tdataset_beforecancel.htm
来自「Absolute Database 5.12 src. Absolute Da」· HTM 代码 · 共 52 行
HTM
52 行
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<span style="font-family:Helvetica,Arial; font-size:12pt; color:#000000"><b>TDataSet.BeforeCancel
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</b><span style="font-family:Helv; font-size:9pt; color:#000000"><span style="font-family:Helv; font-size:9pt; color:#7F0000"><a href=tdataset.htm>TDataSet</a></span></span><span style="font-family:Helvetica,Arial; font-size:12pt; color:#000000"><b>
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<span style="font-family:Helvetica,Arial; font-size:10pt; color:#000000">Occurs before an application executes a request to cancel changes to the active record.
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<b>property </b>BeforeCancel: <a href=tdatasetnotifyevent_type.htm>TDataSetNotifyEvent</a>;
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<b>Description</b>
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Write a BeforeCancel event to take specific action before an application carries out a request to cancel changes. BeforeCancel is called by the Cancel method before it cancels a dataset operation such as Edit, Insert, or Delete.
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An application might use the BeforeCancel event to record a user's changes in an undo buffer.
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