ContactAnnotationList.DeleteAsync 方法
定義
重要
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public:
virtual IAsyncAction ^ DeleteAsync() = DeleteAsync;/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncAction DeleteAsync();[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncAction DeleteAsync();function deleteAsync()Public Function DeleteAsync () As IAsyncAction傳回
非同步動作，表示作業已完成。
- 屬性
Windows 需求
| 應用程式功能 |
contactsSystem
|
範例
下列範例提供可重複使用的方法，可用來建立批註清單、刪除特定批註清單，以及刪除存放區中的所有批註清單。
public async Task<ContactAnnotationList> CreateAnnotationList()
{
// Get the data store.
ContactAnnotationStore store = await ContactManager.RequestAnnotationStoreAsync(ContactAnnotationStoreAccessType.AppAnnotationsReadWrite);
// Create a new list.
ContactAnnotationList list = await store.CreateAnnotationListAsync();
// Find the list to verify it was created.
IReadOnlyList<ContactAnnotationList> lists = await store.FindAnnotationListsAsync();
for (int i = 0; i < lists.Count; i++)
{
// Do the IDs match?
if (list.Id == lists[i].Id)
{
// Found it! Return the new list.
return(list);
}
}
// List not created, return null.
return(null);
}
public async Task<Boolean> DeleteAnnotationList(string listId)
{
// Get the store.
ContactAnnotationStore store = await ContactManager.RequestAnnotationStoreAsync(ContactAnnotationStoreAccessType.AppAnnotationsReadWrite);
// Find the list.
ContactAnnotationList list = await store.GetAnnotationListAsync(listId);
// Make sure we got it.
if (list.Id == listId)
{
// Delete the list.
await list.DeleteAsync();
return true;
}
return false;
}
public async Task<Boolean> DeleteAllAnnotationLists()
{
// Get the store.
ContactAnnotationStore store = await ContactManager.RequestAnnotationStoreAsync(ContactAnnotationStoreAccessType.AppAnnotationsReadWrite);
IReadOnlyList<ContactAnnotationList> lists = await store.FindAnnotationListsAsync();
// Make sure at least one annotation list exists.
if (lists.Count > 0)
{
// Find the list.
for (int i = 0; i < lists.Count; i++)
{
await lists[i].DeleteAsync();
}
return true;
}
return false;
}