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</script><link href="../PRODUCT_PLUGIN/book.css" rel="stylesheet" type="text/css"/><link href="css/s60/style.css" rel="stylesheet" type="text/css" media="all"/></head><body onload="initPage();"><div class="body"><div class="contentLeft prTxt"><h1 class="pageHeading" id="GUID-6D7228E7-8E06-495D-85F7-A4B1716D4CDE">IDataSource.Cancel()</h1><div>
<p><strong>Description:</strong></p>
<p>The <code>Cancel</code> method cancels an ongoing asynchronous
call made with a Landmarks Service API method.</p>
<p>This is a synchronous method.</p>
<p><strong>Syntax:</strong></p>
<pre class="codeblock" id="GUID-AAC5AE0D-6576-4C80-B19F-82A68BDD0E76">result = so.IDataSource.Cancel(criteria);</pre>
<p><strong>Arguments:</strong></p>
<ul>
<li><p><code>criteria</code>:</p>
<p>This is an object with the <code>TransactionID</code> property
(number). <code>criteria.TransactionID</code> specifies the transaction
ID of the asynchronous call to cancel. The transaction ID is the <code>result.TransactionID</code> value
that was returned as part of the result of the initial call.</p>
</li>
</ul>
<p><strong>Return value:</strong></p>
<p>The <code>Cancel</code> method returns an object that contains
an error code and an error message.</p>
<div class="tablenoborder"><a name="GUID-118FCAE3-1483-4B90-8FFE-9E4D49156708"><!----></a><table cellpadding="4" cellspacing="0" summary="" id="GUID-118FCAE3-1483-4B90-8FFE-9E4D49156708" frame="border" border="1" rules="all"><caption><strong>Table: </strong>Return value
properties for Cancel</caption>
<thead align="left">
<tr class="title "><th class="cellrowborder" valign="top" width="33.33333333333333%" id="d0e43885">
<p>Property</p>
</th><th class="cellrowborder" valign="top" width="33.33333333333333%" id="d0e43890">
<p>Description</p>
</th><th class="cellrowborder" valign="top" width="33.33333333333333%" id="d0e43895">
<p>Value</p>
</th></tr>
</thead>
<tbody>
<tr class="">
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e43885 ">
<p><code>result.ErrorCode</code></p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e43890 ">
<p>This is a number that specifies a predefined error code.</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e43895 ">
<p>See <a href="GUID-0A215AF3-59F0-4158-842C-0D7B030E5EA4.html#GUID-0A215AF3-59F0-4158-842C-0D7B030E5EA4">Service API error codes</a>.</p>
</td>
</tr>
<tr class="bg ">
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e43885 ">
<p><code>result.ErrorMessage</code></p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e43890 ">
<p>This is a text string that describes the error.</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="d0e43895 ">
<p>See <a href="GUID-4ECCCBED-DE6D-4366-B037-90E874C4DF5C.html#GUID-4ECCCBED-DE6D-4366-B037-90E874C4DF5C">Landmarks Service API error messages</a>.</p>
</td>
</tr>
</tbody>
</table></div>
<p><strong>Example code:</strong></p>
<p/>
<p>For the complete source of a sample widget that demonstrates how to
use this Service API, see <a href="GUID-11D59F76-EC4C-4297-B262-D5174E826B43.html#GUID-11D59F76-EC4C-4297-B262-D5174E826B43">the
full example</a>.</p>
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