GattCharacteristic.ReadValueAsync 方法

定義

命名空間:

Windows.Devices.Bluetooth.GenericAttributeProfile

多載

ReadValueAsync()	執行從 Windows 維護的值快取讀取的特性值。
ReadValueAsync(BluetoothCacheMode)	從 Windows 維護的值快取或直接從裝置執行特性值讀取。

ReadValueAsync()

執行從 Windows 維護的值快取讀取的特性值。

public:
 virtual IAsyncOperation<GattReadResult ^> ^ ReadValueAsync() = ReadValueAsync;

/// [Windows.Foundation.Metadata.Overload("ReadValueAsync")]
/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncOperation<GattReadResult> ReadValueAsync();

[Windows.Foundation.Metadata.Overload("ReadValueAsync")]
[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncOperation<GattReadResult> ReadValueAsync();

function readValueAsync()

Public Function ReadValueAsync () As IAsyncOperation(Of GattReadResult)

傳回

IAsyncOperation<GattReadResult>

管理非同步作業所需的物件，完成時會傳回 GattReadResult 物件，該物件接著會包含非同步作業的完成狀態，如果成功，則會從裝置讀取資料。

屬性

OverloadAttribute RemoteAsyncAttribute

Windows 需求

應用程式功能

bluetooth

另請參閱

• ReadValueAsync(BluetoothCacheMode)

ReadValueAsync(BluetoothCacheMode)

從 Windows 維護的值快取或直接從裝置執行特性值讀取。

public:
 virtual IAsyncOperation<GattReadResult ^> ^ ReadValueAsync(BluetoothCacheMode cacheMode) = ReadValueAsync;

/// [Windows.Foundation.Metadata.Overload("ReadValueWithCacheModeAsync")]
/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncOperation<GattReadResult> ReadValueAsync(BluetoothCacheMode const& cacheMode);

[Windows.Foundation.Metadata.Overload("ReadValueWithCacheModeAsync")]
[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncOperation<GattReadResult> ReadValueAsync(BluetoothCacheMode cacheMode);

function readValueAsync(cacheMode)

Public Function ReadValueAsync (cacheMode As BluetoothCacheMode) As IAsyncOperation(Of GattReadResult)

參數

cacheMode

BluetoothCacheMode

指定是否要直接從裝置或 Windows 維護的值快取讀取值。

傳回

IAsyncOperation<GattReadResult>

管理非同步作業所需的物件，完成時會傳回 GattReadResult 物件，該物件接著會包含非同步作業的完成狀態，如果成功，則會從裝置讀取資料。

屬性

OverloadAttribute RemoteAsyncAttribute

Windows 需求

應用程式功能

bluetooth

另請參閱

• ReadValueAsync()