'Declaration
 
Public Overloads Function BeginBackupQuery( _
   ByVal query As String, _
   ByVal writer As TextWriter, _
   ByVal callback As AsyncCallback, _
   ByVal stateObject As Object _
) As IAsyncResult

public IAsyncResult BeginBackupQuery( 
   string query,
   TextWriter writer,
   AsyncCallback callback,
   object stateObject
)

Parameters

query

The query, returning data for backup.

writer

The System.IO.TextWriter to write the script to.

callback

The delegate to call when the asynchronous invoke is complete. If callback is a null reference (Nothing in Visual Basic), the delegate is not called.

stateObject

State information that is passed on to the delegate.

Return Value

BeginBackupQuery(String,TextWriter,AsyncCallback,Object) method enables you to perform a query backup operation without having current thread blocked. In other words, your program can continue execution while the backup runs in background so you do not have to wait for it.

To start the query backup operation, you have to call BeginBackupQuery(String,TextWriter,AsyncCallback,Object) method, which in turn invokes appropriate actions in another thread. Return value of this method must be assigned to an System.IAsyncResult object. After executing this method, the program flow continues.

When you are ready to finish the query backup operation, call EndBackupQuery. If at the moment you call this function the query backup has not yet been finished, application stops and waits till the function returns.

Reference

DbDump Class
DbDump Members
Overload List