Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>It might not actually be locked up - it's probably that the code that is executing is running on the same thread as the UI, so it LOOKS like it's locked up. Obviously if you're stepping through the code, you can see that it's actually doing something, but when some process is going on that freezes the UI it often appears to be locked up.</p> <p>Look for extensive loops or processes that take time to complete, and try running them on a different thread and see if that takes care of it. You can also tell if your app is actually frozen or if it's just running a long process by looking at the CPU usage in the Task Manager.</p> <p>As a temporary measure, you could try to do something during loops that you suspect may be causing this by doing something to update the UI. For example, in a WinForms application, you can add code to show where you are in the loop by adding a label and modifying the text.</p> <p>For example:</p> <pre><code>for (each Employee currentEmployee in myEmployees) { lblStatus.Text = "working on " + currentEmployee.FullName; Application.DoEvents(); } </code></pre> <p>Updating the UI this way will slow down your app because calls to Application.DoEvents are expensive, BUT it will help to assure your users that the program is not locked up (if you keep it in production) or you could choose to leave it out of the final production version and just use it while developing/testing to see how the processing is going and assure yourself that the app is not locked up.</p>
    singulars
    1. This table or related slice is empty.
    1. POBugs which may be dispelled by the presence of a debugger
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USDavid
    1. USDavid
    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. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COYou're right, in this case I actually know that background threads are still working, because remote processes are still receiving network communications from the "frozen" process. However, if it were stuck in a loop or waiting on a lock stepping through should reveal exactly which loop/lock it's stuck on, which it doesn't.
      singulars
      1. PO
      1. USMartin
    2. COUsing Control.Begin/Invoke or BackgroundWorker.ReportProgress too often has this effect as well. The UI thread is flooded with invoke requests and doesn't get around to doing its normal duties anymore. Like painting or checking input. Calling DoEvents won't fix it, only invoking less does.
      singulars
      1. PO
      1. USHans Passant
 

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