在C#中,我在表单上有一个面板,我要打印的内容。面板的内容是来自DrawLines
方法的行。
目前我无法在打印预览中查看或打印面板上的线条。面板的边框确实出现了。
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
panel1.CreateGraphics().DrawLines(new Pen(Color.Black),
new Point[]{new Point(10,10),new Point(50,50)});
}
private void PrintPanel(Panel pnl)
{
PrintDialog myPrintDialog = new PrintDialog();
PrinterSettings values;
values = myPrintDialog.PrinterSettings;
myPrintDialog.Document = printDocument1;
printDocument1.PrintController = new StandardPrintController();
printDocument1.PrintPage +=
new System.Drawing.Printing.PrintPageEventHandler(printDocument1_PrintPage);
printPreviewDialog1.Document = printDocument1;
printPreviewDialog1.ShowDialog();
//printDocument1.Print();
printDocument1.Dispose();
}
void printDocument1_PrintPage(object sender, PrintPageEventArgs e)
{
Bitmap bmp = new Bitmap(panel1.Width, panel1.Height);
panel1.DrawToBitmap(bmp, new Rectangle(0, 0, panel1.Width, panel1.Height));
e.Graphics.DrawImage(bmp, panel1.Width, panel1.Height);
}
为什么面板中的线条没有显示在打印预览或打印中?
答案 0 :(得分:1)
我想你错过了这个。需要将图形传递到位图
Bitmap bmp = new Bitmap(Panel1.Width, Panel1.Height, Panel1.CreateGraphics());
答案 1 :(得分:-1)
这是因为您以错误的方式使用CreateGraphics
并且您的抽奖意外已清除,请尝试在Paint
事件处理程序中为您的panel1
绘制内容像这样:
//Paint event handler for your panel1
private void panel1_Paint(object sender, PaintEventArgs e){
e.Graphics.DrawLines(Pens.Black, new Point[]{new Point(10,10),new Point(50,50)});
}