CAD插入jpg

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private void InsertImage()         {             OpenFileDialog ofd = new OpenFileDialog();             ofd.Filter = "jpg 文件(*.jgp)|*.jpg";               if (ofd.ShowDialog() != DialogResult.OK)             {                 return;                 }               Image tmpImage = null;             try             {                 tmpImage = Image.FromFile(ofd.FileName);             }             catch(Exception exp)             {                 MessageBox.Show(exp.Message);                 return;             }               if (tmpImage == null)                 return;               double dW = tmpImage.Width;             double dH = tmpImage.Height;             tmpImage = null;               // 图片文件的插入点。             MxDrawPoint point = (MxDrawPoint)(axMxDrawX1.GetPoint(false,0,0, "\n 指定插入点:") );             if (point == null)                 return;                 string sFilePath = ofd.FileName;             string sFileName = sFilePath;                 MxDrawDatabase   database = (MxDrawDatabase)(axMxDrawX1.GetDatabase() );             MxDrawDictionary dict = database.GetNamedObjectsDictionary();             if (dict == null)                 return;               MxDrawDictionary imageDict = (MxDrawDictionary)(dict.GetAt("ACAD_IMAGE_DICT", false) );             if(imageDict == null)             {                 // 增加一个字典对象。                 imageDict = (MxDrawDictionary)(dict.AddObject("ACAD_IMAGE_DICT", "McDbDictionary") );             }               if (imageDict == null)                 return;               MxDrawRasterImageDef imgedef = (MxDrawRasterImageDef)(imageDict.GetAt(sFileName, false) );             if(imgedef == null)             {                 imgedef = (MxDrawRasterImageDef)(imageDict.AddObject(sFileName, "McDbRasterImageDef"));                 if (imgedef == null)                     return;             }             imgedef.SourceFileName = sFileName;               MxDrawBlockTableRecord curSpace = database.CurrentSpace();             MxDrawVector3d uCorner = new MxDrawVector3d();             uCorner.x  = dW;               MxDrawVector3d vOnPlane = new MxDrawVector3d();             vOnPlane.y = dH;               curSpace.AddImage(point.x,point.y,uCorner.x,uCorner.y, vOnPlane.x,vOnPlane.y, imgedef.ObjectID);               MxDrawApplication app = new MxDrawApplication();             app.ZoomAll();         }