DMQueryTask.SuspendRequired 屬性
Gets or sets a Boolean value that indicates if tasks should suspend when they encounter a breakpoint. This value is set by the runtime engine for tasks and containers when a breakpoint is encountered.
命名空間： Microsoft.SqlServer.Dts.Tasks.DMQueryTask
組件： Microsoft.SqlServer.DMQueryTask (在 Microsoft.SqlServer.DMQueryTask.dll 中)
語法
'宣告
Public Property SuspendRequired As Boolean
Get
Set
'用途
Dim instance As DMQueryTask
Dim value As Boolean
value = instance.SuspendRequired
instance.SuspendRequired = value
public bool SuspendRequired { get; set; }
public:
virtual property bool SuspendRequired {
bool get () sealed;
void set (bool value) sealed;
}
abstract SuspendRequired : bool with get, set
override SuspendRequired : bool with get, set
final function get SuspendRequired () : boolean
final function set SuspendRequired (value : boolean)
屬性值
型別：System.Boolean
true if the task suspends when it encounters a breakpoint; otherwise, false.
實作
備註
The property is not set in code. It is set by the runtime for tasks and containers when a breakpoint is encountered.
However, you will need to provide code for this method, which is inherited from the IDTSSuspend class, if you write a multi-threaded custom task that exposes breakpoints. If your task is single threaded, which means that your implementation of Execute in your custom task does not start new threads, you do not need to implement this interface. For more information on writing custom tasks, see 開發自訂工作.
範例
The following code example is an example of an overridden SuspendRequired property for a custom task.
public bool SuspendRequired
{
get
{
// m_suspendRequired is an Private integer declared in the custom task.
return m_suspendRequired != 0;
}
set
{
// This lock is also taken by Suspend(). Since it is possible for the package to be
// suspended and resumed in quick succession, this property "put" might happen
// before the actual Suspend() call. Without the lock, the Suspend() might reset
// the canExecute event after we set it to abort the suspension.
lock (this)
{
Interlocked.Exchange(ref m_suspendRequired, value ? 1 : 0);
if (!value)
ResumeExecution();
}
}
Public ReadOnly Property SuspendRequired() As Boolean
Get
' m_suspendRequired is an Private integer declared in the custom task.
Return m_suspendRequired <> 0
End Get
Public WriteOnly Property SuspendRequired() As Boolean
Set (ByVal Value As Boolean)
' This lock is also taken by Suspend(). Since it is possible for the package to be
' suspended and resumed in quick succession, this property "put" might happen
' before the actual Suspend() call. Without the lock, the Suspend() might reset
' the canExecute event after it is set to abort the suspension.
lock (Me)
{
Interlocked.Exchange(m_suspendRequired, value ? 1 : 0)
If Not value Then
ResumeExecution()
End If
}
End Set
End Property