.NET Barcode Scanner SDK

Scan & Read QR Code from Image
CnetSDK .NET Barcode Scanner SDK integrates highly accurate 2D barcode QR Code reader and scanner APIs into a standalone .NET barcode reader component/library dll. This .NET barcode reader component/library dll can be used to scan/decode/read 2D bar code QR Code from multiple image files in .NET, ASP.NET C# and VB.NET programming projects. On this page, .NET, C# & VB..NET programmers will learn how to scan/decode/read QR Code from image files.
.NET QR CODE SCANNER COMPONENT DLL OVERVIEW
CnetSDK .NET barcode scanner library/component dll provides robust .NET 2d barcodes recognition APIs for developers to scan and read QR Code from image files, like reading qr code from Jpeg/Jpg, Png, Bmp, Gif, and Tiff raster image files. Moreover, if you have rotated Jpeg/Jpg, Jpeg/Jpg, Png, Bmp, Gif, and Tiff images and want to read and scan QR Code from image, our .NET QR Code reader library/component dll can help you with this. To be more specific, images with 0, 90, 180, and 270 rotation degrees can be read and decoded by CnetSDK .NET Barcode Scanner & Reader SDK.

Please note, the first data value of each decoded qr code will be a question mark (?) if you are using CnetSDK .NET Barcode Scanner SDK free trial dll for .NET application development. To get full qr scanner and reader features, you are required to order a license of our .NET barcode reader component/library dll.
SCAN & READ QR CODE FROM IMAGE .NET EXAMPLES
CnetSDK QR Code barcode reader library/component dll for .NET, ASP.NET C#/VB.NET allows developers to read and scan QR Code barcode from image files that be the forms of Bitmap object, Stream object, and String.

For different .NET programming requirements, we provide .NET, ASP.NET, C#, VB.NET programmers with suitable QR Code scanning and recognition APIs.  Please see situations as below and choose the suitable 2d barcode QR Code scanning APIs.
  • .NET barcode scanner APIs: read and decode all barcode types from image, including all QR Code
  • .NET barcode scanner APIs: read and decode the only one QR Code barcode from image, with more accuracy
  • .NET barcode scanner APIs: read and decode only one barcode type from image. You may choose QR Code or other 1d and 2d barcode types to read and decode.)

Here, we provide three .NET examples for how to use .NET qr code reader component/library dll in upper situations.
1. Scan/Read QR Code from Image - Read All Barcode Types from Image
 
public void ReadAllBarcodeTypesFromImage(Bitmap bmp)​
       {
              ScanResult[] results = CSBarcodeScanner.ScanBarcode(bmp);
 
              foreach (ScanResult result in results)
              {
                            Console.WriteLine(result.BarcodeType.ToString() + "--" + result.BarcodeData);
              }
 
              Console.ReadKey();
        }
2. Scan/Read QR Code from Image - Read the Only One QR Code from Image
 
public void ReadTheOnlyOneQRCodeFromImage(Bitmap bmp)
       {
                ScanResult result = CSBarcodeScanner.ScanOnlyBarcode(bmp);
                   Console.WriteLine(result.BarcodeType.ToString() + "--" + result.BarcodeData);
                   Console.ReadKey();
        }
3. Scan/Read QR Code from Image - Read QR Code Barcode  Type Only

public void ReadQRCodeBarcodeTypeOnly(Bitmap bmp)
       {
               ScanResult[] results = CSBarcodeScanner.ScanBarcode(bmp, CSBarcodeType.QRCode);
               foreach (ScanResult result in results)
               {
                             Console.WriteLine(result.BarcodeType.ToString() + "-" + result.BarcodeData);
               }
 
               Console.ReadKey();
        }
ALL SUPPORTED 2D & 1D BARCODES

Read QR Code from Image

Read Data Matrix from Image

Read PDF-417 from Image

Read Aztec Code from Image

Read EAN-13 from Image

Read EAN-8 from Image

Read UPC-A from Image

Read UPC-E from Image

Read Code 128 from Image

Read Code 39 from Image

Read Code 93 from Image

Read Codabar from Image

Read ITF-14 from Image

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