RaiseChanging Method

In This Topic

Call this method to invoke the OnChanged method before any change occurs.

Syntax

public virtual void RaiseChanging( 
   int hint,
   int subhint,
   object obj
)

Parameters

hint
subhint
obj

Remarks

You should call this method before making any changes for which the call to RaiseChanged does not have the complete previous (old) state. You should also implement CopyOldValueForUndo and CopyNewValueForRedo to record the state information for the particular hint passed to this method. When the call to RaiseChanged has the complete before-and-after state as arguments, calling this method is not necessary. You will typically call RaiseChanging followed by a call to RaiseChanged when making a bunch of changes while SuspendsUpdates is true, if you still want to maintain the ability to undo and redo all of those changes.

Reference

GoDocument Class
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