printDocument设置适应边框打印 特重要 找了半天 设置一个属性即可

       private void pd_PrintPage(object sender, PrintPageEventArgs e)
        {
            e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            //下面这个也设成高质量
            e.Graphics.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            //下面这个设成High
            e.Graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
            e.Graphics.DrawImage(image,
               e.Graphics.VisibleClipBounds);
            e.HasMorePages = false;
        }

　　关键在于

e.Graphics.VisibleClipBounds 设置打印可见区域 即整个图片