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Read write barcode data without using barcode scanner device


Read write barcode data without using barcode scanner device

By : CarlP
Date : November 22 2020, 03:03 PM
fixed the issue. Will look into that further I am working on Logistics and package management application. I have already generated bar code in My application. But I have no bar-code device for reading bar code. , You can read barcode from image. Which is something like
code :
private String[] ReadBarcodeFromBitmap(Bitmap _bimapimage)
{
    System.Drawing.Bitmap objImage = _bimapimage;
    String[] barcodes = BarcodeScanner.Scan(objImage, BarcodeType.Code39);
    return barcodes;
}


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Reading a barcode using a USB barcode scanner along with ignoring keyboard data input while scanner product id and vendo

Reading a barcode using a USB barcode scanner along with ignoring keyboard data input while scanner product id and vendo


By : m88
Date : March 29 2020, 07:55 AM
help you fix your problem There is a way to differentiate between keyboard and USB barcode reader
You can depend on these facts:
code :
Public Class Form1

Dim BarcodeStr As String = ""
Dim IsBarcodeTaken As Boolean = False
Dim Str As String = ""
Dim str3 As String = ""


Private Sub Form1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown

    If Timer1.Enabled = False Then
        Str = TextBox1.Text
        str3 = TextBox3.Text
    End If

End Sub

Private Sub Form1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles Me.KeyPress
    If Timer1.Enabled = False Then
        Timer1.Enabled = True
    End If


    BarcodeStr = BarcodeStr & e.KeyChar
    If Asc(e.KeyChar) = 13 And Len(BarcodeStr) >= 4 Then
        IsBarcodeTaken = True
        TextBox2.Text = BarcodeStr


    End If

End Sub
Private Sub Form1_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyUp
    If IsBarcodeTaken = True Then
        TextBox1.Text = Str
        TextBox1.Select(Len(TextBox1.Text), 0)
        Str = ""

        TextBox3.Text = str3
        TextBox3.Select(Len(TextBox3.Text), 0)
        str3 = ""
    End If

End Sub


Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
    BarcodeStr = ""
    IsBarcodeTaken = False
    Timer1.Enabled = False
End Sub


Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    TextBox2.Text = ""

End Sub

End Class
How to read data from bluetooth barcode scanner Symbol CS3070 to Android Device

How to read data from bluetooth barcode scanner Symbol CS3070 to Android Device


By : Nagendra Prajwal
Date : March 29 2020, 07:55 AM
this one helps. I just received my device and when I paired and connected the device it automatically sends the data to the currently focused EditText. What version of Android are you using because I tried it on ICS and JB and it worked this way. I have not tested it in any earlier versions.
Edit:
code :
btAdapter = BluetoothAdapter.getDefaultAdapter();
if (btAdapter.isEnabled())
{
    new BluetoothConnect().execute("");
}

public class BluetoothConnect extends AsyncTask<String, String, Void>
{
    public static String MY_UUID = "00001101-0000-1000-8000-00805F9B34FB";

    @Override
    protected Void doInBackground(String... params)
    {
        String address = DB.GetOption("bluetoothAddress");
        BluetoothDevice device = btAdapter.getRemoteDevice(address);
        try
        {
            socket = device.createRfcommSocketToServiceRecord(UUID.fromString(MY_UUID));
            btAdapter.cancelDiscovery();
            socket.connect();
            InputStream stream = socket.getInputStream();
            int read = 0;
            byte[] buffer = new byte[128];
            do
            {
                try
                {
                    read = stream.read(buffer);
                    String data = new String(buffer, 0, read);
                    publishProgress(data);
                }
                catch(Exception ex)
                {
                    read = -1;
                }
            }
            while (read > 0);
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onProgressUpdate(String... values)
    {
        if (values[0].equals("\r"))
        {
            addToList(input.getText().toString());
            pickupInput.setText("");
        }
        else input.setText(values[0]);
        super.onProgressUpdate(values);
    }
}
How to read the barcode value from barcode scanner in C# Winforms

How to read the barcode value from barcode scanner in C# Winforms


By : Zoltán Nádas
Date : March 29 2020, 07:55 AM
Hope this helps Usually barcode scanners read the value and send the read data to computer like key strokes.
First, install the drivers of barcode scanner if any. Then
Is there a way to read the barcode from a barcode scanner device?

Is there a way to read the barcode from a barcode scanner device?


By : Indra Ganiarto
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Set the forms KeyPreview event to true. Then wire up a handler for the Form KeyUp event and handle the keystrokes there. The data the scanner sends just looks like you pressing the keyboard to Windows so it will pass on the events to your application.
Why my function called multiple times after scanning the barcode through barcode scanner device in angularjs?

Why my function called multiple times after scanning the barcode through barcode scanner device in angularjs?


By : user2111990
Date : March 29 2020, 07:55 AM
I hope this helps you . Directives that add event handlers to external elements need to remove those event handlers when the scope is destroyed:
code :
app.directive('barcodeScanner', function() {
  return {
    restrict: 'A',    
    scope: {
        callback: '=barcodeScanner',        
      },      
    link:  function postLink(scope, iElement, iAttrs){       

       jQuery(document).on("keypress", keypressHandler);
       scope.$on("$destroy", function () {
           jQuery(document).off("keypress", keypressHandler);       
       });


       function keypressHandler(e) {            
            if (chars.length === 0) {
                startTime = new Date().getTime();
            } else {
                endTime = new Date().getTime();
            }
            //...
       }
    }
  }
})
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