DeviceInformationCollection Class

Definition

public ref class DeviceInformationCollection sealed : IIterable<DeviceInformation ^>, IVectorView<DeviceInformation ^>

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
class DeviceInformationCollection final : IIterable<DeviceInformation>, IVectorView<DeviceInformation>

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
public sealed class DeviceInformationCollection : IEnumerable<DeviceInformation>, IReadOnlyList<DeviceInformation>

Public NotInheritable Class DeviceInformationCollection
Implements IEnumerable(Of DeviceInformation), IReadOnlyList(Of DeviceInformation)

Inheritance

Object Platform::Object IInspectable DeviceInformationCollection

Attributes

ContractVersionAttribute MarshalingBehaviorAttribute

Implements

IIterable<T> IEnumerable<T> IIterable<DeviceInformation> IEnumerable<DeviceInformation> IVectorView<DeviceInformation> IReadOnlyList<DeviceInformation>

Windows requirements

Examples

var DeviceInformation = Enumeration.DeviceInformation;
DeviceInformation.findAllAsync(deviceClass).then(
 successCallback, 
 errorCallback
);

// Handles successful completion of the findAllAsync method.
function successCallback(deviceInformationCollection) {
 var numDevices = deviceInformationCollection.length;
 document.getElementById("statusMessage").innerHTML = 
 numDevices + " device interface(s) found";
 if (numDevices) {
 for (var i = 0; i < numDevices; i++) {
 printFriendlyNameAndID(deviceInformationCollection[i], 
 document.getElementById("Output"));
 }
 } else {
 document.getElementById("statusMessage").innerHTML = "No devices found";
 }
}

// Handles an error completion of the findAllAsync method.
function errorCallback(e) {
 document.getElementById("statusMessage").innerHTML = 
 "Failed to find devices, error: " + e.message;
}

Remarks

Successful completion of FindAllAsync results in a DeviceInformationCollection containing DeviceInformation objects.

Collection member lists

For JavaScript, DeviceInformationCollection has the members shown in the member lists. In addition, DeviceInformationCollection supports a length property, members of Array.prototype, and using an index to access items.

Enumerating the collection in C# or Microsoft Visual Basic

DeviceInformationCollection is enumerable, so you can use language-specific syntax such as foreach in C# to enumerate the items in the collection. The compiler does the type-casting for you and you won't need to cast to IEnumerable<DeviceInformation> explicitly. If you do need to cast explicitly, for example if you want to call GetEnumerator, cast to IEnumerable<T> with a DeviceInformation constraint.