TransactionCompletedEventHandler 委托
定义
表示处理 TransactionCompleted 类的 Transaction 事件的方法。Represents the method that handles the TransactionCompleted event of a Transaction class.
public delegate void TransactionCompletedEventHandler(System::Object ^ sender, TransactionEventArgs ^ e);
public delegate void TransactionCompletedEventHandler(object sender, TransactionEventArgs e);
type TransactionCompletedEventHandler = delegate of obj * TransactionEventArgs -> unit
Public Delegate Sub TransactionCompletedEventHandler(sender As Object, e As TransactionEventArgs)
参数
- sender
- Object
事件源。The source of the event.
包含事件数据的 TransactionEventArgs。The TransactionEventArgs that contains the event data.
- 继承
示例
下面的示例演示应用程序如何通过订阅TransactionCompleted事件来获取事务的结果。The following example shows how an application can obtain the outcome of a transaction by subscribing to the TransactionCompleted event.
static void Main(string[] args)
{
try
{
//Create the transaction scope
using (TransactionScope scope = new TransactionScope())
{
//Register for the transaction completed event for the current transaction
Transaction.Current.TransactionCompleted += new TransactionCompletedEventHandler(Current_TransactionCompleted);
//Call complete on the TransactionScope based on console input
ConsoleKeyInfo c;
while (true)
{
Console.Write("Complete the transaction scope? [Y|N] ");
c = Console.ReadKey();
Console.WriteLine();
if ((c.KeyChar == 'Y') || (c.KeyChar == 'y'))
{
scope.Complete();
break;
}
else if ((c.KeyChar == 'N') || (c.KeyChar == 'n'))
{
break;
}
}
}
}
catch (System.Transactions.TransactionException ex)
{
Console.WriteLine(ex);
}
catch
{
Console.WriteLine("Cannot complete transaction");
throw;
}
}
//Transaction completed event handler
static void Current_TransactionCompleted(object sender, TransactionEventArgs e)
{
Console.WriteLine("A transaction has completed:");
Console.WriteLine("ID: {0}", e.Transaction.TransactionInformation.LocalIdentifier);
Console.WriteLine("Distributed ID: {0}", e.Transaction.TransactionInformation.DistributedIdentifier);
Console.WriteLine("Status: {0}", e.Transaction.TransactionInformation.Status);
Console.WriteLine("IsolationLevel: {0}", e.Transaction.IsolationLevel);
}
Public Shared Sub Main()
Try
Using scope As TransactionScope = New TransactionScope()
'Register for the transaction completed event for the current transaction
AddHandler Transaction.Current.TransactionCompleted, AddressOf Current_TransactionCompleted
'Perform transactional work here.
'Call complete on the TransactionScope based on console input
Dim c As ConsoleKeyInfo
While (True)
Console.Write("Complete the transaction scope? [Y|N] ")
c = Console.ReadKey()
Console.WriteLine()
If (c.KeyChar = "Y") Or (c.KeyChar = "y") Then
scope.Complete()
Exit While
ElseIf ((c.KeyChar = "N") Or (c.KeyChar = "n")) Then
Exit While
End If
End While
End Using
Catch ex As TransactionException
Console.WriteLine(ex)
Catch
Console.WriteLine("Cannot complete transaction")
Throw
End Try
End Sub
'Transaction completed event handler
Private Shared Sub Current_TransactionCompleted(ByVal sender As Object, ByVal e As TransactionEventArgs)
Console.WriteLine("A transaction has completed:")
Console.WriteLine("ID: {0}", e.Transaction.TransactionInformation.LocalIdentifier)
Console.WriteLine("Distributed ID: {0}", e.Transaction.TransactionInformation.DistributedIdentifier)
Console.WriteLine("Status: {0}", e.Transaction.TransactionInformation.Status)
Console.WriteLine("IsolationLevel: {0}", e.Transaction.IsolationLevel)
End Sub
扩展方法
GetMethodInfo(Delegate) |
获取指示指定委托表示的方法的对象。Gets an object that represents the method represented by the specified delegate. |