ClaimedBarcodeScanner.EnableAsync 方法

定義

命名空間:

Windows.Devices.PointOfService

取得條碼掃描器為 DataReceived 事件的就緒狀態。

public:
 virtual IAsyncAction ^ EnableAsync() = EnableAsync;

/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncAction EnableAsync();

[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncAction EnableAsync();

function enableAsync()

Public Function EnableAsync () As IAsyncAction

傳回

IAsyncAction

這個方法完成時不會傳回任何物件或值。

屬性

RemoteAsyncAttribute

範例

// Enables the barcode scanner to receive data.
task<void> Scenario1::EnableScanner()
{
    return create_task(claimedScanner->EnableAsync()).then([this](void)
    {
        // UpdateOutput("Barcode scanner enabled successfully.");
    });
}	

// Enables the barcode scanner to receive data 

private async Task<bool> EnableScanner()
{
    if (claimedScanner == null)
    {
        return false;   
    }
    else
    {   
        await claimedScanner.EnableAsync();
      
        return true;
    }            
}