SqlTransaction 类
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
表示将在 SQL Server 数据库中进行的 Transact-SQL 事务。 此类不能被继承。
public ref class SqlTransaction sealed : System::Data::Common::DbTransaction
public ref class SqlTransaction sealed : MarshalByRefObject, IDisposable, System::Data::IDbTransaction
public sealed class SqlTransaction : System.Data.Common.DbTransaction
public sealed class SqlTransaction : MarshalByRefObject, IDisposable, System.Data.IDbTransaction
type SqlTransaction = class
inherit DbTransaction
type SqlTransaction = class
inherit MarshalByRefObject
interface IDbTransaction
interface IDisposable
Public NotInheritable Class SqlTransaction
Inherits DbTransaction
Public NotInheritable Class SqlTransaction
Inherits MarshalByRefObject
Implements IDbTransaction, IDisposable
- 继承
- 继承
- 继承
- 实现
示例
以下示例创建 SqlConnection 和 SqlTransaction。 它还演示如何使用 BeginTransaction、 Commit和 Rollback 方法。 事务在发生任何错误时回滚,或者在未首先提交的情况下释放事务。
Try
/
Catch
错误处理用于在尝试提交或回滚事务时处理任何错误。
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
注解
应用程序通过对 对象调用 BeginTransactionSqlConnection 来创建 SqlTransaction 对象。 与事务 (关联的所有后续操作(例如,提交或中止事务) )都会在 对象上 SqlTransaction 执行。
注意
Try
/
Catch
提交或回滚 SqlTransaction时,应始终使用异常处理。 如果连接终止或事务已在服务器上回滚,则 和 Rollback 都会Commit生成 InvalidOperationException 。
有关SQL Server事务的详细信息,请参阅显式事务和高效事务编码。
属性
Connection |
获取与该事务关联的 SqlConnection 对象,或者如果该事务不再有效,则为 |
DbConnection |
在派生类中重写时,获取与事务关联的 DbConnection 对象。 (继承自 DbTransaction) |
IsolationLevel |
为该事务指定 IsolationLevel。 |
SupportsSavepoints |
获取一个值,该值指示此 DbTransaction 实例是否支持数据库保存点。
如果为 |
方法
显式接口实现
IDbTransaction.Connection |
获取与事务关联的 DbConnection 对象,或空引用(如果该事务不再有效)。 (继承自 DbTransaction) |