C# 根据字符串生成二维码的实例代码

1.先下载NuGet包(ZXing.Net)

2.新建控制器及编写后台代码

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using ZXing;
using ZXing.QrCode;

namespace WebApplication1.Controllers
{
  public class StrController : Controller
  {
    // GET: Str
    public ActionResult Index()
    {
      return View();
    }
    /// 

    /// 生成二维码方法
    /// 
    /// 输入的字符串
    /// 二维码宽度
    /// 二维码高度
    /// 
    public string QRcode(string text, string width, string height)
    {
      string Response = "";
      try
      {
 BarcodeWriter writer = new BarcodeWriter();
 writer.Format = BarcodeFormat.QR_CODE;
 QrCodeEncodingOptions options = new QrCodeEncodingOptions();
 options.DisableECI = true;
 //设置内容编码
 options.CharacterSet = "UTF-8";
 //将传来的值赋给二维码的宽度和高度
 options.Width = Convert.ToInt32(width);
 options.Height = Convert.ToInt32(height);
 //设置二维码的边距,单位不是固定像素
 options.Margin = 1;
 writer.Options = options;

 Bitmap map = writer.Write(text);
 string di = text + DateTime.Now.ToString("yyyyMMddHHmmss") + ".png";
 //二维码会显示在桌面(你也想显示在桌面的话,要改一下路径)
 string path = Path.Combine("C:\Users\zhulin\Desktop", di);
 map.Save(path, ImageFormat.Png);
 map.Dispose();
 Response = "二维码生成成功！";
      }
      catch (Exception)
      {
 Response = "二维码生成失败！";
      }
      return Response;
    }
  }
}

3.前端

@{
  Layout = null;
}





  
  
  
  
  
  



  
    
高度:宽度:
    提交
  

4.效果：

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