Sophie

Sophie

distrib > Fedora > 15 > i386 > by-pkgid > 864d1c3c3cd8df4e3a2692faf8776e05 > files > 1173

db4o-doc-7.4-2.fc13.i686.rpm

<html>
  <head>
    <META http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>Debug Messaging System</title>
    <link rel="stylesheet" type="text/css" href="../../../style.css">
  </head>
  <body>
    <div class="CommonContent">
      <div class="CommonContentArea">
        <h1>Debug Messaging System</h1><script>
//We attach this function to a browser object as a variable so that if multiple of these blocks are
//present on the same page, then they will simply over-write eachother with the same function instead
//of generating a naming collision.
window.WikiCodeFormattingCopyToClipboard = function copyToClipboard(sID){
	var sContent = document.getElementById(sID).innerText;
	if( window.clipboardData && clipboardData.setData )
	{
		clipboardData.setData("Text", sContent);
	}
	else
	{
		alert("You must enable javascript access to your clipboard for this feature to work. Please referr to your browser documentation or Google search for instructions.");
	}
}
</script>

<p>Db4o messaging system is a special tool, which makes db4o functionality more transparent to the user. It can be used:</p>
<ul>
<li>
in debugging session - to find out where the problem can reside;</li>
<li>for learning - to watch, what does db4o actually do with the objects.</li>
</ul>
<p>In order to activate messaging before opening a database file use:</p>



<span name="cs_wiki_filter" csw_filters="cs">
<p>c#: </p><p><code></p><p>configuration.MessageLevel(level)</code></p>
</span>

<span name="cs_wiki_filter" csw_filters="vb">
<p>VB: </p><p><code>configuration.MessageLevel(level)</code></p>
</span>

<p>where <i>level</i> can be:</p>
<p>level = 0: no messages;</p>
<p>level &gt; 0: normal messages;</p>
<p>level &gt; 1: state messages (new object, object update, delete);</p>
<p>level &gt; 2: activation messages (object activated, deactivated).</p>
<p>In order to set up a convenient output stream for the messages, call:</p>



<span name="cs_wiki_filter" csw_filters="cs">
<p>c#: </p><p><code>configuration.SetOut(outStream) </code></p><p>By default the output is sent to System.Console.Out.<br></p></span>

<span name="cs_wiki_filter" csw_filters="vb">
<p>VB: </p><p><code>configuration.SetOut(outStream) </code></p><p>By default the output is sent to System.Console.Out.<br></p></span><p>For more information on #setOut call see <a href="customizing_the_debug_message_output.html" class="wikiLink">Customizing The Debug Message Output</a>.&nbsp;</p>


<p>#messageLevel(level) also can be set after a database has been opened:</p>



<span name="cs_wiki_filter" csw_filters="cs">
<p>c#: <code>IObjectContainer.Ext().Configure().MessageLevel(level) </code></p>
</span>
<span name="cs_wiki_filter" csw_filters="vb">
<p>VB: <code>IObjectContainer.Ext().Configure().MessageLevel(level) </code></p>
</span>
<p>The same applies for #setOut().</p>
<p>Let's use the simplest example to see all types of debug messages:</p>



<span name="cs_wiki_filter" csw_filters="cs">
<div class="FormattedSourceCode"><div class="fscHeader"><span class="fscFileName">DebugExample.cs: <span class="fscMemberName">SetCars</span></span></div><div class="fscCode"><pre ID="ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53"><div><!--

Code highlighting produced by Actipro CodeHighlighter (freeware)
http://www.CodeHighlighter.com/

--><span style="color: #008080;">01</span><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/None.gif" align="top"/><span style="color: #0000FF;">private</span><span style="color: #000000;"> </span><span style="color: #0000FF;">static</span><span style="color: #000000;"> </span><span style="color: #0000FF;">void</span><span style="color: #000000;"> SetCars()
</span><span style="color: #008080;">02</span><span style="color: #000000;"><img id="ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_32_685_Open_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedBlockStart.gif" align="top" onClick="this.style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_32_685_Open_Text').style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_32_685_Closed_Image').style.display='inline'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_32_685_Closed_Text').style.display='inline';"/><img id="ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_32_685_Closed_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ContractedBlock.gif" align="top" style="display: none;" onClick="this.style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_32_685_Closed_Text').style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_32_685_Open_Image').style.display='inline'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_32_685_Open_Text').style.display='inline';"/>    </span><span id="ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_32_685_Closed_Text" style="border: solid 1px #808080; background-color: #FFFFFF; display: none;">...</span><span id="ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_32_685_Open_Text"><span style="color: #000000;">{
</span><span style="color: #008080;">03</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>            </span><span style="color: #008000;">//</span><span style="color: #008000;"> Set the debug message levet to the maximum</span><span style="color: #008000;">
</span><span style="color: #008080;">04</span><span style="color: #008000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/></span><span style="color: #000000;">            IConfiguration configuration </span><span style="color: #000000;">=</span><span style="color: #000000;"> Db4oFactory.NewConfiguration();
</span><span style="color: #008080;">05</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>            configuration.MessageLevel(</span><span style="color: #800080;">3</span><span style="color: #000000;">);
</span><span style="color: #008080;">06</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>            </span><span style="color: #008000;">//</span><span style="color: #008000;"> Do some db4o operations</span><span style="color: #008000;">
</span><span style="color: #008080;">07</span><span style="color: #008000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/></span><span style="color: #000000;">      File.Delete(Db4oFileName);
</span><span style="color: #008080;">08</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>            IObjectContainer db </span><span style="color: #000000;">=</span><span style="color: #000000;"> Db4oFactory.OpenFile(configuration, Db4oFileName);
</span><span style="color: #008080;">09</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>      </span><span style="color: #0000FF;">try</span><span style="color: #000000;"> 
</span><span style="color: #008080;">10</span><span style="color: #000000;"><img id="ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_375_642_Open_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedSubBlockStart.gif" align="top" onClick="this.style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_375_642_Open_Text').style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_375_642_Closed_Image').style.display='inline'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_375_642_Closed_Text').style.display='inline';"/><img id="ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_375_642_Closed_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ContractedSubBlock.gif" align="top" style="display: none;" onClick="this.style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_375_642_Closed_Text').style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_375_642_Open_Image').style.display='inline'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_375_642_Open_Text').style.display='inline';"/>      </span><span id="ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_375_642_Closed_Text" style="border: solid 1px #808080; background-color: #FFFFFF; display: none;">...</span><span id="ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_375_642_Open_Text"><span style="color: #000000;">{
</span><span style="color: #008080;">11</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>        Car car1 </span><span style="color: #000000;">=</span><span style="color: #000000;"> </span><span style="color: #0000FF;">new</span><span style="color: #000000;"> Car(</span><span style="color: #800000;">&quot;</span><span style="color: #800000;">BMW</span><span style="color: #800000;">&quot;</span><span style="color: #000000;">);
</span><span style="color: #008080;">12</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>        db.Set(car1);
</span><span style="color: #008080;">13</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>        Car car2 </span><span style="color: #000000;">=</span><span style="color: #000000;"> </span><span style="color: #0000FF;">new</span><span style="color: #000000;"> Car(</span><span style="color: #800000;">&quot;</span><span style="color: #800000;">Ferrari</span><span style="color: #800000;">&quot;</span><span style="color: #000000;">);
</span><span style="color: #008080;">14</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>        db.Set(car2);
</span><span style="color: #008080;">15</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>        db.Deactivate(car1,</span><span style="color: #800080;">2</span><span style="color: #000000;">);
</span><span style="color: #008080;">16</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>        IQuery query </span><span style="color: #000000;">=</span><span style="color: #000000;"> db.Query();
</span><span style="color: #008080;">17</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>        query.Constrain(</span><span style="color: #0000FF;">typeof</span><span style="color: #000000;">(Car));
</span><span style="color: #008080;">18</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>        IObjectSet results </span><span style="color: #000000;">=</span><span style="color: #000000;"> query.Execute();
</span><span style="color: #008080;">19</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>        ListResult(results);
</span><span style="color: #008080;">20</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedSubBlockEnd.gif" align="top"/>      }</span></span><span style="color: #000000;"> 
</span><span style="color: #008080;">21</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>      </span><span style="color: #0000FF;">finally</span><span style="color: #000000;"> 
</span><span style="color: #008080;">22</span><span style="color: #000000;"><img id="ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_659_681_Open_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedSubBlockStart.gif" align="top" onClick="this.style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_659_681_Open_Text').style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_659_681_Closed_Image').style.display='inline'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_659_681_Closed_Text').style.display='inline';"/><img id="ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_659_681_Closed_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ContractedSubBlock.gif" align="top" style="display: none;" onClick="this.style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_659_681_Closed_Text').style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_659_681_Open_Image').style.display='inline'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_659_681_Open_Text').style.display='inline';"/>      </span><span id="ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_659_681_Closed_Text" style="border: solid 1px #808080; background-color: #FFFFFF; display: none;">...</span><span id="ResourcesReferenceTuningDebugging_Db4odebuggingCS.ZipsDebugExample.Cs_DebugExample.Cs_SetCars_1967_53_659_681_Open_Text"><span style="color: #000000;">{
</span><span style="color: #008080;">23</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>        db.Close();
</span><span style="color: #008080;">24</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedSubBlockEnd.gif" align="top"/>      }</span></span><span style="color: #000000;">
</span><span style="color: #008080;">25</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedBlockEnd.gif" align="top"/>    }</span></span></div></pre></div></div>
</span>

<span name="cs_wiki_filter" csw_filters="vb">
<div class="FormattedSourceCode"><div class="fscHeader"><span class="fscFileName">DebugExample.vb: <span class="fscMemberName">SetCars</span></span></div><div class="fscCode"><pre ID="ResourcesReferenceTuningDebugging_Db4odebuggingVB.ZipsDebugExample.Vb_DebugExample.Vb_SetCars_2080_53"><div><!--

Code highlighting produced by Actipro CodeHighlighter (freeware)
http://www.CodeHighlighter.com/

--><span style="color: #008080;">01</span><img id="ResourcesReferenceTuningDebugging_Db4odebuggingVB.ZipsDebugExample.Vb_DebugExample.Vb_SetCars_2080_53_15_864_Open_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedBlockStart.gif" align="top" onClick="this.style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingVB.ZipsDebugExample.Vb_DebugExample.Vb_SetCars_2080_53_15_864_Open_Text').style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingVB.ZipsDebugExample.Vb_DebugExample.Vb_SetCars_2080_53_15_864_Closed_Image').style.display='inline'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingVB.ZipsDebugExample.Vb_DebugExample.Vb_SetCars_2080_53_15_864_Closed_Text').style.display='inline';"/><img id="ResourcesReferenceTuningDebugging_Db4odebuggingVB.ZipsDebugExample.Vb_DebugExample.Vb_SetCars_2080_53_15_864_Closed_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ContractedBlock.gif" align="top" style="display: none;" onClick="this.style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingVB.ZipsDebugExample.Vb_DebugExample.Vb_SetCars_2080_53_15_864_Closed_Text').style.display='none'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingVB.ZipsDebugExample.Vb_DebugExample.Vb_SetCars_2080_53_15_864_Open_Image').style.display='inline'; document.getElementById('ResourcesReferenceTuningDebugging_Db4odebuggingVB.ZipsDebugExample.Vb_DebugExample.Vb_SetCars_2080_53_15_864_Open_Text').style.display='inline';"/><span style="color: #0000FF;">Private</span><span style="color: #000000;"> </span><span style="color: #0000FF;">Shared</span><span style="color: #000000;"> </span><span id="ResourcesReferenceTuningDebugging_Db4odebuggingVB.ZipsDebugExample.Vb_DebugExample.Vb_SetCars_2080_53_15_864_Closed_Text" style="border: solid 1px #808080; background-color: #FFFFFF; display: none;">Sub SetCars()</span><span id="ResourcesReferenceTuningDebugging_Db4odebuggingVB.ZipsDebugExample.Vb_DebugExample.Vb_SetCars_2080_53_15_864_Open_Text"><span style="color: #0000FF;">Sub</span><span style="color: #000000;"> SetCars()
</span><span style="color: #008080;">02</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>            </span><span style="color: #008000;">'</span><span style="color: #008000;"> Set the debug message levet to the maximum</span><span style="color: #008000;">
</span><span style="color: #008080;">03</span><span style="color: #008000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/></span><span style="color: #000000;">            </span><span style="color: #0000FF;">Dim</span><span style="color: #000000;"> configuration </span><span style="color: #0000FF;">As</span><span style="color: #000000;"> IConfiguration </span><span style="color: #000000;">=</span><span style="color: #000000;"> Db4oFactory.NewConfiguration()
</span><span style="color: #008080;">04</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>            configuration.MessageLevel(</span><span style="color: #800080;">3</span><span style="color: #000000;">)
</span><span style="color: #008080;">05</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>            </span><span style="color: #008000;">'</span><span style="color: #008000;"> Do some db4o operations</span><span style="color: #008000;">
</span><span style="color: #008080;">06</span><span style="color: #008000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/></span><span style="color: #000000;">            File.Delete(Db4oFileName)
</span><span style="color: #008080;">07</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>            </span><span style="color: #0000FF;">Dim</span><span style="color: #000000;"> db </span><span style="color: #0000FF;">As</span><span style="color: #000000;"> IObjectContainer </span><span style="color: #000000;">=</span><span style="color: #000000;"> Db4oFactory.OpenFile(configuration, Db4oFileName)
</span><span style="color: #008080;">08</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>            </span><span style="color: #0000FF;">Try</span><span style="color: #000000;">
</span><span style="color: #008080;">09</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>                </span><span style="color: #0000FF;">Dim</span><span style="color: #000000;"> car1 </span><span style="color: #0000FF;">As</span><span style="color: #000000;"> Car </span><span style="color: #000000;">=</span><span style="color: #000000;"> </span><span style="color: #0000FF;">New</span><span style="color: #000000;"> Car(</span><span style="color: #800000;">&quot;</span><span style="color: #800000;">BMW</span><span style="color: #800000;">&quot;</span><span style="color: #000000;">)
</span><span style="color: #008080;">10</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>                db.Set(car1)
</span><span style="color: #008080;">11</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>                </span><span style="color: #0000FF;">Dim</span><span style="color: #000000;"> car2 </span><span style="color: #0000FF;">As</span><span style="color: #000000;"> Car </span><span style="color: #000000;">=</span><span style="color: #000000;"> </span><span style="color: #0000FF;">New</span><span style="color: #000000;"> Car(</span><span style="color: #800000;">&quot;</span><span style="color: #800000;">Ferrari</span><span style="color: #800000;">&quot;</span><span style="color: #000000;">)
</span><span style="color: #008080;">12</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>                db.Set(car2)
</span><span style="color: #008080;">13</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>                db.Deactivate(car1, </span><span style="color: #800080;">2</span><span style="color: #000000;">)
</span><span style="color: #008080;">14</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>                </span><span style="color: #0000FF;">Dim</span><span style="color: #000000;"> query </span><span style="color: #0000FF;">As</span><span style="color: #000000;"> IQuery </span><span style="color: #000000;">=</span><span style="color: #000000;"> db.Query()
</span><span style="color: #008080;">15</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>                query.Constrain(</span><span style="color: #0000FF;">GetType</span><span style="color: #000000;">(Car))
</span><span style="color: #008080;">16</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>                </span><span style="color: #0000FF;">Dim</span><span style="color: #000000;"> results </span><span style="color: #0000FF;">As</span><span style="color: #000000;"> IObjectSet </span><span style="color: #000000;">=</span><span style="color: #000000;"> query.Execute()
</span><span style="color: #008080;">17</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>                ListResult(results)
</span><span style="color: #008080;">18</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>            </span><span style="color: #0000FF;">Finally</span><span style="color: #000000;">
</span><span style="color: #008080;">19</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>                db.Close()
</span><span style="color: #008080;">20</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/>            </span><span style="color: #0000FF;">End</span><span style="color: #000000;"> </span><span style="color: #0000FF;">Try</span><span style="color: #000000;">
</span><span style="color: #008080;">21</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedBlockEnd.gif" align="top"/>        </span><span style="color: #0000FF;">End Sub</span></span></div></pre></div></div>
</span>

<p>Output looks quite messy, but allows you to follow the whole process. For debugging purposes messaging system provides a timestamp and internal ID information for each object (first number in state and activate messages).</p></div>
    </div>
    <div id="footer">
					This revision (13) was last Modified 2007-05-07T16:52:30 by Tetyana.
				</div>
  </body>
</html>