LifetimeInformation.HasBeenDeleted 属性
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
获取一个值，该值表示对象是否已被删除但未被垃圾回收器丢弃。
public:
property bool HasBeenDeleted { bool get(); };public:
property bool HasBeenDeleted { bool get(); };[System.Runtime.InteropServices.DispId(1)]
public bool HasBeenDeleted { [System.Runtime.InteropServices.DispId(1)] get; }[<System.Runtime.InteropServices.DispId(1)>]
[<get: System.Runtime.InteropServices.DispId(1)>]
member this.HasBeenDeleted : boolPublic ReadOnly Property HasBeenDeleted As Boolean属性值
true 如果它后面的对象已被删除，则为;否则为 false 。
- 属性
示例
Sub TaskItemObjectLifetime(ByVal DTE As DTE2)
Dim tskItem As TaskItem
Dim tskItems As EnvDTE.TaskItems
Dim lifetimeInfo As LifetimeInformation
tskItems = DTE.ToolWindows.TaskList.TaskItems
tskItem = tskItems.Add("Category", "SubCategory", "Description", _
vsTaskPriority.vsTaskPriorityLow, EnvDTE.vsTaskIcon. _
vsTaskIconUser, True, "", -1, True, True)
tskItems.ForceItemsToTaskList()
lifetimeInfo = tskItem
MsgBox("Has task item been deleted? " & _
lifetimeInfo.HasBeenDeleted.ToString)
tskItem.Delete()
MsgBox("Has task item been deleted? " & _
lifetimeInfo.HasBeenDeleted.ToString)
End Sub
public void TaskItemObjectLifetime(DTE2 DTE)
{
TaskItem tskItem;
EnvDTE.TaskItems tskItems;
LifetimeInformation lifetimeInfo;
tskItems = DTE.ToolWindows.TaskList.TaskItems;
tskItem = tskItems.Add("Category", "SubCategory", "Description",
vsTaskPriority.vsTaskPriorityLow,
EnvDTE.vsTaskIcon.vsTaskIconUser, true, "", -1, true, true);
tskItems.ForceItemsToTaskList();
lifetimeInfo = (LifetimeInformation)tskItem;
MessageBox.Show("Has task item been deleted? " +
lifetimeInfo.HasBeenDeleted);
tskItem.Delete();
MessageBox.Show("Has task item been deleted? " +
lifetimeInfo.HasBeenDeleted);
}
注解
此属性用于表示您引用的对象不再有效，对该对象的任何调用都应该失败。