asp.net 动态生成二维码加文字描述或者二维码加logo

1.添加nuget包管理中的引用 ZXing.Net或QrCode.Net或ThoughtWorks.QRCode

2.前台页面 AssetsListNew.aspx

//监听行工具条table.on('tool(demo)', function (obj) {var data = obj.data;if (obj.event === 'make') {location.href = "AssetsListNew.aspx?action=make&id=" + data.id + "";//alert("可以生成" + data.id + "的二维码")//make(table, obj.data.id);//layer.msg('ID：' + data.id + ' 的查看操作');} else if (obj.event === 'del') {del(table, obj.data.id);}else if (obj.event === 'edit') {location.href = "AssetsListNewAdd.aspx?action=edit&id=" + data.id + "";//EditData1('auto', "id", "修改", "PAManager/AssetsAdd.aspx?action=edit&id=" + data.id + "", '75%', '80%');//EditData1('auto', "id", "修改", "../DiBaoGuanLi/60_Add.aspx?idcard=" + data.idcard + "", '75%', '80%');}});

3.后台Common工具类CreateORCode.cs

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ZXing;
using ZXing.QrCode;
using ZXing.QrCode.Internal;namespace Common
{public class CreateORCode{public static Bitmap GenerateQrCode(string text, int w, int h, string desc = ""){BarcodeWriter writer = new BarcodeWriter();writer.Format = BarcodeFormat.QR_CODE;QrCodeEncodingOptions options = new QrCodeEncodingOptions(){DisableECI = true,//设置内容编码CharacterSet = "UTF-8",  //设置二维码的宽度和高度Width = w,Height = h,Margin = 1//设置二维码的边距,单位不是固定像素};writer.Options = options;Bitmap map = writer.Write(text);if (!string.IsNullOrWhiteSpace(desc)){return AddText(desc, map, w, h);}return map;}public static Bitmap GenerateQrCodeWithLogo(string text, int w, int h, string logoUrl, string desc = ""){Bitmap logo = new Bitmap(logoUrl);//构造二维码写码器MultiFormatWriter writer = new MultiFormatWriter();Dictionary<EncodeHintType, object> hint = new Dictionary<EncodeHintType, object>();hint.Add(EncodeHintType.CHARACTER_SET, "UTF-8");hint.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);hint.Add(EncodeHintType.MARGIN, 1);//生成二维码 var bm = writer.encode(text, BarcodeFormat.QR_CODE, w, h, hint);BarcodeWriter barcodeWriter = new BarcodeWriter();Bitmap map = barcodeWriter.Write(bm);//获取二维码实际尺寸（去掉二维码两边空白后的实际尺寸）int[] rectangle = bm.getEnclosingRectangle();//计算插入图片的大小和位置int middleW = Math.Min((int)(rectangle[2] / 3), logo.Width);int middleH = Math.Min((int)(rectangle[3] / 3), logo.Height);int middleL = (map.Width - middleW) / 2;int middleT = (map.Height - middleH) / 2;Bitmap bmpimg = new Bitmap(map.Width, map.Height, PixelFormat.Format32bppArgb);using (Graphics g = Graphics.FromImage(bmpimg)){g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;g.DrawImage(map, 0, 0, w, h);//白底将二维码插入图片g.FillRectangle(Brushes.White, middleL, middleT, middleW, middleH);g.DrawImage(logo, middleL, middleT, middleW, middleH);}if (!string.IsNullOrWhiteSpace(desc)){return AddText(desc, map, w, h);}return bmpimg;}private static Bitmap AddText(string desc, Bitmap qrBitMap, int width, int height){var txtHeight = 30;  // 默认一行文字Font font = new Font("GB2312", 11, FontStyle.Regular);//设置字体，大小SolidBrush sbrush = new SolidBrush(Color.Black); // 设置颜色var newMap = new Bitmap(width, height + txtHeight);Graphics g = Graphics.FromImage(newMap);g.Clear(Color.White);var format = StringFormat.GenericDefault;format.LineAlignment = StringAlignment.Center;format.Alignment = StringAlignment.Center;g.DrawString(desc, font, sbrush, new RectangleF(0, height, width, txtHeight), format);// 合并位图g.DrawImage(qrBitMap, new Rectangle(0, 0, width, height));g.Dispose();return newMap;}/// <summary>/// 解码二维码/// </summary>/// <param name="barcodeBitmap">待解码的二维码图片</param>/// <returns>扫码结果</returns>public static string DecodeQrCode(Bitmap barcodeBitmap){BarcodeReader reader = new BarcodeReader();reader.Options.CharacterSet = "UTF-8";var result = reader.Decode(barcodeBitmap);return (result == null) ? null : result.Text;}}
}

4.前台页面的后台代码调用AssetsListNew.aspx.cs

using Common;
using DAL;
using DQPA.BLL;
using DQPA.IBLL;
using DQPA.MODEL;
using Gma.QrCodeNet.Encoding;
using Gma.QrCodeNet.Encoding.Windows.Render;
using Maticsoft.DBUtility;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace DQPA.PAManager
{public partial class AssetsListNew : System.Web.UI.Page{protected void Page_Load(object sender, EventArgs e){Auxiliary aux = new Auxiliary();if (Session["UId"] == null || string.IsNullOrEmpty(Server.UrlDecode(Session["UId"].ToString()))){Response.Redirect("UserLogin.aspx");return;}if (!IsPostBack){var action = Request.QueryString["action"];var id = Request.QueryString["id"];switch (action){case "list":loadAssets();break;case "delete":DelAssets();break;case "upload"://var fileup = test8.PostedFile;//Upload(fileup);break;case "make":MakeORCode(id);break;case "down":DownloadOperation();break;default:break;}}//var a = hidSearch.Value;//var b = txtCondition.Value;//var download = Request.QueryString["down"];//if (download != null)//{//    var downtype = download.ToString();//    switch (downtype)//    {//        case "1"://            DownloadOperation();//            break;//        default://            break;//    }//}}protected void loadAssets(){try{//DataTable dt = new DataTable();int count;StringBuilder strwhere = new StringBuilder();IAssetsBll assetsBll = new AssetsBll();strwhere.Append(" 1=1");//and ylyid in (select id from M_yanglaoyuan where type ='" + type + "') strwhere.Append(" and ISNULL(IsDelete,0) <> 1 ");//if (!string.IsNullOrEmpty(txtCondition.Value))//{//    where.Append(" and Number like '%" + txtCondition.Value + "%' or type like '%" + txtCondition.Value + "%' or brand  like '%" + txtCondition.Value + "%' ");//}var searchC = Request.QueryString["selectc"];var txtsearch = Request.QueryString["txtselect"];var startTime = Request.QueryString["start"];var endTime = Request.QueryString["end"];if (searchC != null && !string.IsNullOrEmpty(searchC)){if (txtsearch != null && !string.IsNullOrEmpty(txtsearch)){var whereSearch = string.Format(@" and {0} like '%" + txtsearch + "%'", searchC);strwhere.Append(whereSearch);}}if (!string.IsNullOrEmpty(startTime)){if (!string.IsNullOrEmpty(endTime)){DateTime start1 = DateTime.ParseExact(startTime, "yyyy-MM-dd", System.Globalization.CultureInfo.CurrentCulture);//DateTime fStart = start1.AddDays(1);DateTime fStart = DateTime.ParseExact(endTime, "yyyy-MM-dd", System.Globalization.CultureInfo.CurrentCulture).AddDays(1);//if (start1 <= fStart)//{strwhere.Append(" and PurchaseTime >= '" + start1 + "' and PurchaseTime < '" + fStart + "'");//}}}//if (!string.IsNullOrEmpty(start.Value))//{//    if (!string.IsNullOrEmpty(end.Value))//    {//        DateTime start1 = DateTime.ParseExact(start.Value, "yyyy-MM-dd", System.Globalization.CultureInfo.CurrentCulture);//        //DateTime fStart = start1.AddDays(1);//        DateTime fStart = DateTime.ParseExact(end.Value, "yyyy-MM-dd", System.Globalization.CultureInfo.CurrentCulture).AddDays(1);//        strwhere.Append(" and PurchaseTime >= '" + start1 + "' and PurchaseTime < '" + fStart + "'");//    }//}//if (hidSearch.Value != null && !string.IsNullOrEmpty(hidSearch.Value))//{//    if (txtCondition.Value != null && !string.IsNullOrEmpty(txtCondition.Value))//    {//        var whereSearch = string.Format(@" and {0} like '%" + txtCondition.Value + "%'", hidSearch.Value, txtCondition.Value);//        strwhere.Append(whereSearch);//    }//}int page = Request.Form["page"] != "" ? Convert.ToInt32(Request.Form["page"]) : 0;int size = Request.Form["rows"] != "" ? Convert.ToInt32(Request.Form["rows"]) : 0;string sort = Request.Form["sort"] != "" ? Request.Form["sort"] : "";string order = Request.Form["order"] != "" ? Request.Form["order"] : "";var dt = assetsBll.DataPage("Assets", "*,CONVERT(varchar(100), PurchaseTime, 23) as PurchaseTime1", "addtime", "desc", size, page, strwhere.ToString(), out count);string json = string.Empty;//if (dt != null && dt.Rows.Count > 0 && dt.Rows[0] != null)//{json = JsonHelper.CreateJsonParameters(dt, true, count);//}//else//{//    json = JsonHelper.CreateJsonParameters(null, false, count);//}Response.Write(json);Response.End();}catch (Exception ex){throw ex;}}public void DelAssets(){var id = Request.QueryString["id"];if (id != null){string msg = "";IAssetsBll bll = new AssetsBll();if (!string.IsNullOrEmpty(id)){bool res = bll.DeleteDetail(Convert.ToInt32(id), out msg);if (res){Response.Write("{\"code\": 0,\"msg\": \"\",\"data\": {\"src\": \"\"}}");Response.End();//Response.Write("{\"code\": 0,\"msg\": \"\",\"data\": {\"src\": \"\"}}");}else{Response.Write("{\"code\": 1,\"msg\": \"\",\"data\": {\"src\": \"\"}}");Response.End();}}}else{Response.Write("{\"code\": 1,\"msg\": \"\",\"data\": {\"src\": \"\"}}");Response.End();}}#region 下载上传模板protected void DownloadOperation(){//string filePath = Server.MapPath("../excel") + @"\" + "电脑盘点导入模板.xls" + "";string filePath = Server.MapPath("../excel") + @"\" + "电脑盘点导入模板.xlsx" + "";byte[] data = File.ReadAllBytes(filePath);MemoryStream stream = new MemoryStream(data);Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}", "电脑盘点导入模板.xlsx"));Response.BinaryWrite(stream.ToArray());stream.Close();stream.Dispose();//File.Delete(filePath);Response.End();}#endregion#region 导入excel .xlsxprotected void btnImport_Click(object sender, EventArgs e){var fileup = fileUpload.PostedFile;//InsetData(Upload(fileup));//InsetData(fileup);// 说明：导入的方法if (fileUpload == null){Response.Write("<script>alert('请先选择Excel文件！');window.location.href='AssetsListNew.aspx'</script>");}else{string fileUrl = "";#region 文件上传//try//{//}//catch//{//    Response.Write("<script>alert('数据上传失败，请重新导入');window.location.href='table.aspx'</script>");//    res = false;//}//全名  string excelFile = this.fileUpload.PostedFile.FileName;//获取文件名（不包括扩展名）  string fileName = Path.GetFileNameWithoutExtension(fileup.FileName);if (fileName == "" || fileName == null){Response.Write("<script>alert('请先选择Excel文件！');window.location.href='AssetsListNew.aspx'</script>");}else{//扩展名  string extentionName = excelFile.Substring(excelFile.LastIndexOf(".") + 1);if (extentionName != "xlsx"){Response.Write("<script>alert('您上传的不是.xlsx文件！');window.location.href='AssetsListNew.aspx'</script>");}else{//浏览器安全性限制 无法直接获取客户端文件的真实路径，将文件上传到服务器端 然后获取文件源路径  #region 设置上传路径将文件保存到服务器string dateTime = DateTime.Now.Date.ToString("yyyyMMdd");string time = DateTime.Now.ToShortTimeString().Replace(":", "");string newFileName = dateTime + time + DateTime.Now.Millisecond.ToString() + ".xlsx";//自己创建的文件夹 位置随意 合理即可  fileUrl = Server.MapPath("..\\excel") + "\\" + newFileName;//fileUrl = Path.Combine(Request.MapPath("~/excel"), Path.GetFileName(fileup.FileName));fileup.SaveAs(fileUrl);//DataTable dtData = ExcelHelper.Import(fileUrl);//得到EXCEL的第二种方法(第一个参数是文件流,第二个是excel标签名,第三个是第几行开始读0算第一行)DataTable dt = ExcelHelper.RenderDataTableFromExcel(fileUrl, "Sheet1", 0);//Response.Write("<script>alert('已经上传到服务器文件夹')</script>");//return fileUrl;//3.删除服务器上的excel文件 获取路径并且删除//string FilePath = Server.MapPath(fileUrl);  // 必须转化以下文件路径，不能直接delete("image/4jpg");File.Delete(fileUrl);#endregion#region  dt导入数据库//3：从System.Data.DataTable导入数据到数据库//@param System.Data.DataTable dtIAssetsBll assetBll = new AssetsBll();IUserBll userBll = new UserBll();int i = 0;int num = 1;string numList = string.Empty;bool result = false;var addTime = DateTime.Now;var updateTime = DateTime.Now;if (dt != null && dt.Rows.Count > 0 && dt.Rows[0] != null){//查找现在数据表数据var assetsList = assetBll.SearchList(string.Format(@"select * from assets withnolck"));string msg = "";foreach (DataRow dr in dt.Rows){try{num += 1;if (dr != null){Assets assetmodel = new Assets();if (dr[0] != null){assetmodel.Number = dr[0].ToString().Trim();if (dr[1] != null){assetmodel.Type = dr[1].ToString().Trim();}if (dr[2] != null){assetmodel.Brand = dr[2].ToString().Trim();}if (dr[3] != null){assetmodel.IsMac = dr[3].ToString().Trim();}if (dr[4] != null){assetmodel.VideoCard = dr[4].ToString().Trim();}if (dr[5] != null){assetmodel.RAM = dr[5].ToString().Trim();}if (dr[6] != null){assetmodel.RigidDisk = dr[6].ToString().Trim();}if (dr[7] != null){assetmodel.CPU = dr[7].ToString().Trim();}if (!(dr[8] is DBNull)){DateTime purchaseTime = DateTime.Now;if (DateTime.TryParse(dr[8].ToString(), out purchaseTime)){assetmodel.PurchaseTime = Convert.ToDateTime(dr[8].ToString());}}if (!(dr[9] is DBNull)){assetmodel.Monetary = Convert.ToDecimal(dr[9]);}if (dr[10] != null){assetmodel.Size = dr[10].ToString().Trim();}if (dr[11] != null){assetmodel.Department = dr[11].ToString().Trim();}if (dr[12] != null){assetmodel.BelongName = dr[12].ToString().Trim();string sql = string.Format(@"select top 1 id from [user] where account = '{0}'", assetmodel.BelongName);var dtUser = userBll.SearchAll(sql);if (dtUser != null && dtUser.Rows.Count > 0 && dtUser.Rows[0] != null){assetmodel.BelongUser = Convert.ToInt32(dtUser.Rows[0]["id"]);}}if (dr[13] != null){assetmodel.Position = dr[13].ToString().Trim();}if (dr[14] != null){assetmodel.ProDirection = dr[14].ToString().Trim();}if (!(dr[15] is DBNull)){assetmodel.SellingPrice = Convert.ToDecimal(dr[15]);}if (dr[16] != null){assetmodel.Remark = dr[16].ToString().Trim();}assetmodel.AddTime = addTime;assetmodel.UpdateTime = updateTime;var assetsId = assetsList.Where(t => t.Number == assetmodel.Number).Select(m => m.Id).FirstOrDefault();if (assetsId > 0)//存在就修改{assetmodel.AddTime = assetsList.Where(t => t.Number == assetmodel.Number).Select(m => m.AddTime).FirstOrDefault();assetmodel.UpdateTime = updateTime;assetmodel.Id = assetsId;result = assetBll.Update(assetmodel, out msg);}else//不存在就添加{result = assetBll.Add(assetmodel, out msg);}}}if (result){i++;}else{numList = numList + num + ',';continue;//Response.Write("<script>alert(' 导入失败，数据格式出错！');window.location.href='AssetsList.aspx'</script>");}}catch (Exception ex){numList = numList + num + ',';//continue;throw ex;//Response.Write("<script>alert(' 未完全导入：共导入" + i + "组数据！ 未完全导入数据为第" + numList.Trim(',') + "行！');window.location.href='AssetsList.aspx'</script>");}}}else{Response.Write("<script>alert('EXCEL文件为空文件!');window.location.href='AssetsListNew.aspx'</script>");}if (numList == string.Empty){Response.Write("<script>alert(' 导入成功：共导入" + i + "组数据！');window.location.href='AssetsListNew.aspx'</script>");//res = true;}else{Response.Write("<script>alert(' 未完全导入：共导入" + i + "组数据！ 未完全导入数据为第" + numList.Trim(',') + "行！');window.location.href='AssetsListNew.aspx'</script>");//res = true;}}}#endregion#endregion}}#endregionprotected Assets loadAssets(string id){var assets = new Assets();try{IAssetsBll assetsBll = new AssetsBll();string sql = string.Format(@"select * from Assets withnolock where ISNULL(IsDelete,0)<>1 and id='{0}'", id);var assetsList = assetsBll.SearchList(sql);if (assetsList.Any()){assets = assetsList.FirstOrDefault();}return assets;}catch (Exception ex){throw ex;}}protected void MakeORCode(string id){try{var asset = loadAssets(id);if (asset.Id > 0){var url = Server.MapPath("..\\qrcode") + "\\" + "bg.jpg";//var urlHtml = Server.MapPath("UserLogin.aspx");string urlHtml = string.Format(@"AssetDetailsShow.aspx?id='{0}'", asset.Id);var img = CreateORCode.GenerateQrCodeWithLogo(urlHtml, 400, 400, url, "资产编号：" + asset.Number);System.IO.MemoryStream MStream = new System.IO.MemoryStream();img.Save(MStream, System.Drawing.Imaging.ImageFormat.Png);Response.ClearContent();//Response.ContentType = "image/Png";//Response.BinaryWrite(MStream.ToArray());//Response.End();Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}", asset.Number + ".png"));Response.BinaryWrite(MStream.ToArray());//string dateTime = DateTime.Now.Date.ToString("yyyyMMdd");//string time = DateTime.Now.ToShortTimeString().Replace(":", "");//string newFileName = dateTime + time + DateTime.Now.Millisecond.ToString() + ".png"; //string fileUrl = Server.MapPath("..\\qrcode") + "\\" + newFileName;string fileUrl = Server.MapPath("..\\qrcode") + "\\" + asset.Number + ".png";if (System.IO.File.Exists(fileUrl)){//存在文件FileInfo file = new FileInfo(fileUrl);file.Delete();}//不存在文件 FileStream fs = new FileStream(fileUrl, FileMode.CreateNew, FileAccess.ReadWrite);BinaryWriter bw = new BinaryWriter(fs, UTF8Encoding.UTF8);byte[] by = MStream.ToArray();for (int i = 0; i < MStream.ToArray().Length; i++){bw.Write(by[i]);}fs.Close();MStream.Close();MStream.Dispose();//Response.End();//Response.Write("<script>alert('成功生成二维码!');</script>");}else{Response.Write("<script>window.location.href='AssetsListNew.aspx';alert('生成二维码失败，不存在该条记录!');</script>");}}catch (Exception ex){throw ex;}}}
}

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