源码如下：
#region 保存纵断面截图
private void button_save_Click(object sender , EventArgs e)
{
SaveFileDialog saveImageDialog = new SaveFileDialog();
saveImageDialog.Title = "保存纵断面图";
saveImageDialog.DefaultExt = ".png";
saveImageDialog.FileName = Linefeaturelayer.Name + "纵断面图";
saveImageDialog.InitialDirectory = "C:\\";
DialogResult dr = saveImageDialog.ShowDialog();
if (dr==DialogResult.OK)
{
CaptureImage(saveImageDialog.FileName);
MessageBox.Show("保存成功！");
}
}
private void CaptureImage(string path)
{
try
{
//获得当前屏幕的大小
Rectangle rect = new Rectangle();
rect = Screen.GetWorkingArea(this);
//创建一个以当前屏幕为模板的图象
Graphics g1 = this.CreateGraphics();
//创建以屏幕大小为标准的位图
Image MyImage = new Bitmap(rect.Width , rect.Height , g1);
Graphics g2 = Graphics.FromImage(MyImage);
//得到屏幕的DC
IntPtr dc1 = g1.GetHdc();
//得到Bitmap的DC
IntPtr dc2 = g2.GetHdc();
//调用此API函数，实现屏幕捕获
BitBlt(dc2 , 0 , 0 , rect.Width , rect.Height , dc1 , 0 , 0 , 13369376);
//释放掉屏幕的DC
g1.ReleaseHdc(dc1);
//释放掉Bitmap的DC
g2.ReleaseHdc(dc2);
//以JPG文件格式来保存
MyImage.Save(path , ImageFormat.Png);
}
catch (System.Exception ex)
{
MessageBox.Show(ex.Message + " 保存图片失败！");
}
}
//声明一个API函数
[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
private static extern bool BitBlt(
IntPtr hdcDest , // 目标 DC的句柄
int nXDest ,
int nYDest ,
int nWidth ,
int nHeight ,
IntPtr hdcSrc , // 源DC的句柄
int nXSrc ,
int nYSrc ,
System.Int32 dwRop // 光栅的处理数值
);
#endregion
效果图：