SpatialEdmFunctions.IsRing(DbExpression) Method

Reference

Definition

Namespace:: System.Data.Common.CommandTrees.ExpressionBuilder.Spatial

Assembly:: System.Data.Entity.dll

Important

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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.

public:
[System::Runtime::CompilerServices::Extension]
 static System::Data::Common::CommandTrees::DbFunctionExpression ^ IsRing(System::Data::Common::CommandTrees::DbExpression ^ geometryValue);

public static System.Data.Common.CommandTrees.DbFunctionExpression IsRing(this System.Data.Common.CommandTrees.DbExpression geometryValue);

static member IsRing : System.Data.Common.CommandTrees.DbExpression -> System.Data.Common.CommandTrees.DbFunctionExpression

<Extension()>
Public Function IsRing (geometryValue As DbExpression) As DbFunctionExpression

Parameters

geometryValue: DbExpression

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

Returns

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.

Exceptions

ArgumentNullException

geometryValue

ArgumentException