IUniqueValueRenderer Interface

Provides access to members that control a renderer where symbols are assigned to features based on unique attribute values.

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Description

Members

	All Properties Methods	Description
	AddReferenceValue	Adds a value to the renderer to be grouped with refValue, which has already been added to the renderer.
	AddValue	Adds a value and corresponding symbol to the list. For multivariate cases, the specified value is a delimitted list of individual values.
	ColorScheme	Color scheme (user interface property only).
	DefaultLabel	Label used for unspecified values.
	DefaultSymbol	Symbol used to draw any unspecified values (may be NULL).
	Description	Desription for the specified label.
	Field	Field at the specified index that is used to categorize features.
	FieldCount	Number of fields used by the renderer (0-3).
	FieldDelimiter	Delimiter used to separate field values.
	FieldType	Indicates if the field at the specified index is a string.
	Heading	Heading that contains the specified value.
	Label	Label for the specified value.
	LookupStyleset	Style used for matching (user interface property only).
	ReferenceValue	Reference value for the specified value.
	RemoveAllValues	Removes all values from the renderer.
	RemoveValue	Removes a value from the renderer.
	Symbol	Symbol associated with the specified value.
	UseDefaultSymbol	Indicates if DefaultSymbol is used for drawing unspecified values.
	Value	Value at the specified index.
	ValueCount	Number of unique values used to categorize the data.

CoClasses that implement IUniqueValueRenderer

Remarks

Use IUniqueValueRenderer to work with the properties of a UniqueValueRenderer.

This interface is used to manage the list of categories and symbols. Each unique Value in your data can define a unique category, represented with a single Symbol, and values can also be combined by grouping so that more than one value is symbolized with the same symbol. To work with grouping use AddReferenceValue and ReferenceValue. Also, Headings can be used to organize categories in the table of contents and legend, use Heading to assign a value to a particular heading.

Unique value renderering is typically based on a single attribute Field, however up to 3 fields can be used. When more than one field is used, the combinations of the unique values from each field are used to define the categories. So, for example if two fields are used which store the values A and B; and X, Y, and Z respectively, then the initial categories will be defined as A|X, A|Y, A|Z, B|X, B|Y, and B|Z.