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ASP.NET实现二维码(QRCode)的创建和读取
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一、項目引用QRCode的DLL文件(ThoughtWorks.QRCode.dll) 二、ASPX頁面(兩個jquery的js文件請自行去官網(wǎng)下載): [html]? <html xmlns="http://www.w3.org/1999/xhtml"> ? <head runat="server"> ? <title>二維碼工具測試</title> ? <script type="text/javascript" src="../../Scripts/Jquery/jquery-1.6.2.js"></script> ? <script type="text/javascript" src="../../Scripts/Jquery/jquery.form.js"></script> ? ? ? <script type="text/javascript" src="js/test.js"></script> ? <style type="text/css"> ? .style1 ? { ? width: 100%; ? } ? #txt_qr ? { ? width: 632px; ? } ? </style> ? </head> ? <body> ? <div> ? <table class="style1"> ? <tr> ? <td> ? 輸入文字: ? </td> ? <td> ? <input type="text" id="txt_qr" name="txt_qr" /> ? </td> ? </tr> ? <tr> ? <td> ? 二維碼圖片 ? </td> ? <td> ? <img id="qrimg" alt="二維碼圖片" /> ? </td> ? </tr> ? <tr> ? <td> ? 生成選項 ? </td> ? <td> ? Encoding:<select id="Encoding"> ? <option value="Byte">Byte</option> ? <option value="AlphaNumeric">AlphaNumeric</option> ? <option value="Numeric">Numeric</option> ? </select> ? Correction Level:<select id="Level"> ? <option value="M">M</option> ? <option value="L">L</option> ? <option value="Q">Q</option> ? <option value="H">H</option> ? </select> ? Version:<input id="txt_ver" type="text" value="7" />(1-40) Size:<input id="txt_size" ? type="text" value="4" /> ? </td> ? </tr> ? <tr> ? <td colspan="4"> ? <input type="button" οnclick="getQrImg();" value="生成二維碼" /> ? </td> ? </tr> ? <tr> ? <td> ? <form id="qrForm" action="Ashx/test.ashx" method="post" enctype="multipart/form-data"> ? <input type="file" id="file_qr" name="file_qr" /><input type="submit" value="讀取二維碼" /> ? </form> ? </td> ? <td colspan="1"> ? <img id="img_qr" alt="要讀取的圖片" /><br /> ? <input id="txt_readqr" type="text" /> ? </td> ? </tr> ? </table> ? </div> ? </body> ? </html> ? 三、test.js文件 [javascript] ? $(document).ready(function () ? { ? var options = { ? beforeSubmit: showRequest, ? ? success: showResponse, ? ? ? ? ? ? dataType: 'json', ?? clearForm: true, ? ? ? ? ? ? ? error: function (request, message, ex) ?? { ? alert('錯誤:' + message); ? } ? }; ? ? ?? $('#qrForm').ajaxForm(options); ? }); ? function showRequest(formData, jqForm, options) ? { ?? return true; ? } ? function showResponse(responseText, statusText, xhr, $form) ? { ? if (responseText[0].count == 0) ? { ? alert(responseText[0].list[0].error); ? return false; ? } ? $("#img_qr").attr("src", responseText[0].list[0].imgurl); ? $("#txt_readqr").val(responseText[0].list[0].qrtext); ? return false; ? } ? function getQrImg() ? { ? var txt_qr = escape($.trim($("#txt_qr").val())); ? var qrEncoding = $("#Encoding").val(); ; ? var Level = $("#Level").val(); ; ? var txt_ver = $("#txt_ver").val(); ; ? var txt_size = $("#txt_size").val(); ; ? $.ajax({ ? type: "GET", ? data: "cmd=set&txt_qr=" + txt_qr + "&qrEncoding=" + qrEncoding + "&Level=" + Level + "&txt_ver=" + txt_ver + "&txt_size=" + txt_size, ? url: "Ashx/test.ashx", ? dataType: 'text', ? beforeSend: function (x) ? { ? x.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=utf-8"); ? }, ? success: function (json) ? { ? var dataObj = eval(json); ? ? ? ? ? ? ?? $("#qrimg").attr("src", dataObj[0].list[0].imgurl); ? ? ? ? ? ? ? return false; ? }, ? error: function (request, message, ex) ? { ? alert("錯誤:" + message); ? } ? }); ? } ? 四、test.ashx,沒有判斷目錄是否存在等問題,請自行建立或者更改代碼。 [csharp] ? using System; ? using System.Web; ? using System.Drawing; ? using System.Drawing.Imaging; ? using System.Text; ? using System.Text.RegularExpressions; ? using ThoughtWorks.QRCode.Codec; ? using ThoughtWorks.QRCode.Codec.Data; ? using ThoughtWorks.QRCode.Codec.Util; ? public class test : IHttpHandler ? { ? public void ProcessRequest(HttpContext context) ? { ? context.Response.ContentType = "text/plain"; ? string cmd = context.Request["cmd"] == null ? "get" : context.Request["cmd"].ToString(); ? string filename = string.Empty; ? string filepath = string.Empty; ? switch (cmd) ? { ? case "get": ? if (context.Request.Files.Count > 0) ? { ? for (int j = 0; j < context.Request.Files.Count; j++) ? { ? filename = Guid.NewGuid().ToString() + "_tmp.jpg"; ? filepath = context.Server.MapPath(@"~\Utilty\QRCode\upload") + "\\" + filename; ? string qrdecode = string.Empty; ? HttpPostedFile uploadFile = context.Request.Files[j]; ? uploadFile.SaveAs(filepath); ? QRCodeDecoder decoder = new QRCodeDecoder(); ? ? ? ? ? ? ? ? ? ? ? ? ?? Bitmap bm = new Bitmap(filepath); ? qrdecode = decoder.decode(new QRCodeBitmapImage(bm)); ? bm.Dispose(); ? ? ? ? ? ? ? ? ? ? context.Response.Write("[{\"count\":1,\"list\":[{\"imgurl\":\"upload/" + filename + "\",\"qrtext\":\"" + qrdecode + "\"}]}]"); ? } ? } ? else ? { ? context.Response.Write("[{\"count\":0,\"list\":[{\"error\":\"沒有上傳文件\"}]}]"); ? } ? break; ? case "set": ? string txt_qr =ConverToGB(context.Request["txt_qr"].ToString().Trim(), 16); ? string qrEncoding = context.Request["qrEncoding"].ToString(); ? string Level = context.Request["Level"].ToString(); ? string txt_ver = context.Request["txt_ver"].ToString(); ? string txt_size = context.Request["txt_size"].ToString(); ? QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(); ? String encoding = qrEncoding; ? if (encoding == "Byte") ? { ? qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE; ? } ? else if (encoding == "AlphaNumeric") ? { ? qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.ALPHA_NUMERIC; ? } ? else if (encoding == "Numeric") ? { ? qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.NUMERIC; ? } ? try ? { ? int scale = Convert.ToInt16(txt_size); ? qrCodeEncoder.QRCodeScale = scale; ? } ? catch (Exception ex) ? { ? return; ? } ? try ? { ? int version = Convert.ToInt16(txt_ver); ? qrCodeEncoder.QRCodeVersion = version; ? } ? catch (Exception ex) ? { ? return; ? } ? string errorCorrect = Level; ? if (errorCorrect == "L") ? qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L; ? else if (errorCorrect == "M") ? qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M; ? else if (errorCorrect == "Q") ? qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.Q; ? else if (errorCorrect == "H") ? qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.H; ? Image image; ? String data = txt_qr; ? image = qrCodeEncoder.Encode(data); ? filename = Guid.NewGuid().ToString() + ".jpg"; ? filepath = context.Server.MapPath(@"~\Utilty\QRCode\upload") + "\\" + filename; ? System.IO.FileStream fs = new System.IO.FileStream(filepath, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write); ? image.Save(fs, System.Drawing.Imaging.ImageFormat.Jpeg); ? fs.Close(); ? image.Dispose(); ? context.Response.Write("[{\"count\":1,\"list\":[{\"imgurl\":\"upload/" + filename + "\"}]}]"); ? //context.Response.Write(@"upload\" + filename); ? break; ? } ? } ? /// <summary> ? /// 10進制或16進制轉(zhuǎn)換為中文 ? /// </summary> ? /// <param name="name">要轉(zhuǎn)換的字符串</param> ? /// <param name="fromBase">進制(10或16)</param> ? /// <returns></returns> ? public string ConverToGB(string text, int fromBase) ? { ? string value = text; ? MatchCollection mc; ? System.Text.StringBuilder sb = new System.Text.StringBuilder(); ? switch (fromBase) ? { ? case 10: ? MatchCollection mc1 = Regex.Matches(text, @"&#([\d]{5})", RegexOptions.Compiled | RegexOptions.IgnoreCase); ? foreach (Match _v in mc1) ? { ? string w = _v.Value.Substring(2); ? w = Convert.ToString(int.Parse(w), 16); ? byte[] c = new byte[2]; ? string ss = w.Substring(0, 2); ? int c1 = Convert.ToInt32(w.Substring(0, 2), 16); ? int c2 = Convert.ToInt32(w.Substring(2), 16); ? c[0] = (byte)c2; ? c[1] = (byte)c1; ? sb.Append(Encoding.Unicode.GetString(c)); ? } ? value = sb.ToString(); ? break; ? case 16: ? mc = Regex.Matches(text, @"\\u([\w]{2})([\w]{2})", RegexOptions.Compiled | RegexOptions.IgnoreCase); ? if (mc != null && mc.Count > 0) ? { ? foreach (Match m2 in mc) ? { ? string v = m2.Value; ? string w = v.Substring(2); ? byte[] c = new byte[2]; ? int c1 = Convert.ToInt32(w.Substring(0, 2), 16); ? int c2 = Convert.ToInt32(w.Substring(2), 16); ? c[0] = (byte)c2; ? c[1] = (byte)c1; ? sb.Append(Encoding.Unicode.GetString(c)); ? } ? value = sb.ToString(); ? } ? break; ? } ? return value; ? } ? public bool IsReusable ? { ? get ? { ? return false; ? } ? } ? } ?
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