ArcObjects Library Reference (Editor)  

IDistanceConverter Interface

Provides access to methods that allow a distance to be converted from one unit system to another.

Product Availability

Available with ArcGIS Desktop.

Members

Description
Method GetValue Converts the string value to a double.

CoClasses that implement IDistanceConverter

CoClasses and Classes Description
DistanceConverter Converts distance values from one unit to another.
[C#] 
/// 
/// IDistanceConverter example that shows how to convert a distance string
/// to another linear unit.
/// NOTE: Only projected coordinates systems will work
/// 
public void ConvertDistance()
{
    IDistanceConverter distanceConverter = new DistanceConverter();
    // IDistanceConverter::GetValue requires a spatial reference
    //Get the spatial reference required from the current map
    UID editorUID = new UIDClass();
    editorUID.Value = "esriEditor.Editor";
    IEditor editor = m_application.FindExtensionByCLSID(editorUID) as IEditor;
    ISpatialReference spatialReference = editor.Map.SpatialReference;
    //convert
    distanceConverter.GetValue("150 ft", spatialReference);
    System.Windows.Forms.MessageBox.Show("" +(distanceConverter.GetValue("150 ft", spatialReference)));
    // Create an arbitrary SpatialReference, the only important part is the
    // linear units
    ISpatialReferenceFactory2 spatialReferenceFactory = new SpatialReferenceEnvironment() as ISpatialReferenceFactory2;
    IProjectedCoordinateSystem projectedCoordinateSystem = spatialReferenceFactory.CreateProjectedCoordinateSystem((int)esriSRProjCSType.esriSRProjCS_WGS1984UTM_10N);
    ILinearUnit linearUnit = spatialReferenceFactory.CreateUnit((int)esriSRUnitType.esriSRUnit_Foot) as ILinearUnit;
    IProjectedCoordinateSystemEdit projectedCoordinateSystemEdit = projectedCoordinateSystem as IProjectedCoordinateSystemEdit;
    //overhead casts
    object linearUnitObject = linearUnit;
    object missing = Type.Missing;
    projectedCoordinateSystemEdit.Define(ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref linearUnitObject, ref missing, ref missing);
    spatialReference = projectedCoordinateSystem;
    System.Windows.Forms.MessageBox.Show("" + (distanceConverter.GetValue("100m", spatialReference)));
}