DbConnectionFailure 事件
在应用变更期间数据库连接失败时就会出现该事件。
命名空间： Microsoft.Synchronization.Data
程序集： Microsoft.Synchronization.Data（在 Microsoft.Synchronization.Data.dll 中）
语法
声明
Public Event DbConnectionFailure As EventHandler(Of DbConnectionFailureEventArgs)
用法
Dim instance As RelationalSyncProvider
Dim handler As EventHandler(Of DbConnectionFailureEventArgs)
AddHandler instance.DbConnectionFailure, handler
public event EventHandler<DbConnectionFailureEventArgs> DbConnectionFailure
public:
event EventHandler<DbConnectionFailureEventArgs^>^ DbConnectionFailure {
void add (EventHandler<DbConnectionFailureEventArgs^>^ value);
void remove (EventHandler<DbConnectionFailureEventArgs^>^ value);
}
member DbConnectionFailure : IEvent<EventHandler<DbConnectionFailureEventArgs>,
DbConnectionFailureEventArgs>
注释
可以使用此事件来覆盖在共享系统（如 SQL Azure）上阻止数据库连接时所采取的默认操作。同步应用程序可注册处理此事件，并且可以决定是重试该事务还是取消同步。
示例
以下示例说明 DbConnectionFailure 事件处理程序。此事件处理程序检查重试次数并覆盖默认值，以便在重试应用变更十次后再停止同步。
static void HandleDbConnectionFailure(object sender, DbConnectionFailureEventArgs e)
{
// Override the default to retry 10 times before fail.
if (e.ApplyTransactionRetry < 10)
{
e.Action = DbConnectionFailureAction.Retry;
}
else
{
e.Action = DbConnectionFailureAction.AbortSync;
}
}
Private Shared Sub HandleDbConnectionFailure(ByVal sender As Object, ByVal e As DbConnectionFailureEventArgs)
' Override the default to retry 10 times before fail.
If e.ApplyTransactionRetry < 10 Then
e.Action = DbConnectionFailureAction.Retry
Else
e.Action = DbConnectionFailureAction.AbortSync
End If
End Sub
请参阅
参考
Microsoft.Synchronization.Data 命名空间