条形码网页扫描器

VBC#

using IronBarCode;

public string ReadBarCode(CamImage imageData)
{
        // Decode the base64 image data
        var splitObject = imageData.imageDataBase64.Split(',');
        byte[] imagebyteData = Convert.FromBase64String((splitObject.Length > 1) ? splitObject[1] : splitObject[0]);

        using (var ms = new MemoryStream(imagebyteData))
        {
            // Convert byte array to Image
            Image barcodeImage = Image.FromStream(ms);

            // Read barcode from Image
            var results = BarcodeReader.Read(barcodeImage);

	        // Read first value from barcode
            return $"{DateTime.Now}: Barcode is ({results[0].Value})";
        }

}

Imports IronBarCode

Public Function ReadBarCode(imageData As CamImage) As String
    ' Decode the base64 image data
    Dim splitObject = imageData.imageDataBase64.Split(","c)
    Dim imagebyteData As Byte() = Convert.FromBase64String(If(splitObject.Length > 1, splitObject(1), splitObject(0)))

    Using ms As New MemoryStream(imagebyteData)
        ' Convert byte array to Image
        Dim barcodeImage As Image = Image.FromStream(ms)

        ' Read barcode from Image
        Dim results = BarcodeReader.Read(barcodeImage)

        ' Read first value from barcode
        Return $"{DateTime.Now}: Barcode is ({results(0).Value})"
    End Using

End Function

PM > Install-Package BarCode

Install-Package BarCode

条形码网页扫描器

从网络来源扫描条码通常需要将图像数据作为文本字符串处理，而不是物理文件。这种方法的主要优点是允许您的应用程序直接处理用户上传的图像或网络摄像头的图像，而无需首先将它们保存到磁盘。

在此代码示例中，我们将演示主要代码片段，展示如何将Base64字符串转换回图像，并在与如Blazor等网络平台集成时使用IronBarcode对其进行数据扫描。

5步指南，设置IronBarcode网络扫描器

byte[] imagebyteData = Convert.FromBase64String((splitObject.Length > 1) ? splitObject[1] : splitObject[0]);
using (var ms = new MemoryStream(imagebyteData))
Image barcodeImage = Image.FromStream(ms);
var results = BarcodeReader.Read(barcodeImage);
return $"{DateTime.Now}: Barcode is ({results[0].Value})";