LineEventInfo Constructor(Table,String,String,String,String)

In This Topic

Initializes a new instance of the PointEventInfo class with an offset field.

Syntax

C#
Visual Basic (Declaration)

public LineEventInfo( 
   Table lineEventTable,
   string routeIDFieldName,
   string fromMeasureFieldName,
   string toMeasureFieldName,
   string offsetFieldName
)

Public Function New( _
   ByVal lineEventTable As Table, _
   ByVal routeIDFieldName As String, _
   ByVal fromMeasureFieldName As String, _
   ByVal toMeasureFieldName As String, _
   ByVal offsetFieldName As String _
)

Parameters

lineEventTable: The table that contains line events.
routeIDFieldName: The name of the field that contains the route identifier associated with each event.
fromMeasureFieldName: The name of the field that identifies where the event starts within the route.
toMeasureFieldName: The name of the field that identifies where the event ends within the route.
offsetFieldName: The name of the field that identifies the offset of the line event from the underlying route.

Exceptions

Exception	Description
System.ArgumentNullException	fromMeasureFieldName, toMeasureFieldName, or offsetFieldName is null.
System.ArgumentException	fromMeasureFieldName or toMeasureFieldName is empty.
ArcGIS.Core.Data.Exceptions.GeodatabaseException	A geodatabase-related exception has occurred.

Example

Create a RouteEventSource via dynamic segmentation process for line events

public void CreateLineEventSource(Geodatabase geodatabase, string routeFeatureClassName = "Roads", string eventTableName = "Accidents", string routeIdFieldName = "RID", string toMeasureFieldName = "toMeasure", string fromMeasureFieldName = "fromMeasure", string offsetFieldName = "Offset")
{
    using (FeatureClass routesFeatureClass = geodatabase.OpenDataset<FeatureClass>(routeFeatureClassName))
    using (Table eventsTable = geodatabase.OpenDataset<Table>(eventTableName))
    {
        RouteInfo routeInfo = new RouteInfo(routesFeatureClass, routeIdFieldName);
        EventInfo eventInfo = new LineEventInfo(eventsTable, routeIdFieldName, fromMeasureFieldName, toMeasureFieldName, offsetFieldName);
        RouteEventSourceOptions routeEventSourceOptions = new LineEventSourceOptions() { IsPositiveOffsetOnRight = true };

        using (RouteEventSource routeEventSource = new RouteEventSource(routeInfo, eventInfo, routeEventSourceOptions))
        using (RouteEventSourceDefinition routeEventSourceDefinition = routeEventSource.GetDefinition())
        {
            // Locating errors 
            IReadOnlyList<RouteEventSourceError> errors = routeEventSource.GetErrors();

            // Route event source fields 
            IReadOnlyList<Field> routeEventSourceFields = routeEventSourceDefinition.GetFields();

            // Add RouteEventSource to the ArcGIS Pro map
            FeatureLayerCreationParams layerParams = new FeatureLayerCreationParams(routeEventSource)
            {
                Name = "HighCrashAreas"
            };

            LayerFactory.Instance.CreateLayer<FeatureLayer>(layerParams, MapView.Active.Map);
        }
    }
}

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.3 or higher.

Reference

LineEventInfo Class
LineEventInfo Members
Overload List

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