C#打印控件内容，控件快照

        private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)        {            Bitmap map = new Bitmap(this.panel1.Width, this.panel1.Height);            this.panel1.DrawToBitmap(map, new Rectangle(0, 0, this.panel1.Width, this.panel1.Height));            e.Graphics.DrawImage(map, 0, 0, this.panel1.Width, this.panel1.Height);        }          this.pageSetupDialog1.Document = this.printDocument1;            this.pageSetupDialog1.ShowDialog();