c# 我想把panel旋转90度后打印！！？？？

Question

大家好，我想在C#中把panel的内容全部旋转90度后打印，该如何处理？？？？？

Answer 1

把panel1里的内容旋转90度保存图片打印
[System.Runtime.InteropServices.DllImportAttribute( "gdi32.dll ")] 
                         private   static   extern   bool   BitBlt( 
                                        IntPtr   hdcDest,   //   handle   to   destination   DC 
                                        int   nXDest,   //   x-coord   of   destination   upper-left   corner 
                                        int   nYDest,   //   y-coord   of   destination   upper-left   corner 
                                        int   nWidth,   //   width   of   destination   rectangle 
                                        int   nHeight,   //   height   of   destination   rectangle 
                                        IntPtr   hdcSrc,   //   handle   to   source   DC 
                                        int   nXSrc,   //   x-coordinate   of   source   upper-left   corner 
                                        int   nYSrc,   //   y-coordinate   of   source   upper-left   corner 
                                        System.Int32   dwRop   //   raster   operation   code 
                         ); 
        private void button1_Click(object sender, EventArgs e)
        {
            Graphics g1 = panel1.CreateGraphics();
            Image myImage = new Bitmap(this.panel1.Width, this.panel1.Height, g1);
            Graphics g2 = Graphics.FromImage(myImage);
            IntPtr dc1 = g1.GetHdc();
            IntPtr dc2 = g2.GetHdc();
            BitBlt(dc2, 0, 0, this.panel1.Width, this.panel1.Height, dc1, 0, 0, 13369376);
            g1.ReleaseHdc(dc1);
            g2.ReleaseHdc(dc2);
            myImage.RotateFlip(RotateFlipType.Rotate90FlipNone);
            myImage.Save("c:\\a.jpg");            g1.Dispose();        }

Answer 2

如果不保存图像直接打印，你可以把myImage对象传给PrintDocument
然后直接打印出myImage

Answer 3

C#代码：请参考执行。[System.Runtime.InteropServices.DllImportAttribute( "gdi32.dll ")] 
                         private   static   extern   bool   BitBlt( 
                                        IntPtr   hdcDest,   //   handle   to   destination   DC 
                                        int   nXDest,   //   x-coord   of   destination   upper-left   corner 
                                        int   nYDest,   //   y-coord   of   destination   upper-left   corner 
                                        int   nWidth,   //   width   of   destination   rectangle 
                                        int   nHeight,   //   height   of   destination   rectangle 
                                        IntPtr   hdcSrc,   //   handle   to   source   DC 
                                        int   nXSrc,   //   x-coordinate   of   source   upper-left   corner 
                                        int   nYSrc,   //   y-coordinate   of   source   upper-left   corner 
                                        System.Int32   dwRop   //   raster   operation   code 
                         ); 
        private void button1_Click(object sender, EventArgs e)
        {
            Graphics g1 = panel1.CreateGraphics();
            Image myImage = new Bitmap(this.panel1.Width, this.panel1.Height, g1);
            Graphics g2 = Graphics.FromImage(myImage);
            IntPtr dc1 = g1.GetHdc();
            IntPtr dc2 = g2.GetHdc();
            BitBlt(dc2, 0, 0, this.panel1.Width, this.panel1.Height, dc1, 0, 0, 13369376);
            g1.ReleaseHdc(dc1);
            g2.ReleaseHdc(dc2);
            myImage.RotateFlip(RotateFlipType.Rotate90FlipNone);
            myImage.Save("c:\\a.jpg");            g1.Dispose();        }

Answer 4

TO gxingmin:这样保存下来的a。jpg怎么是空的，看不到panel上面的控件

Answer 5

下面是我的代码：           Graphics graphic = panel2.CreateGraphics();
            Size s = panel2.Size;
            Bitmap memImage = new Bitmap(s.Width, s.Height, graphic);
            Graphics memGraphic = Graphics.FromImage(memImage);           
            IntPtr dc1 = graphic.GetHdc();
            IntPtr dc2 = memGraphic.GetHdc();
            BitBlt(dc2, 0, 0, panel2.Width, panel2.Height,dc1, 0, 0, 13369376);
           
            memoryImage = (Bitmap)memImage.Clone();            graphic.ReleaseHdc(dc1);
            memGraphic.ReleaseHdc(dc2);
            graphic.Dispose();
            memGraphic.Dispose();
            memImage.Dispose();
            //*****************************
            PageSetupDialog mypgDialog = new PageSetupDialog();
            mypgDialog.Document = printDocument1;
            try
            {
                mypgDialog.ShowDialog();
            }
            catch
            {
                printDocument1.PrintController.OnEndPrint(printDocument1, new System.Drawing.Printing.PrintEventArgs());
            }
            //*****************************            PrintPreviewDialog dlg = new PrintPreviewDialog();
            
            dlg.Document = printDocument1;           
            dlg.Document.DefaultPageSettings.PaperSize = new System.Drawing.Printing.PaperSize("cardc", 324, 204);  
   
            if (dlg.ShowDialog() == DialogResult.OK)
            {            
                printDocument1.Print();
            }

Answer 6

不会啊，我保存下来图片有各种控件啊，panel里什么样，保存下来就什么（只不过旋转了90度）

Answer 7

TO gxingmin;请帮我看看我的代码是否有问题？

Answer 8

看你代码，没打印memImage啊
在打印之前不要把memImage释放掉

Answer 9

有这么一句 
memoryImage = (Bitmap)memImage.Clone();

Answer 10

你用这段代码看看效果
Bitmap myImage;
        private void button1_Click(object sender, EventArgs e)
        {
            Graphics g1 = panel1.CreateGraphics();
            myImage = new Bitmap(this.panel1.Width, this.panel1.Height, g1);
            Graphics g2 = Graphics.FromImage(myImage);
            IntPtr dc1 = g1.GetHdc();
            IntPtr dc2 = g2.GetHdc();
            BitBlt(dc2, 0, 0, this.panel1.Width, this.panel1.Height, dc1, 0, 0, 13369376);
            g1.ReleaseHdc(dc1);
            g2.ReleaseHdc(dc2);
            myImage.RotateFlip(RotateFlipType.Rotate90FlipNone);            PageSetupDialog mypgDialog = new PageSetupDialog();
            mypgDialog.Document = printDocument1;            try
            {
                mypgDialog.ShowDialog();
            }
            catch
            {
                printDocument1.PrintController.OnEndPrint(printDocument1, new System.Drawing.Printing.PrintEventArgs());
            }
            //*****************************            PrintPreviewDialog dlg = new PrintPreviewDialog();            dlg.Document = printDocument1;
            dlg.Document.DefaultPageSettings.PaperSize = new System.Drawing.Printing.PaperSize("cardc", 324, 204);            if (dlg.ShowDialog() == DialogResult.OK)
            {
                printDocument1.Print();
            }            g1.Dispose();        }      
        private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
        {
            e.Graphics.DrawImage(myImage, new Point(10, 10));
        }