SqlConnection.BeginTransaction メソッド
データベース トランザクションを開始します。
オーバーロードの一覧
データベース トランザクションを開始します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Function BeginTransaction() As SqlTransaction
[JScript] public function BeginTransaction() : SqlTransaction;
分離レベルを指定して、データベース トランザクションを開始します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Function BeginTransaction(IsolationLevel) As SqlTransaction
[C#] public SqlTransaction BeginTransaction(IsolationLevel);
[C++] public: SqlTransaction* BeginTransaction(IsolationLevel);
[JScript] public function BeginTransaction(IsolationLevel) : SqlTransaction;
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。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Function BeginTransaction(String) As SqlTransaction
[JScript] public function BeginTransaction(String) : SqlTransaction;
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。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Function BeginTransaction(IsolationLevel, String) As SqlTransaction
[C#] public SqlTransaction BeginTransaction(IsolationLevel, string);
[C++] public: SqlTransaction* BeginTransaction(IsolationLevel, String*);
[JScript] public function BeginTransaction(IsolationLevel, String) : SqlTransaction;
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。
[Visual Basic, C#, C++] メモ ここでは、BeginTransaction のオーバーロード形式のうちの 1 つだけについて、使用例を示します。その他の例については、各オーバーロード形式のトピックを参照してください。
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。
参照
SqlConnection クラス | SqlConnection メンバ | System.Data.SqlClient 名前空間