C#高清打印关键代码

打印过程中，获取可见的实际宽度作为打印，就没有收缩的了，图片收缩放大是模糊的原因之一，所以所见所得就是最好的方法

 1         private void printDocNew_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
 2         {
 3             Graphics g = e.Graphics;
 4 
 5             g.Clear(Color.White);
 6 
 7             g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
 8             g.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
 9             g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
10             // 指定高质量的双三次插值法。执行预筛选以确保高质量的收缩。此模式可产生质量最高的转换图像。  
11             g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
12             // 指定高质量、低速度呈现。  
13             g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
14             g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
15 
16             int sz = (int)g.VisibleClipBounds.Width;//关键代码，获取可见的实际宽度
17             Bitmap img = Zxing_QRCode(txtQrContent.Text.Trim(), sz, sz);
18 
19             Bitmap imgP = GetImagePure(img);
20            
21             int destSize = (int)(g.VisibleClipBounds.Width * 0.8);
22 
23             Rectangle rectDest = new Rectangle(img.Width / 2 - destSize / 2, img.Height / 2 - destSize / 2, destSize, destSize);
24 
25             e.Graphics.DrawImage(imgP, rectDest);
26 
27             imgP.Dispose();
28             img.Dispose();
29 
30             string txt = txtBottomText.Text.Trim();
31             if (txt != "")
32             {
33                 SizeF sf = g.MeasureString(txt, FontText);
34                 g.DrawString(txt, FontText, Brushes.Black, g.VisibleClipBounds.Width / 2 - sf.Width / 2, rectDest.Bottom);//2 *
35             }
36         }