SqlTransaction 类

定义

命名空间:

System.Data.SqlClient

程序集:

System.Data.dll

表示SQL Server数据库中要进行的Transact-SQL事务。 此类不能被继承。

public ref class SqlTransaction sealed : System::Data::Common::DbTransaction

public sealed class SqlTransaction : System.Data.Common.DbTransaction

type SqlTransaction = class
    inherit DbTransaction

Public NotInheritable Class SqlTransaction
Inherits DbTransaction

继承

Object

MarshalByRefObject

DbTransaction

SqlTransaction

示例

以下示例创建一个 SqlConnection 和一个 SqlTransaction。 它还演示了如何使用BeginTransaction和CommitRollback方法。 事务在发生任何错误时回滚，或者在未首次提交的情况下释放该事务。 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

应用程序通过调用BeginTransactionSqlConnection对象来创建SqlTransaction对象。 与事务关联的所有后续操作（例如提交或中止事务）对对象执行 SqlTransaction 。

Note

Try / Catch 提交或回滚异常 SqlTransaction处理时应始终使用异常处理。 如果 Commit 连接已终止，或者事务已在服务器上回滚，则同时 Rollback 生成一个 InvalidOperationException 连接。

有关SQL Server事务的详细信息，请参阅 Explicit Transactions 和 Coding Efficient Transactions。

属性

名称	说明
Connection	SqlConnection获取与事务关联的对象，或者null如果事务不再有效。
DbConnection	在派生类中重写时，获取 DbConnection 与事务关联的对象。 (继承自 DbTransaction)
IsolationLevel	指定 IsolationLevel 此事务。

方法

名称	说明
Commit()	提交数据库事务。
CreateObjRef(Type)	创建一个对象，其中包含生成用于与远程对象通信的代理所需的所有相关信息。 (继承自 MarshalByRefObject)
Dispose()	释放由 <a0/a0> 使用的非托管资源。 (继承自 DbTransaction)
Dispose(Boolean)	释放由托管资源使用 DbTransaction 的非托管资源，并选择性地释放托管资源。 (继承自 DbTransaction)
Equals(Object)	确定指定的对象是否等于当前对象。 (继承自 Object)
GetHashCode()	用作默认哈希函数。 (继承自 Object)
GetLifetimeService()	检索控制此实例的生存期策略的当前生存期服务对象。 (继承自 MarshalByRefObject)
GetType()	获取当前实例的 Type。 (继承自 Object)
InitializeLifetimeService()	获取生存期服务对象来控制此实例的生存期策略。 (继承自 MarshalByRefObject)
MemberwiseClone()	创建当前 Object的浅表副本。 (继承自 Object)
MemberwiseClone(Boolean)	创建当前 MarshalByRefObject 对象的浅表副本。 (继承自 MarshalByRefObject)
Rollback()	从挂起状态回滚事务。
Rollback(String)	从挂起状态回滚事务，并指定事务或保存点名称。
Save(String)	在事务中创建一个保存点，该保存点可用于回滚事务的一部分，并指定保存点名称。
ToString()	返回一个表示当前对象的字符串。 (继承自 Object)

显式接口实现

名称	说明
IDbTransaction.Connection	获取与 DbConnection 事务关联的对象;如果事务不再有效，则获取 null 引用。 (继承自 DbTransaction)

另请参阅

• 本地事务
• ADO.NET 概述