Dimension.md

Dimension Class

Overview

The Dimension class is the base class for all dimension entities in AutoCAD including linear, aligned, rotated, angular, radial, and diameter dimensions.

Namespace

Autodesk.AutoCAD.DatabaseServices

Inheritance Hierarchy

System.Object
  └─ RXObject
      └─ DBObject
          └─ Entity
              └─ Dimension
                  ├─ AlignedDimension
                  ├─ RotatedDimension
                  ├─ RadialDimension
                  ├─ DiametricDimension
                  └─ AngularDimension

Key Properties

Property	Type	Description
DimensionText	string	Gets/sets the dimension text override
Measurement	double	Gets the measured value
DimensionStyle	ObjectId	Gets/sets the dimension style
TextPosition	Point3d	Gets/sets the text position
TextRotation	double	Gets/sets the text rotation

Code Examples

Example 1: Creating an Aligned Dimension

using (Transaction tr = db.TransactionManager.StartTransaction())
{
    BlockTableRecord btr = tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite) as BlockTableRecord;
    
    Point3d pt1 = new Point3d(0, 0, 0);
    Point3d pt2 = new Point3d(100, 50, 0);
    Point3d dimLinePoint = new Point3d(50, 75, 0);
    
    AlignedDimension dim = new AlignedDimension(pt1, pt2, dimLinePoint, "", db.Dimstyle);
    
    btr.AppendEntity(dim);
    tr.AddNewlyCreatedDBObject(dim, true);
    
    tr.Commit();
}

Related Objects

• Entity - Base class
• DimStyleTable - Dimension styles

References

• Autodesk Official Documentation