C # string generated according to the two-dimensional code

1. First download NuGet package (ZXing.Net)

2. Create a new controller and write code behind

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();
        }
        /// <summary>
        /// generating method of two-dimensional code
         ///  </ Summary> 
        ///  <param name = "text"> input string </ param> 
        ///  <param name = "width"> two-dimensional code width < / param> 
        ///  <param name = "height"> two-dimensional code height </ param> 
        ///  <Returns> </ Returns> 
        public  String QRcode ( String text, String width, String height) 
        { 
            String the Response = " " ;
            try
            {
                BarcodeWriter writer = new BarcodeWriter();
                writer.Format = BarcodeFormat.QR_CODE; 
                QrCodeEncodingOptions Options = new new QrCodeEncodingOptions (); 
                options.DisableECI = to true ;
                 // set the content encoding 
                options.CharacterSet = " UTF-. 8 " ;
                 // the width and height values assigned to the transmitted two-dimensional code 
                = options.Width Convert.ToInt32 (width); 
                options.Height = Convert.ToInt32 (height);
                 // set two-dimensional code margin, the pixel unit is not fixed 
                options.Margin = . 1  ;
                writer.Options = Options; 

                Bitmap the Map = writer.Write (text);
                 String DI = text + DateTime.Now.ToString ( " yyyyMMddHHmmss " ) + " .png " ;
                 // two-dimensional code will be displayed on the desktop (you also want to displayed on the desktop, then change it to the path) 
                String path Path.Combine = ( " C: \\ \\ zhulin the Users \\ Desktop " , DI); 
                map.Save (path, ImageFormat.Png); 
                map.Dispose () ; 
                the Response = " two-dimensional code generating success! " ; 
            }
            the catch  (Exception) 
            {
                the Response = " two-dimensional code generation failed! " ; 
            } 
            return the Response; 
        } 
    } 
}

3. The front end

@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
    <link href="~/Scripts/bootstrap-3.3.7-dist/css/bootstrap.min.css" rel="stylesheet" />
    <script src="~/Scripts/jquery-3.3.1.min.js"></script>
    <script src="~/Scripts/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            $("#btn").click(function () {
                var w = $("#wd").val();
                var h = $("#hg").val();
                var text = $("#tx").val();
                $.ajax({
                    url: "/Str/QRcode",
                    data: "text=" + text + "&width=" + w + "&height=" + h,
                    success: function (e) {
                        alert(e);
                    }
                });
            });
        })

    </script>
</head>
<body>

    <div style="margin-top:20px;margin-left:20px;">
        <p>高度:<input type="text" style="width:60px;height:32px;border:1px solid #66b1ff;margin-left:3px;" id="wd" /><span style="margin-left:10px;">宽度:</span><input type="text" style="width:60px;height:32px;border:1px solid #66b1ff;margin-left:3px;" id="hg" /></p>
        <input type="text" style="width:200px;height:32px;border:1px solid #66b1ff;" id="tx" placeholder="请输入字符串..." /><button type="button" class="btn btn-info" id="btn" style="margin-left:5px;margin-top:-1px;height:33px;">提交</button>
    </div>
</body>
</html>

4. Effects:

C # string generated according to the two-dimensional code

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