PrintDocument的不打印完整形式

Question

我想打印整个形式的大小（1415x1000）的。但它是打印尺寸（1185x740）的形式。

我指的是代码从MSDN网站：

[System.Runtime.InteropServices.DllImport("gdi32.dll")] 
    public static extern long BitBlt(IntPtr hdcDest, int nXDest, int nYDest, int nWidth, int nHeight, IntPtr hdcSrc, int nXSrc, int nYSrc, int dwRop); 
    private Bitmap memoryImage; 

    private void CaptureScreen() 
    { 

     Graphics mygraphics = this.CreateGraphics(); 

     Size s = this.Size; 

     memoryImage = new Bitmap(s.Width, s.Height, mygraphics); 

     Graphics memoryGraphics = Graphics.FromImage(memoryImage); 
     IntPtr dc1 = mygraphics.GetHdc(); 

     IntPtr dc2 = memoryGraphics.GetHdc(); 
     BitBlt(dc2, 0, 0, this.ClientRectangle.Width, this.ClientRectangle.Height, dc1, 0, 0, 13369377);//13369376); 

     mygraphics.ReleaseHdc(dc1); 

     memoryGraphics.ReleaseHdc(dc2); 

    } 

    private void printDocument1_PrintPage(object sender, PrintPageEventArgs e) 
    { 
     e.Graphics.DrawImage(memoryImage, 0, 0); 
    } 

private void button1_Click_1(object sender, EventArgs e) 
    { 
     panel1.Hide(); 
     CaptureScreen(); 
     PrintDocument myDoc = new PrintDocument(); 
     myDoc.PrinterSettings.DefaultPageSettings.PaperSize = new System.Drawing.Printing.PaperSize("Custom", 1415, 1000); 
     PrintPreviewDialog print_dlg = new PrintPreviewDialog(); 
     print_dlg.Document = printDocument1; 
     print_dlg.ShowDialog(); 
    } 

但我不能让打印输出中的完整形式。我怎么做？

Answer 1

由Graphics使用的默认缩放目的是通过创建的PrintDocument是GraphicsUnit.Display。它将100像素映射到一英寸。这通常与视频适配器的每英寸点数设置很匹配，默认值为每英寸96像素。因此，无论您在纸张上打印的尺寸与显示器上的尺寸大致相同。

这并不为你的截图工作这么好但是，监视器太大。或者您使用的纸张太小，请选择;）您必须将其缩小。要么使用Graphics.DrawImage（Image，Rectangle）过载，要么使用Graphics.ScaleTransform（）将其绘制得更小。您可能还想使用Graphics.TranslateTransform（），以便图像以纸张为中心。使用e.MarginBounds查找纸张的大小。 PrintDocument事件处理程序的一些示例代码演示了如何使其适用于任何显示器大小：

private void printDocument1_QueryPageSettings(object sender, System.Drawing.Printing.QueryPageSettingsEventArgs e) { 
     e.PageSettings.Landscape = true; 
    } 

    private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e) { 
     // Make screenshot 
     var scr = Screen.FromPoint(this.Location); 
     using (var bmp = new Bitmap(scr.Bounds.Width, scr.Bounds.Height)) { 
      using (var gr = Graphics.FromImage(bmp)) { 
       gr.CopyFromScreen(new Point(scr.Bounds.Left, scr.Bounds.Top), Point.Empty, bmp.Size); 
      } 
      // Determine scaling 
      float scale = 1.0f; 
      scale = Math.Min(scale, (float)e.MarginBounds.Width/bmp.Width); 
      scale = Math.Min(scale, (float)e.MarginBounds.Height/bmp.Height); 
      // Set scaling and offset 
      e.Graphics.TranslateTransform(e.MarginBounds.Left + (e.MarginBounds.Width - bmp.Width * scale)/2, 
              e.MarginBounds.Top + (e.MarginBounds.Height - bmp.Height * scale)/2); 
      e.Graphics.ScaleTransform(scale, scale); 
      // And draw 
      e.Graphics.DrawImage(bmp, 0, 0); 
     } 
    }