Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>We don't know the details of your code but the fact that your class library needs to be aware of when the process is exiting might indicate a design flaw of your application.</p> <p>If you need to release resources or clean up other things in a deterministic way you should have a look at the <code>IDisposable</code> interface. If the classes exposed by your library implement this interface caller can state easily that they no longer need the dll functionality by calling <code>Dispose()</code>. </p> <p>Maybe a good starting point for further reading are the following articles:</p> <blockquote> <ul> <li><p><strong><a href="http://msdn.microsoft.com/en-us/library/fs2xkftw.aspx" rel="nofollow noreferrer">MSDN: Implementing a Dispose Method</a></strong></p></li> <li><p><strong><a href="http://www.codeproject.com/KB/dotnet/idisposable.aspx" rel="nofollow noreferrer">IDisposable: What Your Mother Never Told You About Resource Deallocation</a></strong></p></li> </ul> </blockquote> <p>For example you could have the following class in your class library:</p> <pre><code>using System; using System.IO; public class ResourceManager : IDisposable { private Stream _resource; private bool _disposed; public void Dispose() { Dispose(true); // Use SupressFinalize in case a subclass // of this type implements a finalizer. GC.SuppressFinalize(this); } public void Dispose(bool disposing) { if (!_disposed) { if (disposing) { Console.WriteLine("Exiting Process. Cleaning up."); // free resources here if (_resource != null) _resource.Dispose(); Console.WriteLine("Object disposed."); } // Indicate that the instance has been disposed. _resource = null; _disposed = true; } } } </code></pre> <p>In your main module you can then use in the following way; the <code>using</code> statement will guarantee that the <code>Dispose()</code> method is called:</p> <pre><code>using System; using System.Windows.Forms; static class Program { /// &lt;summary&gt; /// The main entry point for the application. /// &lt;/summary&gt; [STAThread] static void Main() { using (ResourceManager manager = new ResourceManager()) { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Form1()); } } } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. PONeed to know when application is closing
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USDirk Vollmar
    1. USDirk Vollmar
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTDownMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COIt is a device driver, and as such needs to release the device and if possible set it back to a neutral state when the application using it leaves and does not do its duty of cleaning up. Therefore I need it to be in the DLL. When a program uses the dll, it might not call disposable, it might just leave. It will be used by myself in my program as well as others' that might not have the same coding.
      singulars
      1. PO
      1. USNick
    2. CO@Nick: Releasing unmangaged resources like your device is exactly the scenario for using `IDisposable()`.
      singulars
      1. PO
      1. USDirk Vollmar
    3. COBut if people dont use dispose, or using, then it will not be called right?
      singulars
      1. PO
      1. USNick
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload