IsRing Method
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SpatialEdmFunctions.IsRing Method (DbExpression)

.NET Framework (current version)
 

Creates a DbFunctionExpression that invokes the canonical 'IsRing' function with the specified argument, which must have an Edm.Geometry result type. The result type is Edm.Boolean.

Namespace:   System.Data.Common.CommandTrees.ExpressionBuilder.Spatial
Assembly:  System.Data.Entity (in System.Data.Entity.dll)

public static DbFunctionExpression IsRing(
	this DbExpression geometryValue
)

Parameters

geometryValue
Type: System.Data.Common.CommandTrees.DbExpression

An expression that specifies the geometry curve value from which the IsRing value should be retrieved.

Return Value

Type: System.Data.Common.CommandTrees.DbFunctionExpression

A new DbFunctionExpression that returns either a Boolean value indicating whether geometryValue is a ring (both closed and simple), or null if geometryValue is not a curve.

Exception Condition
ArgumentNullException

geometryValue

ArgumentException

geometryValue

.NET Framework
Available since 4.5
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