打印控件 [英] Printing a control

问题描述

我想知道是否有一种简单的方法可以将C＃中的任何控件输出到打印机。我的具体示例是尝试将TableLayoutPanel打印到收据上（这样我就不必担心分页符或其他问题），但是我希望能够打印出发送给我的任何可见对象。现在，我必须先创建一个位图，然后执行TableLayoutPanel.DrawToBitmap，但这似乎效率很低，并且由于我已经有Graphics对象可以进行打印，因此应该有一种简单的方法来进行此操作。谢谢！

编辑：我注意到有一个 ControlPaint.Draw__，但是它没有很多控件可以绘制（它具有Border，Button，CheckBox，ComboBox ）..

解决方案

  private static void PrintControl（Control control）
 { 
 var bitmap = new Bitmap（control.Width，control.Height）; 
 
 control.DrawToBitmap（位图，新Rectangle（0，0，control.Width，control.Height））; 
 
 var pd = new PrintDocument（）; 
 
 pd.PrintPage + =（s，e）=> e.Graphics.DrawImage（bitmap，100，100）; 
 pd.Print（）; 
} 
  

它仍在使用DrawToBitmap，但最优雅。 / p>

它非常简洁，可读且效率不高，所以我看不出有什么理由不喜欢它。

I was wondering if there is an easy way to print out any control in C# to a printer. My specific example is trying to print a TableLayoutPanel to a receipt (so i don't have to worry about page breaks or anything), but I would like the ability to print out any visible object that is sent to me. Right now I have to create a bitmap, and then do a TableLayoutPanel.DrawToBitmap, but this seems very inefficient and since I already have the Graphics object for printing, there should be an easy way to do this.. Thanks!

Edit: I have noticed that there's a "ControlPaint.Draw__", however it doesn't have a lot of controls it is able to draw (it has Border, Button, CheckBox, ComboBox)..

解决方案

private static void PrintControl(Control control)
{
    var bitmap = new Bitmap(control.Width, control.Height);

    control.DrawToBitmap(bitmap, new Rectangle(0, 0, control.Width, control.Height));

    var pd = new PrintDocument();

    pd.PrintPage += (s, e) => e.Graphics.DrawImage(bitmap, 100, 100);
    pd.Print();
}

It's still using DrawToBitmap, but it's most elegant you're gonna get.

It is pretty concise, readable and not inefficient, so I don't see any reason not to like it.

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