LifetimeInformation Interface

Reference

Definition

Namespace:: EnvDTE80

Assembly:: EnvDTE80.dll

Assembly:: Microsoft.VisualStudio.Interop.dll

Package:: Microsoft.VisualStudio.Interop v17.11.40262

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.

Used to determine if an object has been deleted but not discarded by the garbage collector.

public interface class LifetimeInformation

public interface class LifetimeInformation

__interface LifetimeInformation

[System.Runtime.InteropServices.Guid("C8F4F9CC-B7E5-4458-BCE3-E1542468F26B")]
[System.Runtime.InteropServices.TypeLibType(4160)]
public interface LifetimeInformation

[System.Runtime.InteropServices.Guid("C8F4F9CC-B7E5-4458-BCE3-E1542468F26B")]
public interface LifetimeInformation

[<System.Runtime.InteropServices.Guid("C8F4F9CC-B7E5-4458-BCE3-E1542468F26B")>]
[<System.Runtime.InteropServices.TypeLibType(4160)>]
type LifetimeInformation = interface

[<System.Runtime.InteropServices.Guid("C8F4F9CC-B7E5-4458-BCE3-E1542468F26B")>]
type LifetimeInformation = interface

Public Interface LifetimeInformation

Attributes: GuidAttribute TypeLibTypeAttribute

Examples

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);  
}

Remarks

Use query interface (QI) for LifetimeInformation to determine whether an object has been deleted but not yet discarded by the garbage collector.

Properties

HasBeenDeleted

Gets a value indicating whether whether an object has been deleted but not yet discarded by the garbage collector.

Applies to

共用方式為