.net7二维码跨平台完美解决方案

前言

随着.net不断的发展，跨平台已经成为日常，之前在图片处理使用的bitmap已经不具备跨平台的能力
那么我们之前基于bitmap使用的验证码，二维码等将受到影响，下面小编为大家带来.net7二维码跨平台完美解决方案

工具的使用

安装包：SkiaSharp.QrCode（MIT协议），ZXing.Net（Apache-2.0协议）
直接用nuget下载即可

普通二维码生成

仅需要SkiaSharp.QrCode，

    public static byte[] CreateQRCode(string content, int width, int hight){using var generator = new QRCodeGenerator();var qr = generator.CreateQrCode(content, ECCLevel.H);var info = new SKImageInfo(width, hight);using var surface = SKSurface.Create(info);var canvas = surface.Canvas;canvas.Render(qr, info.Width, info.Height);using var image = surface.Snapshot();using var data = image.Encode(SKEncodedImageFormat.Png, 100);return data.ToArray();}

webapi使用

小编的代码封装了一下，应该也很好理解,后面两个方法是小编单独封装的方便复用

    /// <summary>///  Get ordinary QR code /// </summary>/// <returns>File</returns>public IActionResult GetQRCode(string content, int width, int hight)=> FileSuccee(BarcodeHelper.CreateQRCode(content, width, hight), "png");public static IActionResult FileSuccee(byte[] bytes, string suffixContentType) => new FileContentResult(bytes, suffixContentType.FindContentTypeBySuffix());public static string FindContentTypeBySuffix(this string suffix)=> suffix switch{"jpg" => "image/jpeg","tiff" => "image/tiff","gif" => "image/gif","jfif" => "image/jpeg","png" => "image/png","tif" => "image/tiff","ico" => "image/x-icon","jpeg" => "image/jpeg","wbmp" => "image/vnd.wap.wbmp","fax" => "image/fax","net" => "image/pnetvue","jpe" => "image/jpeg","rp" => "image/vnd.rn-realpix",_ => throw new Exception("没有这个文件格式")};

带图片的二维码生成

相对来说还是需要一点基础，好在小编已经帮大家踩了，无脑复制就可以用了

using SkiaSharp.QrCode;
using SkiaSharp;
using System.Text;namespace Blog.Fu.Common.Helper.MyBarcode;
public class BarcodeHelper
{public class QRCodeConfig{public string Text { get; set; } = default!;public int Width { get; set; }public int Height { get; set; }public byte[]? LogoImgae { get; set; }public int KeepWhiteBorderPixelVal { get; set; } = -1;public string BackgroundColor { get; set; } = "ffffff";public string CodeColor { get; set; } = "000000";}public static byte[] CreateQRCode(string content, int width, int hight){using var generator = new QRCodeGenerator();var qr = generator.CreateQrCode(content, ECCLevel.H);var info = new SKImageInfo(width, hight);using var surface = SKSurface.Create(info);var canvas = surface.Canvas;canvas.Render(qr, info.Width, info.Height);using var image = surface.Snapshot();using var data = image.Encode(SKEncodedImageFormat.Png, 100);return data.ToArray();}/// <summary>/// Qr code generation/// </summary>/// <param name="qRCodeConfig"></param>/// <returns></returns>/// <exception cref="ArgumentNullException">qRCodeConfig.Text not null</exception>public static byte[] CreateLogoQRCode(QRCodeConfig qRCodeConfig){qRCodeConfig.Text = qRCodeConfig.Text ?? throw new ArgumentNullException(nameof(qRCodeConfig));var keepWhiteBorderPixelVal = qRCodeConfig.KeepWhiteBorderPixelVal is >= -1 and < 10 ? qRCodeConfig.KeepWhiteBorderPixelVal : -1;var width = qRCodeConfig.Width is > 100 and < 1200 ? qRCodeConfig.Width : 500;var height = qRCodeConfig.Height is > 100 and < 1200 ? qRCodeConfig.Height : 500; ;Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);var qRCodeWriter = new ZXing.QrCode.QRCodeWriter();var hints = new Dictionary<ZXing.EncodeHintType, object>{{ ZXing.EncodeHintType.CHARACTER_SET, "UTF-8" },{ ZXing.EncodeHintType.QR_VERSION, 8 },{ ZXing.EncodeHintType.ERROR_CORRECTION, ZXing.QrCode.Internal.ErrorCorrectionLevel.H }};var bitMatrix = qRCodeWriter.encode(qRCodeConfig.Text, ZXing.BarcodeFormat.QR_CODE, width, height, hints);var w = bitMatrix.Width;var h = bitMatrix.Height;var sKBitmap = new SKBitmap(w, h);var blackStartPointX = 0;var blackStartPointY = 0;var blackEndPointX = w;var blackEndPointY = h;using var sKCanvas = new SKCanvas(sKBitmap);var sKColorBlack = SKColor.Parse(qRCodeConfig.CodeColor);var sKColorWihte = SKColor.Parse(qRCodeConfig.BackgroundColor);sKCanvas.Clear(sKColorWihte);var blackStartPointIsNotWriteDown = true;for (var y = 0; y < h; y++){for (var x = 0; x < w; x++){var flag = bitMatrix[x, y];if (flag){if (blackStartPointIsNotWriteDown){blackStartPointX = x;blackStartPointY = y;blackStartPointIsNotWriteDown = false;}blackEndPointX = x;blackEndPointY = y;sKCanvas.DrawPoint(x, y, sKColorBlack);}else{sKCanvas.DrawPoint(x, y, sKColorWihte);}}}var qrcodeRealWidth = blackEndPointX - blackStartPointX;var qrcodeRealHeight = blackEndPointY - blackStartPointY;if (keepWhiteBorderPixelVal > -1){var borderMaxWidth = (int)Math.Floor((double)qrcodeRealWidth / 10);if (keepWhiteBorderPixelVal > borderMaxWidth){keepWhiteBorderPixelVal = borderMaxWidth;}var nQrcodeRealWidth = width - keepWhiteBorderPixelVal - keepWhiteBorderPixelVal;var nQrcodeRealHeight = height - keepWhiteBorderPixelVal - keepWhiteBorderPixelVal;var sKBitmap2 = new SKBitmap(width, height);var sKCanvas2 = new SKCanvas(sKBitmap2);sKCanvas2.Clear(sKColorWihte);sKCanvas2.DrawBitmap(sKBitmap,new SKRect{Location = new SKPoint { X = blackStartPointX, Y = blackStartPointY },Size = new SKSize { Height = qrcodeRealHeight, Width = qrcodeRealWidth }},new SKRect{Location = new SKPoint { X = keepWhiteBorderPixelVal, Y = keepWhiteBorderPixelVal },Size = new SKSize { Width = nQrcodeRealWidth, Height = nQrcodeRealHeight }});blackStartPointX = keepWhiteBorderPixelVal;blackStartPointY = keepWhiteBorderPixelVal;qrcodeRealWidth = nQrcodeRealWidth;qrcodeRealHeight = nQrcodeRealHeight;sKCanvas2.Dispose();sKBitmap.Dispose();sKBitmap = sKBitmap2;}if (qRCodeConfig is { LogoImgae.Length: > 0 }){using SKBitmap sKBitmapLogo = SKBitmap.Decode(qRCodeConfig.LogoImgae);if (!sKBitmapLogo.IsEmpty){using var sKPaint2 = new SKPaint{FilterQuality = SKFilterQuality.None,IsAntialias = true};var logoTargetMaxWidth = (int)Math.Floor((double)qrcodeRealWidth / 6);var logoTargetMaxHeight = (int)Math.Floor((double)qrcodeRealHeight / 6);var qrcodeCenterX = (int)Math.Floor((double)qrcodeRealWidth / 2);var qrcodeCenterY = (int)Math.Floor((double)qrcodeRealHeight / 2);var logoResultWidth = sKBitmapLogo.Width;var logoResultHeight = sKBitmapLogo.Height;if (logoResultWidth > logoTargetMaxWidth){var r = (double)logoTargetMaxWidth / logoResultWidth;logoResultWidth = logoTargetMaxWidth;logoResultHeight = (int)Math.Floor(logoResultHeight * r);}if (logoResultHeight > logoTargetMaxHeight){var r = (double)logoTargetMaxHeight / logoResultHeight;logoResultHeight = logoTargetMaxHeight;logoResultWidth = (int)Math.Floor(logoResultWidth * r);}var pointX = qrcodeCenterX - (int)Math.Floor((double)logoResultWidth / 2) + blackStartPointX;var pointY = qrcodeCenterY - (int)Math.Floor((double)logoResultHeight / 2) + blackStartPointY;using var sKCanvas3 = new SKCanvas(sKBitmap);using var sKPaint = new SKPaint{FilterQuality = SKFilterQuality.Medium,IsAntialias = true};sKCanvas3.DrawBitmap(sKBitmapLogo,new SKRect{Location = new SKPoint { X = 0, Y = 0 },Size = new SKSize { Height = sKBitmapLogo.Height, Width = sKBitmapLogo.Width }},new SKRect{Location = new SKPoint { X = pointX, Y = pointY },Size = new SKSize { Height = logoResultHeight, Width = logoResultWidth }}, sKPaint);}}using SKImage sKImage = SKImage.FromBitmap(sKBitmap);sKBitmap.Dispose();using var data = sKImage.Encode(SKEncodedImageFormat.Png, 100);return data.ToArray();}
}

webapi案例带图片的二维码

和上面一样后面方法小编封装在其他地方方便复用

    /// <summary>///  Get with the logo QR code/// </summary>/// <returns>File</returns>public IActionResult PostLogoGetQRCode(string content, int width, int hight, IFormFile file)=> FileSuccee(BarcodeHelper.CreateLogoQRCode(new BarcodeHelper.QRCodeConfig{Text = content,Width = width,Height = hight,LogoImgae = file.FileToBytes()}), "png");/// <summary>///  File to binary/// </summary>/// <returns>byte[]</returns>public static byte[] FileToBytes(this IFormFile fileData){byte[] data;using var inputStream = fileData.OpenReadStream();if (inputStream is not MemoryStream memoryStream){memoryStream = new MemoryStream();inputStream.CopyTo(memoryStream);}data = memoryStream.ToArray();return data;}

借鉴文章

https://www.cnblogs.com/ruzi/p/10140754.html
小编有抄袭别人的代码但是有些瑕疵，已被小编完善

效果图

结尾

喜欢的宝子记得点赞，关注，小编也会持续更新

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