings["MyConn"].ConnectionString)) { var command = connection.CreateCommand(); command.CommandText = "..."; connection.Open(); command.ExecuteNonQuery(); } Will my command automatically disposed? Or not and I have to wr...

Understanding Streams and their lifetime (Flush, Dispose, Close)

Note: I've read the following two questions already: Can you explain the concept of streams? C# using streams I'm coding in C# In almost all code samples that use streams, .Dispose(), .Flush(), .Close() are almost always called. In the concept of a stream, what does accomplish? If I don't dispose a stream that I stored in a variabl...

Avoid calling Invoke when the control is disposed

I have the following code in my worker thread (ImageListView below is derived from Control): if (mImageListView != null && mImageListView.IsHandleCreated && !mImageListView.IsDisposed) { if (mImageListView.InvokeRequired) mImageListView.Invoke( new RefreshDelegateInternal(mImageListView.RefreshInternal))...

detecting undisposed web service calls (ASP.NET)

I'm inheriting a legacy project, and there's a page that calls a method that makes a web service call. Load and performance testing has detected that this page sometimes takes a really long time to close, but usually it's fine, and if there is one hanging, all other requests for that page hang until the first one resolves, and then they...

C# memory and dispose related questions.

I have the following piece of code, just wanted to check who will call the dispose? is it called automatically. ToolTip toolTip = new ToolTip(); toolTip.SetToolTip(button, toolTipText); Also let say I create a Timer local variable, who will call the dispose, what about memory leaks, as, if I call the dispose right away, the timer even...

Does calling Clear disposes the items also?

Many times there is a clear method, that removes all the items from the collections, are these items disposed also. Like, toolStripMenuItem.DropDownItems.Clear(); is sufficient, or should I have to call like that: foreach (ToolStripItem item in toolStripMenuItem.DropDownItems) { toolStripMenuItem.DropDownItems.Remove(item); ite...

Clear controls does not dispose them - what is the risk?

Hello There are multiple threads(a, b, c etc.) about the fact that Clear() ing items in the .NET component containers does not Dispose them(by calling Dispose(true). Most frequently, IMHO, the Clear-ed components are not used anymore in the application, so it needs explicitly be Disposed after Clearing them from the parent containers. ...

why do we need Dispose() method on some object? why doesnt the garbage collector does this work?

the question is why we need to call dispose() on some objects? why doesnt the garbage collector collect the object when it goes out of scope? i am trying to understand the reason why it was implemented like that. i mean it would be easier if object when the garbage collector collected out of scope objects. thanks ...

How bad is it to not dispose() in Powershell?

Sometimes we need to perform small administrative tasks in SharePoint. A simple PowerShell script is a really good tool for that. For instance, such script can enumerate event handlers of a list: [System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint") $site = new-object Microsoft.SharePoint.SPSite($args[0]) $site.Ro...