在本例中，創建一個命令，實現刪除所選中的尺寸標注。

#region Namespaces using System; using System.Collections.Generic; using System.Diagnostics; using Autodesk.Revit.ApplicationServices; using Autodesk.Revit.Attributes; using Autodesk.Revit.DB; using Autodesk.Revit.UI; using Autodesk.Revit.UI.Selection; #endregionnamespace DeleteDimensions {[Autodesk.Revit.Attributes.Transaction(TransactionMode.Manual)][Autodesk.Revit.Attributes.Regeneration(RegenerationOption.Manual)][Autodesk.Revit.Attributes.Journaling(JournalingMode.NoCommandData)]public class Command : IExternalCommand{public Result Execute(ExternalCommandData commandData,ref string message,ElementSet elements){ElementSet selections = commandData.Application.ActiveUIDocument.Selection.Elements;ElementSet dimsToDelete = new ElementSet();if (0 == selections.Size){message = "Please select dimensions";return Result.Failed;}foreach (Element e in selections){Dimension dimensionTemp = e as Dimension;if (null != dimensionTemp && !dimensionTemp.Pinned){dimsToDelete.Insert(dimensionTemp);}}if (0 == dimsToDelete.Size){message = "There are no unpinned dimensions currently selected";return Result.Failed;}Transaction transation = new Transaction(commandData.Application.ActiveUIDocument.Document, "External Tool");transation.Start();foreach (Element e in dimsToDelete){commandData.Application.ActiveUIDocument.Document.Delete(e.Id);}transation.Commit();return Result.Succeeded;}} }

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