PDF 生成、解析二维码
界面样式：
第一步：下载ThoughtWorks.QRCode.dll 类并引用
地址 http://download.csdn.net/detail/liwb1987/8500113
第二步：设置控件到界面上
第三部：生成按钮下代码
private void btnCreateQRCodeClick(object sender, RoutedEventArgs e) { try { ShowQRCode(); } catch (Exception ex) { MessageBox.Show("生成二维码出错！", "系统提示"); return; } } ShowQRCode(); 在这个方法里面有调用了三个方法都有返回值
////// 显示生成的二维码 /// public void ShowQRCode() { if (txtQRCodeContent.Text.Trim().Length <= 0) { MessageBox.Show("二维码内容不能为空，请输入内容！", "系统提示"); txtQRCodeContent.Focus(); return; } bimg = CreateQRCode(txtQRCodeContent.Text); imgQRcode.Source = BitmapToBitmapImage(bimg); ResetImageStrethch(imgQRcode, bimg); }
（1）CreateQRCode 将文本转换成为 Bitmap 格式
public Bitmap CreateQRCode(string content) { QRCodeEncoder qrEncoder = new QRCodeEncoder(); qrEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE; qrEncoder.QRCodeScale = Convert.ToInt32(txtSize.Text); qrEncoder.QRCodeVersion = Convert.ToInt32(cboVersion.SelectedValue); qrEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M; try { Bitmap qrcode = qrEncoder.Encode(content, Encoding.UTF8); if (!logoImagepath.Equals(string.Empty)) { Graphics g = Graphics.FromImage(qrcode); Bitmap bitmapLogo = new Bitmap(logoImagepath); int logoSize = Convert.ToInt32(txtLogoSize.Text); bitmapLogo = new Bitmap(bitmapLogo, new System.Drawing.Size(logoSize, logoSize)); PointF point = new PointF(qrcode.Width / 2 - logoSize / 2, qrcode.Height / 2 - logoSize / 2); g.DrawImage(bitmapLogo, point); } return qrcode; } catch (IndexOutOfRangeException ex) { MessageBox.Show("超出当前二维码版本的容量上限，请选择更高的二维码版本！", "系统提示"); return new Bitmap(100, 100); } catch (Exception ex) { MessageBox.Show("生成二维码出错！", "系统提示"); return new Bitmap(100, 100); } }
BitmapToBitmapImage 再次转换成image 格式 显示在界面上
public BitmapImage BitmapToBitmapImage(Bitmap bitmap) { BitmapImage bImage = new BitmapImage(); MemoryStream ms = new MemoryStream(); bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Png); bImage.BeginInit(); bImage.StreamSource = new MemoryStream(ms.ToArray()); bImage.EndInit(); return bImage; } ResetImageStrethch（填充附加图片）
private void ResetImageStrethch(System.Windows.Controls.Image img, Bitmap bImg) { if (bImg.Width <= img.Width) { img.Stretch = Stretch.None; } else { img.Stretch = Stretch.Fill; } } 添加Logo 添加按钮
////// 添加Logo按钮处理事件 /// /// /// private void btnAddLogoClick(object sender, RoutedEventArgs e) { OpenFileDialog openDialog = new OpenFileDialog(); openDialog.Filter = "图片文件|*.jpg;*.png;*.gif|All files(*.*)|*.*"; if (openDialog.ShowDialog() == true) { logoImagepath = openDialog.FileName; Bitmap bImg = new Bitmap(logoImagepath); imgLogo.Source = new BitmapImage(new Uri(openDialog.FileName)); ResetImageStrethch(imgLogo, bImg); } }
第三步 解析二维码
解析按钮下代码
private void DecodeQRCodeClick(object sender, RoutedEventArgs e) { try { tbDecodeResult.Text = ""; DecodeQRCode(); } catch (Exception ex) { MessageBox.Show("解析二维码出错！", "系统提示"); return; } } DecodeQRCode()方法
////// 解析二维码 /// public void DecodeQRCode() { if (bimg == null) { MessageBox.Show("请先打开一张二维码图片！", "系统提示"); return; } QRCodeDecoder qrDecoder = new QRCodeDecoder(); QRCodeImage qrImage = new QRCodeBitmapImage(bimg); tbDecodeResult.Text = qrDecoder.decode(qrImage, Encoding.UTF8); }
将解析的内容显示在界面上
第四步
打开二维码按钮
OpenFileDialog openDialog = new OpenFileDialog(); openDialog.Filter = "图片文件|*.jpg;*.png;*.gif|All files(*.*)|*.*"; if (openDialog.ShowDialog() == true) { bimg = new Bitmap(openDialog.FileName); imgQRcode.Source = new BitmapImage(new Uri(openDialog.FileName)); ResetImageStrethch(imgQRcode, bimg); } 保存按钮
private void btnSaveClick(object sender, RoutedEventArgs e) { SaveFileDialog saveDialog = new SaveFileDialog(); saveDialog.Filter = "Png文件(*.Png)|*.png|All files(*.*)|*.*"; if (saveDialog.ShowDialog() == true) { try { SaveQRCode(saveDialog.FileName); MessageBox.Show("保存成功！", "系统提示"); } catch (Exception ex) { MessageBox.Show("保存二维码出错！", "系统提示"); return; } } } C# winform生成二维码
界面样式