/// <summary>
/// 预览按钮处理。
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Preview(object sender, RoutedEventArgs e)
{
try
{
// 生成边坡实体集合，按实体边界获取截取窗口。
previewEnts = MakeBianpo(view);
var extents = new AcDb.Extents3d();
foreach (var ent in previewEnts.OfType <AcDb.Curve>())
{
extents.AddExtents(ent.GeometricExtents);
}
previewExtents = extents;
// 生成Bitmap，显示到界面的图片上。
using (var bitmap = GraphicHelper.Snapshort(previewEnts,
kPreviewImageWidth, kPreviewImageHeight,
previewExtents.MinPoint, previewExtents.MaxPoint))
{
ShowImage(bitmap);
}
}
catch (Exception ex)
{
ShowError(ex);
}
}
