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SyncAdapter クラス

  • [アーティクル]

サーバー データベースでのスキーマ情報の取得および変更の取得と適用に使用される一連のデータ コマンドを表します。

名前空間:  Microsoft.Synchronization.Data.Server
アセンブリ:  Microsoft.Synchronization.Data.Server (Microsoft.Synchronization.Data.Server.dll 内)

構文

'宣言
Public Class SyncAdapter
'使用
Dim instance As SyncAdapter

public class SyncAdapter

public ref class SyncAdapter

type SyncAdapter =  class end

public class SyncAdapter

説明

SyncAdapter は DbServerSyncProvider とサーバー データベースの間のブリッジとして機能します。同期アダプターは、ADO.NET のデータ アダプターをモデルとしており、同期対象のテーブルごとに定義します。同期アダプターにより、クライアント データベースからサーバー データベースに挿入を適用する InsertCommand など、サーバー データベースの操作に必要な特定のコマンドがサーバー同期プロバイダーに指定されます。同期アダプターでは ADO.NETDbCommand オブジェクトが使用されるので、ADO.NET によってサポートされる任意のコマンド構造を使用できます。この構造には、インライン Transact-SQL、ストアド プロシージャ、ビュー、関数などが含まれます。コマンドが必要とするのは、転送および適用に使用する構造とデータを定義するための、単一の結果のみです。

例

次のコード例では、Customer テーブルの SyncAdapter オブジェクトを作成します。テーブルは、競合検出を伴う双方向同期用に構成されているため、使用可能なすべてのコマンドが指定されます。サーバーから変更を選択するコマンドは、インライン Transact-SQL です。 サーバーに変更を適用するコマンドは、データベース プロバイダーのセットアップ スクリプトに関するトピック に定義されているストアド プロシージャです。アダプター コマンドの詳細については、「スナップショット、ダウンロード、アップロード、および双方向の各同期を指定する方法」を参照してください。 完全なコンテキスト例でこのコードを表示するには、「データの競合とエラーを処理する方法」を参照してください。

SyncAdapter customerSyncAdapter = new SyncAdapter("Customer");

//This command is used if @sync_row_count returns
//0 when changes are applied to the server.
SqlCommand customerUpdateConflicts = new SqlCommand();
customerUpdateConflicts.CommandText =
    "SELECT CustomerId, CustomerName, SalesPerson, CustomerType " +
    "FROM Sales.Customer " +
    "WHERE CustomerId = @CustomerId";
customerUpdateConflicts.Parameters.Add("@CustomerId", SqlDbType.UniqueIdentifier);
customerUpdateConflicts.Connection = serverConn;
customerSyncAdapter.SelectConflictUpdatedRowsCommand = customerUpdateConflicts;

//This command is used if the server provider cannot find
//a row in the base table.
SqlCommand customerDeleteConflicts = new SqlCommand();
customerDeleteConflicts.CommandText =
    "SELECT CustomerId, CustomerName, SalesPerson, CustomerType " +
    "FROM Sales.Customer_Tombstone " +
    "WHERE CustomerId = @CustomerId";
customerDeleteConflicts.Parameters.Add("@CustomerId", SqlDbType.UniqueIdentifier);
customerDeleteConflicts.Connection = serverConn;
customerSyncAdapter.SelectConflictDeletedRowsCommand = customerDeleteConflicts;

//Select inserts from the server.
SqlCommand customerIncrInserts = new SqlCommand();
customerIncrInserts.CommandText =
    "SELECT CustomerId, CustomerName, SalesPerson, CustomerType " +
    "FROM Sales.Customer " +
    "WHERE (InsertTimestamp > @sync_last_received_anchor " +
    "AND InsertTimestamp <= @sync_new_received_anchor " +
    "AND InsertId <> @sync_client_id)";
customerIncrInserts.Parameters.Add("@" + SyncSession.SyncLastReceivedAnchor, SqlDbType.Timestamp);
customerIncrInserts.Parameters.Add("@" + SyncSession.SyncNewReceivedAnchor, SqlDbType.Timestamp);
customerIncrInserts.Parameters.Add("@" + SyncSession.SyncClientId, SqlDbType.UniqueIdentifier);
customerIncrInserts.Connection = serverConn;
customerSyncAdapter.SelectIncrementalInsertsCommand = customerIncrInserts;

//Apply inserts to the server.
SqlCommand customerInserts = new SqlCommand();
customerInserts.CommandType = CommandType.StoredProcedure;
customerInserts.CommandText = "usp_CustomerApplyInsert";
customerInserts.Parameters.Add("@" + SyncSession.SyncClientId, SqlDbType.UniqueIdentifier);
customerInserts.Parameters.Add("@" + SyncSession.SyncForceWrite, SqlDbType.Bit); 
customerInserts.Parameters.Add("@" + SyncSession.SyncRowCount, SqlDbType.Int).Direction = ParameterDirection.Output;
customerInserts.Parameters.Add("@CustomerId", SqlDbType.UniqueIdentifier);
customerInserts.Parameters.Add("@CustomerName", SqlDbType.NVarChar);
customerInserts.Parameters.Add("@SalesPerson", SqlDbType.NVarChar);
customerInserts.Parameters.Add("@CustomerType", SqlDbType.NVarChar);
customerInserts.Connection = serverConn;
customerSyncAdapter.InsertCommand = customerInserts;


//Select updates from the server.
SqlCommand customerIncrUpdates = new SqlCommand();
customerIncrUpdates.CommandText =
    "SELECT CustomerId, CustomerName, SalesPerson, CustomerType " +
    "FROM Sales.Customer " +
    "WHERE (UpdateTimestamp > @sync_last_received_anchor " +
    "AND UpdateTimestamp <= @sync_new_received_anchor " +
    "AND UpdateId <> @sync_client_id " +
    "AND NOT (InsertTimestamp > @sync_last_received_anchor " +
    "AND InsertId <> @sync_client_id))";
customerIncrUpdates.Parameters.Add("@" + SyncSession.SyncLastReceivedAnchor, SqlDbType.Timestamp);
customerIncrUpdates.Parameters.Add("@" + SyncSession.SyncNewReceivedAnchor, SqlDbType.Timestamp);
customerIncrUpdates.Parameters.Add("@" + SyncSession.SyncClientId, SqlDbType.UniqueIdentifier);
customerIncrUpdates.Connection = serverConn;
customerSyncAdapter.SelectIncrementalUpdatesCommand = customerIncrUpdates;

//Apply updates to the server.
SqlCommand customerUpdates = new SqlCommand();
customerUpdates.CommandType = CommandType.StoredProcedure;
customerUpdates.CommandText = "usp_CustomerApplyUpdate";
customerUpdates.Parameters.Add("@" + SyncSession.SyncLastReceivedAnchor, SqlDbType.Timestamp);
customerUpdates.Parameters.Add("@" + SyncSession.SyncClientId, SqlDbType.UniqueIdentifier);
customerUpdates.Parameters.Add("@" + SyncSession.SyncForceWrite, SqlDbType.Bit);            
customerUpdates.Parameters.Add("@" + SyncSession.SyncRowCount, SqlDbType.Int).Direction = ParameterDirection.Output;
customerUpdates.Parameters.Add("@CustomerId", SqlDbType.UniqueIdentifier);
customerUpdates.Parameters.Add("@CustomerName", SqlDbType.NVarChar);
customerUpdates.Parameters.Add("@SalesPerson", SqlDbType.NVarChar);
customerUpdates.Parameters.Add("@CustomerType", SqlDbType.NVarChar);
customerUpdates.Connection = serverConn;
customerSyncAdapter.UpdateCommand = customerUpdates;


//Select deletes from the server.
SqlCommand customerIncrDeletes = new SqlCommand();
customerIncrDeletes.CommandText =
    "SELECT CustomerId, CustomerName, SalesPerson, CustomerType " +
    "FROM Sales.Customer_Tombstone " +
    "WHERE (@sync_initialized = 1 " +
    "AND DeleteTimestamp > @sync_last_received_anchor " +
    "AND DeleteTimestamp <= @sync_new_received_anchor " +
    "AND DeleteId <> @sync_client_id)";
customerIncrDeletes.Parameters.Add("@" + SyncSession.SyncInitialized, SqlDbType.Bit);
customerIncrDeletes.Parameters.Add("@" + SyncSession.SyncLastReceivedAnchor, SqlDbType.Timestamp);
customerIncrDeletes.Parameters.Add("@" + SyncSession.SyncNewReceivedAnchor, SqlDbType.Timestamp);
customerIncrDeletes.Parameters.Add("@" + SyncSession.SyncClientId, SqlDbType.UniqueIdentifier);
customerIncrDeletes.Connection = serverConn;
customerSyncAdapter.SelectIncrementalDeletesCommand = customerIncrDeletes;

//Apply deletes to the server.
SqlCommand customerDeletes = new SqlCommand();
customerDeletes.CommandType = CommandType.StoredProcedure;
customerDeletes.CommandText = "usp_CustomerApplyDelete";
customerDeletes.Parameters.Add("@" + SyncSession.SyncLastReceivedAnchor, SqlDbType.Timestamp);
customerDeletes.Parameters.Add("@" + SyncSession.SyncClientId, SqlDbType.UniqueIdentifier);
customerDeletes.Parameters.Add("@" + SyncSession.SyncForceWrite, SqlDbType.Bit);           
customerDeletes.Parameters.Add("@" + SyncSession.SyncRowCount, SqlDbType.Int).Direction = ParameterDirection.Output;
customerDeletes.Parameters.Add("@CustomerId", SqlDbType.UniqueIdentifier);
customerDeletes.Connection = serverConn;
customerSyncAdapter.DeleteCommand = customerDeletes;


//Add the SyncAdapter to the server synchronization provider.
this.SyncAdapters.Add(customerSyncAdapter);

Dim customerSyncAdapter As New SyncAdapter("Customer")

'This command is used if @sync_row_count returns
'0 when changes are applied to the server.
Dim customerUpdateConflicts As New SqlCommand()
With customerUpdateConflicts
    .CommandText = _
        "SELECT CustomerId, CustomerName, SalesPerson, CustomerType " _
      & "FROM Sales.Customer " + "WHERE CustomerId = @CustomerId"
    .Parameters.Add("@CustomerId", SqlDbType.UniqueIdentifier)
    .Connection = serverConn
End With
customerSyncAdapter.SelectConflictUpdatedRowsCommand = customerUpdateConflicts

'This command is used if the server provider cannot find
'a row in the base table.
Dim customerDeleteConflicts As New SqlCommand()
With customerDeleteConflicts
    .CommandText = _
        "SELECT CustomerId, CustomerName, SalesPerson, CustomerType " _
      & "FROM Sales.Customer_Tombstone " + "WHERE CustomerId = @CustomerId"
    .Parameters.Add("@CustomerId", SqlDbType.UniqueIdentifier)
    .Connection = serverConn
End With
customerSyncAdapter.SelectConflictDeletedRowsCommand = customerDeleteConflicts

'Select inserts from the server.
Dim customerIncrInserts As New SqlCommand()
With customerIncrInserts
    .CommandText = _
        "SELECT CustomerId, CustomerName, SalesPerson, CustomerType " _
      & "FROM Sales.Customer " _
      & "WHERE (InsertTimestamp > @sync_last_received_anchor " _
      & "AND InsertTimestamp <= @sync_new_received_anchor " _
      & "AND InsertId <> @sync_client_id)"
    .Parameters.Add("@" + SyncSession.SyncLastReceivedAnchor, SqlDbType.Timestamp)
    .Parameters.Add("@" + SyncSession.SyncNewReceivedAnchor, SqlDbType.Timestamp)
    .Parameters.Add("@" + SyncSession.SyncClientId, SqlDbType.UniqueIdentifier)
    .Connection = serverConn
End With
customerSyncAdapter.SelectIncrementalInsertsCommand = customerIncrInserts

'Apply inserts to the server.
Dim customerInserts As New SqlCommand()
customerInserts.CommandType = CommandType.StoredProcedure
customerInserts.CommandText = "usp_CustomerApplyInsert"
customerInserts.Parameters.Add("@" + SyncSession.SyncClientId, SqlDbType.UniqueIdentifier)
customerInserts.Parameters.Add("@" + SyncSession.SyncForceWrite, SqlDbType.Bit)
customerInserts.Parameters.Add("@" + SyncSession.SyncRowCount, SqlDbType.Int).Direction = ParameterDirection.Output
customerInserts.Parameters.Add("@CustomerId", SqlDbType.UniqueIdentifier)
customerInserts.Parameters.Add("@CustomerName", SqlDbType.NVarChar)
customerInserts.Parameters.Add("@SalesPerson", SqlDbType.NVarChar)
customerInserts.Parameters.Add("@CustomerType", SqlDbType.NVarChar)
customerInserts.Connection = serverConn
customerSyncAdapter.InsertCommand = customerInserts


'Select updates from the server.
Dim customerIncrUpdates As New SqlCommand()
With customerIncrUpdates
    .CommandText = _
        "SELECT CustomerId, CustomerName, SalesPerson, CustomerType " _
      & "FROM Sales.Customer " _
      & "WHERE (UpdateTimestamp > @sync_last_received_anchor " _
      & "AND UpdateTimestamp <= @sync_new_received_anchor " _
      & "AND UpdateId <> @sync_client_id " _
      & "AND NOT (InsertTimestamp > @sync_last_received_anchor " _
      & "AND InsertId <> @sync_client_id))"
    .Parameters.Add("@" + SyncSession.SyncLastReceivedAnchor, SqlDbType.Timestamp)
    .Parameters.Add("@" + SyncSession.SyncNewReceivedAnchor, SqlDbType.Timestamp)
    .Parameters.Add("@" + SyncSession.SyncClientId, SqlDbType.UniqueIdentifier)
    .Connection = serverConn
End With
customerSyncAdapter.SelectIncrementalUpdatesCommand = customerIncrUpdates

'Apply updates to the server.
Dim customerUpdates As New SqlCommand()
customerUpdates.CommandType = CommandType.StoredProcedure
customerUpdates.CommandText = "usp_CustomerApplyUpdate"
customerUpdates.Parameters.Add("@" + SyncSession.SyncLastReceivedAnchor, SqlDbType.Timestamp)
customerUpdates.Parameters.Add("@" + SyncSession.SyncClientId, SqlDbType.UniqueIdentifier)
customerUpdates.Parameters.Add("@" + SyncSession.SyncForceWrite, SqlDbType.Bit)
customerUpdates.Parameters.Add("@" + SyncSession.SyncRowCount, SqlDbType.Int).Direction = ParameterDirection.Output
customerUpdates.Parameters.Add("@CustomerId", SqlDbType.UniqueIdentifier)
customerUpdates.Parameters.Add("@CustomerName", SqlDbType.NVarChar)
customerUpdates.Parameters.Add("@SalesPerson", SqlDbType.NVarChar)
customerUpdates.Parameters.Add("@CustomerType", SqlDbType.NVarChar)
customerUpdates.Connection = serverConn
customerSyncAdapter.UpdateCommand = customerUpdates


'Select deletes from the server.
Dim customerIncrDeletes As New SqlCommand()
With customerIncrDeletes
    .CommandText = _
        "SELECT CustomerId, CustomerName, SalesPerson, CustomerType " _
      & "FROM Sales.Customer_Tombstone " _
      & "WHERE (@sync_initialized = 1 " _
      & "AND DeleteTimestamp > @sync_last_received_anchor " _
      & "AND DeleteTimestamp <= @sync_new_received_anchor " _
      & "AND DeleteId <> @sync_client_id)"
    .Parameters.Add("@" + SyncSession.SyncInitialized, SqlDbType.Bit)
    .Parameters.Add("@" + SyncSession.SyncLastReceivedAnchor, SqlDbType.Timestamp)
    .Parameters.Add("@" + SyncSession.SyncNewReceivedAnchor, SqlDbType.Timestamp)
    .Parameters.Add("@" + SyncSession.SyncClientId, SqlDbType.UniqueIdentifier)
    .Connection = serverConn
End With
customerSyncAdapter.SelectIncrementalDeletesCommand = customerIncrDeletes

'Apply deletes to the server.
Dim customerDeletes As New SqlCommand()
customerDeletes.CommandType = CommandType.StoredProcedure
customerDeletes.CommandText = "usp_CustomerApplyDelete"
customerDeletes.Parameters.Add("@" + SyncSession.SyncLastReceivedAnchor, SqlDbType.Timestamp)
customerDeletes.Parameters.Add("@" + SyncSession.SyncClientId, SqlDbType.UniqueIdentifier)
customerDeletes.Parameters.Add("@" + SyncSession.SyncForceWrite, SqlDbType.Bit)
customerDeletes.Parameters.Add("@" + SyncSession.SyncRowCount, SqlDbType.Int).Direction = ParameterDirection.Output
customerDeletes.Parameters.Add("@CustomerId", SqlDbType.UniqueIdentifier)
customerDeletes.Connection = serverConn
customerSyncAdapter.DeleteCommand = customerDeletes


'Add the SyncAdapter to the server synchronization provider.
Me.SyncAdapters.Add(customerSyncAdapter)

継承階層

System. . :: . .Object
  Microsoft.Synchronization.Data.Server..::..SyncAdapter

スレッド セーフ

この型の public static (Visual Basic では Shared) のメンバーはスレッド セーフです。インスタンス メンバーの場合は、スレッド セーフであるとは限りません。

参照

参照

SyncAdapter メンバー

Microsoft.Synchronization.Data.Server 名前空間