Public Sub ServerSyncInvoked(ByVal messageName As String)

public void ServerSyncInvoked(string messageName)

此方法由单独的线程调用。为避免多线程问题，它应向 UI 发布一个事件。如果您正在使用多线程，建议您使用一个单独的连接，并使用 lock 关键字来访问与应用程序的其余部分共享的所有对象。

导入 iAnywhere.Data.UltraLite

Public Class MainWindow Inherits System.Windows.Forms.Form Implements ULServerSyncListener

Private conn As ULConnection

Public Sub New(ByVal args() As String) MyBase.New()

' [Windows 窗体设计器] 需要此调用。InitializeComponent()

'Add any initialization after the InitializeComponent() call ULConnection.DatabaseManager.SetServerSyncListener( _ "myCompany.mymsg", "myCompany.myapp", Me _ ) 'Create Connection ...End Sub

Protected Overrides Sub OnClosing( _ ByVal e As System.ComponentModel.CancelEventArgs _ ) ULConnection.DatabaseManager.SetServerSyncListener( _ Nothing, Nothing, Nothing _ ) MyBase.OnClosing(e) End Sub

Public Sub ServerSyncInvoked(ByVal messageName As String) _ Implements ULServerSyncListener.ServerSyncInvoked

Me.Invoke(New EventHandler(AddressOf Me.ServerSyncAction)) End Sub

Public Sub ServerSyncAction( _ ByVal sender As Object, ByVal e As EventArgs _ ) ' Do Server sync conn.Synchronize() End Sub End Class

以下 C# 码段介绍如何接收服务器同步请求并在 UI 线程中执行同步。

using iAnywhere.Data.UltraLite;
public class Form1 : System.Windows.Forms.Form, ULServerSyncListener
{
    private System.Windows.Forms.MainMenu mainMenu1;
    private ULConnection conn;

    public Form1()
    {
        //
        // Required for Windows Form Designer support
        //
        InitializeComponent();

        //
        // TODO: Add any constructor code after
        // InitializeComponent call
        //
        ULConnection.DatabaseManager.SetServerSyncListener(
            "myCompany.mymsg", "myCompany.myapp", this
        );

	    // Create connection
        ...
    }

    protected override void Dispose( bool disposing )
    {
        base.Dispose( disposing );
    }

    protected override void OnClosing(
        System.ComponentModel.CancelEventArgs e)
    {
        ULConnection.DatabaseManager.SetServerSyncListener(
            null, null, null
        );
        base.OnClosing(e);
    }

    public void ServerSyncInvoked( string messageName )
    {
        this.Invoke( new EventHandler( ServerSyncHandler ) );
    }

    internal void ServerSyncHandler(object sender, EventArgs e)
    {
        conn.Synchronize();
    }
}