SqlTransaction.Rollback 方法

定義

命名空間:: System.Data.SqlClient

組件:: System.Data.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

會將交易從待處理狀態回滾。

多載

名稱	Description
Rollback()	會將交易從待處理狀態回滾。
Rollback(String)	從待處理狀態回滾交易，並指定交易名稱或儲存點名稱。

Rollback()

會將交易從待處理狀態回滾。

public:
 virtual void Rollback();

public:
 override void Rollback();

public void Rollback();

public override void Rollback();

abstract member Rollback : unit -> unit
override this.Rollback : unit -> unit

override this.Rollback : unit -> unit

Public Sub Rollback ()

Public Overrides Sub Rollback ()

實作

Rollback()

例外狀況

Exception

嘗試提交交易時發生錯誤。

InvalidOperationException

交易已經被提交或回滾。

-或-

連線斷了。

範例

以下範例會產生 a SqlConnection 和 SqlTransaction。同時示範如何使用 BeginTransaction、 Commit及 Rollback 方法。一旦出錯，交易就會被回滾。 Try / Catch 錯誤處理用於在嘗試提交或回滾交易時處理錯誤。

private static void ExecuteSqlTransaction(string connectionString)
{
    using (SqlConnection connection = new SqlConnection(connectionString))
    {
        connection.Open();

        SqlCommand command = connection.CreateCommand();
        SqlTransaction transaction;

        // Start a local transaction.
        transaction = connection.BeginTransaction();

        // Must assign both transaction object and connection
        // to Command object for a pending local transaction
        command.Connection = connection;
        command.Transaction = transaction;

        try
        {
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
            command.ExecuteNonQuery();
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
            command.ExecuteNonQuery();

            // Attempt to commit the transaction.
            transaction.Commit();
            Console.WriteLine("Both records are written to database.");
        }
        catch (Exception ex)
        {
            Console.WriteLine("Commit Exception Type: {0}", ex.GetType());
            Console.WriteLine("  Message: {0}", ex.Message);

            // Attempt to roll back the transaction.
            try
            {
                transaction.Rollback();
            }
            catch (Exception ex2)
            {
                // This catch block will handle any errors that may have occurred
                // on the server that would cause the rollback to fail, such as
                // a closed connection.
                Console.WriteLine("Rollback Exception Type: {0}", ex2.GetType());
                Console.WriteLine("  Message: {0}", ex2.Message);
            }
        }
    }
}

Private Sub ExecuteSqlTransaction(ByVal connectionString As String)
    Using connection As New SqlConnection(connectionString)
        connection.Open()

        Dim command As SqlCommand = connection.CreateCommand()
        Dim transaction As SqlTransaction

        ' Start a local transaction
        transaction = connection.BeginTransaction()

        ' Must assign both transaction object and connection
        ' to Command object for a pending local transaction.
        command.Connection = connection
        command.Transaction = transaction

        Try
            command.CommandText = _
              "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')"
            command.ExecuteNonQuery()
            command.CommandText = _
              "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')"

            command.ExecuteNonQuery()

            ' Attempt to commit the transaction.
            transaction.Commit()
            Console.WriteLine("Both records are written to database.")

        Catch ex As Exception
            Console.WriteLine("Commit Exception Type: {0}", ex.GetType())
            Console.WriteLine("  Message: {0}", ex.Message)

            ' Attempt to roll back the transaction.
            Try
                transaction.Rollback()

            Catch ex2 As Exception
                ' This catch block will handle any errors that may have occurred
                ' on the server that would cause the rollback to fail, such as
                ' a closed connection.
                Console.WriteLine("Rollback Exception Type: {0}", ex2.GetType())
                Console.WriteLine("  Message: {0}", ex2.Message)
            End Try
        End Try
    End Using
End Sub

備註

Rollback 方法等同於 Transact-SQL 回滾交易陳述式。更多資訊請參閱回滾交易（Transact-SQL）。

交易只能從待處理狀態回滾（after BeginTransaction 已被呼叫，但 before Commit 被呼叫）。如果交易在被處置或被呼叫前CommitRollback會被回滾。

Note

Try / Catch 回滾交易時應始終使用例外處理。 Rollback A 會產生，InvalidOperationException若連線已終止或交易已被伺服器回滾。

欲了解更多SQL Server交易資訊，請參見交易（Transact-SQL）。

另請參閱

適用於

Rollback(String)

從待處理狀態回滾交易，並指定交易名稱或儲存點名稱。

public:
 void Rollback(System::String ^ transactionName);

public void Rollback(string transactionName);

member this.Rollback : string -> unit

override this.Rollback : string -> unit

Public Sub Rollback (transactionName As String)

參數

transactionName: String

要回滾的交易名稱，或是要回滾到的儲存點。

例外狀況

ArgumentException

未指定交易名稱。

InvalidOperationException

交易已經被提交或回滾。

-或-

連線斷了。

範例

private static void ExecuteSqlTransaction(string connectionString)
{
    using (SqlConnection connection = new SqlConnection(connectionString))
    {
        connection.Open();

        SqlCommand command = connection.CreateCommand();
        SqlTransaction transaction;

        // Start a local transaction.
        transaction = connection.BeginTransaction("SampleTransaction");

        // Must assign both transaction object and connection
        // to Command object for a pending local transaction
        command.Connection = connection;
        command.Transaction = transaction;

        try
        {
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
            command.ExecuteNonQuery();
            command.CommandText =
                "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
            command.ExecuteNonQuery();

            // Attempt to commit the transaction.
            transaction.Commit();
            Console.WriteLine("Both records are written to database.");
        }
        catch (Exception ex)
        {
            Console.WriteLine("Commit Exception Type: {0}", ex.GetType());
            Console.WriteLine("  Message: {0}", ex.Message);

            // Attempt to roll back the transaction.
            try
            {
                transaction.Rollback("SampleTransaction");
            }
            catch (Exception ex2)
            {
                // This catch block will handle any errors that may have occurred
                // on the server that would cause the rollback to fail, such as
                // a closed connection.
                Console.WriteLine("Rollback Exception Type: {0}", ex2.GetType());
                Console.WriteLine("  Message: {0}", ex2.Message);
            }
        }
    }
}

Private Sub ExecuteSqlTransaction(ByVal connectionString As String)
    Using connection As New SqlConnection(connectionString)
        connection.Open()

        Dim command As SqlCommand = connection.CreateCommand()
        Dim transaction As SqlTransaction

        ' Start a local transaction
        transaction = connection.BeginTransaction("SampleTransaction")

        ' Must assign both transaction object and connection
        ' to Command object for a pending local transaction.
        command.Connection = connection
        command.Transaction = transaction

        Try
            command.CommandText = _
              "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')"
            command.ExecuteNonQuery()
            command.CommandText = _
              "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')"

            command.ExecuteNonQuery()

            ' Attempt to commit the transaction.
            transaction.Commit()
            Console.WriteLine("Both records are written to database.")

        Catch ex As Exception
            Console.WriteLine("Exception Type: {0}", ex.GetType())
            Console.WriteLine("  Message: {0}", ex.Message)

            ' Attempt to roll back the transaction.
            Try
                transaction.Rollback("SampleTransaction")

            Catch ex2 As Exception
                ' This catch block will handle any errors that may have occurred
                ' on the server that would cause the rollback to fail, such as
                ' a closed connection.
                Console.WriteLine("Rollback Exception Type: {0}", ex2.GetType())
                Console.WriteLine("  Message: {0}", ex2.Message)
            End Try
        End Try
    End Using
End Sub

備註

Rollback 方法等同於 Transact-SQL 回滾交易陳述式。欲了解更多資訊，請參閱 Transactions （Transact-SQL）。

交易只能從待處理狀態回滾（after BeginTransaction 已被呼叫，但 before Commit 被呼叫）。如果交易在被處置或被呼叫前CommitRollback被回滾。

Note

Try / Catch 回滾交易時應始終使用例外處理。 Rollback A 會產生，InvalidOperationException若連線已終止或交易已被伺服器回滾。

欲了解更多SQL Server交易資訊，請參見交易（Transact-SQL）。

另請參閱

適用於

意見反應

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