ContactAnnotationList.DeleteAsync Method
Definition
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.
Asynchronously deletes this ContactAnnotationList from the ContactAnnotationStore.
public:
virtual IAsyncAction ^ DeleteAsync() = DeleteAsync;/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncAction DeleteAsync();[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncAction DeleteAsync();function deleteAsync()Public Function DeleteAsync () As IAsyncActionReturns
An async action indicating that the operation has completed.
- Attributes
Windows requirements
| App capabilities |
contactsSystem
|
Examples
The following example provides reusable methods for creating an annotation list, deleting a specific annotation list, and deleting all annotation lists in a store.
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;
}