如何在vb.net中使用Transact-SQL 事务，sqltransaction类的使用

要求

表示要在 SQL Server 数据库中处理的 Transact-SQL 事务。不能继承此类。

有关此类型所有成员的列表，请参阅 SqlTransaction 成员。

System.Object
   System.MarshalByRefObject
      System.Data.SqlClient.SqlTransaction

[Visual Basic]
NotInheritable Public Class SqlTransaction
   Inherits MarshalByRefObject
   Implements IDbTransaction, IDisposable

[C#]
public sealed class SqlTransaction : MarshalByRefObject,
   IDbTransaction, IDisposable

[C++]
public __gc __sealed class SqlTransaction : public
   MarshalByRefObject, IDbTransaction, IDisposable

[JScript]
public class SqlTransaction extends MarshalByRefObject implements
   IDbTransaction, IDisposable

线程安全

此类型的所有公共静态（Visual Basic 中为 Shared）成员对多线程操作而言都是安全的。但不保证任何实例成员是线程安全的。

备注

应用程序通过在 SqlConnection 对象上调用 BeginTransaction 来创建 SqlTransaction 对象。对 SqlTransaction 对象执行与该事务关联的所有后面的操作（例如提交或中止该事务）。

示例

[Visual Basic, C#] 下面的示例创建一个 SqlConnection 和一个 SqlTransaction。它还演示如何使用 BeginTransaction、Commit 和 Rollback 方法。

[Visual Basic] 
Public Sub RunSqlTransaction(myConnString As String)
    Dim myConnection As New SqlConnection(myConnString)
    myConnection.Open()
    
    Dim myCommand As SqlCommand = myConnection.CreateCommand()
    Dim myTrans As SqlTransaction
    
    ' Start a local transaction
    myTrans = myConnection.BeginTransaction()
    ' Must assign both transaction object and connection
    ' to Command object for a pending local transaction
    myCommand.Connection = myConnection
    myCommand.Transaction = myTrans
    
    Try
      myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')"
      myCommand.ExecuteNonQuery()
      myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')"
      myCommand.ExecuteNonQuery()
      myTrans.Commit()
      Console.WriteLine("Both records are written to database.")
    Catch e As Exception
      Try
        myTrans.Rollback()
      Catch ex As SqlException
        If Not myTrans.Connection Is Nothing Then
          Console.WriteLine("An exception of type " & ex.GetType().ToString() & _
                            " was encountered while attempting to roll back the transaction.")
        End If
      End Try
    
      Console.WriteLine("An exception of type " & e.GetType().ToString() & _
                      "was encountered while inserting the data.")
      Console.WriteLine("Neither record was written to database.")
    Finally
      myConnection.Close()
    End Try
End Sub 'RunSqlTransaction

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

    SqlCommand myCommand = myConnection.CreateCommand();
    SqlTransaction myTrans;

    // Start a local transaction
    myTrans = myConnection.BeginTransaction();
    // Must assign both transaction object and connection
    // to Command object for a pending local transaction
    myCommand.Connection = myConnection;
    myCommand.Transaction = myTrans;

    try
    {
      myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (100, 'Description')";
      myCommand.ExecuteNonQuery();
      myCommand.CommandText = "Insert into Region (RegionID, RegionDescription) VALUES (101, 'Description')";
      myCommand.ExecuteNonQuery();
      myTrans.Commit();
      Console.WriteLine("Both records are written to database.");
    }
    catch(Exception e)
    {
      try
      {
        myTrans.Rollback();
      }
      catch (SqlException ex)
      {
        if (myTrans.Connection != null)
        {
          Console.WriteLine("An exception of type " + ex.GetType() +
                            " was encountered while attempting to roll back the transaction.");
        }
      }
    
      Console.WriteLine("An exception of type " + e.GetType() +
                        " was encountered while inserting the data.");
      Console.WriteLine("Neither record was written to database.");
    }
    finally 
    {
      myConnection.Close();
    }
}

[C++, JScript] 没有可用于 C++ 或 JScript 的示例。若要查看 Visual Basic 或 C# 示例，请单击页左上角的“语言筛选器”按钮 。

要求

命名空间: System.Data.SqlClient

平台: Windows 98, Windows NT 4.0, Windows ME, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 系列, .NET Framework 精简版 - Windows CE .NET

程序集: System.Data (在 System.Data.dll 中)