SqlTransaction.Rollback 方法
定義
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。
多載
Rollback() |
從暫止狀態復原交易。 |
Rollback(String) |
從暫止狀態中復原交易,並指定交易和儲存點名稱。 |
Rollback()
從暫止狀態復原交易。
public:
override void Rollback();
public override void Rollback ();
override this.Rollback : unit -> unit
Public Overrides Sub Rollback ()
例外狀況
嘗試認可交易時發生錯誤。
範例
下列範例會 SqlConnection 建立 和 SqlTransaction 。 它也示範如何使用 BeginTransaction 、 Commit 和 Rollback 方法。 交易會在任何錯誤時回復。 Try
/Catch
錯誤處理可用來處理嘗試認可或回復交易時的任何錯誤。
using Microsoft.Data.SqlClient;
namespace Transaction1CS
{
class Program
{
static void Main()
{
string connectionString =
"Persist Security Info=False;Integrated Security=SSPI;database=Northwind;server=(local)";
ExecuteSqlTransaction(connectionString);
Console.ReadLine();
}
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);
}
}
}
}
}
}
備註
方法 Rollback 相當於 Transact-SQL ROLLBACK TRANSACTION 語句。 如需詳細資訊,請參閱 ROLLBACK TRANSACTION (Transact-SQL) 。
只有在呼叫 之後 BeginTransaction ,交易才能從擱置狀態復原 (,但在呼叫之前 Commit) 。 交易會在呼叫 之前或 Rollback
呼叫之前 Commit
處置交易時回復。
注意
Try
/Catch
復原交易時,應該一律使用例外狀況處理。 Rollback
如果連接已終止,或交易已在伺服器上復原,則會產生 InvalidOperationException 。
如需SQL Server交易的詳細資訊,請參閱Transact-SQL (交易) 。
適用於
Rollback(String)
從暫止狀態中復原交易,並指定交易和儲存點名稱。
public:
void Rollback(System::String ^ transactionName);
public:
override void Rollback(System::String ^ transactionName);
public void Rollback (string transactionName);
public override void Rollback (string transactionName);
override this.Rollback : string -> unit
Public Sub Rollback (transactionName As String)
Public Overrides Sub Rollback (transactionName As String)
參數
- transactionName
- String
要復原的交易名稱,或要復原的儲存點。
例外狀況
沒有指定任何交易名稱。
範例
下列範例會 SqlConnection 建立 和 SqlTransaction 。 它也示範如何使用 BeginTransaction 、 Commit 和 Rollback 方法。 交易會在任何錯誤時回復。 Try
/Catch
錯誤處理可用來處理嘗試認可或回復交易時的任何錯誤。
using Microsoft.Data.SqlClient;
namespace Transaction1CS
{
class Program
{
static void Main()
{
string connectionString =
"Persist Security Info=False;Integrated Security=SSPI;database=Northwind;server=(local)";
ExecuteSqlTransaction(connectionString);
Console.ReadLine();
}
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);
}
}
}
}
}
}
備註
方法 Rollback 相當於 Transact-SQL ROLLBACK TRANSACTION 語句。 如需詳細資訊,請參閱 交易 (Transact-SQL) 。
只有在呼叫 之後 BeginTransaction ,交易才能從擱置狀態復原 (,但在呼叫之前 Commit) 。 如果在或 Rollback
呼叫之前 Commit
處置交易,則會回復交易。
注意
Try
/Catch
復原交易時,應該一律使用例外狀況處理。 Rollback
如果連接已終止,或交易已在伺服器上復原,則會產生 InvalidOperationException 。
如需SQL Server交易的詳細資訊,請參閱Transact-SQL (交易) 。