寻找停止位图预览的想法
寻找有关如何在工作时间过长时停止此预览代码的想法。它似乎很难处理一些图纸。BlockTable bt = (BlockTable)tr.GetObject(OuterDB.BlockTableId, OpenMode.ForRead);
BlockTableRecord blk = (BlockTableRecord)tr.GetObject(bt["*Model_Space"], OpenMode.ForRead);
var imgsrc = Autodesk.AutoCAD.Windows.Data.CMLContentSearchPreviews.GetBlockTRThumbnail(blk);
var bmp = ImageSourceToGDI(imgsrc as System.Windows.Media.Imaging.BitmapSource);
pictureBox1.Image = bmp as System.Drawing.Bitmap;
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