在 C# 中打印 Windows 窗体
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/13821715/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Print Windows form in c#
提问by Max
I am trying to print a form using this code:
我正在尝试使用以下代码打印表单：
private void btnPrint_Click(object sender, EventArgs e)
{
Graphics g1 = this.CreateGraphics();
Image MyImage = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Height, g1);
Graphics g2 = Graphics.FromImage(MyImage);
IntPtr dc1 = g1.GetHdc();
IntPtr dc2 = g2.GetHdc();
BitBlt(dc2, 0, 0, this.ClientRectangle.Width, this.ClientRectangle.Height, dc1, 0, 0, 13369376);
g1.ReleaseHdc(dc1);
g2.ReleaseHdc(dc2);
MyImage.Save(@"c:\PrintPage.jpg", ImageFormat.Jpeg);
FileStream fileStream = new FileStream(@"c:\PrintPage.jpg", FileMode.Open, FileAccess.Read);
StartPrint(fileStream, "Image");
fileStream.Close();
if (System.IO.File.Exists(@"c:\PrintPage.jpg"))
{
System.IO.File.Delete(@"c:\PrintPage.jpg");
}
}
But is gives me an error at: MyImage.Save.
但它给了我一个错误：MyImage.Save。
The error:
错误：
ExternalException was Unhandled: A generic error occurred in GDI+.
ExternalException 未处理：GDI+ 中发生一般错误。
Can someone give me a fix for this problem,and explain, why I'am getting this error?
有人可以解决这个问题，并解释一下，为什么我会收到这个错误？
Thanks in Advance!
提前致谢！
采纳答案by sanjeev
private void btn_print_Click(object sender, EventArgs e)
{
CaptureScreen();
printDocument1.Print();
printDocument1.PrintPage += new PrintPageEventHandler(printDocument1_PrintPage);
}
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);
memoryGraphics.CopyFromScreen(this.Location.X, this.Location.Y, 0, 0, s);
}
private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
}
private void printDocument1_PrintPage_1(object sender, PrintPageEventArgs e)
{
e.Graphics.DrawImage(memoryImage, 0, 0);
}
Add a print_document by dragging it from the toolbox to form. Execute this code, it will work fine.
通过将其从工具箱拖动到表单来添加一个 print_document。执行此代码，它将正常工作。
http://csharpprobsandsoln.blogspot.in/2013/04/print-windows-form-in-c.html
http://csharpprobsandsoln.blogspot.in/2013/04/print-windows-form-in-c.html
回答by toni robinson
回答by Sergey
I had the same task and I have created a class (like printable form). All you have to do is to inherit your Form from that class and call PrintForm(); method. Here is the class:
我有同样的任务，我创建了一个类（如可打印表单）。你所要做的就是从那个类继承你的 Form 并调用 PrintForm(); 方法。这是课程：
public class CustomForm : Form
{
protected Bitmap _prnImage;
protected PrintPreviewDialog _prnpreviewdlg = new PrintPreviewDialog();
protected PrintDocument _printdoc = new PrintDocument();
public CustomForm()
{
_printdoc.PrintPage += new PrintPageEventHandler(printdoc_PrintPage);
}
protected void PrintForm()
{
Form form = this;
_prnImage = new Bitmap(form.Width, form.Height);
form.DrawToBitmap(_prnImage, new Rectangle(0, 0, form.Width, form.Height));
_printdoc.DefaultPageSettings.Landscape = true;
_printdoc.DefaultPageSettings.Margins = new Margins(10, 10, 10, 10);
_prnpreviewdlg.Document = _printdoc;
_prnpreviewdlg.ShowDialog();
}
protected void printdoc_PrintPage(object sender, PrintPageEventArgs e)
{
Rectangle pagearea = e.PageBounds;
e.Graphics.DrawImage(_prnImage, e.MarginBounds);
}
protected override void OnPaint(PaintEventArgs e)
{
if (_prnImage != null)
{
e.Graphics.DrawImage(_prnImage, 0, 0);
base.OnPaint(e);
}
}
}
I understand that interface is a more academic and correct way to do that but in my particular case that solution satisfied me.
我知道接口是一种更加学术和正确的方式来做到这一点，但在我的特殊情况下，该解决方案让我满意。
