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    <h2>Accessing a control from different threads</h2> <p>In <code>WinForms App</code> you can ony access directly a <code>Control</code> from the thread it was created. To do such a task you will need to use <a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.control.invokerequired.aspx" rel="nofollow">InvokeRequired</a> property of a control to see if you must use <a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.control.invoke.aspx" rel="nofollow">Invoke</a> inorder to force a call of the action from the original thread.<br><br> A public method that might be accessed from any thread including the original would look like this:</p> <pre><code>public void run() { if (label1.InvokeRequired) //Is this method being called from a different thread this.Invoke(new MethodInvoker(()=&gt; label1.Text = CONNECTING)); else //it's cool, this is the original thread, procceed label1.Text = CONNECTING; } </code></pre> <p><br> But if you are absolutly sure that <code>run()</code> method will be called only from the thread, consider not even checking if <code>InvokeRequired</code> and immediatly call <code>Invoke</code><br><br> Further information: <a href="http://msdn.microsoft.com/en-us/library/ms171728(v=vs.80).aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/ms171728(v=vs.80).aspx</a></p> <h2>Stopping a thread in progress</h2> <ul> <li><p>Simples is to use <a href="http://msdn.microsoft.com/en-us/library/system.threading.thread.abort.aspx" rel="nofollow">t1.Abort();</a> method of a <code>Thread</code>. This will throw and exception forcing it to stop where ever it was. this is great for threads that do not do any long processing so stopping it won't cause any problems.</p></li> <li><p>If you do do proccesing in your thread, which means you can't just stop it in the middle then I suggest you to use a boolean that will indicate that the thread must cancel ASAP. <br></p></li> </ul> <p> <pre><code>private bool isCancelRequired = false; public void run() { while(true) { //do long processing.. if (isCancelRequired) break; } } </code></pre> <ul> <li>More advanced methods: <a href="http://www.yoda.arachsys.com/csharp/threads/shutdown.shtml" rel="nofollow">http://www.yoda.arachsys.com/csharp/threads/shutdown.shtml</a></li> </ul>
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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.

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