DecodeBitmapRect Method

Description

Reads barcode from a specified area on an image in buffer.

Syntax

public BarcodeResult[] DecodeBitmapRect(Bitmap bitmap, Rectangle rect);

Parameters

bitmap

An image loaded in the physical memory (application buffer).

rect

The specified area on the file which is a rectangle.

Return Value

All barcodes have been read. If no barcodes are read, null is returned.

Example

ReaderOptions option = new ReaderOptions();
option.BarcodeFormats = (
    BarcodeFormat.OneD | 
    BarcodeFormat.QR_CODE | 
    BarcodeFormat.PDF417 | 
    BarcodeFormat.DATAMATRIX
);
option.MaxBarcodesToReadPerPage = 1;
BarcodeReader reader = new BarcodeReader();
reader.ReaderOptions = option;
try
{
    Bitmap bBMP = new Bitmap("C:\\test.bmp");
    BarcodeResult[] results = reader.DecodeBitmapRect(bBMP, rect);
    for(int i = 0; i < results.Length; ++i)
    {
        BarcodeResult barcode = results[i];
        Console.WriteLine("{0}: {1}", i, barcode.BarcodeText);
    }
}
catch(BarcodeReaderException exp)
{
    Console.WriteLine("Error: {0}, {1}", exp.Code.ToString(), exp.Message);
}

See Also

.NET > Classes > BarcodeReader > DecodeBitmap
.NET > Classes > ReaderOptions > BarcodeFormats
.NET > Classes > ReaderOptions > MaxBarcodesToReadPerPage
.NET > Classes > BarcodeReaderException
.NET > Enumeration > BarcodeFormat
.NET > Enumeration > ErrorCode