TCnFileSystemWatcher Class
Listens to the file system change notifications and raises events when a directory, or file in a directory, changes.
CNClrLib.Control.Base.TClrBaseComponent
CNClrLib.Component.FileSystemWatcher.TCnFileSystemWatcher
type TCnFileSystemWatcher = class(TClrBaseComponent) end;
The TCnFileSystemWatcher type exposes the following members.
| Name | Description | |
|---|---|---|
 | Create(TComponent) | Creates and initializes a TCnFileSystemWatcher instance. (Overrides TClrBaseComponent.Create(TComponent).) |
| Destroy | Frees the resources allocated with a TCnFileSystemWatcher instance. (Overrides TClrBaseComponent.Destroy.) |
| Name | Description | |
|---|---|---|
 | DefaultClrObject | Get the common language runtime object interface for this component. (Inherited from TClrBaseComponent.) |
 | EnableRaisingEvents | Gets or sets a value indicating whether the component is enabled. |
| Filter | Gets or sets the filter string used to determine what files are monitored in a directory. |
| IncludeSubdirectories | Gets or sets a value indicating whether subdirectories within the specified path should be monitored. |
| InternalBufferSize | Gets or sets the size (in bytes) of the internal buffer. |
| NotifyFilter | Gets or sets the type of changes to watch for. |
| Path | Gets or sets the path of the directory to watch. |
| SynchronizingObject | Gets or sets the object used to marshal the event handler calls issued as a result of a directory change. |
| Name | Description | |
|---|---|---|
| BeginInit | Begins the initialization of a FileSystemWatcher used on a form or used by another component. The initialization occurs at run time. |
| Dispose | Releases the resources used by the Component. (Inherited from TClrBaseComponent.) |
 | DoGetDefaultClrObject | Represents method |
| DoGetDotNetBaseComponent | Represents method |
| EndInit | Ends the initialization of a FileSystemWatcher used on a form or used by another component. The initialization occurs at run time. |
| GetClrObject | Represents method |
| RegisterEventCallBack(ClrWString,Pointer) | Add an event to the instance using the specified event name and function pointer which is the event handler. The RegisterEventCallBack method does not directly add the event handler to the event. A hooking mechanism is used such that if the event is fired, the hook event is also fired which in turn calls the function pointer. (Inherited from TClrBaseComponent.) |
| RegisterEventSource | Register the Delphi object which will raise the .Net event handler. (Inherited from TClrBaseComponent.) |
| UnRegisterEventCallBack(ClrWString,Pointer) | Remove an event from the instance using the specified event name and function pointer which is the event handler. (Inherited from TClrBaseComponent.) |
| UnRegisterEventSource | Unregister the Delphi object which raised the .Net event handler. (Inherited from TClrBaseComponent.) |
| WaitForChanged(TWatcherChangeTypes_Set) | Overloaded. A synchronous method that returns a structure that contains specific information on the change that occurred, given the type of change you want to monitor. |
| WaitForChanged(TWatcherChangeTypes_Set,Integer) | Overloaded. A synchronous method that returns a structure that contains specific information on the change that occurred, given the type of change you want to monitor and the time (in milliseconds) to wait before timing out. |
| Name | Description | |
|---|---|---|
 | OnChanged | Occurs when a file or directory in the specified Path is changed. |
| OnCreated | Occurs when a file or directory in the specified Path is created. |
| OnDeleted | Occurs when a file or directory in the specified Path is deleted. |
| OnError | Occurs when the instance of CnFileSystemWatcher is unable to continue monitoring changes or when the internal buffer overflows. |
| OnRenamed | Occurs when a file or directory in the specified Path is renamed. |
See C:\Users\Public\Documents\CrystalNet Technologies\.Net VCL for Delphi Demo Folder after installation for examples of how to use this component.