<?xml version="1.0" encoding="UTF-8"?>
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Documentation for LCL (Lazarus Component Library) and LazUtils (Lazarus 
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Copyright (c) 1997-2025, by the Lazarus Development Team.

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<fpdoc-descriptions>
<package name="lcl">
<!--
====================================================================
DBActns
====================================================================
-->
<module name="DBActns">
<short>
Standard actions used to navigate and manipulate a dataset in a datasource.
</short>
<descr>
<p>
<file>dbactns.pp</file> contains classes used to implement 
<var>TDataSetAction</var> and its descendants. They are dataset-aware actions 
used to navigate and manipulate a dataset in a datasource.
</p>
<p>
<file>dbactns.pp</file> is part of the Lazarus Component Library (<b>LCL</b>).
</p>
<p>
The following components are registered but not displayed on the Lazarus IDE 
component palette:
</p>
<ul>
<li>TDataSetFirst</li>
<li>TDataSetLast</li>
<li>TDataSetNext</li>
<li>TDataSetPrior</li>
<li>TDataSetRefresh</li>
<li>TDataSetCancel</li>
<li>TDataSetDelete</li>
<li>TDataSetEdit</li>
<li>TDataSetInsert</li>
<li>TDataSetPost</li>
</ul>
</descr>

<element name="Classes"/>
<element name="DB"/>
<element name="ActnList"/>

<element name="TDataSetAction">
<short>
<var>TDataSetAction</var> is the base class for all other standard 
<var>TDataSet</var> actions.
</short>
<descr>
<p>
<var>TDataSetAction</var> is a <var>TAction</var> descendant that is the base 
class for all other standard <var>TDataSet</var> actions. TDataSetAction 
provides properties and methods which enables an action to be applied to a 
DataSource and its associated dataset.
</p>
<p>
<var>TDataSetAction</var> provides an overridden Notification method to 
perform component notifications when the <var>DataSource</var> is removed for 
the action. A virtual <var>GetDataSet</var> method is implemented to ensure 
that a <var>DataSource</var> is cast to a <var>TDataSource</var> class 
instance prior to accessing its dataset. The <var>HandlesTarget</var> method 
is overridden to determine if the class includes both a valid datasource and 
a dataset for a specified target.
</p>
<p>
Applications do not use instances of <var>TDataSetAction</var>; use one of 
the descendent classes that perform a specific action for a dataset.
</p>
</descr>
<seealso>
<link id="TDataSetFirst"/>
<link id="TDataSetLast"/>
<link id="TDataSetNext"/>
<link id="TDataSetPrior"/>
<link id="TDataSetRefresh"/>
<link id="TDataSetCancel"/>
<link id="TDataSetDelete"/>
<link id="TDataSetEdit"/>
<link id="TDataSetInsert"/>
<link id="TDataSetPost"/>
<link id="#lcl.actnlist.TAction">TAction</link>
</seealso>
</element>

<element name="TDataSetAction.FDataSource" link="#lcl.dbactns.TDataSetAction.DataSource"/>

<element name="TDataSetAction.SetDataSource">
<short>Sets the value for the DataSource property.</short>
<seealso>
<link id="TDataSetAction.DataSource"/>
</seealso>
</element>
<element name="TDataSetAction.SetDataSource.Value">
<short>New value for the property.</short>
</element>

<element name="TDataSetAction.Notification">
<short>
Performs a notification when the datasource for the component is removed.
</short>
<descr>
<p>
<var>Notification</var> is an overridden procedure used to perform a 
notification message when the specified component is removed. 
<var>AComponent</var> contains the component for the notification message. 
<var>Operation</var> contains the operation for the notification message.
</p>
<p>
<var>Notification</var> calls the inherited method. When <var>Operation</var> 
contains the value <var>opRemove</var> and <var>AComponent</var> contains the 
same class instance as the <var>DataSource</var> property, the 
<var>DataSource</var> property is set to <b>Nil</b>.
</p>
</descr>
<seealso>
<link id="TDataSetAction.DataSource"/>
</seealso>
</element>
<element name="TDataSetAction.Notification.AComponent">
<short>Component for the notification.</short>
</element>
<element name="TDataSetAction.Notification.Operation">
<short>Operation for the notification.</short>
</element>

<element name="TDataSetAction.GetDataSet">
<short>Gets the Dataset assigned to the specified target datasource.</short>
<descr/>
<seealso/>
</element>
<element name="TDataSetAction.GetDataSet.Result">
<short>TDataSet assigned to the specified target datasource.</short>
</element>
<element name="TDataSetAction.GetDataSet.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetAction.HandlesTarget">
<short>Indicates if the action is handled for the specified target.</short>
<descr/>
<seealso/>
</element>
<element name="TDataSetAction.HandlesTarget.Result">
<short>
<b>True</b> when a valid DataSource and DataSet exist in the Target.
</short>
</element>
<element name="TDataSetAction.HandlesTarget.Target">
<short>Object instance examined in the method.</short>
</element>

<element name="TDataSetAction.DataSource">
<short>
DataSource with the dataset for the action.
</short>
<descr>
<p>
<var>DataSource</var> is a <var>TDataSource</var> property which provides 
access to properties, methods, and events for the <var>TDataSet</var> used in 
the data source. Changing the value for <var>DataSource</var> causes a free 
notification message to be performed for the new class instance used as the 
value for the property.
</p>
</descr>
<seealso/>
</element>

<element name="TDataSetFirst">
<short>
<var>TDataSetFirst</var> moves to first record in the <var>DataSet</var>.
</short>
<descr>
<p>
<var>TDataSetFirst</var> is a <var>TDataSetAction</var> descendant which 
moves to the first record in the dataset for a DataSource. TDataSetFirst can 
be added to an action list and assigned to controls which perform the 
corresponding action.
</p>
<p>
<var>TDataSetFirst</var> publishes the <var>DataSource</var> property which 
explicitly declares the target for the database action. The DataSource may be 
determined by examining a data-aware control which used the database action, 
and passed an an argument to the UpdateTarget and HandlesTarget methods.
</p>
</descr>
<seealso>
<link id="TDataSetLast"/>
<link id="TDataSetNext"/>
<link id="TDataSetPrior"/>
<link id="TDataSetRefresh"/>
<link id="TDataSetCancel"/>
<link id="TDataSetDelete"/>
<link id="TDataSetEdit"/>
<link id="TDataSetInsert"/>
<link id="TDataSetPost"/>
<link id="TDataSetAction"/>
</seealso>
</element>

<element name="TDataSetFirst.ExecuteTarget">
<short>
Retrieves the dataset for the target datasource and calls its First method.
</short>
<descr/>
<seealso/>
</element>
<element name="TDataSetFirst.ExecuteTarget.Target">
<short>Target where the action is performed in the method.</short>
</element>

<element name="TDataSetFirst.UpdateTarget">
<short>
Enables or disables the action based on the state of the dataset in the 
target.
</short>
<descr>
<p>
<var>UpdateTarget</var> is an overridden method which enables or disables the 
database action based on the state of the dataset in the Target object. 
<var>UpdateTarget</var> calls the <var>GetDataSet</var> method to retrieve 
the dataset in the Target datasource. The action is Enabled when the dataset 
is active and not already positioned at its beginning (or first record). This 
ensures that the action cannot be performed for a dataset that has not been 
opened, or does not require repositioning.
</p>
</descr>
<seealso/>
</element>
<element name="TDataSetFirst.UpdateTarget.Target">
<short>Target datasource examined in the method.</short>
</element>

<element name="TDataSetFirst.DataSource" link="#lcl.dbactns.TDataSetAction.DataSource"/>

<element name="TDataSetLast">
<short>
<var>TDataSetLast</var> moves to last record in the <var>DataSet</var>.
</short>
<descr>
<p>
<var>TDataSetLast</var> is a <var>TDataSetAction</var> descendant which moves 
to the last record in the dataset for a DataSource. TDataSetLast can be added 
to an action list and assigned to controls which perform the corresponding 
action.
</p>
<p>
<var>TDataSetLast</var> publishes the DataSource property which explicitly 
declares the target for the database action. The DataSource may be determined 
by examining a data-aware control which used the database action, and passed 
an an argument to the UpdateTarget and HandlesTarget methods.
</p>
</descr>
<seealso>
<link id="TDataSetFirst"/>
<link id="TDataSetNext"/>
<link id="TDataSetPrior"/>
<link id="TDataSetRefresh"/>
<link id="TDataSetCancel"/>
<link id="TDataSetDelete"/>
<link id="TDataSetEdit"/>
<link id="TDataSetInsert"/>
<link id="TDataSetPost"/>
<link id="TDataSetAction"/>
</seealso>
</element>

<element name="TDataSetLast.ExecuteTarget">
<short>
Retrieves the dataset for the target datasource and calls its Last method.
</short>
<descr/>
<seealso/>
</element>
<element name="TDataSetLast.ExecuteTarget.Target">
<short>Target datasource examined in the method.</short>
</element>

<element name="TDataSetLast.UpdateTarget">
<short>
Enables or disables the action based on the state of the dataset in the 
target.
</short>
<descr>
<p>
<var>UpdateTarget</var> is an overridden method which enables or disables the 
database action based on the state of the dataset in the Target object.
</p>
<p>
<var>UpdateTarget</var> calls the <var>GetDataSet</var> method to retrieve 
the dataset in the Target datasource. The action is Enabled when the dataset 
is active and not already positioned at end-of-file (last record). This 
ensures that the action cannot be performed for a dataset that has not been 
opened, or does not require repositioning.
</p>
</descr>
<seealso/>
</element>
<element name="TDataSetLast.UpdateTarget.Target">
<short>Target datasource examined in the method.</short>
</element>

<element name="TDataSetLast.DataSource" link="#lcl.dbactns.TDataSetAction.DataSource"/>

<element name="TDataSetNext">
<short>
<var>TDataSetNext</var> moves to next record in the <var>DataSet</var>.
</short>
<descr>
<p>
<var>TDataSetNext</var> is a <var>TDataSetAction</var> descendant which moves 
to the next record in the dataset for a DataSource. TDataSetNext can be added 
to an action list and assigned to controls which perform the corresponding 
action.
</p>
<p>
<var>TDataSetNext</var> publishes the DataSource property which explicitly 
declares the target for the database action. The DataSource may be determined 
by examining a data-aware control which uses the database action, and passed 
an an argument to the UpdateTarget and HandlesTarget methods.
</p>
</descr>
<seealso>
<link id="TDataSetFirst"/>
<link id="TDataSetLast"/>
<link id="TDataSetPrior"/>
<link id="TDataSetRefresh"/>
<link id="TDataSetCancel"/>
<link id="TDataSetDelete"/>
<link id="TDataSetEdit"/>
<link id="TDataSetInsert"/>
<link id="TDataSetPost"/>
<link id="TDataSetAction"/>
</seealso>
</element>

<element name="TDataSetNext.ExecuteTarget">
<short>
Retrieves the dataset for the target datasource and calls its Next method.
</short>
<descr/>
<seealso/>
</element>
<element name="TDataSetNext.ExecuteTarget.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetNext.UpdateTarget">
<short>
Enables or disables the action based on the state of the dataset in the 
target.
</short>
<descr>
<p>
<var>UpdateTarget</var> is an overridden method which enables or disables the 
database action based on the state of the dataset in the Target object.
</p>
<p>
<var>UpdateTarget</var> calls the <var>GetDataSet</var> method to retrieve 
the dataset in the Target datasource. The action is Enabled when the dataset 
is active and not already positioned at end-of-file (or last record). This 
ensures that the action cannot be performed for a dataset that has not been 
opened, or does not require repositioning.
</p>
</descr>
<seealso/>
</element>
<element name="TDataSetNext.UpdateTarget.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetNext.DataSource" link="#lcl.dbactns.TDataSetAction.DataSource"/>

<element name="TDataSetPrior">
<short>
<var>TDataSetPrior</var> moves to previous record in the <var>DataSet</var>.
</short>
<descr>
<p>
<var>TDataSetPrior</var> is a <var>TDataSetAction</var> descendant which 
moves to the previous record in the dataset for a DataSource. TDataSetPrior 
can be added to an action list and assigned to controls which perform the 
corresponding action.
</p>
<p>
<var>TDataSetPrior</var> publishes the DataSource property which explicitly 
declares the target for the database action. The DataSource may be determined 
by examining a data-aware control which used the database action, and passed 
an an argument to the UpdateTarget and HandlesTarget methods.
</p>
</descr>
<seealso>
<link id="TDataSetFirst"/>
<link id="TDataSetLast"/>
<link id="TDataSetNext"/>
<link id="TDataSetRefresh"/>
<link id="TDataSetCancel"/>
<link id="TDataSetDelete"/>
<link id="TDataSetEdit"/>
<link id="TDataSetInsert"/>
<link id="TDataSetPost"/>
<link id="TDataSetAction"/>
</seealso>
</element>

<element name="TDataSetPrior.ExecuteTarget">
<short>
Retrieves the dataset for the target datasource and calls its Prior method.
</short>
<descr/>
<seealso/>
</element>
<element name="TDataSetPrior.ExecuteTarget.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetPrior.UpdateTarget">
<short>
Enables or disables the action based on the state of the dataset in the 
target.
</short>
<descr>
<p>
<var>UpdateTarget</var> is an overridden method which enables or disables the 
database action based on the state of the dataset in the Target object.
</p>
<p>
<var>UpdateTarget</var> calls the <var>GetDataSet</var> method to retrieve 
the dataset in the Target datasource. The action is Enabled when the dataset 
is active and not already positioned at its beginning (or first record). This 
ensures that the action cannot be performed for a dataset that has not been 
opened, or does not require repositioning.
</p>
</descr>
<seealso/>
</element>
<element name="TDataSetPrior.UpdateTarget.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetPrior.DataSource" link="#lcl.dbactns.TDataSetAction.DataSource"/>

<element name="TDataSetRefresh">
<short>
<var>TDataSetRefresh</var> refreshes the <var>DataSet</var>.
</short>
<descr>
<p>
<var>TDataSetRefresh</var> is a <var>TDataSetAction</var> descendant which 
refreshes the record content in the dataset for a DataSource. TDataSetRefresh 
can be added to an action list and assigned to controls which perform the 
corresponding action.
</p>
<p>
<var>TDataSetRefresh</var> publishes the DataSource property which explicitly 
declares the target for the database action. The DataSource may be determined 
by examining a data-aware control which used the database action, and passed 
an an argument to the UpdateTarget and HandlesTarget methods.
</p>
</descr>
<seealso>
<link id="TDataSetFirst"/>
<link id="TDataSetLast"/>
<link id="TDataSetNext"/>
<link id="TDataSetPrior"/>
<link id="TDataSetCancel"/>
<link id="TDataSetDelete"/>
<link id="TDataSetEdit"/>
<link id="TDataSetInsert"/>
<link id="TDataSetPost"/>
<link id="TDataSetAction"/>
</seealso>
</element>

<element name="TDataSetRefresh.ExecuteTarget">
<short>
Retrieves the dataset for the target datasource and calls its Refresh method.
</short>
<descr/>
<seealso/>
</element>
<element name="TDataSetRefresh.ExecuteTarget.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetRefresh.UpdateTarget">
<short>
Enables or disables the action based on the state of the dataset in the 
target.
</short>
<descr>
<p>
<var>UpdateTarget</var> is an overridden method which enables or disables the 
database action based on the state of the dataset in the <var>Target</var> 
object.
</p>
<p>
<var>UpdateTarget</var> calls the <var>GetDataSet</var> method to retrieve 
the dataset in the Target datasource. The action is Enabled when the dataset 
is active. This ensures that the action cannot be performed for a dataset 
that has not been opened.
</p>
</descr>
<seealso/>
</element>
<element name="TDataSetRefresh.UpdateTarget.Target">
<short>DataSource object examined in the method.</short>
</element>
<element name="TDataSetRefresh.DataSource" link="#lcl.dbactns.TDataSetAction.DataSource"/>

<element name="TDataSetCancel">
<short>
<var>TDataSetCancel</var> cancels the current edit mode for a 
<var>DataSet</var>.
</short>
<descr>
<p>
<var>TDataSetCancel</var> is a <var>TDataSetAction</var> descendant which 
cancels the current edit mode for a dataset record in its DataSource. This 
includes restoring the values in records to their pre-editing content, 
updating the record display, and removing any edit mode(s) assigned to the 
State property in the dataset. TDataSetCancel can be added to an action list 
and assigned to controls which perform the corresponding action.
</p>
<p>
<var>TDataSetCancel</var> publishes the DataSource property which explicitly 
declares the target for the database action. The DataSource may be determined 
by examining a data-aware control which used the database action, and passed 
an an argument to the UpdateTarget and HandlesTarget methods.
</p>
</descr>
<seealso>
<link id="TDataSetFirst"/>
<link id="TDataSetLast"/>
<link id="TDataSetNext"/>
<link id="TDataSetPrior"/>
<link id="TDataSetRefresh"/>
<link id="TDataSetDelete"/>
<link id="TDataSetEdit"/>
<link id="TDataSetInsert"/>
<link id="TDataSetPost"/>
<link id="TDataSetAction"/>
</seealso>
</element>

<element name="TDataSetCancel.ExecuteTarget">
<short>
Retrieves the dataset for the target datasource and calls its Cancel method.
</short>
<descr/>
<seealso/>
</element>
<element name="TDataSetCancel.ExecuteTarget.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetCancel.UpdateTarget">
<short>
Enables or disables the action based on the state of the dataset in the 
target.
</short>
<descr>
<p>
<var>UpdateTarget</var> is an overridden method which enables or disables the 
database action based on the state of the dataset in the <var>Target</var> 
object.
</p>
<p>
<var>UpdateTarget</var> calls the <var>GetDataSet</var> method to retrieve 
the dataset in the Target datasource. The action is <var>Enabled</var> when 
the dataset is active, and the value in its <var>State</var> property is in 
the <var>dsEditModes</var> set. This ensures that the action cannot be 
performed for a dataset that has not been opened, or has not been placed in 
edit mode.
</p>
</descr>
<seealso/>
</element>
<element name="TDataSetCancel.UpdateTarget.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetCancel.DataSource" link="#lcl.dbactns.TDataSetAction.DataSource"/>

<element name="TDataSetDelete">
<short>
<var>TDataSetDelete</var> deletes the current record in the 
<var>DataSet</var>.
</short>
<descr>
<p>
<var>TDataSetDelete</var> is a <var>TDataSetAction</var> descendant which 
deletes the current record in the dataset for the target DataSource.
</p>
<p>
Delete behavior is dependent on the underlying database engine. Datasets 
using the DBF engine simply mark a record for deletion; it is not physically 
removed until the database engine packs the storage structure. Other 
datasets, such SQL-based ones, may require that changes be committed before 
they are flushed to the database engine.
</p>
<p>
<var>TDataSetDelete</var> publishes the <var>DataSource</var> property which 
explicitly declares the target for the database action. The DataSource may be 
determined by examining a data-aware control which used the database action, 
and passed an an argument to the <var>UpdateTarget</var> and 
<var>HandlesTarget</var> methods.
</p>
</descr>
<seealso>
<link id="TDataSetFirst"/>
<link id="TDataSetLast"/>
<link id="TDataSetNext"/>
<link id="TDataSetPrior"/>
<link id="TDataSetRefresh"/>
<link id="TDataSetCancel"/>
<link id="TDataSetEdit"/>
<link id="TDataSetInsert"/>
<link id="TDataSetPost"/>
<link id="TDataSetAction"/>
</seealso>
</element>

<element name="TDataSetDelete.ExecuteTarget">
<short>
Retrieves the dataset for the target datasource and calls its Delete method.
</short>
<descr/>
<seealso/>
</element>
<element name="TDataSetDelete.ExecuteTarget.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetDelete.UpdateTarget">
<short>
Enables or disables the action based on the state of the dataset in the 
target.
</short>
<descr>
<p>
<var>UpdateTarget</var> is an overridden method which enables or disables the 
database action based on the state of the dataset in the Target object.
</p>
<p>
<var>UpdateTarget</var> calls the <var>GetDataSet</var> method to retrieve 
the dataset in the Target datasource. The action is Enabled when the dataset 
is active, is not positioned at the beginning- or end-of-file, and contains 
<b>True</b> in its <var>CanModify</var> property. This ensures that the 
action cannot be performed for a dataset that has not been opened, or when 
the current record cannot be modified.
</p>
</descr>
<seealso/>
</element>
<element name="TDataSetDelete.UpdateTarget.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetDelete.DataSource" link="#lcl.dbactns.TDataSetAction.DataSource"/>

<element name="TDataSetEdit">
<short>
<var>TDataSetEdit</var> edits the current record in the <var>DataSet</var>.
</short>
<descr>
<p>
<var>TDataSetEdit</var> is a <var>TDataSetAction</var> descendant which edits 
the current record in the dataset for the target DataSource. TDataSetEdit 
ensures that the dataset is placed in edit mode (when available) by calling 
the Edit method for the dataset. Edit behavior is dependent on the underlying 
database engine.
</p>
<p>
<var>TDataSetEdit</var> publishes the DataSource property which explicitly 
declares the target for the database action. The DataSource may be determined 
by examining a data-aware control which used the database action, and passed 
an an argument to the UpdateTarget and HandlesTarget methods.
</p>
</descr>
<seealso>
<link id="TDataSetFirst"/>
<link id="TDataSetLast"/>
<link id="TDataSetNext"/>
<link id="TDataSetPrior"/>
<link id="TDataSetRefresh"/>
<link id="TDataSetCancel"/>
<link id="TDataSetDelete"/>
<link id="TDataSetInsert"/>
<link id="TDataSetPost"/>
</seealso>
</element>

<element name="TDataSetEdit.ExecuteTarget">
<short>
Retrieves the dataset for the target datasource and calls its Edit method.
</short>
<descr/>
<seealso/>
</element>
<element name="TDataSetEdit.ExecuteTarget.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetEdit.UpdateTarget">
<short>
Enables or disables the action based on the state of the dataset in the 
target.
</short>
<descr>
<p>
<var>UpdateTarget</var> is an overridden method which enables or disables the 
database action based on the state of the dataset in the Target object.
</p>
<p>
<var>UpdateTarget</var> calls the <var>GetDataSet</var> method to retrieve 
the dataset in the Target datasource. The action is Enabled when the dataset 
is active, contains <b>True</b> in its <var>CanModify</var> property, and the 
value in its <var>State</var> property is in the <var>dsEditModes</var> set. 
This ensures that the action cannot be performed for a dataset that has not 
been opened, has not been placed in edit mode, or the current record cannot 
be modified.
</p>
</descr>
<seealso/>
</element>
<element name="TDataSetEdit.UpdateTarget.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetEdit.DataSource" link="#lcl.dbactns.TDataSetAction.DataSource"/>

<element name="TDataSetInsert">
<short>
<var>TDataSetInsert</var> inserts (appends) a new record into the 
<var>DataSet</var>.
</short>
<descr>
<p>
<var>TDataSetInsert</var> is a <var>TDataSetAction</var> descendant which 
inserts a new record into the dataset for the target DataSource. The new 
record has blank values in each of its fields, and allows editing of the 
field values.
</p>
<p>
Positioning of the inserted record is actually determined using the 
facilities for the underlying database engine. In most cases, the record is 
simply appended to its data store and ordered using the indexing facilities 
for the database engine. Some database engines require an additional step to 
make the record insertion and/or field editing permanent; i.e. SQL databases 
require use of a COMMIT statement to flush the changes to the database engine.
</p>
<p>
TDataSetInsert calls the <var>Insert</var> method for the target dataset to 
perform the database action.
</p>
</descr>
<seealso>
<link id="TDataSetFirst"/>
<link id="TDataSetLast"/>
<link id="TDataSetNext"/>
<link id="TDataSetPrior"/>
<link id="TDataSetRefresh"/>
<link id="TDataSetCancel"/>
<link id="TDataSetDelete"/>
<link id="TDataSetEdit"/>
<link id="TDataSetPost"/>
<link id="TDataSetAction"/>
</seealso>
</element>

<element name="TDataSetInsert.ExecuteTarget">
<short>
Retrieves the dataset for the target datasource and calls its Insert method.
</short>
<descr/>
<seealso/>
</element>
<element name="TDataSetInsert.ExecuteTarget.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetInsert.UpdateTarget">
<short>
Enables or disables the action based on the state of the dataset in the 
target.
</short>
<descr>
<p>
<var>UpdateTarget</var> is an overridden method which enables or disables the 
database action based on the state of the dataset in the Target object. 
<var>UpdateTarget</var> calls the <var>GetDataSet</var> method to retrieve 
the dataset in the Target datasource. The action is Enabled when the dataset 
is active. No other conditions are checked for the dataset. This ensures that 
the action cannot be performed for a dataset that has not been opened.
</p>
</descr>
<seealso/>
</element>
<element name="TDataSetInsert.UpdateTarget.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetInsert.DataSource" link="#lcl.dbactns.TDataSetAction.DataSource"/>

<element name="TDataSetPost">
<short>
<var>TDataSetPost</var> posts changes for the current record to the 
<var>DataSet</var>.
</short>
<descr>
<p>
<var>TDataSetPost</var> posts editing changes for the current record into the 
<var>DataSet</var>. Some datasets may require additional actions for editing 
changes to become permanent; i.e. SQL databases use transactions that require 
a <b>COMMIT</b> statement to be executed before changes are written to the 
database engine.
</p>
</descr>
<seealso>
<link id="TDataSetFirst"/>
<link id="TDataSetLast"/>
<link id="TDataSetNext"/>
<link id="TDataSetPrior"/>
<link id="TDataSetRefresh"/>
<link id="TDataSetCancel"/>
<link id="TDataSetDelete"/>
<link id="TDataSetEdit"/>
<link id="TDataSetInsert"/>
</seealso>
</element>

<element name="TDataSetPost.ExecuteTarget">
<short>
Retrieves the dataset for the target datasource and calls its Post method.
</short>
<descr/>
<seealso/>
</element>
<element name="TDataSetPost.ExecuteTarget.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetPost.UpdateTarget">
<short>
Enables or disables the action based on the state of the dataset in the 
target.
</short>
<descr>
<p>
<var>UpdateTarget</var> is an overridden method which enables or disables the 
database action based on the state of the dataset in the Target object.
</p>
<p>
<var>UpdateTarget</var> calls the <var>GetDataSet</var> method to retrieve 
the dataset in the Target datasource. The action is Enabled when the dataset 
is active, and its State contains a value in the dsEditModes set. This 
ensures that the action cannot be performed for a dataset that has not been 
opened, or has not been placed in edit mode.
</p>
<p>
Please note that UpdateTarget does not check the values for fields in the 
current record to determine if they have actually been altered.
</p>
</descr>
<seealso/>
</element>
<element name="TDataSetPost.UpdateTarget.Target">
<short>DataSource object examined in the method.</short>
</element>

<element name="TDataSetPost.DataSource" link="#lcl.dbactns.TDataSetAction.DataSource"/>

<element name="Register">
<short>
Registers components for use in the Lazarus IDE.
</short>
<descr>
<p>
The following components are registered but not displayed on the Lazarus IDE 
component palette:
</p>
<ul>
<li>TDataSetFirst</li>
<li>TDataSetLast</li>
<li>TDataSetNext</li>
<li>TDataSetPrior</li>
<li>TDataSetRefresh</li>
<li>TDataSetCancel</li>
<li>TDataSetDelete</li>
<li>TDataSetEdit</li>
<li>TDataSetInsert</li>
<li>TDataSetPost</li>
</ul>
</descr>
<seealso/>
</element>

</module>
<!-- DBActns -->
</package>
</fpdoc-descriptions>