BeginRestore(String) Method

In This Topic

Starts an asynchronous invocation of a Restore(String) method.

Syntax

Visual Basic
C#

'Declaration
 
Public Overloads Function BeginRestore( _
   ByVal fileName As String _
) As IAsyncResult

public IAsyncResult BeginRestore( 
   string fileName
)

Parameters

fileName: The name of the file to load the script from.

Return Value

An System.IAsyncResult interface that represents the asynchronous operation started by calling this method.

Remarks

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

To start the restore operation, you have to call BeginRestore(String) 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 backup operation, call EndRestore. If at the moment you call this function the restore operation has not yet been finished, application stops and waits till the function returns.

Example

This sample demonstrates performing async backup and restore operations.

csharp

public void DumpIt(SQLiteConnection conn)
{
        conn.Open();
        SQLiteDump sqSqlDump = new SQLiteDump();
        sqSqlDump.Connection = conn;
        sqSqlDump.IncludeDrop = true;
        IAsyncResult Result = sqSqlDump.BeginBackup("d:\\dump.dmp");
        while (!Result.IsCompleted)
        {
                Console.Write(".");
                //Perform here any operation you need
        }
        sqSqlDump.EndBackup(Result);
        Console.WriteLine("Dumped.");
        conn.Close();
}

public void UnDumpIt(SQLiteConnection conn)
{
        conn.Open();
        SQLiteDump sqSqlDump = new SQLiteDump();
        sqSqlDump.Connection = conn;
        IAsyncResult Result = sqSqlDump.BeginRestore("d:\\dump.dmp");
        while (!Result.IsCompleted)
        {
                Console.Write(".");
                //Perform here any operation you need
        }
        sqSqlDump.EndRestore(Result);
        Console.WriteLine("Restored.");
        conn.Close();
}

Visual Basic

Public Sub DumpIt(conn As SQLiteConnection)
        conn.Open()
        Dim sqSqlDump As New SQLiteDump()
        sqSqlDump.Connection = conn
        sqSqlDump.IncludeDrop = True
        Dim Result As IAsyncResult = sqSqlDump.BeginBackup("d:\dump.dmp")
        While Not Result.IsCompleted
                'Perform here any operation you need
                Console.Write(".")
        End While
        sqSqlDump.EndBackup(Result)
        Console.WriteLine("Dumped.")
        conn.Close()
End Sub

Public Sub UnDumpIt(conn As SQLiteConnection)
        conn.Open()
        Dim sqSqlDump As New SQLiteDump()
        sqSqlDump.Connection = conn
        Dim Result As IAsyncResult = sqSqlDump.BeginRestore("d:\dump.dmp")
        While Not Result.IsCompleted
                'Perform here any operation you need
                Console.Write(".")
        End While
        sqSqlDump.EndRestore(Result)
        Console.WriteLine("Restored.")
        conn.Close()
End Sub

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

DbDump Class
DbDump Members
Overload List

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