c#抓屏（截屏）

先是给大家一个类:
    class ScreenShot
    {
        public static void CaptureImage(Point SourcePoint, Point DestinationPoint, Rectangle SelectionRectangle, string FilePath)
        {
            using (Bitmap bitmap = new Bitmap(SelectionRectangle.Width, SelectionRectangle.Height))
            {
                using (Graphics g = Graphics.FromImage(bitmap))
                {
                    g.CopyFromScreen(SourcePoint, DestinationPoint, SelectionRectangle.Size);
                }
                bitmap.Save(FilePath, ImageFormat.Bmp);
            }
        }
    }
     所需添加引用如下:
using System;
using System.Drawing;
using System.Drawing.Imaging;
     调用方法:
        private void button1_Click(object sender, EventArgs e)
        {
            saveFileDialog1.DefaultExt = "bmp";
            saveFileDialog1.Filter = "bmp files (*.bmp)|*.bmp";
            saveFileDialog1.Title = "导出地图为...";
            saveFileDialog1.ShowDialog();
            if (saveFileDialog1.FileName.Length > 0)
            {
                ScreenPath = saveFileDialog1.FileName;
            }
            else
            {
                return;
            }
            this.Refresh();
            //3个参数：获得控件所在屏幕坐标，目标坐标点为(0,0)，获得控件大小。
            ScreenShot.CaptureImage(axMapControl1.PointToScreen(Point.Empty), Point.Empty, new Rectangle(axMapControl1.Location, axMapControl1.Size), ScreenPath);       
        }