private void btn_restore_Click(object sender, EventArgs e) { try { curBitmap = (Bitmap)Image.FromFile(curFileName); //实例化类 pointbmp = new PointBitmap(curBitmap); imageProcessing = new ImageProcessing(curBitmap); } catch (Exception exp) { MessageBox.Show(exp.Message); } Invalidate(); }
private void btn_open_Click(object sender, EventArgs e) { //创建OpenFileDialog OpenFileDialog opnDlg = new OpenFileDialog(); //为图像选择一个筛选器 opnDlg.Filter = "所有图像文件|*.bmp;*.pcx;*.png;*.jpg;*.gif;" + "*.tif;*.ico;*.dxf;*.cgm;*.cdr;*.wmf;*.eps;*.emf|" + "位图(*.bmp;*.jpg;*.png;...)|*.bmp;*.pcx;*.png;*.jpg;*.gif;*.tif;*.ico|" + "矢量图(*.wmf;*.eps;*.emf;...)|*.dxf;*.cgm;*.cdr;*.wmf;*.eps;*.emf"; //设置对话框标题 opnDlg.Title = "打开图像文件"; //启用“帮助”按钮 opnDlg.ShowHelp = true; //如果结果为“打开”,选定文件 if (opnDlg.ShowDialog() == DialogResult.OK) { //读取当前选中的文件名 curFileName = opnDlg.FileName; //使用Image.FromFile创建图像对象 try { //防止连续打开文件造成内存不足,每次赋值之前把上次的值清空 if (curBitmap != null) { curBitmap.Dispose(); } curBitmap = (Bitmap)Image.FromFile(curFileName); //实例化类 pointbmp = new PointBitmap(curBitmap); imageProcessing = new ImageProcessing(curBitmap); } catch (Exception exp) { MessageBox.Show(exp.Message); } } //对窗体进行重新绘制,这将强制执行paint事件处理程序 Invalidate(); }