ApplicationDataCompositeValue class (Windows)

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

Syntax


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

Attributes

ActivatableAttribute(NTDDI_WIN8)
DualApiPartitionAttribute()
MarshalingBehaviorAttribute(Agile)
ThreadingAttribute(MTA)
VersionAttribute(NTDDI_WIN8)

Members

The ApplicationDataCompositeValue class has these types of members:

Constructors
Events
Methods
Properties

Constructors

The ApplicationDataCompositeValue class has these constructors.

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

Events

The ApplicationDataCompositeValue class has these events.

Event	Description
MapChanged	Occurs when the map changes.

Methods

The ApplicationDataCompositeValue class has these methods. With C#, Visual Basic, and C++, it also inherits methods from the Object class.

Method	Description
Add(KeyValuePair) [C#, VB]	Adds a new key-value pair to the ApplicationDataCompositeValue.
Add(String) [C#, VB]	Adds an item to the ApplicationDataCompositeValue.
Clear	Removes all application settings previously inserted into the composite value object, returning the object to its empty state.
Contains [C#, VB]	Returns a value that indicates whether a specified key-value pair exists in the ApplicationDataCompositeValue.
ContainsKey [C#, VB]	Returns a value that indicates whether a specified key exists in the ApplicationDataCompositeValue.
CopyTo [C#, VB]	Copies the elements of the collection to an array, starting at a particular array index.
First [C++, JavaScript]	Retrieves an iterator to enumerate the settings in the composite value.
GetView [C++, JavaScript]	Returns a read-only snapshot of the contents of the composite value.
HasKey [C++, JavaScript]	Determines whether there is an application setting with the specified key.
Insert [C++, JavaScript]	Creates or replaces an application setting.
Lookup [C++, JavaScript]	Retrieves the specified application setting.
Remove [C++, JavaScript]	Removes the specified application setting.
Remove(KeyValuePair) [C#, VB]	Removes a specific key-value pair from the ApplicationDataCompositeValue.
Remove(String) [C#, VB]	Removes a specific item from the ApplicationDataCompositeValue.
TryGetValue [C#, VB]	Returns a value that indicates whether a specified key exists in the ApplicationDataCompositeValue. If an item with that key exists, the item is retrieved as an out parameter.

Properties

The ApplicationDataCompositeValue class has these properties.

Property	Access type	Description
Count [C#, VB]	Read-only	Gets the number of elements contained in the collection.
IsReadOnly [C#, VB]	Read-only	Gets a value indicating whether the dictionary is read-only.
Item [C#, VB]	Read/write	Gets or sets the element value at the specified key index.
Keys [C#, VB]	Read-only	Gets an ICollection object containing the keys of the ApplicationDataCompositeValue.
Size [C++, JavaScript]	Read-only	Gets the number of related application settings.
Values [C#, VB]	Read-only	Gets an ICollection object containing the values of the ApplicationDataCompositeValue .

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.

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.

JavaScript

C++


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");

Requirements

Minimum supported client	Windows 8 [Windows Store apps, desktop apps]
Minimum supported server	Windows Server 2012 [Windows Store apps, desktop apps]
Namespace	Windows.Storage Windows::Storage [C++]
Metadata	Windows.winmd
DLL	Windows.Storage.ApplicationData.dll

ApplicationDataCompositeValue class