GdPicture.NET.14
GdPicture14 Namespace / GdPictureImaging Class / BarcodePDF417ReaderGetBarcodeColumns Method
Barcode index. Must be between 1 and BarcodePDF417ReaderGetBarcodeCount returned value.
Example





In This Topic
BarcodePDF417ReaderGetBarcodeColumns Method (GdPictureImaging)
In This Topic
Returns the number of columns of a barcode detected by the BarcodePDF417ReaderDoScan method.
Syntax
'Declaration
 
Public Function BarcodePDF417ReaderGetBarcodeColumns( _
   ByVal BarcodeNo As Integer _
) As Integer
public int BarcodePDF417ReaderGetBarcodeColumns( 
   int BarcodeNo
)
public function BarcodePDF417ReaderGetBarcodeColumns( 
    BarcodeNo: Integer
): Integer; 
public function BarcodePDF417ReaderGetBarcodeColumns( 
   BarcodeNo : int
) : int;
public: int BarcodePDF417ReaderGetBarcodeColumns( 
   int BarcodeNo
) 
public:
int BarcodePDF417ReaderGetBarcodeColumns( 
   int BarcodeNo
) 

Parameters

BarcodeNo
Barcode index. Must be between 1 and BarcodePDF417ReaderGetBarcodeCount returned value.

Return Value

The number of columns of the barcode.
Remarks

This method is used in the "Barcode Recognition" Demo.

Example
Finding PDF417 barcodes in an image and writing complete barcodes info into a file.
using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("image.jpg", false);
 
    // Set to 0, so all the PDF417 barcodes in the image should be found.
    int expectedBarcodes = 0;
 
    // Perform scanning at best speed, ignoring very damaged barcodes.
    BarcodePDF417ReaderScanMode mode = BarcodePDF417ReaderScanMode.BestSpeed;
 
    // Start the PDF417 barcode scanning process and write info into a text file.
    gdpictureImaging.BarcodePDF417ReaderDoScan(imageID, mode, expectedBarcodes);
 
    using (System.IO.StreamWriter file = new System.IO.StreamWriter("PDF417.txt"))
    {
        int barcodesFound = gdpictureImaging.BarcodePDF417ReaderGetBarcodeCount();
 
        for (int i = 1; i <= barcodesFound; i++)
        {
            // Decoded information.
            file.WriteLine("Decoded info = " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeValue(i));
 
            // The raw bytes decoded. It was post-processed to find the correct decoded info based on detected Encoding.
            file.WriteLine("Raw bytes = " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeValueRAW(i));
 
            // The number of rows of the barcode.
            file.WriteLine("Rows = " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeRows(i));
 
            // The number of columns of the barcode.
            file.WriteLine("Columns = " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeColumns(i));
 
            // The skew angle of the barcode, in degrees.
            file.WriteLine("Skew angle = " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeSkewAngle(i));
 
            // Confidence in result, in percentage (values from 0 to 100).
            file.WriteLine("Confidence = " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeConfidence(i));
 
            // The barcode position, given by the coordinates of the corners.
            file.WriteLine("Position =  Top-Left=["
                + gdpictureImaging.BarcodePDF417ReaderGetBarcodeX1(i) + ", " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeY1(i)
                + "] Top-Right=[" + gdpictureImaging.BarcodePDF417ReaderGetBarcodeX2(i) + ", " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeY2(i)
                + "] Bottom-Right=[" + gdpictureImaging.BarcodePDF417ReaderGetBarcodeX3(i) + ", " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeY3(i)
                + "] Bottom-Left=[" + gdpictureImaging.BarcodePDF417ReaderGetBarcodeX4(i) + ", " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeY4(i) + "]");
        }
    }
 
    // Release used resources.
    gdpictureImaging.BarcodePDF417ReaderClear();
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}
See Also