SqlConnection.BeginTransaction メソッド (IsolationLevel, String)
分離レベルとトランザクション名を指定して、データベース トランザクションを開始します。
Overloads Public Function BeginTransaction( _
ByVal iso As IsolationLevel, _ ByVal transactionName As String _) As SqlTransaction
[C#]
public SqlTransaction BeginTransaction(IsolationLeveliso,stringtransactionName);
[C++]
public: SqlTransaction* BeginTransaction(IsolationLeveliso,String* transactionName);
[JScript]
public function BeginTransaction(
iso : IsolationLevel,transactionName : String) : SqlTransaction;
パラメータ
- iso
トランザクションを実行する分離レベル。 - transactionName
トランザクションの名前。
戻り値
新しいトランザクションを表すオブジェクト。
例外
| 例外の種類 | 条件 |
|---|---|
| InvalidOperationException | 並列トランザクションはサポートされていません。 |
解説
このコマンドは、BEGIN TRANSACTION の SQL Server 実装に割り当てられます。
transactionName パラメータの値は、後の Rollback 呼び出し、および Save メソッドの savePoint パラメータで使用できます。
トランザクションは、 Commit メソッドまたは Rollback メソッドを使用して、明示的にコミットまたはロールバックする必要があります。.NET Framework Data Provider for SQL Server のトランザクションの管理モデルを正しく実行するために、SQL Server が提供するモデルなどの他のトランザクション管理モデルは使用しないでください。
使用例
[Visual Basic, C#, C++] SqlConnection および SqlTransaction を作成する例を次に示します。 BeginTransaction 、 Commit 、 Rollback の各メソッドの使い方も示します。
Public Sub RunSqlTransaction(myConnString As String)
Dim myConnection As New SqlConnection(myConnString)
myConnection.Open()
Dim myCommand As SqlCommand = myConnection.CreateCommand()
Dim myTrans As SqlTransaction
' Start a local transaction
myTrans = myConnection.BeginTransaction(IsolationLevel.ReadCommitted, "SampleTransaction")
' Must assign both transaction object and connection
' to Command object for a pending local transaction
myCommand.Connection = myConnection
myCommand.Transaction = myTrans
Try
myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')"
myCommand.ExecuteNonQuery()
myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')"
myCommand.ExecuteNonQuery()
myTrans.Commit()
Console.WriteLine("Both records are written to database.")
Catch e As Exception
Try
myTrans.Rollback("SampleTransaction")
Catch ex As SqlException
If Not myTrans.Connection Is Nothing Then
Console.WriteLine("An exception of type " & ex.GetType().ToString() & _
" was encountered while attempting to roll back the transaction.")
End If
End Try
Console.WriteLine("An exception of type " & e.GetType().ToString() & _
"was encountered while inserting the data.")
Console.WriteLine("Neither record was written to database.")
Finally
myConnection.Close()
End Try
End Sub 'RunSqlTransaction
[C#]
public void RunSqlTransaction(string myConnString)
{
SqlConnection myConnection = new SqlConnection(myConnString);
myConnection.Open();
SqlCommand myCommand = myConnection.CreateCommand();
SqlTransaction myTrans;
// Start a local transaction
myTrans = myConnection.BeginTransaction(IsolationLevel.ReadCommitted,"SampleTransaction");
// Must assign both transaction object and connection
// to Command object for a pending local transaction
myCommand.Connection = myConnection;
myCommand.Transaction = myTrans;
try
{
myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
myCommand.ExecuteNonQuery();
myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
myCommand.ExecuteNonQuery();
myTrans.Commit();
Console.WriteLine("Both records are written to database.");
}
catch(Exception e)
{
try
{
myTrans.Rollback("SampleTransaction");
}
catch (SqlException ex)
{
if (myTrans.Connection != null)
{
Console.WriteLine("An exception of type " + ex.GetType() +
" was encountered while attempting to roll back the transaction.");
}
}
Console.WriteLine("An exception of type " + e.GetType() +
" was encountered while inserting the data.");
Console.WriteLine("Neither record was written to database.");
}
finally
{
myConnection.Close();
}
}
[C++]
public:
void RunSqlTransaction(String* myConnString)
{
SqlConnection* myConnection = new SqlConnection(myConnString);
myConnection->Open();
SqlCommand* myCommand = myConnection->CreateCommand();
SqlTransaction* myTrans;
// Start a local transaction
myTrans = myConnection->BeginTransaction(IsolationLevel::ReadCommitted,S"SampleTransaction");
// Must assign both transaction object and connection
// to Command object for a pending local transaction
myCommand->Connection = myConnection;
myCommand->Transaction = myTrans;
try
{
myCommand->CommandText = S"Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
myCommand->ExecuteNonQuery();
myCommand->CommandText = S"Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
myCommand->ExecuteNonQuery();
myTrans->Commit();
Console::WriteLine(S"Both records are written to database.");
}
catch(Exception* e)
{
try
{
myTrans->Rollback(S"SampleTransaction");
}
catch (SqlException* ex)
{
if (myTrans->Connection != 0)
{
Console::WriteLine(S"An exception of type {0} was encountered while attempting to roll back the transaction.", ex->GetType());
}
}
Console::WriteLine(S"An exception of type {0} was encountered while inserting the data.", e->GetType());
Console::WriteLine(S"Neither record was written to database.");
}
__finally
{
myConnection->Close();
}
}
[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタ ボタン .gif)
をクリックします。
必要条件
プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ, .NET Compact Framework - Windows CE .NET
参照
SqlConnection クラス | SqlConnection メンバ | System.Data.SqlClient 名前空間 | SqlConnection.BeginTransaction オーバーロードの一覧