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