ApplicationDataCompositeValue ApplicationDataCompositeValue ApplicationDataCompositeValue ApplicationDataCompositeValue ApplicationDataCompositeValue Class

Definition

Namespace:: Windows.Storage Windows.Storage Windows.Storage Windows.Storage Windows.Storage

Edit

Represents related app settings that must be serialized and deserialized atomically.

public : sealed class ApplicationDataCompositeValue : IIterable<IKeyValuePair<Platform::String, Platform::Object>>, IMap<Platform::String, Platform::Object>, IObservableMap<Platform::String, Platform::Object>, IPropertySet

struct winrt::Windows::Storage::ApplicationDataCompositeValue : IIterable<IKeyValuePair<Platform::String, Platform::Object>>, IMap<Platform::String, Platform::Object>, IObservableMap<Platform::String, Platform::Object>, IPropertySet

public sealed class ApplicationDataCompositeValue : IEnumerable<KeyValuePair<String, Object>>, IDictionary<String, Object>, IObservableMap<String, Object>, IPropertySet

Public NotInheritable Class ApplicationDataCompositeValue Implements IEnumerable<KeyValuePair<String, Object>>, IDictionary<String, Object>, IObservableMap<String, Object>, IPropertySet

var applicationDataCompositeValue = new applicationDataCompositeValue();

Attributes: ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Windows 10 requirements

Device family	Windows 10 (introduced v10.0.10240.0)
API contract	Windows.Foundation.UniversalApiContract (introduced v1)

Examples

This example creates and reads a composite setting named exampleCompositeSetting.

Call the Remove | remove method to delete the exampleCompositeSetting setting when you have finished with it.

var applicationData = Windows.Storage.ApplicationData.current;

var localSettings = applicationData.localSettings;

// Create a composite setting

var composite = new Windows.Storage.ApplicationDataCompositeValue();
composite["intVal"] = 1;
composite["strVal"] = "string";

localSettings.values["exampleCompositeSetting"] = composite;

// Read data from a composite setting

var composite = localSettings.values["exampleCompositeSetting"];

if (!composite)
{
    // 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;

// 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");

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")

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

ApplicationDataCompositeValue^ 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");

Remarks

A composite setting is serialized by inserting it into a settings map and deserialized by looking it up from the map.

Collection member lists

For JavaScript, ApplicationDataCompositeValue supports using an index to access items.

Constructors

ApplicationDataCompositeValue() ApplicationDataCompositeValue() ApplicationDataCompositeValue() ApplicationDataCompositeValue() ApplicationDataCompositeValue()

Creates and initializes a new, initially empty, instance of the object.

Properties

Item[TKey] Item[TKey] Item[TKey] Item[TKey] Item[TKey]	Gets or sets the element with the specified key.
Keys Keys Keys Keys Keys	Gets an System.Collections.Generic.ICollection`1 containing the keys of the System.Collections.Generic.IDictionary`2.
Size Size Size Size Size	Gets the number of related application settings.
Values Values Values Values Values	Gets an System.Collections.Generic.ICollection`1 containing the values in the System.Collections.Generic.IDictionary`2.

Methods

Add(TKey, TValue) Add(TKey, TValue) Add(TKey, TValue) Add(TKey, TValue) Add(TKey, TValue)	Adds an element with the provided key and value to the System.Collections.Generic.IDictionary`2.
Clear() Clear() Clear() Clear() Clear()	Removes all application settings previously inserted into the composite value object, returning the object to its empty state.
ContainsKey(TKey) ContainsKey(TKey) ContainsKey(TKey) ContainsKey(TKey) ContainsKey(TKey)	Determines whether the System.Collections.Generic.IDictionary`2 contains an element with the specified key.
First() First() First() First() First()	Retrieves an iterator to enumerate the settings in the composite value.
GetEnumerator() GetEnumerator() GetEnumerator() GetEnumerator() GetEnumerator()	Returns an enumerator that iterates through the collection.
GetView() GetView() GetView() GetView() GetView()	Returns a read-only snapshot of the contents of the composite value.
HasKey(String) HasKey(String) HasKey(String) HasKey(String) HasKey(String)	Determines whether there is an application setting with the specified key.
Insert(String, Object) Insert(String, Object) Insert(String, Object) Insert(String, Object) Insert(String, Object)	Creates or replaces an application setting.
Lookup(String) Lookup(String) Lookup(String) Lookup(String) Lookup(String)	Retrieves the specified application setting.
Remove(T) Remove(T) Remove(T) Remove(T) Remove(T)	Removes the element with the specified key from the System.Collections.Generic.IDictionary`2.
Remove(String) Remove(String) Remove(String) Remove(String) Remove(String)	Removes the value with the specified key.
TryGetValue(TKey, out TValue) TryGetValue(TKey, out TValue) TryGetValue(TKey, out TValue) TryGetValue(TKey, out TValue) TryGetValue(TKey, out TValue)	Gets the value associated with the specified key.

Events

MapChanged MapChanged MapChanged MapChanged MapChanged

Occurs when the map changes.