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<h1>ADO LockType Property</h1>
<hr />
<a href="ado_ref_recordset.asp"><img class="navup" src="../images/up.gif" alt="Recordset Object Reference" border="0" /> Complete Recordset Object Reference</a>
<hr />
<p>The LockType property sets or returns a <a href="#LockTypeEnum"> LockTypeEnum</a> value that specifies the type of locking
when editing a record in a Recordset. Default is adLockReadOnly. This property
is read/write on a closed Recordset and read-only on an open Recordset.
</p>
<p><b>Note:</b> Set this property before opening the Recordset.
</p>
<p><b>Note:</b> Not all providers support all lock types. If the requested LockType
setting is not supported, the provider will choose another type of locking. You
can use the Supports method to determine the actual locking functionality available in a Recordset
object.
</p>
<p><b>Note:</b> adLockPessimistic is not supported if CursorLocation is set to
adUseClient.
</p>
<h3>Syntax
</h3>
<table class="ex" cellspacing="0" border="1" width="100%" cellpadding="3">
<tr>
<td valign="top">
<pre>objRecordset.LockType</pre>
</td>
</tr>
</table>
<h3>Example</h3>
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<pre><%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open(Server.Mappath("northwind.mdb"))
set rs=Server.CreateObject("ADODB.recordset")
sql="SELECT * FROM Customers"</pre>
<pre>rs.CursorLocation=adUseClient
rs.CursorType=adOpenStatic
rs.LockType=adLockBatchOptimistic</pre>
<pre>rs.Open sql,conn</pre>
<pre>rs.Close
conn.Close
%></pre>
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<hr />
<a name="LockTypeEnum"><h3>LockTypeEnum Values</h3></a>
<table class="ex" cellspacing="0" border="1" width="100%" cellpadding="3">
<tr valign="top" align="left">
<th width="30%">Constant</th>
<th width="10%">Value</th>
<th width="60%">Description</th>
</tr>
<tr valign="top">
<td>adLockUnspecified</td>
<td>-1</td>
<td>Unspecified type of lock. Clones inherits lock type from the original
Recordset.</td>
</tr>
<tr valign="top">
<td>adLockReadOnly</td>
<td>1</td>
<td>Read-only records</td>
</tr>
<tr valign="top">
<td>adLockPessimistic</td>
<td>2</td>
<td>Pessimistic locking, record by record. The provider lock records
immediately after editing</td>
</tr>
<tr valign="top">
<td>adLockOptimistic</td>
<td>3</td>
<td>Optimistic locking, record by record. The provider lock records only
when calling update</td>
</tr>
<tr valign="top">
<td>adLockBatchOptimistic</td>
<td>4</td>
<td>Optimistic batch updates. Required for batch update mode</td>
</tr>
</table>
<br />
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<a href="ado_ref_recordset.asp"><img class="navup" src="../images/up.gif" alt="Recordset Object Reference" border="0" /> Complete Recordset Object Reference</a>
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