DB2 V10.1 for Linux, UNIX, and Windows

DB2Connection.BeginTransaction 方法

在数据库中启动事务。

重载列表

名称	描述
BeginTransaction()	在数据库中启动事务。
BeginTransaction(IsolationLevel)	使用指定的 IsolationLevel 值在数据库中开始事务。

示例

[Visual Basic, C#] 以下示例将创建 DB2®Connection 和 DB2Transaction。它还演示如何使用 BeginTransaction、DB2Transaction.Commit 和 DB2Transaction.Rollback 方法。

注： [Visual Basic, C#] 此示例演示如何使用 BeginTransaction 的某个重载版本。有关其他可用的示例，请参阅各个重载主题。

[Visual Basic]
Public Sub RunDB2Transaction(myConnString As String)
    Dim myConnection As New DB2Connection(myConnString)
    myConnection.Open()

    Dim myCommand As New DB2Command()
    Dim myTrans As DB2Transaction

    ' Start a local transaction
    myTrans = myConnection.BeginTransaction(IsolationLevel.ReadCommitted)
    ' Assign transaction object for a pending local transaction
    myCommand.Transaction = myTrans

    
    Try
        myCommand.CommandText = "Insert into STAFF (ID, NAME) VALUES (...)"
        myCommand.ExecuteNonQuery()
        myCommand.CommandText = "Insert into STAFF (ID, NAME) VALUES (...)"
        myCommand.ExecuteNonQuery()
        myTrans.Commit()
        Console.WriteLine("Both records are written to database.")
    Catch e As Exception
        myTrans.Rollback()
        Console.WriteLine(e.ToString())
        Console.WriteLine("Neither record was written to database.")    Finally
        myConnection.Close()
    End Try
End Sub

[C#]
public void RunDB2Transaction(string myConnString)
{
   DB2Connection myConnection = new DB2Connection(myConnString);
   myConnection.Open();

   DB2Command myCommand = new DB2Command();
   DB2Transaction myTrans;

   // Start a local transaction
   myTrans = myConnection.BeginTransaction(IsolationLevel.ReadCommitted);
   // Assign transaction object for a pending local transaction
   myCommand.Transaction = myTrans;

   
   try
   {
     myCommand.CommandText = "Insert into STAFF (ID, NAME) VALUES (...)";
     myCommand.ExecuteNonQuery();
     myCommand.CommandText = "Insert into STAFF (ID, NAME) VALUES (...)";
     myCommand.ExecuteNonQuery();
     myTrans.Commit();
     Console.WriteLine("Both records are written to database.");
   }
   catch(Exception e)
   {
     myTrans.Rollback();
     Console.WriteLine(e.ToString());
     Console.WriteLine("Neither record was written to database.");
   }
   finally
   {
     myConnection.Close();
   }
}