OracleConnection.BeginTransaction 方法

定义

命名空间:

System.Data.OracleClient

程序集:

System.Data.OracleClient.dll

在数据库中开始一个事务。

重载

BeginTransaction()	在数据库中开始一个事务。
BeginTransaction(IsolationLevel)	使用指定的 IsolationLevel 值在数据库中开始一个事务。

BeginTransaction()

在数据库中开始一个事务。

public:
 System::Data::OracleClient::OracleTransaction ^ BeginTransaction();

public System.Data.OracleClient.OracleTransaction BeginTransaction ();

override this.BeginTransaction : unit -> System.Data.OracleClient.OracleTransaction

Public Function BeginTransaction () As OracleTransaction

返回

OracleTransaction

表示新事务的对象。

例外

InvalidOperationException

不支持并行事务。

示例

以下示例创建 OracleConnection 和 OracleTransaction。 它还演示如何使用 BeginTransaction、 Commit和 Rollback 方法。

public void RunOracleTransaction(string connectionString)
{
    using (OracleConnection connection = new OracleConnection(connectionString))
    {
        connection.Open();

        OracleCommand command = connection.CreateCommand();
        OracleTransaction transaction;

        // Start a local transaction
        transaction = connection.BeginTransaction(IsolationLevel.ReadCommitted);
        // Assign transaction object for a pending local transaction
        command.Transaction = transaction;

        try
        {
            command.CommandText =
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (50, 'TECHNOLOGY', 'DENVER')";
            command.ExecuteNonQuery();
            command.CommandText =
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (60, 'ENGINEERING', 'KANSAS CITY')";
            command.ExecuteNonQuery();
            transaction.Commit();
            Console.WriteLine("Both records are written to database.");
        }
        catch (Exception e)
        {
            transaction.Rollback();
            Console.WriteLine(e.ToString());
            Console.WriteLine("Neither record was written to database.");
        }
    }
}

Public Sub RunOracleTransaction(ByVal connectionString As String)
    Using connection As New OracleConnection(connectionString)
        connection.Open()

        Dim command As OracleCommand = connection.CreateCommand()
        Dim transaction As OracleTransaction

        ' Start a local transaction
        transaction = connection.BeginTransaction(IsolationLevel.ReadCommitted)
        ' Assign transaction object for a pending local transaction
        command.Transaction = transaction

        Try
            command.CommandText = _
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (50, 'TECHNOLOGY', 'DENVER')"
            command.ExecuteNonQuery()
            command.CommandText = _
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (60, 'ENGINEERING', 'KANSAS CITY')"
            command.ExecuteNonQuery()
            transaction.Commit()
            Console.WriteLine("Both records are written to database.")
        Catch e As Exception
            transaction.Rollback()
            Console.WriteLine(e.ToString())
            Console.WriteLine("Neither record was written to database.")
        End Try
    End Using
End Sub

注解

若要提交或回滚事务，必须显式使用 Commit 或 Rollback 方法。

若要确保 .NET Framework Oracle 数据提供程序事务管理模型正确执行，请避免使用其他事务管理模型，例如数据库提供的事务管理模型。

注意

如果未指定隔离级别，则使用默认隔离级别。 若要使用 BeginTransaction 方法指定隔离级别，请使用 BeginTransaction 重载。

另请参阅

• Commit()
• Rollback()

BeginTransaction(IsolationLevel)

使用指定的 IsolationLevel 值在数据库中开始一个事务。

public:
 System::Data::OracleClient::OracleTransaction ^ BeginTransaction(System::Data::IsolationLevel il);

public System.Data.OracleClient.OracleTransaction BeginTransaction (System.Data.IsolationLevel il);

override this.BeginTransaction : System.Data.IsolationLevel -> System.Data.OracleClient.OracleTransaction

Public Function BeginTransaction (il As IsolationLevel) As OracleTransaction

参数

il

IsolationLevel

该连接的事务隔离级别。

返回

OracleTransaction

表示新事务的对象。

例外

InvalidOperationException

不支持并行事务。

示例

以下示例创建 OracleConnection 和 OracleTransaction。 它还演示如何使用 BeginTransaction、 Commit和 Rollback 方法。

public void RunOracleTransaction(string connectionString)
{
    using (OracleConnection connection = new OracleConnection(connectionString))
    {
        connection.Open();

        OracleCommand command = connection.CreateCommand();
        OracleTransaction transaction;

        // Start a local transaction
        transaction = connection.BeginTransaction(IsolationLevel.ReadCommitted);
        // Assign transaction object for a pending local transaction
        command.Transaction = transaction;

        try
        {
            command.CommandText =
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (50, 'TECHNOLOGY', 'DENVER')";
            command.ExecuteNonQuery();
            command.CommandText =
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (60, 'ENGINEERING', 'KANSAS CITY')";
            command.ExecuteNonQuery();
            transaction.Commit();
            Console.WriteLine("Both records are written to database.");
        }
        catch (Exception e)
        {
            transaction.Rollback();
            Console.WriteLine(e.ToString());
            Console.WriteLine("Neither record was written to database.");
        }
    }
}

Public Sub RunOracleTransaction(ByVal connectionString As String)
    Using connection As New OracleConnection(connectionString)
        connection.Open()

        Dim command As OracleCommand = connection.CreateCommand()
        Dim transaction As OracleTransaction

        ' Start a local transaction
        transaction = connection.BeginTransaction(IsolationLevel.ReadCommitted)
        ' Assign transaction object for a pending local transaction
        command.Transaction = transaction

        Try
            command.CommandText = _
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (50, 'TECHNOLOGY', 'DENVER')"
            command.ExecuteNonQuery()
            command.CommandText = _
                "INSERT INTO Dept (DeptNo, Dname, Loc) values (60, 'ENGINEERING', 'KANSAS CITY')"
            command.ExecuteNonQuery()
            transaction.Commit()
            Console.WriteLine("Both records are written to database.")
        Catch e As Exception
            transaction.Rollback()
            Console.WriteLine(e.ToString())
            Console.WriteLine("Neither record was written to database.")
        End Try
    End Using
End Sub

注解

若要提交或回滚事务，必须显式使用 Commit 或 Rollback 方法。

若要确保 .NET Framework Oracle 数据提供程序事务管理模型正确执行，请避免使用其他事务管理模型，例如数据库提供的事务管理模型。

另请参阅

• Commit()
• Rollback()