ArcGIS Enterprise SDK

ILine Interface

Provides access to members that identify a straight line segment and defines its properties.

Name |
Description | |
---|---|---|

Angle | The angle between this line and the positive x-axis. | |

Dimension | The topological dimension of this geometry. | |

Envelope | Creates a copy of this geometry's envelope and returns it. | |

FromPoint | The 'from' point of the curve. | |

GeometryType | The type of this geometry. | |

GeoNormalize | Shifts longitudes, if need be, into a continuous range of 360 degrees. | |

GeoNormalizeFromLongitude | Normalizes longitudes into a continuous range containing the longitude. This method is obsolete. | |

GetSubcurve | Extracts a portion of this curve into a new curve. | |

IsClosed | Indicates if 'from' and 'to' points (of each part) are identical. | |

IsEmpty | Indicates whether this geometry contains any points. | |

Length | The length of the curve. | |

Project | Projects this geometry into a new spatial reference. | |

PutCoords | Sets this line's endpoints to be 'from' and 'to'. | |

QueryCoords | Copies the endpoints of this line to 'from' and 'to'. | |

QueryEnvelope | Copies this geometry's envelope properties into the specified envelope. | |

QueryFromPoint | Copies this curve's 'from' point to the input point. | |

QueryNormal | Constructs a line normal to a curve from a point at a specified distance along the curve. | |

QueryPoint | Copies to outPoint the properties of a point on the curve at a specified distance from the beginning of the curve. | |

QueryPointAndDistance | Finds the point on the curve closest to inPoint, then copies that point to outPoint; optionally calculates related items. | |

QueryTangent | Constructs a line tangent to a curve from a point at a specified distance along the curve. | |

QueryToPoint | Copies the curve's 'to' point into the input point. | |

ReverseOrientation | Reverses the parameterization of the curve ('from' point becomes 'to' point, first segment becomes last segment, etc). | |

SetEmpty | Removes all points from this geometry. | |

SnapToSpatialReference | Moves points of this geometry so that they can be represented in the precision of the geometry's associated spatial reference system. | |

SpatialReference | The spatial reference associated with this geometry. | |

ToPoint | The 'to' point of the curve. |

Interfaces | Description |
---|---|

ICurve | Provides access to properties and methods of all 1 dimensional curves (polylines, segments, boundaries of polygons, etc.). |

IGeometry | Provides access to members that describe properties and behavior of all geometric objects. |

Classes | Description |
---|---|

Line | A 2D straight line between a pair of 2D endpoints; can optionally have height, measure and ID attributes at each endpoint. |

The **PutCoords** method requires 2 Point objects to construct the line segment.

[C#]

// This example creates a simple line and gets the angle

// and the start and endpoint.

public void ShowLineAngle()

{

IPoint fromPoint = new PointClass();

fromPoint.PutCoords(100, 100);

IPoint toPoint = new PointClass();

toPoint.PutCoords(150, 150);

ILine line = new LineClass();

line.PutCoords(fromPoint, toPoint);

double angle = line.Angle;

//query Coordinats

IPoint outFromPoint = new PointClass();

IPoint outToPoint = new PointClass();

line.QueryCoords(outFromPoint, outToPoint);

System.Windows.Forms.MessageBox.Show("From X = " + outFromPoint.X +

", From Y = " + outFromPoint.Y + "\n" +

"To X = " + outToPoint.X +

", To Y = " + outToPoint.Y + "\n" +

"Angle = " + angle);

}