LifetimeInformation 接口

用于确定对象是否已被删除但未被垃圾回收器丢弃。

命名空间：  EnvDTE80
程序集：  EnvDTE80（在 EnvDTE80.dll 中）

语法

声明
<GuidAttribute("C8F4F9CC-B7E5-4458-BCE3-E1542468F26B")> _
Public Interface LifetimeInformation

[GuidAttribute("C8F4F9CC-B7E5-4458-BCE3-E1542468F26B")]
public interface LifetimeInformation

[GuidAttribute(L"C8F4F9CC-B7E5-4458-BCE3-E1542468F26B")]
public interface class LifetimeInformation

[<GuidAttribute("C8F4F9CC-B7E5-4458-BCE3-E1542468F26B")>]
type LifetimeInformation =  interface end

public interface LifetimeInformation

LifetimeInformation 类型公开以下成员。

属性

	名称	说明
	HasBeenDeleted	获取一个值，该值指示对象是否已被删除但尚未被垃圾回收器丢弃。

页首

备注

使用 LifetimeInformation 的查询接口 (QI) 确定对象是否已被删除但尚未被垃圾回收器丢弃。

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);
}

请参见

参考

EnvDTE80 命名空间

其他资源

如何：编译和运行自动化对象模型代码示例