SqlCeReplication.BeginSynchronize 方法 (AsyncCallback, Object)

启动异步数据同步操作。同步结束时，将调用 AsyncCallback 委托。同步期间不报告状态。

命名空间: System.Data.SqlServerCe
程序集: System.Data.SqlServerCe（在 system.data.sqlserverce.dll 中）

语法

声明
Public Function BeginSynchronize ( _
    onSyncCompletion As AsyncCallback, _
    state As Object _
) As IAsyncResult
用法
Dim instance As SqlCeReplication
Dim onSyncCompletion As AsyncCallback
Dim state As Object
Dim returnValue As IAsyncResult

returnValue = instance.BeginSynchronize(onSyncCompletion, state)

public IAsyncResult BeginSynchronize (
    AsyncCallback onSyncCompletion,
    Object state
)

public:
IAsyncResult^ BeginSynchronize (
    AsyncCallback^ onSyncCompletion, 
    Object^ state
)

public IAsyncResult BeginSynchronize (
    AsyncCallback onSyncCompletion, 
    Object state
)

public function BeginSynchronize (
    onSyncCompletion : AsyncCallback, 
    state : Object
) : IAsyncResult

不适用。

参数

• onSyncCompletion
  由调用方实现的、在同步结束时调用的 IAsyncResult 委托。

• state
  AsyncState 属性返回的用户定义的对象。

返回值

已通过调用此函数启动的异步操作使用的 IAsyncResult 接口。您可以使用此接口测试同步是否已完成，也可以一直等到同步结束。

备注

有关在 SQL Server Compact Edition 中实现异步数据同步的信息，请参见 SQL Server Compact Edition Books Online（《SQL Server Compact Edition 联机丛书》）中的“Asynchronous Data Synchronization”（异步数据的同步）。

示例

下面的示例演示如何设置 SQL Server Compact Edition 复制以执行异步数据同步。

Public Sub SyncCompletedCallback(ByVal ar As IAsyncResult)
    Try
        Dim repl As SqlCeReplication = CType(ar.AsyncState, SqlCeReplication)

        ' Complete the asynchronous sync and test for errors
        '
        repl.EndSynchronize(ar)
    Catch
        ' Handle errors here
        '
    End Try

End Sub 'SyncCompletedCallback

Public Sub Test()
    Dim repl As SqlCeReplication = Nothing

    Try
        ' Set the Replication object
        '
        repl = New SqlCeReplication( _
            "https://www.adventure-works.com/sqlmobile/sqlcesa30.dll", _
            "MyInternetLogin", _
            "<password>", _
            "MyPublisher", _
            "MyPublisherDatabase", _
            "MyPublisherLogin", _
            "<password>", _
            "MyPublication", _
            "MySubscriber", _
            "Data Source=MyDatabase.sdf")

        ' Begin asynchronous sync; This call returns immediately 
        '
        Dim ar As IAsyncResult = repl.BeginSynchronize( _
            New AsyncCallback(AddressOf SyncCompletedCallback), _
            repl)

        Thread.Sleep(3000)

        ' Cancel the sync if it didn't complete in 3 seconds; normally,
        ' this is hooked up to a button's Click event
        '
        repl.CancelSynchronize()
    Catch
        ' Handle errors here
    Finally
        ' Dispose the repl object
        '
        repl.Dispose()
    End Try

End Sub 'Test

public void SyncCompletedCallback(IAsyncResult ar)
{
    try
    {
        SqlCeReplication repl = (SqlCeReplication)ar.AsyncState;

        // Complete the asynchronous sync and test for errors
        //
        repl.EndSynchronize(ar);
    }
    catch (SqlCeException)
    {
        // Handle errors here
        //
    }
}

public void Test()
{
    SqlCeReplication repl = null;

    try
    {
        // Set the Replication object
        //
        repl = new SqlCeReplication(
            "https://www.adventure-works.com/sqlmobile/sqlcesa30.dll",
            "MyInternetLogin",
            "<password>",
            "MyPublisher",
            "MyPublisherDatabase",
            "MyPublisherLogin",
            "<password>",
            "MyPublication",
            "MySubscriber",
            "Data Source=MyDatabase.sdf");

        // Begin asynchronous sync; This call returns immediately 
        //
        IAsyncResult ar = repl.BeginSynchronize(
            new AsyncCallback(SyncCompletedCallback),
            repl);

        Thread.Sleep(3000);

        // Cancel the sync if it didn't complete in 3 seconds; normally,
        // this is hooked up to a button's Click event
        //
        repl.CancelSynchronize();
    }
    catch (SqlCeException)
    {
        // Handle errors here
    }
    finally
    {
        // Dispose the repl object
        //
        repl.Dispose();
    }
}

平台

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

Windows Vista、Microsoft Windows XP SP2 和 Windows Server 2003 SP1 支持 Microsoft .NET Framework 3.0。

版本信息

.NET Framework

受以下版本支持：3.0

.NET Compact Framework

受以下版本支持：2.0

请参见

参考

SqlCeReplication 类
SqlCeReplication 成员
System.Data.SqlServerCe 命名空间