ApplicationDataCompositeValue Classe
Definizione
Importante
Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.
Rappresenta le impostazioni dell'app correlate che devono essere serializzate e deserializzate in modo atomico.
public ref class ApplicationDataCompositeValue sealed : IIterable<IKeyValuePair<Platform::String ^, Platform::Object ^> ^>, IMap<Platform::String ^, Platform::Object ^>, IObservableMap<Platform::String ^, Platform::Object ^>, IPropertySet
/// [Windows.Foundation.Metadata.Activatable(65536, Windows.Foundation.UniversalApiContract)]
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.MTA)]
class ApplicationDataCompositeValue final : IIterable<IKeyValuePair<winrt::hstring, IInspectable const&>>, IMap<winrt::hstring, IInspectable const&>, IObservableMap<winrt::hstring, IInspectable const&>, IPropertySet
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.MTA)]
/// [Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
class ApplicationDataCompositeValue final : IIterable<IKeyValuePair<winrt::hstring, IInspectable const&>>, IMap<winrt::hstring, IInspectable const&>, IObservableMap<winrt::hstring, IInspectable const&>, IPropertySet
[Windows.Foundation.Metadata.Activatable(65536, typeof(Windows.Foundation.UniversalApiContract))]
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.MTA)]
public sealed class ApplicationDataCompositeValue : IDictionary<string,object>, IEnumerable<KeyValuePair<string,object>>, IObservableMap<string,object>, IPropertySet
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.MTA)]
[Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
public sealed class ApplicationDataCompositeValue : IDictionary<string,object>, IEnumerable<KeyValuePair<string,object>>, IObservableMap<string,object>, IPropertySet
function ApplicationDataCompositeValue()
Public NotInheritable Class ApplicationDataCompositeValue
Implements IDictionary(Of String, Object), IEnumerable(Of KeyValuePair(Of String, Object)), IObservableMap(Of String, Object), IPropertySet
- Ereditarietà
- Attributi
- Implementazioni
-
IMap<K,V> IDictionary<K,V> IMap<String,Object> IDictionary<String,Object> IMap<Platform::String,Platform::Object> IMap<winrt::hstring,IInspectable> IIterable<IKeyValuePair<K,V>> IEnumerable<KeyValuePair<K,V>> IIterable<IKeyValuePair<String,Object>> IEnumerable<KeyValuePair<String,Object>> IIterable<IKeyValuePair<Platform::String,Platform::Object>> IIterable<IKeyValuePair<winrt::hstring,IInspectable>> IObservableMap<String,Object> IObservableMap<Platform::String,Platform::Object> IObservableMap<winrt::hstring,IInspectable> IPropertySet
Requisiti Windows
Famiglia di dispositivi |
Windows 10 (è stato introdotto in 10.0.10240.0)
|
API contract |
Windows.Foundation.UniversalApiContract (è stato introdotto in v1.0)
|
Esempio
Questo esempio crea e legge un'impostazione composita denominata exampleCompositeSetting
.
Chiamare il metodo Remove per eliminare l'impostazione al termine dell'operazione exampleCompositeSetting
.
Windows.Storage.ApplicationDataContainer localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
// Create a composite setting
Windows.Storage.ApplicationDataCompositeValue composite = new Windows.Storage.ApplicationDataCompositeValue();
composite["intVal"] = 1;
composite["strVal"] = "string";
localSettings.Values["exampleCompositeSetting"] = composite;
// Read data from a composite setting
Windows.Storage.ApplicationDataCompositeValue composite =
(Windows.Storage.ApplicationDataCompositeValue)localSettings.Values["exampleCompositeSetting"];
if (composite == null)
{
// No data
}
else
{
// Access data in composite["intVal"] and composite["strVal"]
}
// Delete a composite setting
localSettings.Values.Remove("exampleCompositeSetting");
Windows::Storage::ApplicationDataContainer localSettings{
Windows::Storage::ApplicationData::Current().LocalSettings() };
auto values{ localSettings.Values() };
{
// Create a composite setting.
Windows::Storage::ApplicationDataCompositeValue composite;
composite.Insert(L"intVal", Windows::Foundation::PropertyValue::CreateInt32(1));
composite.Insert(L"strVal", Windows::Foundation::PropertyValue::CreateString(L"string"));
values.Insert(L"exampleCompositeSetting", composite);
}
{
// Read data from a composite setting.
Windows::Storage::ApplicationDataCompositeValue composite{ values.Lookup(L"exampleCompositeSetting").as<Windows::Storage::ApplicationDataCompositeValue>() };
if (composite == nullptr)
{
// No data
}
else
{
int32_t one{ winrt::unbox_value<int32_t>(composite.Lookup(L"intVal")) };
winrt::hstring hello{ winrt::unbox_value<winrt::hstring>(composite.Lookup(L"strVal")) };
}
}
// Delete a composite setting.
values.Remove(L"exampleCompositeSetting");
ApplicationDataContainer^ localSettings = ApplicationData::Current->LocalSettings;
// Create a composite setting
ApplicationDataCompositeValue^ composite = ref new ApplicationDataCompositeValue();
composite->Insert("intVal", dynamic_cast<PropertyValue^>(PropertyValue::CreateInt32(1)));
composite->Insert("strVal", dynamic_cast<PropertyValue^>(PropertyValue::CreateString("string")));
auto values = localSettings->Values;
values->Insert("exampleCompositeSetting", composite);
// Read data from a composite setting
composite = safe_cast<ApplicationDataCompositeValue^>(localSettings->Values->Lookup("exampleCompositeSetting"));
if (composite == nullptr)
{
// No data
}
else
{
int one = safe_cast<IPropertyValue^>(composite->Lookup("intVal"))->GetInt32();
String^ hello = safe_cast<String^>(composite->Lookup("strVal"));
}
// Delete a composite setting
values->Remove("exampleCompositeSetting");
Dim localSettings As Windows.Storage.ApplicationDataContainer = Windows.Storage.ApplicationData.Current.LocalSettings
' Create a composite setting
Dim composite As New Windows.Storage.ApplicationDataCompositeValue
composite("intVal") = 1
composite("strVal") = "string";
localSettings.Values("exampleCompositeSetting") = composite
' Read data from a composite setting
Dim composite As Windows.Storage.ApplicationDataCompositeValue =
CType(localSettings.Values("exampleCompositeSetting"), Windows.Storage.ApplicationDataCompositeValue)
If composite Is Nothing Then
' No data
Else
' Access data in composite("intVal") and composite("strVal")
End If
' Delete a composite setting
localSettings.Values.Remove("exampleCompositeSetting")
Commenti
Un'impostazione composita viene serializzata inserendola in una mappa delle impostazioni e deserializzata cercandola dalla mappa.
Elenchi di membri della raccolta
Per JavaScript, ApplicationDataCompositeValue supporta l'uso di un indice per accedere agli elementi.
Costruttori
ApplicationDataCompositeValue() |
Crea e inizializza un nuovo, inizialmente vuoto, istanza dell'oggetto. |
Proprietà
Size |
Ottiene il numero di impostazioni dell'applicazione correlate. |
Metodi
Clear() |
Rimuove tutte le impostazioni dell'applicazione inserite in precedenza nell'oggetto valore composito, restituendo l'oggetto allo stato vuoto. |
First() |
Recupera un iteratore per enumerare le impostazioni nel valore composito. |
GetView() |
Restituisce uno snapshot di sola lettura del contenuto del valore composito. |
HasKey(String) |
Determina se è presente un'impostazione dell'applicazione con la chiave specificata. |
Insert(String, Object) |
Crea o sostituisce un'impostazione dell'applicazione. |
Lookup(String) |
Recupera l'impostazione dell'applicazione specificata. |
Remove(String) |
Rimuove il valore con la chiave specificata. |
Eventi
MapChanged |
Si verifica quando la mappa cambia. |