private void pictureBox1_Click(object sender, EventArgs e)
{
////实例化打印对象
PrintDocument print = new PrintDocument();
//打印事件
print.PrintPage += new PrintPageEventHandler(print_PrintPage);
//开始打印
PrintDialog pd = new PrintDialog();
if (pd.ShowDialog() == DialogResult.OK)
{
//print.PrinterSettings.DefaultPageSettings.Landscape = true;
print.Print();
}
//打印之后删除保存在本地的图片
print.EndPrint += new PrintEventHandler(print_EndPrint);
}
/// <summary>
/// LabHemodialysis产生的图保存的本地，并且获取
/// </summary>
/// <returns></returns>
private Image get_Image() {
Bitmap bmp;
if (str_ItemName.Contains("/"))
{
string str_ItemNameRelapce = str_ItemName.Replace("/", "");
LabHemodialysis.ExportToImage(@"C:\" + str_ItemNameRelapce + ".Jpeg", System.Drawing.Imaging.ImageFormat.Jpeg);
bmp = new Bitmap(@"C:\" + str_ItemNameRelapce + ".Jpeg");
}
else {
//保存到c盘
LabHemodialysis.ExportToImage(@"C:\" + str_ItemName + ".Jpeg", System.Drawing.Imaging.ImageFormat.Jpeg);
//从c盘获取图片
bmp = new Bitmap(@"C:\" + str_ItemName + ".Jpeg");
}
return bmp;
}
//删除本地保存的图片
private void delete_Image()
{
System.IO.FileInfo file = new System.IO.FileInfo(@"C:\" + str_ItemName + ".Jpeg");
if (file.Exists)
{
file.Delete();
}
}
private void print_EndPrint(object sender, PrintEventArgs e)
{
delete_Image();
}
private void print_PrintPage(object sender, PrintPageEventArgs e)
{
Image img = get_Image();
Image rotataImage = Rotate((Bitmap)img, 90);
e.Graphics.DrawImage(rotataImage,0,0);
}
/// <summary>
/// 以逆时针为方向对图像进行旋转
/// </summary>
/// <param name="b">位图流</param>
/// <param name="angle">旋转角度[0,360](前台给的)</param>
/// <returns></returns>
private Bitmap Rotate(Bitmap b, int angle)
{
angle = angle % 360;
//弧度转换
double radian = angle * Math.PI / 180.0;
double cos = Math.Cos(radian);
double sin = Math.Sin(radian);
//原图的宽和高
int w = b.Width;
int h = b.Height;
int W = (int)(Math.Max(Math.Abs(w * cos - h * sin), Math.Abs(w * cos + h * sin)));
int H = (int)(Math.Max(Math.Abs(w * sin - h * cos), Math.Abs(w * sin + h * cos)));
//目标位图
Bitmap dsImage = new Bitmap(W, H);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(dsImage);
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.Bilinear;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//计算偏移量
Point Offset = new Point((W - w) / 2, (H - h) / 2);
//构造图像显示区域：让图像的中心与窗口的中心点一致
Rectangle rect = new Rectangle(Offset.X, Offset.Y, w, h);
Point center = new Point(rect.X + rect.Width / 2, rect.Y + rect.Height / 2);
g.TranslateTransform(center.X, center.Y);
g.RotateTransform(360 - angle);
//恢复图像在水平和垂直方向的平移
g.TranslateTransform(-center.X, -center.Y);
g.DrawImage(b, rect);
//重至绘图的所有变换
g.ResetTransform();
g.Save();
g.Dispose();
//dsImage.Save("yuancd.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
return dsImage;
}
private string printName;//打印的名称
private void boxSava_Click(object sender, EventArgs e)
{
SaveFileDialog sf = new SaveFileDialog();
sf.Filter = "Image files(*.jpeg,*.gif)|*.jpeg;*.gif";
sf.Title = "趋势图导出";
sf.FileName = str_ItemName+"("+DateTime.Now+")"+"趋势图";
printName = sf.FileName;
if (sf.ShowDialog() == DialogResult.OK)
{
LabHemodialysis.ExportToImage(sf.FileName, System.Drawing.Imaging.ImageFormat.Jpeg);
}
}
