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

        private void printDocNew_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
        {
            Graphics g = e.Graphics;

            g.Clear(Color.White);

            g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
            g.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
            g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            // 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。  
            g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
            // 指定高质量、低速度呈现。  
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;

            int sz = (int)g.VisibleClipBounds.Width;//关键代码，获取可见的实际宽度
            Bitmap img = Zxing_QRCode(txtQrContent.Text.Trim(), sz, sz);

            Bitmap imgP = GetImagePure(img);
           
            int destSize = (int)(g.VisibleClipBounds.Width * 0.8);

            Rectangle rectDest = new Rectangle(img.Width / 2 - destSize / 2, img.Height / 2 - destSize / 2, destSize, destSize);

            e.Graphics.DrawImage(imgP, rectDest);

            imgP.Dispose();
            img.Dispose();

            string txt = txtBottomText.Text.Trim();
            if (txt != "")
            {
                SizeF sf = g.MeasureString(txt, FontText);
                g.DrawString(txt, FontText, Brushes.Black, g.VisibleClipBounds.Width / 2 - sf.Width / 2, rectDest.Bottom);//2 *
            }
        }