Application​Data​Composite​Value Application​Data​Composite​Value Application​Data​Composite​Value Class

Definition

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

Edit 
public sealed class ApplicationDataCompositeValue : IIterable, IMap, IObservableMap, IPropertySetpublic sealed class ApplicationDataCompositeValue : IEnumerable, IDictionary, IObservableMap, IPropertySetPublic NotInheritable Class ApplicationDataCompositeValue Implements IEnumerable, IDictionary, IObservableMap, IPropertySet
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)

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.

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");

Constructors

ApplicationDataCompositeValue() ApplicationDataCompositeValue() ApplicationDataCompositeValue()

Edit

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

public ApplicationDataCompositeValue()public ApplicationDataCompositeValue()Public Sub New()
Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute
See Also
Quickstart: Local application data (JavaScript)
Store and retrieve settings and other app data
Quickstart: Roaming application data (JavaScript)
Store and retrieve settings and other app data
Store and retrieve settings and other app data

Properties

Item[TKey] Item[TKey] Item[TKey]

Edit

Gets or sets the element with the specified key.

This member is not implemented in C++TValue this[TKey key] { get; set; }Property Item(key As TKey) As TValue
Parameters
key
TKey TKey TKey

The key of the element to get or set.

Value
TValue TValue TValue

The element with the specified key.

Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute
Exceptions
System.ArgumentNullException System.ArgumentNullException System.ArgumentNullException

key is null.

System.Collections.Generic.KeyNotFoundException System.Collections.Generic.KeyNotFoundException System.Collections.Generic.KeyNotFoundException

The property is retrieved and key is not found.

System.NotSupportedException System.NotSupportedException System.NotSupportedException

The property is set and the System.Collections.Generic.IDictionary`2 is read-only.

See Also
System.Collections.Generic.ICollection<T>.IsReadOnlySystem.Collections.Generic.ICollection<T>.IsReadOnlySystem.Collections.Generic.ICollection<T>.IsReadOnly

Keys Keys Keys

Edit

Gets an System.Collections.Generic.ICollection`1 containing the keys of the System.Collections.Generic.IDictionary`2.

This member is not implemented in C++ICollection<TKey> Keys { get; }ReadOnly Property Keys As ICollection(Of TKey)
Value
System.Collections.Generic.ICollection<TKey> System.Collections.Generic.ICollection<TKey> System.Collections.Generic.ICollection<TKey>

An System.Collections.Generic.ICollection`1 containing the keys of the object that implements System.Collections.Generic.IDictionary`2.

Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute
See Also
System.Collections.Generic.ICollection<T>System.Collections.Generic.ICollection<T>System.Collections.Generic.ICollection<T>

Size Size Size

Edit

Gets the number of related application settings.

public unsigned short Size { get; }This member is not implemented in C#This member is not implemented in VB.Net
Value
uint uint uint

The number of related settings.

Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Values Values Values

Edit

Gets an System.Collections.Generic.ICollection`1 containing the values in the System.Collections.Generic.IDictionary`2.

This member is not implemented in C++ICollection<TValue> Values { get; }ReadOnly Property Values As ICollection(Of TValue)
Value
System.Collections.Generic.ICollection<TValue> System.Collections.Generic.ICollection<TValue> System.Collections.Generic.ICollection<TValue>

An System.Collections.Generic.ICollection`1 containing the values in the object that implements System.Collections.Generic.IDictionary`2.

Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute
See Also
System.Collections.Generic.ICollection<T>System.Collections.Generic.ICollection<T>System.Collections.Generic.ICollection<T>

Methods

Add(TKey, TValue) Add(TKey, TValue) Add(TKey, TValue)

Edit

Adds an element with the provided key and value to the System.Collections.Generic.IDictionary`2.

This member is not implemented in C++void Add(TKey key, TValue value)Sub Add(key As TKey, value As TValue)
Parameters
key
TKey TKey TKey

The object to use as the key of the element to add.

value
TValue TValue TValue

The object to use as the value of the element to add.

Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute
Exceptions
System.ArgumentNullException System.ArgumentNullException System.ArgumentNullException

key is null.

System.ArgumentException System.ArgumentException System.ArgumentException

An element with the same key already exists in the System.Collections.Generic.IDictionary`2.

System.NotSupportedException System.NotSupportedException System.NotSupportedException

The System.Collections.Generic.IDictionary`2 is read-only.

See Also
System.Collections.Generic.ICollection<T>.IsReadOnlySystem.Collections.Generic.ICollection<T>.IsReadOnlySystem.Collections.Generic.ICollection<T>.IsReadOnly

Clear() Clear() Clear()

Edit

Removes all application settings previously inserted into the composite value object, returning the object to its empty state.

public void Clear()This member is not implemented in C#This member is not implemented in VB.Net
Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute

ContainsKey(TKey) ContainsKey(TKey) ContainsKey(TKey)

Edit

Determines whether the System.Collections.Generic.IDictionary`2 contains an element with the specified key.

This member is not implemented in C++bool ContainsKey(TKey key)Function ContainsKey(key As TKey) As Boolean
Parameters
key
TKey TKey TKey

The key to locate in the System.Collections.Generic.IDictionary`2.

Returns
System.Boolean System.Boolean System.Boolean

true if the System.Collections.Generic.IDictionary`2 contains an element with the key; otherwise, false.

Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute
Exceptions
System.ArgumentNullException System.ArgumentNullException System.ArgumentNullException

key is null.

First() First() First()

Edit

Retrieves an iterator to enumerate the settings in the composite value.

public IIterator<IKeyValuePair<string, object>> First()This member is not implemented in C#This member is not implemented in VB.Net
Returns

The iterator.

Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Remarks

This iterator remains valid even if the composite value's contents are mutated. If the composite value is mutated, you must get a new iterator to see the updated contents of the composite value.

GetEnumerator() GetEnumerator() GetEnumerator()

Edit

Returns an enumerator that iterates through the collection.

This member is not implemented in C++IEnumerator<T> GetEnumerator()Function GetEnumerator As IEnumerator(Of T)
Returns
System.Collections.Generic.IEnumerator<T> System.Collections.Generic.IEnumerator<T> System.Collections.Generic.IEnumerator<T>

An enumerator that can be used to iterate through the collection.

Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute
See Also
System.Collections.Generic.IEnumerator<T>System.Collections.Generic.IEnumerator<T>System.Collections.Generic.IEnumerator<T>

GetView() GetView() GetView()

Edit

Returns a read-only snapshot of the contents of the composite value.

public IMapView<string, object> GetView()This member is not implemented in C#This member is not implemented in VB.Net
Returns

The view of the composite value.

Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Remarks

If the composite value is mutated, you must get a new view to see the updated contents of the composite value.

HasKey(String) HasKey(String) HasKey(String)

Edit

Determines whether there is an application setting with the specified key.

public PlatForm::Boolean HasKey(String key)This member is not implemented in C#This member is not implemented in VB.Net
Parameters
key
System.String System.String System.String

The key.

Returns
bool bool bool

True if the key is found; otherwise false.

Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Insert(String, Object) Insert(String, Object) Insert(String, Object)

Edit

Creates or replaces an application setting.

public PlatForm::Boolean Insert(String key, Object value)This member is not implemented in C#This member is not implemented in VB.Net
Parameters
key
System.String System.String System.String

The key of the setting to insert or replace.

value
System.Object System.Object System.Object

The setting value.

Returns
bool bool bool

True if an item with the specified key is an existing item and was replaced; otherwise, false.

Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Lookup(String) Lookup(String) Lookup(String)

Edit

Retrieves the specified application setting.

public PlatForm::Object Lookup(String key)This member is not implemented in C#This member is not implemented in VB.Net
Parameters
key
System.String System.String System.String

The key of the setting.

Returns
object object object

The value, if an item with the specified key exists. Use the HasKey method to determine whether the key exists.

Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Remove(TKey) Remove(TKey) Remove(TKey)

Edit

Removes the element with the specified key from the System.Collections.Generic.IDictionary`2.

This member is not implemented in C++bool Remove(TKey key)Function Remove(key As TKey) As Boolean
Parameters
key
TKey TKey TKey

The key of the element to remove.

Returns
System.Boolean System.Boolean System.Boolean

true if the element is successfully removed; otherwise, false. This method also returns false if key was not found in the original System.Collections.Generic.IDictionary`2.

Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute
Exceptions
System.ArgumentNullException System.ArgumentNullException System.ArgumentNullException

key is null.

System.NotSupportedException System.NotSupportedException System.NotSupportedException

The System.Collections.Generic.IDictionary`2 is read-only.

See Also
System.Collections.Generic.ICollection<T>.IsReadOnlySystem.Collections.Generic.ICollection<T>.IsReadOnlySystem.Collections.Generic.ICollection<T>.IsReadOnly

Remove(String) Remove(String) Remove(String)

Edit

Removes the value with the specified key.

public void Remove(String key)This member is not implemented in C#This member is not implemented in VB.Net
Parameters
key
System.String System.String System.String

The key of the value to remove.

Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute

TryGetValue(TKey, out TValue) TryGetValue(TKey, out TValue) TryGetValue(TKey, out TValue)

Edit

Gets the value associated with the specified key.

This member is not implemented in C++bool TryGetValue(TKey key, out TValue value)Function TryGetValue(key As TKey, ByRef value As TValue) As Boolean
Parameters
key
TKey TKey TKey

The key whose value to get.

value
TValue TValue TValue

When this method returns, the value associated with the specified key, if the key is found; otherwise, the default value for the type of the value parameter. This parameter is passed uninitialized.

Returns
System.Boolean System.Boolean System.Boolean

true if the object that implements System.Collections.Generic.IDictionary`2 contains an element with the specified key; otherwise, false.

Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute
Exceptions
System.ArgumentNullException System.ArgumentNullException System.ArgumentNullException

key is null.

Events

MapChanged MapChanged MapChanged

Edit

Occurs when the map changes.

public event MapChangedEventHandler MapChangedpublic event MapChangedEventHandler MapChangedPublic Event MapChanged
Attributes
ActivatableAttribute ContractVersionAttribute DualApiPartitionAttribute MarshalingBehaviorAttribute ThreadingAttribute

See Also