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145 lines
4.4 KiB
Plaintext
145 lines
4.4 KiB
Plaintext
using QRCoder;
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace BP.Cloud
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{
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/// <summary>
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/// 二维码帮助类
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/// </summary>
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public class QRCodeHelper
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{
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/// <summary>
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/// 生成二维码图片
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static Bitmap CreateQRimg(string str)
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{
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QRCodeGenerator qrGenerator = new QRCodeGenerator();
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QRCodeData qrCodeData = qrGenerator.CreateQrCode(str, QRCodeGenerator.ECCLevel.Q);
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QRCoder.QRCode qrCode = new QRCoder.QRCode(qrCodeData);
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Bitmap bt = qrCode.GetGraphic(20);
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return bt;
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}
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/// <summary>
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/// 生成二维码图片流（二维码上含文字）
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/// </summary>
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/// <param name="str1">二维码中要传递的数据（地址）</param>
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/// <param name="str2">二维码上显示的文字说明</param>
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public static byte[] GenerateQRCode(string str1, string str2)
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{
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using (Image codeImage = CreateQRimg(str1), strImage = ConvertStringToImage(str2))
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{
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Image img = CombineImage(600, 600, codeImage, 60, 50, strImage, 0, 530);
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using (var stream = new MemoryStream())
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{
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img.Save(stream, ImageFormat.Jpeg);
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//输出图片流
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return stream.ToArray();
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}
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}
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}
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/// <summary>
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/// 生成二维码图片流（不含文字）
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/// </summary>
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/// <param name="str">二维码中要传递的数据（地址）</param>
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/// <returns></returns>
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public static byte[] GenerateQRCode(string str)
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{
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using (Image codeImage = CreateQRimg(str))
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{
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using (var stream = new MemoryStream())
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{
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codeImage.Save(stream, ImageFormat.Jpeg);
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return stream.ToArray();
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}
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}
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}
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/// <summary>
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/// 生成文字图片
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static Image ConvertStringToImage(string str)
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{
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Bitmap image = new Bitmap(600, 40, PixelFormat.Format24bppRgb);
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Graphics g = Graphics.FromImage(image);
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try
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{
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Font font = new Font("SimHei", 14, FontStyle.Regular);
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g.Clear(Color.White);
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StringFormat format = new StringFormat();
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format.Alignment = StringAlignment.Center;
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format.LineAlignment = StringAlignment.Center;
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Rectangle rectangle = new Rectangle(0, 0, 600, 40);
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g.DrawString(str, font, new SolidBrush(Color.Black), rectangle, format);
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return image;
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}
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catch (Exception e)
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{
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throw e;
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}
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finally
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{
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GC.Collect();
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}
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}
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/// <summary>
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/// 在画板中合并二维码图片和文字图片
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/// </summary>
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/// <param name="width"></param>
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/// <param name="height"></param>
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/// <param name="imgLeft"></param>
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/// <param name="imgLeft_left"></param>
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/// <param name="imgLeft_top"></param>
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/// <param name="imgRight"></param>
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/// <param name="imgRight_left"></param>
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/// <param name="imgRight_top"></param>
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/// <returns></returns>
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public static Image CombineImage(int width, int height, Image imgLeft, int imgLeft_left, int imgLeft_top, Image imgRight, int imgRight_left, int imgRight_top)
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{
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Bitmap image = new Bitmap(width, height, PixelFormat.Format24bppRgb);
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Graphics g = Graphics.FromImage(image);
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try
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{
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g.Clear(Color.White);
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g.DrawImage(imgLeft, imgLeft_left, imgLeft_top, 500, 500);
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g.DrawImage(imgRight, imgRight_left, imgRight_top, imgRight.Width, imgRight.Height);
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return image;
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}
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catch (Exception e)
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{
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throw e;
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}
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finally
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{
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g.Dispose();
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}
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}
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}
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} |