本文實例講述了C#基于QRCode實現動態生成自定義二維碼圖片功能。分享給大家供大家參考，具體如下：
二維碼早就傳遍大江南北了，總以為它是個神奇的東西，其實細細研究之后發現也沒想象的那么神秘，碰巧最近項目中需要動態生成二維碼，解決完實際問題之后，簡單總結整理一下。項目中除了動態生成二維碼之外，還實現了動態生成自定義圖片，二維碼可以是其中的元素。
設置圖片的數據源為動態圖片
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<body> <form id="form1" runat="server" > <div> <img src="GenerateImage.aspx?type=2" /> </div> </form></body> |
動態生成圖片
GenerateImage.aspx.cs文件內容
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protected void Page_Load(object sender, EventArgs e){ string type = Request.QueryString["type"].ToString(); Bitmap codeImage = Create_QRCode("分享才能獲得更多，我盡力而為(5201314)", 6); MemoryStream ms = Create_ImgCode(codeImage, "分享才能獲得更多，我盡力而為", "5201314", type); Response.ClearContent(); Response.ContentType = "image/Png"; Response.BinaryWrite(ms.ToArray()); Response.End();}private Bitmap Create_QRCode(string codeNumber, int size){ //創建二維碼生成類 QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(); //設置編碼模式 qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE; //設置編碼測量度 qrCodeEncoder.QRCodeScale = size; //設置編碼版本 qrCodeEncoder.QRCodeVersion = 10; //設置編碼錯誤糾正 qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M; //生成二維碼圖片 System.Drawing.Bitmap codeImage = qrCodeEncoder.Encode(codeNumber, Encoding.UTF8); return codeImage;}/// <summary>/// 生成自定義圖片/// </summary>/// <param name="codeImage">生成的二維碼</param>/// <param name="objectName">物體名稱</param>/// <returns>自定義圖片內存流</returns>private MemoryStream Create_ImgCode(Bitmap codeImage, string objectName, string objectCode, string type){ string path = string.Empty; if (type == "1") { //設置背景圖片 path = Server.MapPath("Images/backimg1.png"); } else if (type == "2") { //設置背景圖片 path = Server.MapPath("Images/backimg2.png"); } System.Drawing.Image img = System.Drawing.Image.FromFile(path); Bitmap bg = new Bitmap(img); //為畫布bg(圖片bg)創建一只畫筆 Graphics g = Graphics.FromImage(bg); if (type == "1") { //【1】將位圖文件codeImage畫到畫布g上 //【2】codeImage左上角距畫布左邊界25px、距畫布上邊界56px //【3】codeImage的長為原長、寬為原寬 g.DrawImage(codeImage, 25, 56, codeImage.Width, codeImage.Height); } else if (type == "2") { g.DrawImage(codeImage, 132, 19, 162, 162); System.Drawing.Brush b = new SolidBrush(Color.Black); Font font = new Font("宋體", 8, FontStyle.Regular); StringFormat sf = new StringFormat(); sf.LineAlignment = StringAlignment.Center; // 垂直居中 sf.Alignment = StringAlignment.Near; // 水平左對齊 //string也是畫到畫布上的，當畫的string長度大于112px時會自動換行 SizeF stringSize = g.MeasureString("我的宣言：", font, 112, sf); int nWidth = (int)stringSize.Width + 1; int nHeight = (int)stringSize.Height + 1; RectangleF rf = new Rectangle(new Point(12, 64), new Size(nWidth, nHeight)); g.DrawString("我的宣言：", font, b, rf, sf); stringSize = g.MeasureString(objectName, font, 112, sf); int objectWidth = (int)stringSize.Width + 1; int objectHeight = (int)stringSize.Height + 1; rf = new Rectangle(new Point(12, 64 + nHeight + 8), new Size(objectWidth, objectHeight)); g.DrawString(objectName, font, b, rf, sf); SizeF stringSize1 = g.MeasureString("幸運數字：", font, 112, sf); nWidth = (int)stringSize1.Width + 1; nHeight = (int)stringSize1.Height + 1; RectangleF rf1 = new Rectangle(new Point(12, 136), new Size(nWidth, nHeight)); g.DrawString("幸運數字：", font, b, rf1, sf); stringSize1 = g.MeasureString(objectCode, font, 112, sf); objectWidth = (int)stringSize1.Width + 1; objectHeight = (int)stringSize1.Height + 1; rf1 = new Rectangle(new Point(12, 136 + nHeight + 8), new Size(objectWidth, objectHeight)); g.DrawString(objectCode, font, b, rf1, sf); } g.Dispose(); GC.Collect(); System.IO.MemoryStream ms = new System.IO.MemoryStream(); bg.Save(ms, System.Drawing.Imaging.ImageFormat.Png); //將畫布bg(圖片bg)保存到指定路徑 path = Server.MapPath("Images"); bg.Save(path + "\\photoName.png", System.Drawing.Imaging.ImageFormat.Png); codeImage.Dispose(); bg.Dispose(); return ms;} |
ThoughtWorks.QRCode.dll點擊此處本站下載。
希望本文所述對大家C#程序設計有所幫助。
原文鏈接：https://blog.csdn.net/xiaouncle/article/details/52588947
