c# zxing生成二维码和打印

生成二维码代码

asset=“要生成的字符串”；
public static Bitmap CreateQRCode(string asset) { EncodingOptions options = new QrCodeEncodingOptions { DisableECI = true, CharacterSet = "UTF-8", Width = 120, Height = 120 }; BarcodeWriter writer = new BarcodeWriter(); writer.Format = BarcodeFormat.QR_CODE; writer.Options = options; return writer.Write(asset); }

生成图片的方法

public static Image GetPrintPicture(Bitmap image, AssetEntity asset, int picWidth, int picHeight) { Bitmap printPicture = new Bitmap(picWidth, picHeight); int height = 5; Font font = new Font("黑体", 10f); Graphics g = Graphics.FromImage(printPicture); Brush brush = new SolidBrush(Color.Black); g.SmoothingMode = SmoothingMode.HighQuality; g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;//若是不填加反锯齿代码效果如图1 int interval = 15; int pointX = 5; Rectangle destRect = new Rectangle(190, 10, image.Width, image.Height); g.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel); height += 8; RectangleF layoutRectangle = new RectangleF(pointX, height, 260f, 85f); g.DrawString("资产编号:" + asset.Serial, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.DrawString("资产名称:" + asset.Name, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.DrawString("类 别:" + asset.Category, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.DrawString("规格型号:" + asset.Model, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.DrawString("生产厂家:" + asset.Manufacturer, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.DrawString("启用时间:" + asset.StartUseTime, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.DrawString("资产价格:" + asset.Price, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.DrawString("保管单位:" + asset.Department, font, brush, layoutRectangle); //height += interval; layoutRectangle = new RectangleF(pointX + 150, height, 230f, 85f); g.DrawString("保管人:" + asset.Manager, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.DrawString("存放地点:" + asset.StoragePlace, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 240f, 85f); g.DrawString("备 注:" + asset.Remark, font, brush, layoutRectangle); return printPicture; }

显示效果以下

图1与图2都是咱们想要的效果，看起还算不错，若是仅仅保存为图片还能够，可是想要把这种布局的图片打印出来，结果是很不理想的。

图1

图2

图1打印效果文字不够平滑，很是难看，为了让图片上的文字平滑，加上这么一句话：g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;//反锯齿，
加上这句话后显示如图2，图2的效果貌似符合要求了，看着很是好，可是用二维码打印机打印出的效果很是的不清晰，这下难住了，通过查不少资料得出结论：想要平滑的效果就必须牺牲清晰度。

这样的结论客户确定不能接受，后来发现打印的事件提供了画图的Graphics的属性改进后的代码以下：

改进代码

public static void GetPrintPicture(Bitmap image, AssetEntity asset, PrintPageEventArgs g) { int height = 5; Font font = new Font("宋体", 10f); Brush brush = new SolidBrush(Color.Black); g.Graphics.SmoothingMode = SmoothingMode.HighQuality; int interval = 15; int pointX = 5; Rectangle destRect = new Rectangle(190, 10, image.Width, image.Height); g.Graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel); height += 8; RectangleF layoutRectangle = new RectangleF(pointX, height, 260f, 85f); g.Graphics.DrawString("资产编号:" + asset.Serial, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.Graphics.DrawString("资产名称:" + asset.Name, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.Graphics.DrawString("类 别:" + asset.Category, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.Graphics.DrawString("规格型号:" + asset.Model, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.Graphics.DrawString("生产厂家:" + asset.Manufacturer, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.Graphics.DrawString("启用时间:" + asset.StartUseTime, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.Graphics.DrawString("资产价格:" + asset.Price, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.Graphics.DrawString("保管单位:" + asset.Department, font, brush, layoutRectangle); //height += interval; layoutRectangle = new RectangleF(pointX + 150, height, 230f, 85f); g.Graphics.DrawString("保管人:" + asset.Manager, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 230f, 85f); g.Graphics.DrawString("存放地点:" + asset.StoragePlace, font, brush, layoutRectangle); height += interval; layoutRectangle = new RectangleF(pointX, height, 240f, 85f); g.Graphics.DrawString("备 注:" + asset.Remark, font, brush, layoutRectangle); }

打印代码

private void sbtnPrintQRCode_Click(object sender, EventArgs e) { PrintDocument document = new PrintDocument(); Margins margins = new Margins(0x87, 20, 5, 20); document.DefaultPageSettings.Margins = margins; PrintPreviewDialog dialog = new PrintPreviewDialog(); document.PrintPage += new PrintPageEventHandler(this.pd_PrintPage); dialog.Document = document; try { if (this.CurrentPrintQRCode != null && this.CurrentPrintQRCode.Count() > 0) { document.Print(); Thread.Sleep(1000); } } catch (Exception exception) { DevExpress.XtraEditors.XtraMessageBox.Show(exception.Message, "打印出错", MessageBoxButtons.OK, MessageBoxIcon.Hand); document.PrintController.OnEndPrint(document, new PrintEventArgs()); } }

private void pd_PrintPage(object sender, PrintPageEventArgs e) //触发打印事件 { //PointF f = new PointF(20, 10);//原来方法 //if (currentPrintImage != null) //{ // e.Graphics.DrawImage(this.currentPrintImage, f); //} CreatePicture.GetPrintPicture(this.bitmap, this.assetInfo, e); }