DMQueryTask.SuspendRequired Property

Reference

Definition

Namespace:: Microsoft.SqlServer.Dts.Tasks.DMQueryTask

Assembly:: Microsoft.SqlServer.DMQueryTask.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

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.

public:
 property bool SuspendRequired { bool get(); void set(bool value); };

public bool SuspendRequired { get; set; }

member this.SuspendRequired : bool with get, set

Public Property SuspendRequired As Boolean

Property Value

Boolean

true if the task suspends when it encounters a breakpoint; otherwise, false.

Implements

SuspendRequired

Examples

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

Remarks

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 Developing a Custom Task.

Applies to

共用方式為