private void GenerateSvg(TagHelperOutput output, string content, BarcodeFormat barcodeformat, int width, int height, int margin, string alt)
{
var qrWriter = new ZXing.BarcodeWriterSvg
{
Format = barcodeformat,
Options = new QrCodeEncodingOptions {
Height = height, Width = width, Margin = margin
}
};
var svgImage = qrWriter.Write(content);
output.TagName = "img";
output.Attributes.Clear();
output.Attributes.Add("width", svgImage.Width);
output.Attributes.Add("height", svgImage.Height);
output.Attributes.Add("alt", alt);
output.Attributes.Add("src", new Microsoft.AspNetCore.Html.HtmlString(
String.Format("data:image/svg+xml;{0}", svgImage.Content)));
}
public override void Process(TagHelperContext context, TagHelperOutput output)
{
if (String.IsNullOrEmpty(this.Content))
{
return;
}
var encodingOpts = this.CreateOptions();
var qrWriter = new ZXing.BarcodeWriterSvg
{
Format = this.ConvertBarcodeFormat(this.BarcodeFormat),
Options = encodingOpts,
};
var svgImage = qrWriter.Write(this.Content);
var base64 = Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(svgImage.Content));
var src = $"data:image/svg+xml;base64,{base64}";
output.TagName = "img";
output.Attributes.Clear();
output.Attributes.Add("width", this.Width);
output.Attributes.Add("height", this.Height);
output.Attributes.Add("alt", this.Alt);
output.Attributes.Add("src", src);
}
public static void Main(string[] args)
{
var myIp = GetLocalIPv4(NetworkInterfaceType.Ethernet);
if (string.IsNullOrWhiteSpace(myIp))
{
myIp = GetLocalIPv4(NetworkInterfaceType.Wireless80211);
}
else if (string.IsNullOrWhiteSpace(myIp))
{
myIp = "127.0.0.1";
}
Console.WriteLine(myIp);
var w = new ZXing.BarcodeWriterSvg();
w.Format = BarcodeFormat.QR_CODE;
var image = w.Write($"http://{myIp}:54856");
System.IO.Directory.CreateDirectory(System.IO.Path.Combine(".", "wwwroot", "images"));
System.IO.File.WriteAllText(System.IO.Path.Combine(".", "wwwroot", "images", "barcode.svg"), image.Content);
BuildWebHost(args).Run();
}
