GdPicture14 Namespace / GdPictureImaging Class / BarcodeDataMatrixReaderDoScan Method / BarcodeDataMatrixReaderDoScan(Int32) Method
A unique image identifier of the GdPicture image representing the image in use.

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BarcodeDataMatrixReaderDoScan(Int32) Method
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Starts a barcode recognition process on a specified GdPicture image or on an area of a specified GdPicture image defined by the GdPictureImaging.SetROI method.
Public Overloads Function BarcodeDataMatrixReaderDoScan( _
   ByVal ImageID As Integer _
) As GdPictureStatus
public GdPictureStatus BarcodeDataMatrixReaderDoScan( 
   int ImageID
public function BarcodeDataMatrixReaderDoScan( 
    ImageID: Integer
): GdPictureStatus; 
public function BarcodeDataMatrixReaderDoScan( 
   ImageID : int
) : GdPictureStatus;
public: GdPictureStatus BarcodeDataMatrixReaderDoScan( 
   int ImageID
GdPictureStatus BarcodeDataMatrixReaderDoScan( 
   int ImageID


A unique image identifier of the GdPicture image representing the image in use.

Return Value

A member of the GdPictureStatus enumeration. If the method has been successfully followed, then the return value is GdPictureStatus.OK. We strongly recommend always checking this status first.
This method uses the best quality mode for scanning and will try to detect all available barcodes. You can use the GdPictureImaging.BarcodeDataMatrixReaderDoScan method and set the ExpectedCount to 1 and StopOnExpectedCount to true, to stop the recognition process after the first barcode was found.

For more details, please refer to our Barcode Recognition Sample included in the installation folder that demonstrates the usage of this method.

Finding DataMatrix barcodes in an image and writes complete barcodes info into a file.
using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("image.jpg", false);
    // Start the DataMatrix barcode scanning process using the best quality mode and look for all barcodes.
    // Write all available info into a text file.
    using (System.IO.StreamWriter file = new System.IO.StreamWriter("DataMatrix.txt"))
        int barcodesFound = gdpictureImaging.BarcodeDataMatrixReaderGetBarcodeCount();
        for (int i = 1; i <= barcodesFound; i++)
            // Decoded information.
            file.WriteLine("Decoded info = " + gdpictureImaging.BarcodeDataMatrixReaderGetBarcodeValue(i));
            // The skew angle of the barcode, in degrees.
            file.WriteLine("Skew angle = " + gdpictureImaging.BarcodeDataMatrixReaderGetBarcodeSkewAngle(i));
            // The number of rows of the barcode.
            file.WriteLine("Rows = " + gdpictureImaging.BarcodeDataMatrixReaderGetBarcodeRows(i));
            // The number of columns of the barcode.
            file.WriteLine("Columns = " + gdpictureImaging.BarcodeDataMatrixReaderGetBarcodeColumns(i));
            // The raw bytes decoded. It was post-processed to find the correct decoded info based on detected Encoding.
            file.WriteLine("Raw bytes = " + gdpictureImaging.BarcodeDataMatrixReaderGetBarcodeValueRAW(i));
            // The barcode position, given by the coordinates of the corners.
            file.WriteLine("Position =  Top-Left=["
                + gdpictureImaging.BarcodeDataMatrixReaderGetBarcodeX1(i) + ", " + gdpictureImaging.BarcodeDataMatrixReaderGetBarcodeY1(i)
                + "] Top-Right=[" + gdpictureImaging.BarcodeDataMatrixReaderGetBarcodeX2(i) + ", " + gdpictureImaging.BarcodeDataMatrixReaderGetBarcodeY2(i)
                + "] Bottom-Right=[" + gdpictureImaging.BarcodeDataMatrixReaderGetBarcodeX3(i) + ", " + gdpictureImaging.BarcodeDataMatrixReaderGetBarcodeY3(i)
                + "] Bottom-Left=[" + gdpictureImaging.BarcodeDataMatrixReaderGetBarcodeX4(i) + ", " + gdpictureImaging.BarcodeDataMatrixReaderGetBarcodeY4(i) + "]");
    // Release used resources.
See Also