public CodeScannerPage()
{
InitializeComponent();
// 取得這個頁面的檢視模型(ViewModel)物件
foo本頁面的檢視模型 = this.BindingContext as CodeScannerPageViewModel;
#region 指定要掃描的條碼類型
var fooMobileBarcodeScanningOptions = new MobileBarcodeScanningOptions();
fooMobileBarcodeScanningOptions.PossibleFormats = new List <ZXing.BarcodeFormat>()
{
BarcodeFormat.QR_CODE,
BarcodeFormat.CODE_128,
BarcodeFormat.CODE_39,
BarcodeFormat.CODABAR
};
#endregion
#region 建立條碼掃描控制項
zxing = new ZXingScannerView
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand,
AutomationId = "zxingScannerView",
};
#region 設定完成條碼掃描後，要進行處理的工作
zxing.OnScanResult += (result) =>
Device.BeginInvokeOnMainThread(async() =>
{
// 停止分析掃描條碼工作
zxing.IsAnalyzing = false;
// 將掃描結果回傳到首頁
foo本頁面的檢視模型._eventAggregator.GetEvent <ScanResultEvent>().Publish(result.Text);
// 回到上一頁
await foo本頁面的檢視模型._navigationService.GoBackAsync();
});
#endregion
#endregion
#region 建立條碼掃描遮罩
overlay = new ZXingDefaultOverlay
{
ShowFlashButton = zxing.HasTorch,
};
// 當按下 Flash 按鈕，就會顯示燈光，幫助更順利讀取條碼
overlay.FlashButtonClicked += (sender, e) =>
{
zxing.IsTorchOn = !zxing.IsTorchOn;
};
#endregion
// 將條碼掃描與分析控制項，加入到頁面上
ScannerGrid.Children.Add(zxing);
// 將遮罩加入到頁面上
ScannerGrid.Children.Add(overlay);
}
public CodeScannerPage()
{
InitializeComponent();
BindingContext = new CodeScannerPageViewModel();
}