1.打开对话框读取单张图

dev_open_file_dialog

2.图像显示不全

解决方案： HOperatorSet.SetPart(HTuple windowHandle, HTuple row1, HTuple column1, HTuple row2, HTuple column2)

windowHandle:窗体 

HTuple row1, HTuple column1,：左上角的行列坐标

HTuple row2, HTuple column2：右下角的行列坐标

 hv_Width.Dispose(); hv_Height.Dispose();
 HOperatorSet.GetImageSize(ho_Image, out hv_Width, out hv_Height);//获取图像的宽高
 //显示**所在区域

 HOperatorSet.SetDraw(hWindowControl1.HalconWindow, "margin");        
 HOperatorSet.SetLineWidth(hWindowControl1.HalconWindow, 3);
 HOperatorSet.SetPart(hWindowControl1.HalconWindow, 0, 0, hv_Width, hv_Height);

效果：