Question

ConflictResolver是：

csp.ConflictResolver.ClientUpdateServerUpdateAction = ResolveAction.ClientWins;
csp.ConflictResolver.ClientUpdateServerDeleteAction = ResolveAction.ClientWins;

如果客户端更新和服务器更新，或者如果客户端更新和服务器删除。每次按btnSyn按钮，服务器都会赢，但我希望客户赢。

请告诉我。

private void LoadData()
{
  //dataGridView1.DataSource = ctx.Employees;
  ctx.Refresh(System.Data.Objects.RefreshMode.ClientWins, ctx.Employees);
  dataGridView1.DataSource = null;
  dataGridView1.DataSource = ctx.Employees;
}
private void btnSave_Click(object sender, EventArgs e)
{
  ctx.SaveChanges();
}

private void btnRefresh_Click(object sender, EventArgs e)
{
  LoadData();
}

private void btnSync_Click(object sender, EventArgs e)
{
  TaskTrackerDataEntityCacheSyncAgent syncAgent = new TaskTrackerDataEntityCacheSyncAgent();
  syncAgent.Employees.SyncDirection = SyncDirection.Bidirectional;
  var syncStats = syncAgent.Synchronize();

  TaskTrackerDataEntityCacheClientSyncProvider csp = new TaskTrackerDataEntityCacheClientSyncProvider();
  csp.ConflictResolver.ClientDeleteServerUpdateAction = ResolveAction.ServerWins;
  csp.ConflictResolver.ClientUpdateServerUpdateAction = ResolveAction.ClientWins;
  csp.ConflictResolver.ClientUpdateServerDeleteAction = ResolveAction.ClientWins;



  MessageBox.Show(String.Format("Uploaded/Downloaded: {0}/{1}{4}Uploads/Downloads Failed: {2}/{3}{4}", syncStats.TotalChangesUploaded, syncStats.TotalChangesDownloaded, syncStats.UploadChangesFailed, syncStats.DownloadChangesFailed, Environment.NewLine));
  LoadData();
}

Answer 1

目前还不清楚你在问什么，这段代码应该做什么以及你试图解决这个问题，但是你似乎创建了一个SyncProvider并且不做任何事情。

当我从几个网络搜索点击中收集“SyncProvider apply ConflictResolver”时，您需要执行以下操作：

syncAgent.LocalProvider.ConflictResolver.ClientDeleteServerUpdateAction = ...

Answer 2

private void btnSync_Click(object sender, EventArgs e)
{
  //Create SyncAgent to have access to everything locally
  TaskTrackerDataEntityCacheSyncAgent syncAgent = new TaskTrackerDataEntityCacheSyncAgent();
  //=========================================================================================================
  //Determine the table and the direction for sync
  syncAgent.Employees.SyncDirection = SyncDirection.Bidirectional;
  //[Bidirectional( upload To the server first, then download from ther server )]
  //[DownloadOnly (Download from the server after full Sync )]
  //[Snapshot     ( Complete Refresh everything )]
  //[UploadOnly   ( upload to the server after full sync)]
  //=========================================================================================================
  //Create the ClientSyncProvider and ServerSyncProvider to use them in monitoring the failer in both sides
  TaskTrackerDataEntityCacheServerSyncProvider ssp = new TaskTrackerDataEntityCacheServerSyncProvider();
  TaskTrackerDataEntityCacheClientSyncProvider csp = new TaskTrackerDataEntityCacheClientSyncProvider();
  //=========================================================================================================
  //The SqlCeClientSyncProvider also includes a ConflictResolver property that you can use to resolve conflicts on the client. For each type of conflict, you can set a value from the ResolveAction enumeration:
  //ClientWins, ServerWins, FireEvent

  //There is no requirement to set the ConflictResolver for each type of conflict. 
  //You can resolve conflicts as you do on the server, by handling the ApplyChangeFailed event
  csp.ConflictResolver.ClientDeleteServerUpdateAction = ResolveAction.ClientWins;
  csp.ConflictResolver.ClientUpdateServerUpdateAction = ResolveAction.ClientWins;
  csp.ConflictResolver.ClientUpdateServerDeleteAction = ResolveAction.ClientWins;
  csp.ConflictResolver.ClientDeleteServerUpdateAction = ResolveAction.ClientWins;
  csp.ConflictResolver.ClientInsertServerInsertAction = ResolveAction.ClientWins;
  csp.ConflictResolver.StoreErrorAction = ResolveAction.ClientWins;
  csp.ApplyChangeFailed += SampleClientSyncProvider_ApplyChangeFailed;
  ssp.ApplyChangeFailed += SampleClientSyncProvider_ApplyChangeFailed;
  //=========================================================================================================
  //Add the  ClientSyncProvider and ServerSyncProvider to the syncAgnet
  syncAgent.LocalProvider = csp;
  syncAgent.RemoteProvider = ssp;   //it will help to generate exception when the client update refused 
  //=========================================================================================================
  //Call Sync method and recieve the a report about it
  SyncStatistics synStats = syncAgent.Synchronize();
  //=========================================================================================================
  //Display the sync stats
  MessageBox.Show(String.Format("Uploaded/Downloaded:{0}/{1}{4}", synStats.TotalChangesUploaded, synStats.TotalChangesDownloaded, synStats.UploadChangesFailed, synStats.DownloadChangesFailed, Environment.NewLine));
  //==============================================================
  //LoadData(); //It is function to reload the data 
}
//================================================================
//This function will run the client update over server update
private void SampleClientSyncProvider_ApplyChangeFailed(object sender, ApplyChangeFailedEventArgs e)
{

  //Log event data from the client side.
  //EventLogger.LogEvents(sender, e);


  if (e.Conflict.ConflictType == ConflictType.ClientInsertServerInsert)
  {
    //e.Action = ApplyAction.Continue;          // ignore the conflict and continue synchronization.
    //e.Action = ApplyAction.RetryApplyingRow;    //retry applying the row. The retry will fail, and the event will be raised again if you do not address the cause of the conflict by changing one or both of the conflicting rows.
    e.Action = ApplyAction.RetryWithForceWrite; //retry with logic to force applying the change.
  }
  if (e.Conflict.ConflictType == ConflictType.ClientDeleteServerUpdate)
  {
    //e.Action = ApplyAction.Continue;          // ignore the conflict and continue synchronization.
    //e.Action = ApplyAction.RetryApplyingRow;    //retry applying the row. The retry will fail, and the event will be raised again if you do not address the cause of the conflict by changing one or both of the conflicting rows.
    e.Action = ApplyAction.RetryWithForceWrite; //retry with logic to force applying the change.
  } if (e.Conflict.ConflictType == ConflictType.ClientUpdateServerDelete)
  {
    //e.Action = ApplyAction.Continue;          // ignore the conflict and continue synchronization.
    //e.Action = ApplyAction.RetryApplyingRow;    //retry applying the row. The retry will fail, and the event will be raised again if you do not address the cause of the conflict by changing one or both of the conflicting rows.
    e.Action = ApplyAction.RetryWithForceWrite;//retry with logic to force applying the change.
  }
  if (e.Conflict.ConflictType == ConflictType.ClientUpdateServerUpdate)
  {
    //e.Action = ApplyAction.Continue;          // ignore the conflict and continue synchronization.
    //e.Action = ApplyAction.RetryApplyingRow;    //retry applying the row. The retry will fail, and the event will be raised again if you do not address the cause of the conflict by changing one or both of the conflicting rows.
    e.Action = ApplyAction.RetryWithForceWrite; //retry with logic to force applying the change.
    //Logic goes here.
  }

  if (e.Conflict.ConflictType == ConflictType.ErrorsOccurred)
  {
    //Logic goes here.

  }
}

ConflictResolver无法正常工作

2 个答案: