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This document is archived and information here might be outdated. Recommended version. |
XYEventSource Class (ArcObjects .NET 10.8 SDK)
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This document is archived and information here might be outdated. Recommended version. |
XY event source object.
| Interfaces | Description |
|---|---|
| IClass | Provides access to members that return information about and manage the class. |
| IDataset | Provides access to members that supply dataset information. |
| IDatasetEdit | Provides access to information about the status of datasets being edited. |
| IDatasetEditInfo | Provides access to members that maintain dataset editing information. |
| IEventSource | Provides access to event source properties. |
| IFeatureClass | Provides access to members that control the behavior and properties of a feature class. |
| IGeoDataset | Provides access to members that provide information about a Geographic Dataset. |
| IObjectClass | Provides access to members that return information about an object class. |
| IObjectClassEvents | Provides access to events that occur with an object class. |
| IObjectClassInfo | Provides access to method that indicates whether an object can bypass the store method. |
| IObjectClassInfo2 | Provides access to method that indicates whether an object can be modified outside of an edit session. |
| IObjectClassSchemaEvents | Provides access to events that occur with an object class' schema. |
| ISubtypes | Provides access to members that return and modify subtype information. |
| ITable | Provides access to members that return information about and manage tables. |
| ITableCapabilities | Provides access to members that return information about and manage tables. |
| IVirtualTable | Indicator interface that identifies temporary memory tables. |
| IXYEventSource | Provides access to members that allow interaction with an existing XY Event Layer. |
A table that contains a field with X coordinates and a field with Y coordinates can be used to dynamically create a point feature class. The feature class is dynamic in that the shapes are generated as needed from data in a source table rather than accessed from a physical data source. The source table that contains the coordinates is called the XY event table.
The XYEventSource class generates a dynamic featureclass from an XY event table. A point, based on the coordinates in the fields specified by XYEvent2FieldsProperties, is created for each row in the XY event table.
In order to create an XYEventSource, you must first create an XYEventSourceName. Since XYEventSource inherits from FeatureClass, it implements the same interfaces and can be treated like any other point feature class. It can be added to ArcMap as a point feature layer and even edited directly with the editor.
There may be some limitations imposed by the XY event table, however. For example, you will not be able to directly edit a feature class created from a delimited text file table since the editor doesn't allow text files to be edited directly. Also, you cannot add or move points using the tools in the editor toolbar. To add or move points, you must edit the coordinates or add new records to the table.
IXYEventSourceName Interface | IXYEvent2FieldsProperties Interface