[英]Use ZXing.Net.Mobile result.text as input for WebView
我目前正在尝试为Windows 10创建一个条形码扫描仪UWP App。其目的是我想使用扫描的条形码作为Web搜索的输入。
我使用了详细记录的ZXing.Net.Mobile软件包,并且已经在应用程序中运行了扫描仪。 扫描仪启动,扫描条形码,结果显示在消息框中。 我在MainPage.xaml.cs中使用了以下代码行:
MobileBarcodeScanner scanner;
public MainPage()
{
//Create a new instance of our scanner
scanner = new MobileBarcodeScanner(this.Dispatcher);
scanner.RootFrame = this.Frame;
this.Loaded += MainPage_Loaded;
}
private void MainPage_Loaded(object sender, RoutedEventArgs e)
{
//Tell our scanner to use the default overlay
scanner.UseCustomOverlay = false;
//We can customize the top and bottom text of our default overlay
scanner.TopText = "Hold camera up to barcode";
scanner.BottomText = "Camera will automatically scan barcode\r\n\r\n" +
"Press the 'Back' button to Cancel";
//Start scanning
scanner.Scan().ContinueWith(t =>
{
if (t.Result != null)
HandleScanResult(t.Result);
});
}
async void HandleScanResult(ZXing.Result result)
{
string msg = "";
if (result != null && !string.IsNullOrEmpty(result.Text))
msg = "Found Barcode: " + result.Text;
else
msg = "Scanning Canceled!";
await MessageBox(msg);
}
async Task MessageBox(string text)
{
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async () =>
{
var dialog = new MessageDialog(text);
await dialog.ShowAsync();
});
}
但是,我不希望扫描结果显示在消息框中。 我想将其用于网络搜索。 因此,我在MainPage.xaml页面中创建了一个名为SearchURI的WebView:
<WebView Name="SearchURI" />
然后,我测试了Basic函数,导航到Google fo实例,并且工作正常:
public MainPage()
{
SearchURI.Navigate(new Uri("https://www.google.com"));
}
然后,我尝试调整HandleScanResult以将result.text添加到预定义的Uri,并在WebView“ SearchURI”中打开组合的Uri,同时尝试保留消息框以防扫描被取消。
async void HandleScanResult(ZXing.Result result)
{
string msg = "";
if (result != null && !string.IsNullOrEmpty(result.Text))
SearchURI.Navigate(new Uri(
"https://www.google.com/?gfe_rd=cr&ei=ccRwWIS7D8ao8weY9b_ADA#q=" + result.Text));
else
msg = "Scanning Canceled!";
await MessageBox(msg);
}
但是,这些代码行会遇到错误。
有人可以帮助我调整《准则》以使其正常工作吗? 谢谢!
在Dispatcher
Navigate
await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, async () =>
{
SearchURI.Navigate(new Uri("https://www.google.com/?gfe_rd=cr&ei=ccRwWIS7D8ao8weY9b_ADA#q=" + result.Text));
});
实际上,这很容易。 以下完美的工作方式:
private async void ScanButton_Click(object sender, RoutedEventArgs e)
{
var scanner = new MobileBarcodeScanner(this.Dispatcher);
scanner.UseCustomOverlay = false;
scanner.TopText = "Halte die Kamera vor den Barcode";
scanner.BottomText = "Kamera scannt den Barcode automatisch\r\n\rDrücke 'zurück' zum abbrechen";
var result = await scanner.Scan();
SearchURI.Navigate(new Uri("https://www.google.com/?gfe_rd=cr&ei=ccRwWIS7D8ao8weY9b_ADA#q=" + result.Text));
}
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