ITypeDescriptorContext.OnComponentChanging Method
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Raises the ComponentChanging event.
public:
bool OnComponentChanging();public bool OnComponentChanging();abstract member OnComponentChanging : unit -> boolPublic Function OnComponentChanging () As Booleantrue if this object can be changed; otherwise, false.
Use the OnComponentChanging method to send notification that an instance of an object is about to be changed. This method also returns a value indicating whether this object can be changed. When false is returned, do not change the object.
Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.
The OnComponentChanging method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
When overriding OnComponentChanging() in a derived class, be sure to call the base class' OnComponentChanging() method so that registered delegates receive the event.
| Product | Versions |
|---|---|
| .NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
.NET feedback
.NET is an open source project. Select a link to provide feedback: