Barcode1DReaderDoScan(Int32,Barcode1DReaderScanMode) Method

In This Topic

Starts a barcode recognition process on a specified GdPicture image or on an area of a specified GdPicture image defined by the SetROI method. This method allows you to set the scanning mode parameter according to your preference.

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Overloads Function Barcode1DReaderDoScan( _
   ByVal ImageID As Integer, _
   ByVal ScanMode As Barcode1DReaderScanMode _
) As GdPictureStatus

public GdPictureStatus Barcode1DReaderDoScan( 
   int ImageID,
   Barcode1DReaderScanMode ScanMode
)

public function Barcode1DReaderDoScan( 
    ImageID: Integer;
    ScanMode: Barcode1DReaderScanMode
): GdPictureStatus;

public function Barcode1DReaderDoScan( 
   ImageID : int,
   ScanMode : Barcode1DReaderScanMode
) : GdPictureStatus;

public: GdPictureStatus Barcode1DReaderDoScan( 
   int ImageID,
   Barcode1DReaderScanMode ScanMode
)

public:
GdPictureStatus Barcode1DReaderDoScan( 
   int ImageID,
   Barcode1DReaderScanMode ScanMode
)

Parameters

ImageID: A unique image identifier of the GdPicture image representing the image in use.
ScanMode: A member of the Barcode1DReaderScanMode enumeration. The scan mode (speed or quality) used for scanning process.

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.

Remarks

This method will try to detect all available barcodes. You can use the Barcode1DReaderDoScan(Int32,Barcode1DReaderScanMode,Barcode1DReaderType,Boolean,Int32,Boolean) method and set the ExpectedCount parameter 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.

Example

Finding all 1D barcodes in a given image and saving their information to a file.

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("image.jpg", false);
 
    // Start the barcode scanning process to find all available 1D barcode symbols using the best speed.
    gdpictureImaging.Barcode1DReaderDoScan(imageID, Barcode1DReaderScanMode.BestSpeed);
 
    using (System.IO.StreamWriter file = new System.IO.StreamWriter("barcodes.txt"))
    {
        int barcodesFound = gdpictureImaging.Barcode1DReaderGetBarcodeCount();
        for (int i = 1; i <= barcodesFound; i++)
        {
            file.WriteLine(gdpictureImaging.Barcode1DReaderGetBarcodeValue(i));
        }
    }
 
    // Release used resources.
    gdpictureImaging.Barcode1DReaderClear();
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}

Reference

GdPictureImaging Class
GdPictureImaging Members
Overload List
SetROI Method
GetStat Method
CreateGdPictureImageFromFile(String,Boolean) Method
Barcode1DReaderGetBarcodeCount Method
Barcode1DReaderGetBarcodeValue(Int32) Method
Barcode1DReaderClear Method
ReleaseGdPictureImage Method