Occurs when the server control binds to a data source.

Occurs when a server control is released from memory, which is the last stage of the server control lifecycle when an ASP.NET page is requested.

Fires after each file is uploaded and validated

Attach custom code to validate the uploading file

Occurs when the server control is initialized, which is the first step in its lifecycle.

Occurs when the server control is loaded into the Page object.

fired when an uploader be Init

Occurs after the Control object is loaded but prior to rendering.

Occurs when the server control is unloaded from memory.

Fires after all files have been uploaded and validated